GTE / Gran Tierra Energy Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Gran Tierra Energy Inc.
US ˙ NYSEAM ˙ US38500T2006

Mga Batayang Estadistika
LEI 549300IH2S17MAIUCM32
CIK 1273441
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Gran Tierra Energy Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
August 25, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT GRAN TIERRA ENERGY INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT GRAN TIERRA ENERGY INC. (Exact name of registrant as specified in its charter) Delaware 001-34018 (State or other jurisdiction of incorporation) (Commission File Number) 500 Centre Street S.E. Calgary, Alberta, Canada T2G 1A6 (Address of principal executive offices) (Zip code) Phillip Abra

August 25, 2025 EX-2.01.INS

Paid in Colombian Pesos. Translated at the 2024 average foreign exchange rate of 4,071.35:1 USD

iso4217:USD 0001273441 country:CO gte:NATIONALGOVERNMENTOFCOLOMBIANATIONALHYDROCARBONAGENCYOFCOLOMBIAMember 2024-01-01 2024-12-31 0001273441 country:CO gte:NATIONALGOVERNMENTOFCOLOMBIADIRECTORATEOFNATIONALTAXESANDCUSTOMSOFCOLOMBIAMember 2024-01-01 2024-12-31 0001273441 country:CO gte:NATIONALGOVERNMENTOFCOLOMBIA3Member 2024-01-01 2024-12-31 0001273441 country:CO gte:MUNICIPALITYOFPUERTOASISMember

August 25, 2025 EX-2.01.SCH

XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT

LOWER MAGDALENA BASIN [Member] LOWER MAGDALENA BASIN DISTRICT OF BOGOTA [Member] DISTRICT OF BOGOTA GOVERNMENT OF ALBERTA, ALBERTA ENERGY AND MINERALS [Member] LLANOS BASIN [Member] LLANOS BASIN MUNICIPALITY OF PUERTO GUZMAN [Member] MUNICIPALITY OF PUERTO GUZMAN CHANANGUE [Member] MUNICIPALITY OF PUERTO ASIS [Member] MUNICIPALITY OF PUERTO ASIS MUNICIPALITY OF PIAMONTE [Member] MUNICIPALITY OF PI

August 25, 2025 EX-99.1

Extractive Sector Transparency Measures Act- Annual Report Reporting Year From: 2024-01-01 To: 2024-12-31 Reporting Entity Name Gran Tierra Energy Inc. Currency of the Report USD Reporting entity ESTMA Identification Number E742342 Subsidiary Reporti

Exhibit 99.1 Extractive Sector Transparency Measures Act - Annual Report Reporting Entity Name Gran Tierra Energy Inc. Reporting Year From: 1/1/2024 To: 12/31/2024 Date Submitted 5/30/2025 Reporting Entity ESTMA Identification Number E742342 ● Original Submission ○ Amended Report Other Subsidiaries Included (optional field) Not Consolidated Not Substituted Attestation by Reporting Entity In accord

July 31, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2025 GRAN TIERRA ENERGY

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2025 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identi

July 31, 2025 EX-99.1

Gran Tierra Energy Inc. Reports Second Quarter 2025 Results & Another Quarter of Record Production

Gran Tierra Energy Inc. Reports Second Quarter 2025 Results & Another Quarter of Record Production •Achieved Record Total Company Average Quarterly Production of 47,196 boepd •Funds Flow From Operations(1) of $54 million, Adjusted EBITDA(1) of $77 million and Return to Free Cash Flow •Signed Mandate Letter for Funding of Up to $200 Million •Entered into Binding Agreement to Exit the UK North Sea •

July 31, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA

June 20, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 18, 2025 GRAN TIERRA ENERGY

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 18, 2025 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission F

May 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 2, 2025 GRAN TIERRA ENERGY IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 2, 2025 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 2, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERR

May 2, 2025 EX-99.1

Gran Tierra Energy Inc. Reports First Quarter 2025 Results, Record Production and Continued Exploration Success

Gran Tierra Energy Inc. Reports First Quarter 2025 Results, Record Production and Continued Exploration Success •Achieved Record Total Company Average Quarterly Production of 46,647 boepd •Ecuador Exploration Success Continues with Additional Oil Discoveries in Iguana Block •Solid Balance Sheet, Exited the Quarter with $77 Million in Cash Following Active Capital Campaign, Paid Down $27 Million of

May 2, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2025 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identifi

April 18, 2025 EX-10.1

Credit and Guaranty Agreement, dated as of April 16, 2025, by and among Gran Tierra Energy Colombia GmbH, as borrower, the guarantors party thereto from time to time, the lenders party thereto from time to time, GLAS USA LLC, as administrative agent, GLAS Americas LLC, as collateral agent, and JPMorgan Chase Bank, N.A., as calculation agent.

Exhibit 10.1 EXECUTION VERSION CREDIT AND GUARANTY AGREEMENT dated as of April 16, 2025 among GRAN TIERRA ENERGY COLOMBIA GMBH, as Borrower, The Guarantors party hereto, The Lenders party hereto from time to time, GLAS USA LLC, as Administrative Agent, GLAS AMERICAS LLC, as Collateral Agent, and JPMORGAN CHASE BANK, N.A. as Calculation Agent BANCOLOMBIA (PANAMÁ) S.A. and JPMORGAN CHASE BANK, N.A.,

April 18, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 16, 2025 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

March 18, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defi

March 18, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

February 24, 2025 EX-99.1

Gran Tierra Energy Inc. Announces 2024 Fourth Quarter & Year-End Results

Gran Tierra Energy Inc. Announces 2024 Fourth Quarter & Year-End Results •Record Fourth Quarter Production of 41,009 BOEPD •Realized 2024 Net Income of $3 Million ($0.10 per Share, Basic) and 2024 Adjusted EBITDA1 of $367 Million •Delivered Net Cash Provided by Operating Activities of $239.3 million, up 5% from 2023 •Generated 2024 Funds Flow from Operations1 of $225 Million and Achieved 2024 Aver

February 24, 2025 EX-99.1

Gran Tierra Energy Inc. Reserves Assessment and Evaluation of Oil and

Exhibit 99.1 THIRD PARTY REPORT ON RESERVES By McDaniel & Associates Consultants Ltd. ("McDaniel") - (Independent Qualified Reserves Evaluator) This report is provided to satisfy the requirements contained in Item 1202(a)(8) of U.S. Securities and Exchange Commission Regulation S-K with respect to Gran Tierra Energy Inc’s (“Gran Tierra”) oil and gas reserves as of December 31, 2024, and to provide

February 24, 2025 EX-19.1

Insider trading policy

EXHIBIT 19.1 GRAN TIERRA ENERGY INC. INSIDER TRADING POLICY I. INTRODUCTION Federal and state laws in Canada, the United States of America and United Kingdom laws and regulations, including the Disclosure and Transparency Rules and the UK Market Abuse Regulations (altogether referred to herein as the “Laws”), prohibit buying, selling or making other transfers of securities by persons who have mate

February 24, 2025 EX-21.1

List of subsidiaries.

Exhibit 21.1 SUBSIDIARIES OF GRAN TIERRA ENERGY INC. The table below sets forth all subsidiaries of Gran Tierra Energy Inc. and the state or other jurisdiction of incorporation or organization of each as of February 20, 2025. Subsidiary Jurisdiction of Incorporation GTE Alberta Inc. Alberta, Canada Gran Tierra Canada Ltd. Canada Gran Tierra Energy Resources Inc. Cayman Islands Petrolifera Petroleu

February 24, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2025 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Id

February 24, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA ENE

January 24, 2025 EX-99.1

Gran Tierra Energy Inc. Reports Robust Reserves Replacement and Record High Reserves

Exhibit 99.1 Gran Tierra Energy Inc. Reports Robust Reserves Replacement and Record High Reserves • Sixth Consecutive Year of 1P Total Reserves Growth Resulting in Highest Total Reserves in Company History • Delivered 702% 1P and 1,249% 2P Reserves Replacement Including Recent Acquisition • Total Liquids 1P and 2P Reserves Increased to 128 and 217 Million Barrels of Oil Equivalent with 1P and 2P R

January 24, 2025 EX-99.2

Gran Tierra Energy Inc. Announces 2025 Guidance and Operations Update

Exhibit 99.2 Gran Tierra Energy Inc. Announces 2025 Guidance and Operations Update · 2025 Capital Expenditure Budget of $240-280 Million and Expected 2025 Cash Flow1 of $260-300 Million · 2025 Capital Program Includes 10-14 Development Wells and 6-8 High Impact Exploration Wells · Forecast 2025 Production of 47,000-53,000 BOEPD, Representing at the Midpoint, an Increase of 44% from 2024 · Forecast

January 24, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 23, 2025 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 23, 2025 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

January 15, 2025 EX-99.1

Gran Tierra UK Limited (Formerly i3 Energy Plc) Financial Statements for the Year Ended 31 December 2023 INDEPENDENT AUDITOR’S REPORT

Exhibit 99.1 Gran Tierra UK Limited (Formerly i3 Energy Plc) Financial Statements for the Year Ended 31 December 2023 INDEPENDENT AUDITOR’S REPORT To the Board of Directors and Shareholders of Gran Tierra UK Limited (formerly i3 Energy plc) Opinion We have audited the accompanying financial statements of Gran Tierra UK Limited (formerly i3 Energy plc) (the ‘parent company’) and its subsidiaries (t

January 15, 2025 EX-99.2

Gran Tierra UK Limited (Formerly i3 Energy Plc) unaudited Condensed consolidated interim financial statements for the Three and Nine months Ended 30 September 2024

Exhibit 99.2 Gran Tierra UK Limited (Formerly i3 Energy Plc) unaudited Condensed consolidated interim financial statements for the Three and Nine months Ended 30 September 2024 1 Gran Tierra UK Limited (formerly i3 Energy plc) 30 September 2024 Financial Statements Contents Financial Statements 3 Condensed Consolidated Statement of Comprehensive Income 3 Condensed Consolidated Statement of Financi

January 15, 2025 EX-99.3

UNAUDITED PRO FORMA CONDENSED CONsolidAteD FINANCIAL INFORMATION All amounts expressed in Thousands of U.S. Dollars, except share and per share amounts or otherwise noted

Exhibit 99.3 UNAUDITED PRO FORMA CONDENSED CONsolidAteD FINANCIAL INFORMATION All amounts expressed in Thousands of U.S. Dollars, except share and per share amounts or otherwise noted On October 31, 2024, Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) acquired all of the issued and outstanding common shares of i3 Energy plc (“i3 Energy”), through a court sanctioned scheme arrangement und

January 15, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 14, 2025 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 14, 2025 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

November 14, 2024 SC 13G/A

GTE / Gran Tierra Energy Inc. / GMT CAPITAL CORP - AMENDMENT TO FORM SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13 G/A Under the Securities Exchange Act of 1934 (Amendment No. 7)* Gran Tierra Energy, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 38500T200 (CUSIP Number) September 30, 2024 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

November 14, 2024 SC 13G/A

GTE / Gran Tierra Energy Inc. / MASON HILL ADVISORS LLC Passive Investment

SC 13G/A 1 grantierra13ga1-09302024.htm SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Gran Tierra Energy Inc. (Name of Issuer) Common Shares, par value $0.001 per share (Title of Class of Securities) 38500T200 (CUSIP Number) September 30, 2024 (Date of Event which Requires Filing of this Statement) Check the appr

November 4, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN T

November 4, 2024 EX-10.3

Amended and Restated Credit Agreement, dated as of October 31, 2024, between i3 Energy Canada Ltd., as borrower, the lenders party thereto, and National Bank of Canada, as administrative agent, and National Bank Financial Markets, as lead arranger.†

Exhibit 10.3 i3 ENERGY CANADA LTD. as Borrower - and - THE PERSONS PARTY HERETO FROM TIME-TO-TIME IN THEIR CAPACITIES AS LENDERS - and - THOSE OTHER FINANCIAL INSTITUTIONS WHICH HEREAFTER BECOME LENDERS UNDER THIS AGREEMENT - and - NATIONAL BANK OF CANADA as Administrative Agent - and with - NATIONAL BANK FINANCIAL MARKETS as Lead Arranger AMENDED AND RESTATED CREDIT AGREEMENT October 31, 2024 TAB

November 4, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2024 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2024 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ide

November 4, 2024 EX-99.1

Gran Tierra Energy Inc. Reports Third Quarter 2024 Results and Announces its Sixth Consecutive Ecuador Oil Discovery from the Charapa-B7 Well

Gran Tierra Energy Inc. Reports Third Quarter 2024 Results and Announces its Sixth Consecutive Ecuador Oil Discovery from the Charapa-B7 Well •Gran Tierra Announces its Sixth Consecutive Ecuador Oil Discovery from the Charapa-B7 Well and Has Achieved Cumulative Production of Over 1 Million Barrels of Oil in Ecuador •Gran Tierra Achieved $1 Million in Net Income and Generated $60 Million in Funds F

November 4, 2024 EX-10.2

Term Loan Facility Agreement, dated as of August 19, 2024, between Gran Tierra Energy Inc., as borrower, and Trafigura PTE Ltd., as lender.

Exhibit 10.2 Dated 19 August 2024 PROJECT SENATOR GRAN TIERRA ENERGY INC. as the Company and TRAFIGURA PTE LTD as the Lender TERM LOAN FACILITY AGREEMENT Index Clause Page 2 The Facility 20 3 Purpose 20 4 Conditions of Utilisation 20 5 Utilisation 22 6 Repayment 22 7 Prepayment and Cancellation 22 8 Restrictions 23 9 Interest 24 10 Interest Periods 24 11 Fees 26 12 Tax Gross Up and Indemnities 26

September 19, 2024 EX-99.1

Gran Tierra Energy Inc. Announces Private Offering of an Additional Amount of its 9.500% Senior Secured Amortizing Notes due 2029

Exhibit 99.1 Gran Tierra Energy Inc. Announces Private Offering of an Additional Amount of its 9.500% Senior Secured Amortizing Notes due 2029 Calgary, Alberta, September 12, 2024 (GLOBE NEWSWIRE) – Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced that it intends, subject to market and other conditions, to offer an additional amount of

September 19, 2024 EX-99.3

Gran Tierra Energy Inc. Announces Closing of an Additional $150 Million Aggregate Principal Amount of its 9.500% Senior Secured Amortizing Notes due 2029

Exhibit 99.3 Gran Tierra Energy Inc. Announces Closing of an Additional $150 Million Aggregate Principal Amount of its 9.500% Senior Secured Amortizing Notes due 2029 Calgary, Alberta, September 18, 2024 (GLOBE NEWSWIRE) – Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced that it has completed its previously announced offering of an addi

September 19, 2024 EX-99.2

Gran Tierra Energy Inc. Announces Pricing of an Additional $150 Million Aggregate Principal Amount of its 9.500% Senior Secured Amortizing Notes due 2029

Exhibit 99.2 Gran Tierra Energy Inc. Announces Pricing of an Additional $150 Million Aggregate Principal Amount of its 9.500% Senior Secured Amortizing Notes due 2029 Calgary, Alberta, September 13, 2024 (GLOBE NEWSWIRE) – Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced that it has priced its offering of an additional $150 million aggr

September 19, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 12, 2024 GRAN TIERRA EN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 12, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commiss

September 17, 2024 SC 13G

GTE / Gran Tierra Energy Inc. / MASON HILL ADVISORS LLC Passive Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )* Gran Tierra Energy Inc. (Name of Issuer) Common Shares, par value $0.001 per share (Title of Class of Securities) 38500T200 (CUSIP Number) August 26, 2024 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant t

August 30, 2024 EX-99.1

RECOMMENDED AND FINAL* CASH AND SHARE ACQUISITION i3 Energy plc ("i3 Energy") by Gran Tierra Energy Inc. ("Gran Tierra") to be implemented by way of a scheme of arrangement under Part 26 of the Companies Act 2006

Exhibit 99.1 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF THAT JURISDICTION. RECOMMENDED AND FINAL* CASH AND SHARE ACQUISITION for i3 Energy plc ("i3 Energy") by Gran Tierra Energy Inc. ("Gran Tierra") to be implemented by way of a scheme

August 30, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 29, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

August 23, 2024 CORRESP

GRAN TIERRA ENERGY INC. 500 Centre Street S.E. Calgary, Alberta, Canada T2G 1A6

GRAN TIERRA ENERGY INC. 500 Centre Street S.E. Calgary, Alberta, Canada T2G 1A6 VIA EDGAR August 23, 2024 United States Securities and Exchange Commission Division of Corporation Finance Office of Energy & Transportation 100 F Street, N.E. Washington, D.C. 20549 Re: Gran Tierra Energy Inc. Registration Statement on Form S-3 (File No. 333-281161) To Whom it May Concern: Pursuant to Rule 461 under t

August 22, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT GRAN TIERRA ENERGY INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT GRAN TIERRA ENERGY INC. (Exact name of registrant as specified in its charter) Delaware 001-34018 (State or other jurisdiction of incorporation) (Commission File Number) 500 Centre Street S.E. Calgary, Alberta, Canada T2G 1A6 (Address of principal executive offices) (Zip code) Phillip Abra

August 22, 2024 EX-99.1

Gran Tierra Energy Inc.’s Extractive Sector Transparency Measures Act report for the year ended December 31, 2023.

Exhibit 99.1 Extractive Sector Transparency Measures Act - Annual Report Reporting Entity Name Gran Tierra Energy Inc. Reporting Year From: 1/1/2023 To: 12/31/2023 Date Submitted 5/29/2024 Reporting Entity ESTMA Identification Number E742342 ● Original Submission ○ Amended Report Other Subsidiaries Included (optional field) Not Consolidated Not Substituted Attestation by Reporting Entity In accord

August 22, 2024 EX-2.01.INS

Paid in Colombian Pesos. Translated at the 2023 average foreign exchange rate of 4,325.05:1 USD

iso4217:USD 0001273441 gte:NATIONALGOVERNMENTOFCOLOMBIANATIONALHYDROCARBONAGENCYOFCOLOMBIAMember country:CO 2023-01-01 2023-12-31 0001273441 gte:NATIONALGOVERNMENTOFCOLOMBIADIRECTORATEOFNATIONALTAXESANDCUSTOMSOFCOLOMBIAMember country:CO 2023-01-01 2023-12-31 0001273441 gte:NATIONALGOVERNMENTOFCOLOMBIA3Member country:CO 2023-01-01 2023-12-31 0001273441 gte:MUNICIPALITYOFPUERTOASISMember country:CO

August 22, 2024 EX-2.01.SCH

XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT

DISTRICT OF BOGOTA [Member] DISTRICT OF BOGOTA LOWER MAGDALENA BASIN [Member] LOWER MAGDALENA BASIN MUNICIPALITY OF PUERTO GUZMAN [Member] MUNICIPALITY OF PUERTO GUZMAN LLANOS BASIN [Member] LLANOS BASIN MUNICIPALITY OF PUERTO ASIS [Member] MUNICIPALITY OF PUERTO ASIS MUNICIPALITY OF PIAMONTE [Member] MUNICIPALITY OF PIAMONTE MUNICIPALITY OF SAN MARTIN [Member] MUNICIPALITY OF SAN MARTIN ENTITY WI

August 20, 2024 EX-10.1

Form of Deed of Irrevocable Undertaking.

Exhibit 10.1 Form of Deed of Irrevocable Undertaking To:         Gran Tierra Energy Inc. (the Bidder) [Insert Address of Bidder] l 2024 Offer for i3 Energy plc (the Target) We understand that the Bidder is considering the Acquisition substantially on the terms and conditions set out or referred to in the draft of the announcement to be released pursuant to Rule 2.7 of the Code attached at Appendix

August 20, 2024 EX-2.1

Rule 2.7 Announcement

Exhibit 2.1 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY IN, INTO OR FROM ANY RESTRICTED JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF SUCH JURISDICTION. THE FOLLOWING ANNOUNCEMENT IS AN ADVERTISEMENT AND NOT A PROSPECTUS OR CIRCULAR OR PROSPECTUS OR CIRCULAR EQUIVALENT DOCUMENT AND INVESTORS SHOULD NOT

August 20, 2024 EX-99.1

www.grantierra.com August 2024 CREATING A DIVERSIFIED PLATFORM FOR LONG - TERM VALUE RECOMMENDED ACQUISITION OF i3 ENERGY PLC

Exhibit 99.1 www.grantierra.com August 2024 CREATING A DIVERSIFIED PLATFORM FOR LONG - TERM VALUE RECOMMENDED ACQUISITION OF i3 ENERGY PLC D I S C L A I M E R The information contained in this presentation is for information purposes only and not intended to and does not constitute, or form any part of, an offer for sale, an offer to acquire or subscription or any solicitation for any offer to pur

August 20, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 19, 2024 GRAN TIERRA ENERG

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 19, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

August 20, 2024 EX-2.2

Cooperation Agreement, dated August 19, 2024, between Gran Tierra Energy Inc. and i3 Energy Plc.

Exhibit 2.2 Cooperation Agreement Gran Tierra Energy Inc. and i3 Energy Plc 19 August 2024 Contents 1. Definitions and interpretation 1 2. Publication of the Announcement and the terms of the Acquisition 7 3. Undertakings in relation to Regulatory Approvals and Conditions 7 4. Acquisition Document 10 5. Implementation of the Acquisition 10 6. Switching to a Takeover Offer 11 7. i3 Energy Plc Share

August 1, 2024 S-3

As filed with the Securities and Exchange Commission on August 1, 2024

As filed with the Securities and Exchange Commission on August 1, 2024 Registration No.

August 1, 2024 EX-FILING FEES

Filing Fee Table (filed herewith).

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Gran Tierra Energy Inc.

July 31, 2024 EX-99.1

Gran Tierra Energy Inc. Reports Second Quarter 2024 Net Income of $36 Million and Continued Exploration Success

Gran Tierra Energy Inc. Reports Second Quarter 2024 Net Income of $36 Million and Continued Exploration Success •High Impact Exploration Program Continues to Deliver Exciting Catalysts for Growth with the Completion of the Charapa 3D Seismic Program Along with Drilling of the Bocachico Norte-J1 and Charapa B6 Wells •Arawana-J1 and Bocachico-J1 Wells Continue to Yield Strong Production Results and

July 31, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA

July 31, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2024 GRAN TIERRA ENERGY

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2024 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identi

May 7, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 2, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 2, 2024 EX-99.1

Gran Tierra Energy Inc. Announces First Quarter 2024 Results

Gran Tierra Energy Inc. Announces First Quarter 2024 Results •First Quarter 2024 Total Average WI Production of 32,242 BOPD, a 3% increase from Prior Quarter •Positive Preliminary Results in the Arawana Exploration Well •Total Current(1) Average Production of Approximately 33,400 BOPD •Funds Flow from Operations of $74 Million, Free Cash Flow of $19 Million and Adjusted EBITDA of $95 Million(2) CA

May 2, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2024 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identifi

May 2, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERR

March 21, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 1

March 21, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

February 20, 2024 EX-21.1

List of subsidiaries.

Exhibit 21.1 SUBSIDIARIES OF GRAN TIERRA ENERGY INC. The table below sets forth all subsidiaries of Gran Tierra Energy Inc. and the state or other jurisdiction of incorporation or organization of each as of February 15, 2024. Subsidiary Jurisdiction of Incorporation GTE Alberta Inc. Alberta, Canada Gran Tierra Energy N.V. ULC Alberta, Canada Gran Tierra Energy International Holdings Ltd. Cayman Is

February 20, 2024 EX-99.1

Gran Tierra Energy Inc. Announces 2023 Fourth Quarter & Year-End Results, Including Successfully Meeting 2023 Guidance for Annual Production, Funds Flow From Operations1 and Free Cash Flow1

Gran Tierra Energy Inc. Announces 2023 Fourth Quarter & Year-End Results, Including Successfully Meeting 2023 Guidance for Annual Production, Funds Flow From Operations1 and Free Cash Flow1 •Realized 2023 Net Loss of $6 Million ($0.19 per Share, Basic) and 2023 Adjusted EBITDA1 of $399 Million •Generated 2023 Funds Flow from Operations1 of $277 Million and 2023 Free Cash Flow1 of $58 Million ($1.7

February 20, 2024 EX-97.1

Gran Tierra Energy Inc. Clawback Policy

Exhibit 97.1 GRAN TIERRA ENERGY INC. EXECUTIVE REMUNERATION CLAWBACK POLICY The Board of Directors (the “Board”) of Gran Tierra Energy Inc. (the “Company”) believes that it is in the best interests of the Company and its shareholders to create and maintain a culture that emphasizes integrity and accountability and that reinforces the Company’s pay-for-performance compensation philosophy. The Board

February 20, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA ENE

February 20, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 20, 2024 GRAN TIERRA ENE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 20, 2024 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Id

February 20, 2024 EX-10.72

2023, between GTE Alberta Inc, Gran Tierra Energy Inc. and Sebastien Morin.*

Exhibit 10.72 EXECUTIVE EMPLOYMENT AGREEMENT BETWEEN: GTE ALBERTA INC., an Alberta corporation (“GTE INC”) and GRAN TIERRA ENERGY INC., a Delaware corporation (“Gran Tierra”) (GTE ULC and Gran Tierra are collectively referred to herein as, the “Company”) - and - SEBASTIEN MORIN, an individual ordinarily resident in Bragg Creek in the Province of Alberta (the “Executive”) (GTE INC, Gran Tierra and

February 20, 2024 EX-99.1

Gran Tierra Energy Inc. Reserves Assessment and Evaluation of Oil and Gas Properties Corporate Summary, effective December 31, 202

Exhibit 99.1 THIRD PARTY REPORT ON RESERVES By McDaniel & Associates Consultants Ltd. ("McDaniel") - (Independent Qualified Reserves Evaluator) This report is provided to satisfy the requirements contained in Item 1202(a)(8) of U.S. Securities and Exchange Commission Regulation S-K with respect to Gran Tierra Energy Inc’s (“Gran Tierra”) oil and gas reserves as of December 31, 2023, and to provide

February 13, 2024 SC 13G/A

GTE / Gran Tierra Energy Inc. / GMT CAPITAL CORP - AMENDMENT TO FORM SC 13G Passive Investment

SC 13G/A 1 gtei-sc13ga123123.htm AMENDMENT TO FORM SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 6 )* Gran Tierra Energy, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 38500T200 (CUSIP Number) December 31, 2023 (Date of Event which Requires Filing of this Statement) Check th

February 12, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 6, 2024 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 6, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

February 6, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 6, 2024 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 6, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

February 6, 2024 EX-99.2

Gran Tierra Energy Inc. Announces Pricing of an Additional $100 Million Aggregate Principal Amount of its 9.500% Senior Secured Amortizing Notes due 2029

Exhibit 99.2 Gran Tierra Energy Inc. Announces Pricing of an Additional $100 Million Aggregate Principal Amount of its 9.500% Senior Secured Amortizing Notes due 2029 Calgary, Alberta, February 1, 2024 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced that it has priced its offering of an additional $100 million aggreg

February 6, 2024 EX-99.3

Gran Tierra Energy Inc. Announces Closing of an Additional $100 Million Aggregate Principal Amount of its 9.500% Senior Secured Amortizing Notes due 2029

Exhibit 99.3 Gran Tierra Energy Inc. Announces Closing of an Additional $100 Million Aggregate Principal Amount of its 9.500% Senior Secured Amortizing Notes due 2029 Calgary, Alberta, February 6, 2024 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced that it has completed its previously announced offering of an additi

February 6, 2024 EX-99.1

Gran Tierra Energy Inc. Announces Private Offering of an Additional Amount of its 9.500% Senior Secured Amortizing Notes due 2029

Exhibit 99.1 Gran Tierra Energy Inc. Announces Private Offering of an Additional Amount of its 9.500% Senior Secured Amortizing Notes due 2029 Calgary, Alberta, February 1, 2024 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced that it intends, subject to market and other conditions, to offer an additional amount of it

February 1, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 1, 2024 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 1, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

February 1, 2024 EX-99.1

THIRD PARTY REPORT ON RESERVES By McDaniel & Associates Consultants Ltd. (“McDaniel”) - (Independent Qualified Reserves Evaluator)

Exhibit 99.1 THIRD PARTY REPORT ON RESERVES By McDaniel & Associates Consultants Ltd. (“McDaniel”) - (Independent Qualified Reserves Evaluator) This report is provided to satisfy the requirements contained in Item 1202(a)(8) of Regulation S-K (“Regulation S-K”) of the U.S. Securities and Exchange Commission (the “SEC”) with respect to Gran Tierra Energy Inc.’s (“Gran Tierra”) oil and gas reserves

January 31, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 29, 2024 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 29, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

January 23, 2024 EX-99.2

Gran Tierra Energy Inc. Announces 2024 Guidance and Operations Update

Exhibit 99.2 Gran Tierra Energy Inc. Announces 2024 Guidance and Operations Update · 2024 Capital Expenditure Budget of $210-240 Million and Expected 2024 Cash Flow1 of $280-320 Million in Base Case · Plan to Drill 13-17 Development Wells and 6-9 High Impact Near-Field Exploration Wells · Forecast 2024 Production of 32,000-35,000 BOPD, Increases of 4% from 2023, 11% from 2022 and 28% from 2021 · F

January 23, 2024 EX-99.1

Gran Tierra Energy Inc. Announces Strong Reserves Replacement and Meaningful Reserves Growth in 2023

Exhibit 99.1 Gran Tierra Energy Inc. Announces Strong Reserves Replacement and Meaningful Reserves Growth in 2023 · Highest Year-End Total Company Reserves in Company History - 90 MMBOE 1P, 147 MMBOE 2P and 207 MMBOE 3P · Added Total Company Reserves of 18 MMBOE 1P, 29 MMBOE 2P and 36 MMBOE 3P · Achieved 154% 1P, 242% 2P and 303% 3P Reserves Replacement · Fifth Consecutive Year of 1P Total Company

January 23, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 23, 2024 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 23, 2024 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

November 1, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 31, 2023 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 31, 2023 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ide

November 1, 2023 EX-99.1

Gran Tierra Energy Inc. Announces Third Quarter 2023 Results Including the Highest Production Since the Second Quarter of 2019, Net Income of $7 Million and $36 Million of Free Cash Flow

Gran Tierra Energy Inc. Announces Third Quarter 2023 Results Including the Highest Production Since the Second Quarter of 2019, Net Income of $7 Million and $36 Million of Free Cash Flow •Third Quarter 2023 Total Average WI Production of 33,940 BOPD, Up 12% from One Year Ago and Up 1% from Prior Quarter, Highest Quarterly Average Since Second Quarter 2019 •Third Quarter 2023 Net Income of $7 Milli

November 1, 2023 EX-10.1

, 2023 by and among Gran Tierra Energy Inc., Gran Tierra Energy Colombia

EXHIBIT 10.1 Dated 19 September 2023 GRAN TIERRA ENERGY COLOMBIA GMBH GRAN TIERRA OPERATIONS COLOMBIA GMBH as Borrowers and TRAFIGURA PTE LTD as Lender and GRAN TIERRA ENERGY INC. as Guarantor DEED OF AMENDMENT AND RESTATEMENT relating to a facility agreement dated 18 August 2022 and amended and restated pursuant to an amendment and restatement agreement dated 20 February 2023 Index Clause Page 1D

November 1, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN T

October 31, 2023 EX-99.1

Gran Tierra Energy Inc. Announces Appointment of Chief Operating Officer

Exhibit 99.1 Gran Tierra Energy Inc. Announces Appointment of Chief Operating Officer CALGARY, ALBERTA, October 31, 2023, Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)(TSX:GTE)(LSE:GTE) is pleased to announce the appointment of Mr. Sebastien Morin as Chief Operating Officer (“COO”). Mr. Morin will be joining Gran Tierra as COO, located in Calgary and will report to G

October 31, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 31, 2023 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 31, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

October 24, 2023 EX-4.1

Indenture related to the 9.500% Senior Secured Amortizing Notes due 2029, dated as of October 20, 2023, among Gran Tierra Energy Inc., the guarantors named therein, and U.S. Bank Trust Company, National Association (incorporated by reference to Exhibit 4.1 to the Company’s Form 8-K filed on October 24, 2023).

Exhibit 4.1 Execution Version GRAN TIERRA ENERGY INC. $487,590,000 9.500% SENIOR SECURED AMORTIZING NOTES DUE 2029 INDENTURE Dated as of October 20, 2023 GRAN TIERRA ENERGY INC., as Issuer GRAN TIERRA ENERGY CI GMBH, GRAN TIERRA OPERATIONS COLOMBIA GMBH, AND GRAN TIERRA ENERGY COLOMBIA GMBH, as Note Guarantors and U.S. Bank Trust Company, National Association, as Trustee, Security Registrar, Payin

October 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 20, 2023 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 20, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

October 19, 2023 EX-99.1

Gran Tierra Energy Inc. Announces Expiration and Final Results for the Previously Announced Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures

Exhibit 99.1 Gran Tierra Energy Inc. Announces Expiration and Final Results for the Previously Announced Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures CALGARY, Alberta, October 19, 2023 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today

October 19, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 19, 2023 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 19, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

October 3, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 3, 2023 GRAN TIERRA ENERG

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 3, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

October 3, 2023 EX-99.1

Gran Tierra Energy Inc. Announces Early Participation Deadline Results for the Previously Announced Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures

Exhibit 99.1 Gran Tierra Energy Inc. Announces Early Participation Deadline Results for the Previously Announced Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures CALGARY, Alberta, October 3, 2023 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE)

September 19, 2023 EX-99.1

Gran Tierra Energy Inc. Announces Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures

Exhibit 99.1 Gran Tierra Energy Inc. Announces Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures CALGARY, Alberta, September 19, 2023 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced the commencement of offers to Eligible Holders

September 19, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 19, 2023 GRAN TIERRA EN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 19, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commiss

August 2, 2023 EX-99.1

Gran Tierra Energy Inc. Announces Meaningful Reserves Growth in Mid-Year 2023 Reserves Update

Exhibit 99.1 Gran Tierra Energy Inc. Announces Meaningful Reserves Growth in Mid-Year 2023 Reserves Update • Highest Reserves in Company History - 94 MMBOE 1P, 150 MMBOE 2P and 212 MMBOE 3P • Achieved 270% 1P, 433% 2P and 599% 3P Reserves Replacement • Incurred F&D Costs Excluding Change in FDC of $8.55 (1P), $5.33 (2P) and $3.86 (3P) per boe • Net Present Value Before Tax Discounted at 10% Increa

August 2, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 1, 2023 GRAN TIERRA ENERGY

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 1, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

August 1, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2023 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ident

August 1, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA

August 1, 2023 EX-99.1

Gran Tierra Energy Inc. Announces Second Quarter 2023 Results

Gran Tierra Energy Inc. Announces Second Quarter 2023 Results •Second Quarter 2023 Total Average Production of 33,719 BOPD, Up 10% from One Year Ago and Up 7% from Prior Quarter •Third Quarter-To-Date 2023 Total Average Production(1) of Approximately 35,300 BOPD •Colombia 2023 Development Campaign Complete - 21 Wells Drilled During First Half 2023 CALGARY, ALBERTA, August 1, 2023, Gran Tierra Ener

July 13, 2023 EX-99.1

Gran Tierra Energy Inc. Provides Operational Update

Exhibit 99.1 Gran Tierra Energy Inc. Provides Operational Update • Achieved Second Quarter 2023 Total Company Average Production of Approximately 33,800 BOPD, an Increase of 7% from First Quarter 2023 • 2023 Year-to-Date Total Company Average Production1 of Approximately 32,900 BOPD • Total Company Current Average Production1 of Approximately 34,800 BOPD • 2023 Capital Expenditures Expected To Be

July 13, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 12, 2023 GRAN TIERRA ENERGY

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 12, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission F

May 5, 2023 EX-3.1

Certificate of Amendment to Certificate of Incorporation of Gran Tierra Energy Inc., effective May 5, 2023

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO CERTIFICATE OF INCORPORATION OF GRAN TIERRA ENERGY INC. Gran Tierra Energy Inc. (the “Corporation”), a corporation organized and existing under and by virtue of the provisions of the General Corporation Law of the State of Delaware (the “General Corporation Law”), does hereby certify as follows: 1. The current name of the Corporation is Gran Tierra Energy In

May 5, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 4, 2023 GRAN TIERRA ENERGY IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 4, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 4, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 3, 2023 GRAN TIERRA ENERGY IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 3, 2023 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 3, 2023 EX-99.1

Gran Tierra Energy Inc. Announces First Quarter 2023 Results

Gran Tierra Energy Inc. Announces First Quarter 2023 Results •First Quarter 2023 Total Average Production of 31,611 BOPD, Up 8% from One Year Ago •Second Quarter-To-Date 2023(1) Total Average Production of Approximately 32,400 BOPD •Net Loss of $10 Million, Net Income of $115 Million Over Last 12 Months •Adjusted EBITDA(2) of $89 Million, $459 Million Over Last 12 Months •Funds Flow from Operation

May 3, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERR

May 3, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2023 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identifi

April 26, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

April 6, 2023 EX-99.1

Gran Tierra Energy Inc. Provides Operational and Financial Update

Exhibit 99.1 Gran Tierra Energy Inc. Provides Operational and Financial Update • Achieved First Quarter 2023 Total Company Average Production of Approximately 31,700 BOPD, an Increase of 8% from First Quarter 2022 • Acordionero Field Producing Approximately 20,000 BOPD for First Time Since Second Quarter 2019 • Share Buybacks: Purchased 13 Million Gran Tierra Shares of Common Stock During First Qu

April 6, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 4, 2023 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identi

March 24, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

March 24, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

March 3, 2023 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

February 22, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA ENE

February 22, 2023 EX-99.1

Gran Tierra Energy Inc. Announces 2022 Fourth Quarter & Year-End Results, Including Record Net Income, Funds Flow from Operations and Free Cash Flow

Gran Tierra Energy Inc. Announces 2022 Fourth Quarter & Year-End Results, Including Record Net Income, Funds Flow from Operations and Free Cash Flow •Achieved 2022 Net Income of $139 Million ($0.38 per Share, Basic), Highest on Record •2022 Funds Flow from Operations2 Increased 96% Year-Over-Year to $366 Million, Highest on Record •2022 Adjusted EBITDA2 Increased 103% Year-Over-Year to $490 Millio

February 22, 2023 EX-99.1

Gran Tierra Energy Inc. Reserves Assessment and Evaluation of Oil and Gas Properties Corporate Summary, effective December 31, 202

Exhibit 99.1 THIRD PARTY REPORT ON RESERVES By McDaniel & Associates Consultants Ltd. ("McDaniel") - (Independent Qualified Reserves Evaluator) This report is provided to satisfy the requirements contained in Item 1202(a)(8) of U.S. Securities and Exchange Commission Regulation S-K with respect to Gran Tierra Energy Inc’s (“Gran Tierra”) oil and gas reserves as of December 31, 2022, and to provide

February 22, 2023 EX-10.15

Deed of Amendment and Restatement to Credit Agreement dated February 20, 2023 by and among Gran Tierra Energy Inc.,

Exhibit 10.15 Dated 20 February 2023 GRAN TIERRA ENERGY COLOMBIA GMBH GRAN TIERRA OPERATIONS COLOMBIA GMBH as Borrowers and TRAFIGURA PTE LTD as Lender and GRAN TIERRA ENERGY INC. as Guarantor DEED OF AMENDMENT AND RESTATEMENT relating to a facility agreement dated 18 August 2022 Index Clause Page 1 Definitions and Interpretation 2 2 Conditions Precedent 3 3 Amendment and Restatement of Original F

February 22, 2023 EX-21.1

List of subsidiaries.

Exhibit 21.1 SUBSIDIARIES OF GRAN TIERRA ENERGY INC. The table below sets forth all subsidiaries of Gran Tierra Energy Inc. and the state or other jurisdiction of incorporation or organization of each as of February 16, 2023. Subsidiary Jurisdiction of Incorporation GTE Alberta Inc. Alberta, Canada Gran Tierra Energy N.V. ULC Alberta, Canada Gran Tierra Energy International Holdings Ltd. Cayman Is

February 22, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 21, 2023 GRAN TIERRA ENE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 21, 2023 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Id

January 25, 2023 EX-99.1

Gran Tierra Energy Inc. Announces Strong Reserves Replacement and Continued Reserves Growth in 2022

Exhibit 99.1 Gran Tierra Energy Inc. Announces Strong Reserves Replacement and Continued Reserves Growth in 2022 • Added Total Company Reserves of 14 MMBOE 1P, 17 MMBOE 2P and 31 MMBOE 3P • Achieved 126% 1P, 148% 2P and 280% 3P Reserves Replacement • Fourth Consecutive Year of 1P Reserves Growth • Exploration Discoveries Alone Added Company Reserves of 5 MMBOE 1P, 16 MMBOE 2P and 32 MMBOE 3P • Ach

January 25, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 24, 2023 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ide

January 19, 2023 SC 13G/A

GTE / Gran Tierra Energy, Inc. / GMT CAPITAL CORP - SCHEDULE 13G/A - GRAN TIERRA ENERGY INC. Passive Investment

SC 13G/A 1 eps8864gte.htm SCHEDULE 13G/A - GRAN TIERRA ENERGY INC. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 5)* Gran Tierra Energy Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 38500T101 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statement) C

January 10, 2023 EX-99.1

Gran Tierra Energy Inc. Provides Operational and Financial Update

Exhibit 99.1 Gran Tierra Energy Inc. Provides Operational and Financial Update • Gran Tierra Met Production Guidance with 2022 Total Company Average Production of Approximately 30,800 BOPD • Fourth Quarter 2022 Total Company Average Production of Approximately 32,600 BOPD, an Increase of 10% from Fourth Quarter 2021 • Strong Exit with Total Company Average Production During December 2022 of Approx

January 10, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 9, 2023 GRAN TIERRA ENERG

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 9, 2023 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Iden

November 2, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2022 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2022 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ide

November 2, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN T

November 2, 2022 EX-99.1

Gran Tierra Energy Inc. Announces Third Quarter 2022 Results

Gran Tierra Energy Inc. Announces Third Quarter 2022 Results •Third Quarter 2022 Average Production of 30,391 BOPD, Up 5% from One Year Ago •Fourth Quarter-To-Date 2022 Average Production(1) of 32,291 BOPD •Net Income of $39 Million, $168 Million Over The Last 12 Months •Adjusted EBITDA(2) of $121 Million, Up 48% Year-on-Year, $462 Million Over Last 12 Months •Net Cash Provided by Operating Activi

October 12, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 11, 2022 GRAN TIERRA ENER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 11, 2022 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ide

October 12, 2022 EX-99.1

Gran Tierra Energy Inc. Provides Operational and Financial Updates

Exhibit 99.1 Gran Tierra Energy Inc. Provides Operational and Financial Updates • Achieved Third Quarter 2022 Average Production of Approximately 30,391 BOPD, Up 5% from One Year Ago • Fourth Quarter-To-Date 2022 Total Company Average Production(1) of Approximately 32,000 BOPD • Bought Back 10.8 Million Gran Tierra Shares of Common Stock for $14.4 Million during September 2022 • Bought Back 6.7% o

August 23, 2022 EX-10.1

Credit Agreement, dated as of August 18, 2022, by and among Gran Tierra Energy Inc., Gran Tierra Energy Colombia GMBH, Gran Tierra Operations Colombia GMBH and Trafigura PTE Ltd. as a lender

Exhibit 10.1 EXECUTION VERSION Dated August 18, 2022 GRAN TIERRA ENERGY COLOMBIA, LLC GRAN TIERRA COLOMBIA INC. as Borrowers and TRAFIGURA PTE LTD as Lender and GRAN TIERRA ENERGY INC. as Guarantor Facility Agreement relating to an amount of up to US$150,000,000 Index Clause Page 1 Interpretation 3 2 The Commitment and Loans 7 3 Purpose 7 4 Conditions Precedent 8 5 Loan 8 6 Repayment and Deduction

August 23, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 18, 2022 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Iden

August 8, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2022 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ident

August 8, 2022 EX-99.1

Gran Tierra Energy Inc. Announces Second Quarter 2022 Results

Gran Tierra Energy Inc. Announces Second Quarter 2022 Results ?Average Total Production of 30,607 BOPD, Highest since Fourth Quarter 2019 ?Total Average Production Up 4% from First Quarter 2022 and 33% from Second Quarter 2021 ?Generated Net Income of $53 Million ?Increased Adjusted EBITDA(1) to $140 Million, Up 286% Year-on-Year ?Grew Net Cash Provided by Operating Activities to $143 Million, Up

August 8, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA

July 12, 2022 EX-99.1

Gran Tierra Energy Inc. Provides Operations and Financial Update

Exhibit 99.1 Gran Tierra Energy Inc. Provides Operations and Financial Update ? Achieved Total Average Production of 30,607 BOPD During Second Quarter 2022, The Highest Since 2019 ? Second Quarter 2022 Total Average Production Up 4% from First Quarter 2022 and 25% from Second Quarter 2021 ? Ecuador and Colombia 2022 Exploration Programs Remain On-Track ? As of June 30, 2022, Cash on Balance Sheet

July 12, 2022 8-K

Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 11, 2022 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identi

June 22, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 21, 2022 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission F

June 22, 2022 EX-99.1

Gran Tierra Energy Inc. Announces Termination of the Previously Announced Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures

Exhibit 99.1 Gran Tierra Energy Inc. Announces Termination of the Previously Announced Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures CALGARY, Alberta, June 21, 2022 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (?Gran Tierra? or the ?Company?) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced the termina

June 8, 2022 EX-99.1

Gran Tierra Energy Inc. Provides Operational and Financial Update

Exhibit 99.1 Gran Tierra Energy Inc. Provides Operational and Financial Update ? Achieved Total Average Production(1) of 30,556 BOPD During Second Quarter-to-Date 2022 ? Total Current Average Production(2) of 33,140 BOPD ? Paid Down Credit Facility Balance to $0 ? Acordionero and Costayaco Infill Development Drilling Campaigns Yielding Encouraging Results ? Spud the Company's First Exploration Wel

June 8, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 7, 2022 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fi

June 8, 2022 EX-99.2

Gran Tierra Energy Inc. Announces Early Participation Deadline Results for the Previously Announced Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures and Extens

Exhibit 99.2 Gran Tierra Energy Inc. Announces Early Participation Deadline Results for the Previously Announced Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures and Extension of the Early Participation Deadline CALGARY, Alberta, June 7, 2022 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (?Gran Tierra? or the ?

May 25, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 24, 2022 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fi

May 25, 2022 EX-99.1

Gran Tierra Energy Inc. Announces Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures

Exhibit 99.1 Gran Tierra Energy Inc. Announces Exchange Offers of Certain Existing Notes for New Notes and the Solicitations of Consents to Proposed Amendments to the Existing Indentures CALGARY, Alberta, May 24, 2022 (GLOBE NEWSWIRE) - Gran Tierra Energy Inc. (?Gran Tierra? or the ?Company?) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced the commencement of offers to Eligible Holders (as d

May 6, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 4, 2022 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 4, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERR

May 4, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2022 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identifi

May 4, 2022 EX-99.1

Gran Tierra Energy Inc. Announces First Quarter 2022 Results

Gran Tierra Energy Inc. Announces First Quarter 2022 Results ?Achieved Average Total Production of 29,362 BOPD, Up 20% Year-on-Year ?Generated Net Income of $14 Million ?Increased Adjusted EBITDA(1) to $119 Million, Up 185% Year-on-Year ?Grew Net Cash Provided by Operating Activities to $104 Million, Up 148% Year-on-Year ?Increased Funds Flow from Operations(1) to $87 Million, Up 201% Year-on-Year

March 25, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14

February 23, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA ENE

February 23, 2022 EX-99.1

Gran Tierra Energy Inc. Reserves Assessment and Evaluation of Oil and Gas Properties Corporate Summary, effective December 31, 20

Exhibit 99.1 THIRD PARTY REPORT ON RESERVES By McDaniel & Associates Consultants Ltd. ("McDaniel") - (Independent Qualified Reserves Evaluator) This report is provided to satisfy the requirements contained in Item 1202(a)(8) of U.S. Securities and Exchange Commission Regulation S-K with respect to Gran Tierra Energy Inc?s (?Gran Tierra?) oil and gas reserves as of December 31, 2021, and to provide

February 23, 2022 EX-99.1

Gran Tierra Energy Inc. Announces 2021 Fourth Quarter & Year-End Results & Operational Update

Gran Tierra Energy Inc. Announces 2021 Fourth Quarter & Year-End Results & Operational Update ?Achieved 2021 Production of 26,507 BOPD, Up 17% from 2020 ?Total Current Average Production1 of Approximately 30,000 BOPD ?Generated 2021 Net Income of $42 Million, Highest Since 2018 ?2021 Adjusted EBITDA2 Increased 150% Year-Over-Year to $242 Million ?2021 Funds Flow from Operations2 Increased 312% Yea

February 23, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 22, 2022 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Id

February 23, 2022 EX-21.1

List of subsidiaries.

Exhibit 21.1 SUBSIDIARIES OF GRAN TIERRA ENERGY INC. The table below sets forth all subsidiaries of Gran Tierra Energy Inc. and the state or other jurisdiction of incorporation or organization of each as of February 18, 2022. Subsidiary Jurisdiction of Incorporation Gran Tierra Resources Limited Alberta, Canada Gran Tierra Energy N.V. ULC Alberta, Canada Gran Tierra Energy International Holdings L

February 23, 2022 EX-10.30

Amendment to Credit Agreement, dated as of December 21, 2021, by and among Gran Tierra Energy Inc., Gran Tierra Energy International Holdings Ltd., the Bank of Nova Scotia and the lenders party thereto.

Exhibit 10.30 SIXTEENTH AMENDMENT TO CREDIT AGREEMENT This Sixteenth Amendment to Credit Agreement (this ?Amendment?) is entered into effective as of the 21st day of December, 2021, by and among Gran Tierra Energy International Holdings Ltd., an exempted company incorporated with limited liability under the laws of the Cayman Islands (the ?Borrower?), Gran Tierra Energy Inc., a corporation duly fo

February 10, 2022 SC 13G/A

GTE / Gran Tierra Energy, Inc. / GMT CAPITAL CORP - SCHEDULE 13G/A - GRAN TIERRA ENERGY INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 4)* Gran Tierra Energy Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 38500T101 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

January 26, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 25, 2022 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

January 26, 2022 EX-99.1

Gran Tierra Energy Inc. Announces 2021 Year-End Reserves

Exhibit 99.1 Gran Tierra Energy Inc. Announces 2021 Year-End Reserves ? Achieved 148% PDP and 123% 1P Reserves Replacement ? Added 14.3 MMBOE of PDP Reserves and 11.9 MMBOE of 1P Reserves ? Realized PDP Finding and Development Costs of $9.51 per Barrel ? 100% of Reserves Additions Were Oil ? 1P Net Asset Value per Share Before Tax of $2.61, Up 127% from 2020 ? 2P Net Asset Value per Share Before T

January 19, 2022 EX-99.1

Gran Tierra Energy Announces Corporate Update

Exhibit 99.1 Gran Tierra Energy Announces Corporate Update ? Total Company Current Average Production of Approximately 30,000 BOPD ? Achieved 2021 Total Company Average Production of 26,500 BOPD, In-Line with Guidance ? Paid Down Credit Facility to $67.5 Million as of December 31, 2021, Representing Debt Reduction of $122.5 Million During 2021 ? SASB Report Published CALGARY, Alberta ? January 18,

January 19, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 18, 2022 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

November 26, 2021 EX-99.1

Gran Tierra Energy Inc. Announces Sale of 137,093,750 PetroTal Shares for US$30.1 Million

Exhibit 99.1 Gran Tierra Energy Inc. Announces Sale of 137,093,750 PetroTal Shares for US$30.1 Million CALGARY, ALBERTA, November 26, 2021, Gran Tierra Energy Inc. (?Gran Tierra? or the ?Company?) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced that Gran Tierra Resources Limited (?GTRL?), a wholly owned subsidiary of Gran Tierra, has procured private purchasers for the sale by GTRL of an agg

November 26, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 26, 2021 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissi

November 3, 2021 10-Q/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A AMENDMENT NO. 1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A AMENDMENT NO. 1 (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 2, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN T

November 2, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

7UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2021 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Id

November 2, 2021 EX-99.1

Gran Tierra Energy Inc. Announces Third Quarter 2021 Results

Gran Tierra Energy Inc. Announces Third Quarter 2021 Results ?Achieved Average Total Production of 28,957 BOPD, Up 53% Year-Over-Year and Up 26% from Prior Quarter ?Generated Net Income of $35 Million ?Increased Funds Flow from Operations(1) to $69 Million, Up 197% from Prior Quarter ?Generated Free Cash Flow(1)of $34 Million, Highest Since Fourth Quarter 2012 ?Credit Facility Balance Paid Down to

October 13, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 13, 2021 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

October 13, 2021 EX-99.1

Gran Tierra Energy Inc. Provides Operations and Financial Update

Exhibit 99.1 Gran Tierra Energy Inc. Provides Operations and Financial Update ? Achieved Third Quarter 2021 Average Production of Approximately 29,000 BOPD, Up 26% from Prior Quarter ? Increased Current Average Production1 to Approximately 30,600 BOPD, Highest Since February 2020 ? Paid Down Credit Facility Balance To $140 Million CALGARY, ALBERTA, October 13, 2021, Gran Tierra Energy Inc. (?Gran

September 2, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 1, 2021 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissi

September 2, 2021 EX-99.1

Gran Tierra Energy Inc. Appoints New Director

Exhibit 99.1 Gran Tierra Energy Inc. Appoints New Director CALGARY, Alberta, September 1, 2021, Gran Tierra Energy Inc. (?Gran Tierra?) (NYSE American:GTE) (TSX:GTE) (LSE:GTE), is pleased to announce the appointment of Alison Redford to the Board of Directors of Gran Tierra as an independent director, effective September 1, 2021. Ms. Redford serves as an advisor to national governments and ministr

August 11, 2021 CORRESP

GRAN TIERRA ENERGY, INC. 900, 520 - 3 Avenue SW Calgary, Alberta, Canada T2P 0R3

GRAN TIERRA ENERGY, INC. 900, 520 - 3 Avenue SW Calgary, Alberta, Canada T2P 0R3 VIA EDGAR August 11, 2021 United States Securities and Exchange Commission Division of Corporation Finance Office of Energy & Transportation 100 F Street, N.E. Washington, D.C. 20549 Re: Gran Tierra Energy, Inc. Registration Statement on Form S-3 (File No. 333-258433) To Whom it May Concern: Pursuant to Rule 461 under

August 4, 2021 EX-10.1

Amended and Restated 2007 Equity Incentive Plan.*

EXHIBIT 10.1 GRAN TIERRA ENERGY INC. 2007 EQUITY INCENTIVE PLAN ADOPTED: AUGUST 9, 2007 APPROVED BY STOCKHOLDERS: OCTOBER 10, 2007 AMENDED BY THE BOARD: DECEMBER 20, 2007 AMENDED BY THE BOARD: JANUARY 14, 2008 AMENDED BY THE BOARD: OCTOBER 9, 2008 APPROVED BY THE STOCKHOLDERS: NOVEMBER 14, 2008 AMENDED BY THE BOARD: APRIL 26, 2010 APPROVED BY THE STOCKHOLDERS: JUNE 16, 2010 AMENDED BY THE BOARD: A

August 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

7UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 3, 2021 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Iden

August 4, 2021 EX-3.1

Amendment No. 1 to Bylaws of Gran Tierra Energy Inc.

Exhibit 3.1 AMENDMENT NO. 1 TO BYLAWS OF GRAN TIERRA ENERGY INC. (Incorporated under the Laws of the State of Delaware) Adopted: August 3, 2021 The Bylaws of Gran Tierra Energy Inc., a Delaware corporation (the ?Corporation?), effective October 31, 2016 (the ?Bylaws?), having received the requisite approval from the Board of Directors of the Corporation under Article VIII, Section (2) of the Bylaw

August 4, 2021 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 3, 2021 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

August 4, 2021 S-3

As filed with the Securities and Exchange Commission on August 4, 2021

As filed with the Securities and Exchange Commission on August 4, 2021 Registration No.

August 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA

August 4, 2021 EX-99.1

Gran Tierra Energy Inc. Announces Second Quarter 2021 Results

Gran Tierra Energy Inc. Announces Second Quarter 2021 Results ?Achieved Second Quarter 2021 Average Total Production of 23,035 BOPD, Up 14% Year-Over-Year ?Reaffirms 2021 Full-Year Production Guidance of 27,500-28,500 BOPD and Capital Program of $130-150 Million ?Reaffirms 2021 Full-Year Budget Guidance: Cash Flow2 of $215-235 Million, Free Cash Flow2 of $75-95 Million, EBITDA1 of $265-285 Million

July 12, 2021 EX-99.1

Gran Tierra Energy Inc. Announces Restoration of Production and Revised Guidance

Exhibit 99.1 Gran Tierra Energy Inc. Announces Restoration of Production and Revised Guidance ? Blockades Lifted, Production Ramping Back Up: Current Average Total Production1 of 29,000 BOPD ? No Impact To Reserves, Production Volumes Merely Deferred To Higher Brent Oil Price Environment ? Updated 2021 Guidance: Higher Brent Oil Price Underpins Stronger 2021 EBITDA2 and Cash Flow2 ? Credit Facilit

July 12, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 12, 2021 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission F

June 8, 2021 SC 13G/A

GTE / Gran Tierra Energy, Inc. / GMT CAPITAL CORP - SCHEDULE 13G/A - GRAN TIERRA ENERGY INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 3)* Gran Tierra Energy Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 38500T101 (CUSIP Number) May 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

June 3, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 2, 2021 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fi

May 5, 2021 DEFA14A

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

May 5, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

7UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2021 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identif

May 5, 2021 EX-99.1

Gran Tierra Energy Inc. Announces First Quarter 2021 Results

Gran Tierra Energy Inc. Announces First Quarter 2021 Results ?Achieved First Quarter 2021 Average Production of 24,463 BOPD, Up 12% from Prior Quarter ?Increased Current Average Production to 28,200 BOPD ?2020 Sustainability Report Published ?Reaffirms 2021 Full-Year Production Guidance of 28,000-30,000 BOPD and Capital of $130-150 Million ?Increases 2021 Full-Year Budget Guidance: Cash Flow2 of $

May 5, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERR

April 12, 2021 EX-99.1

Gran Tierra Energy Inc. Provides Operations and Financial Update Achieved First Quarter 2021 Average Production of 24,463 BOPD, Up 12% from Prior Quarter Increased Current Average Production1 to 28,930 BOPD, Highest Since February 2020 Increased Acor

Exhibit 99.1 Gran Tierra Energy Inc. Provides Operations and Financial Update Achieved First Quarter 2021 Average Production of 24,463 BOPD, Up 12% from Prior Quarter Increased Current Average Production1 to 28,930 BOPD, Highest Since February 2020 Increased Acordionero Field Current Average Production1 to 16,400 BOPD, Highest Since September 2019 Reaffirms 2021 Full-Year Production Guidance of 28

April 12, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 12, 2021 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

March 25, 2021 DEF 14A

- DEF 14A

DEF 14A 1 d134919ddef14a.htm DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Com

March 25, 2021 DEFA14A

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

February 25, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2021 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Id

February 25, 2021 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA ENE

February 25, 2021 EX-99.1

Gran Tierra Energy Inc. Reserves Assessment and Evaluation of Oil and Gas Properties Corporate Summary, effective December 31, 2019.

Exhibit 99.1 THIRD PARTY REPORT ON RESERVES By McDaniel & Associates Consultants Ltd. ("McDaniel") - (Independent Qualified Reserves Evaluator) This report is provided to satisfy the requirements contained in Item 1202(a)(8) of U.S. Securities and Exchange Commission Regulation S-K with respect to Gran Tierra Energy Inc,?s (?Gran Tierra?) oil and gas reserves as December 31, 2020, and to provide t

February 25, 2021 EX-21.1

List of subsidiaries.

EX-21.1 3 gte-20201231xex211.htm EX-21.1 Exhibit 21.1 SUBSIDIARIES OF GRAN TIERRA ENERGY INC. The table below sets forth all subsidiaries of Gran Tierra Energy Inc. and the state or other jurisdiction of incorporation or organization of each as of February 19, 2021. Subsidiary Jurisdiction of Incorporation Gran Tierra Resources Limited Alberta, Canada Gran Tierra Energy Mexico Holdings 1 LLC Delaw

February 25, 2021 EX-99.1

Gran Tierra Energy Inc. Announces Fourth Quarter and Year-End Results for 2020 and Operational Update

Gran Tierra Energy Inc. Announces Fourth Quarter and Year-End Results for 2020 and Operational Update •Realized 100% 1P and 133% PDP Reserves Replacement, with $2.65 and $5.06/BOE F&D Costs •Achieved 2020 Production of 22,624 bopd •Forecast 2021 Production of 28,000-30,000 bopd for Annual Growth of 24-33% •Reduced Annual Operating and G&A Costs by $92 Million •Achieved Company's Best Safety Year i

February 25, 2021 EX-10.37

Fifteenth Amendment to Credit Agreement, dated as of December 7, 2020, by and among Gran Tierra Energy Inc., Gran Tierra Energy International Holdings Ltd., the Bank of Nova Scotia and the lenders party thereto.

Exhibit 10.37 CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDED FROM THE EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLIC DISCLOSED. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. Execution Version FIFTEENTH AMENDMENT TO CREDIT AGREEMENT This Fifteenth Amendment to Credit Agreement (this ?Amendment?) is entered into effective as of the

February 11, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* Gran Tierra Energy Inc. (Name of Issuer) Common Stock (Title of Class of Securities) (CUSIP Number) De

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* Gran Tierra Energy Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 38500T101 (CUSIP Number) December 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

January 27, 2021 EX-99.1

Gran Tierra Energy Inc. Announces 2020 Year-End Reserves and Operational Update

Exhibit 99.1 Gran Tierra Energy Inc. Announces 2020 Year-End Reserves and Operational Update • Achieved 100% 1P Reserves Replacement • Added 8.3 MMBOE of 1P Reserves • Realized 1P Finding and Development Costs of $2.65/boe • 1P and 2P Net Asset Value per Share Before Tax of $1.15 and $3.25 • 1P Reserves Equal 59% of 2P Reserves, Demonstrating Strength of Company's Proved Reserves Base • Achieved C

January 27, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 26, 2021 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

December 11, 2020 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 7, 2020 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

November 3, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN T

November 3, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

7UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2020 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Id

November 3, 2020 EX-99.1

Gran Tierra Energy Inc. Announces Third Quarter 2020 Results Production Ramping Up, Development and Workover Activities Underway Strengthened Financial Position and Liquidity Profile with Strong 2021 Outlook

Gran Tierra Energy Inc. Announces Third Quarter 2020 Results Production Ramping Up, Development and Workover Activities Underway Strengthened Financial Position and Liquidity Profile with Strong 2021 Outlook CALGARY, ALBERTA, November 2, 2020, Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced the Company's financial and operating results

August 5, 2020 EX-10.1

Fourteenth Amendment to Credit Agreement, dated as of June 1, 2020, by and among Gran Tierra Energy Inc., Gran Tierra Energy International Holdings Ltd., the Bank of Nova Scotia and the lenders party thereto.

EXHIBIT 10.1 Execution Version FOURTEENTH AMENDMENT TO CREDIT AGREEMENT This Fourteenth Amendment to Credit Agreement (this “Amendment”) is entered into effective as of the 1st day of June, 2020, by and among Gran Tierra Energy International Holdings Ltd., an exempted company incorporated with limited liability under the laws of the Cayman Islands (the “Borrower”), Gran Tierra Energy Inc., a corpo

August 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

7UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2020 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Iden

August 5, 2020 EX-99.1

Gran Tierra Energy Inc. Announces Second Quarter 2020 Results Achieved Significant Reductions in Operating and G&A Costs Resumption of Production, Development and Workover Activities in Second Half 2020 Strengthened Financial Position and Liquidity P

Gran Tierra Energy Inc. Announces Second Quarter 2020 Results Achieved Significant Reductions in Operating and G&A Costs Resumption of Production, Development and Workover Activities in Second Half 2020 Strengthened Financial Position and Liquidity Profile with Attractive Outlook for 2021 CALGARY, ALBERTA, August 4, 2020, Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)

August 5, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA

June 5, 2020 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 1, 2020 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fi

May 11, 2020 EX-99.1

Gran Tierra Energy Inc. Announces First Quarter 2020 Results Focused on Balance Sheet Protection and Long-Term Value Preservation Low Base Decline, Conventional Oil Asset Base and Operatorship Provide Competitive Advantage Prioritizing Financial Stre

Gran Tierra Energy Inc. Announces First Quarter 2020 Results Focused on Balance Sheet Protection and Long-Term Value Preservation Low Base Decline, Conventional Oil Asset Base and Operatorship Provide Competitive Advantage Prioritizing Financial Strength and Liquidity CALGARY, ALBERTA, May 11, 2020, Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)(TSX:GTE)(LSE:GTE) toda

May 11, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

7UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2020 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Identi

May 11, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERR

May 8, 2020 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 6, 2020 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission Fil

April 23, 2020 DEFA14A

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

April 17, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 16, 2020 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

April 17, 2020 EX-99.1

Gran Tierra Energy Inc. Provides Business Update in Response to Oil Price Volatility and COVID-19 and Announces Virtual Annual General Meeting

Exhibit 99.1 Gran Tierra Energy Inc. Provides Business Update in Response to Oil Price Volatility and COVID-19 and Announces Virtual Annual General Meeting CALGARY, Alberta – April 16, 2020 (GLOBE NEWSWIRE) – Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced a business update regarding the Company’s proactive measures taken to protect it

March 25, 2020 DEFA14A

GTE / Gran Tierra Energy, Inc. DEFA14A - - DEFA14A

DEFA14A 1 d905207ddefa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as

March 25, 2020 DEF 14A

GTE / Gran Tierra Energy, Inc. DEF 14A - - DEF 14A

DEF 14A 1 d876670ddef14a.htm DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Com

February 27, 2020 EX-99.1

Gran Tierra Energy Inc. Announces Fourth Quarter and Year-End Results for 2019

Gran Tierra Energy Inc. Announces Fourth Quarter and Year-End Results for 2019 CALGARY, Alberta, February 26, 2020, Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced the Company's financial and operating results for the fourth quarter and year ended December 31, 2019. All dollar amounts are in United States (“U.S.”) dollars unless otherw

February 27, 2020 EX-99.1

Gran Tierra Energy Inc. Reserves Assessment and Evaluation of Oil and Gas Properties Corporate Summary, effective December 31, 2019.

Exhibit 99.1 THIRD PARTY REPORT ON RESERVES By McDaniel & Associates Consultants Ltd. ("McDaniel") - (Independent Qualified Reserves Evaluator) This report is provided to satisfy the requirements contained in Item 1202(a)(8) of U.S. Securities and Exchange Commission Regulation S-K with respect to Gran Tierra Energy Inc,’s (“Gran Tierra”) oil and gas reserves as December 31, 2019, and to provide t

February 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2020 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Id

February 27, 2020 EX-4.11

Description of securities.

Exhibit 4.11 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 General Gran Tierra Energy Inc. (“Gran Tierra,” “us,” “our” or “we”) is authorized to issue 595,000,000 shares of capital stock, of which, (i) 570,000,000 are designated as common stock, par value $0.001 per share, and (ii) 25,000,000 are designated as preferred stock, p

February 27, 2020 EX-21.1

List of subsidiaries.

Exhibit 21.1 SUBSIDIARIES OF GRAN TIERRA ENERGY INC. The table below sets forth all subsidiaries of Gran Tierra Energy Inc. and the state or other jurisdiction of incorporation or organization of each as of February 24, 2020. Subsidiary Jurisdiction of Incorporation Gran Tierra Resources Limited Alberta, Canada Gran Tierra Energy Mexico Holdings 1 LLC Delaware Gran Tierra Energy Mexico Holdings 2

February 27, 2020 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA ENE

February 14, 2020 SC 13G

GTE / Gran Tierra Energy, Inc. / LUMINUS MANAGEMENT LLC - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Gran Tierra Energy Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 38500T101 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

February 14, 2020 SC 13G/A

GTE / Gran Tierra Energy, Inc. / GMT Capital Corp - SCHEDULE 13G/A - GRAN TIERRA ENERGY INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Gran Tierra Energy Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 38500T101 (CUSIP Number) December 31, 2019 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

January 31, 2020 EX-99.1

Gran Tierra Energy Inc. Announces 2019 Year-End Reserves and Operational Update

Exhibit 99.1 Gran Tierra Energy Inc. Announces 2019 Year-End Reserves and Operational Update • Achieved 200% 1P Reserves and 101% 2P Reserves Replacement • Added 25.3 MMBOE of 1P Reserves Primarily in the Company's Four Core Assets Under Waterflood • Increased 2P Net Asset Value per Share to $6.28 Before Tax and $4.54 After Tax CALGARY, Alberta – January 28, 2020 – Gran Tierra Energy Inc. ("Gran T

January 31, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 28, 2020 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissio

December 11, 2019 EX-10.1

Thirteenth Amendment to Credit Agreement, dated as of December 10, 2019, by and among Gran Tierra Energy Inc., Gran Tierra Energy International Holdings Ltd., the Bank of Nova Scotia and the lenders party thereto.

Exhibit 10.1 Execution Version THIRTEENTH AMENDMENT TO CREDIT AGREEMENT This Thirteenth Amendment to Credit Agreement (this “Amendment”) is entered into effective as of the 10th day of December, 2019, by and among Gran Tierra Energy International Holdings Ltd., an exempted company incorporated with limited liability under the laws of the Cayman Islands (the “Borrower”), Gran Tierra Energy Inc., a

December 11, 2019 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 10, 2019 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commissi

November 6, 2019 EX-99.1

Gran Tierra Energy Inc. Announces Third Quarter 2019 Results Substantial Completion of Major Capital Investments in Development Projects Shifting to Free Cash Flow with Sustainable Growth Positive Waterflood Response, Encouraging Results at Acordione

Gran Tierra Energy Inc. Announces Third Quarter 2019 Results Substantial Completion of Major Capital Investments in Development Projects Shifting to Free Cash Flow with Sustainable Growth Positive Waterflood Response, Encouraging Results at Acordionero CALGARY, ALBERTA, November 5, 2019, Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced

November 6, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 5, 2019 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ide

November 6, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN T

November 6, 2019 EX-10.1

Executive Employment Agreement, dated October 18, 2019, between Gran Tierra Energy Canada ULC and Gran Tierra Energy Inc. and Remi Anthony Berthelet.

EXHIBIT 10.1 EXECUTIVE EMPLOYMENT AGREEMENT BETWEEN: GRAN TIERRA ENERGY CANADA ULC, an Alberta corporation (“GTE ULC”) and GRAN TIERRA ENERGY INC., a Delaware corporation (“Gran Tierra”) (GTE ULC and Gran Tierra are collectively referred to herein as, the “Company”) - and - REMI ANTHONY BERTHELET, an individual ordinarily resident in Canmore in the Province of Alberta (the “Executive”) (GTE ULC, G

October 22, 2019 CORRESP

GTE / Gran Tierra Energy, Inc. CORRESP - -

October 22, 2019 Via EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Natural Resources 100 F Street, NE Washington, D.

October 3, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 3, 2019 GRAN TIERRA ENERGY INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-34018 98-0479924 (State or Other Jurisdiction of Incorporation) (Commission

October 3, 2019 EX-99.1

Gran Tierra Energy Inc. Announces Appointment of Chief Operating Officer

Gran Tierra Energy Inc. Announces Appointment of Chief Operating Officer CALGARY, ALBERTA, October 3, 2019, Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)(TSX:GTE)(LSE:GTE) is pleased to announce the appointment of Mr. Tony Berthelet as Chief Operating Officer ("COO"). Mr. Berthelet is a Professional Engineer with over 20 years of multi-disciplinary upstream oil and g

October 3, 2019 CORRESP

GTE / Gran Tierra Energy, Inc. CORRESP - -

CORRESP 1 filename1.htm October 3, 2019 Via EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Natural Resources 100 F Street, NE Washington, D.C. 20549-3561 Attn: Joseph Klinko Karl Hiller Re: Gran Tierra Energy Inc. Form 10-K for the Fiscal Year ended December 31, 2018 Filed February 27, 2019 Response Letter dated August 26, 2019 File No.: 001-34018

August 26, 2019 CORRESP

GTE / Gran Tierra Energy, Inc. CORRESP - -

CORRESP 1 filename1.htm August 26, 2019 Via EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Natural Resources 100 F Street, NE Washington, D.C. 20549-3561 Attn: Joseph Klinko Karl Hiller Re: Gran Tierra Energy Inc. Form 10-K for the Fiscal Year ended December 31, 2018 Filed February 27, 2019 File No.: 001-34018 Ladies and Gentlemen: This letter sets

August 8, 2019 EX-10.3

First Supplemental Indenture related to 6.25% Senior Notes due 2025, dated as of July 23, 2019, among Gran Tierra Energy Inc., the guarantors named therein, and U.S. Bank National Association.

EXHIBIT 10.3 GRAN TIERRA ENERGY INTERNATIONAL HOLDINGS LTD., as Issuer and the Note Guarantors named herein and U.S. Bank National Association, as Trustee, Security Registrar and Paying Agent $300,000,000 6.25% SENIOR NOTES DUE 2025 FIRST SUPPLEMENTAL INDENTURE Dated as of July 23, 2019 EXHIBIT 10.3 FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of July 23, 2019, among GRAN

August 8, 2019 EX-10.4

First Supplemental Indenture related to 7.750% Senior Notes due 2027, dated as of July 23, 2019, among Gran Tierra Energy Inc., the guarantors named therein, and U.S. Bank.

EXHIBIT 10.4 GRAN TIERRA ENERGY INC., as Issuer and the Note Guarantors named herein and U.S. Bank National Association, as Trustee, Security Registrar and Paying Agent $300,000,000 7.750% SENIOR NOTES DUE 2027 FIRST SUPPLEMENTAL INDENTURE Dated as of July 23, 2019 FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of July 23, 2019, among GRAN TIERRA ENERGY INC., a Delaware cor

August 8, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-34018 GRAN TIERRA

August 7, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2019 GRAN TIERRA ENERGY INC. (Exact name of Registrant as specified in its charter) Delaware 98-0479924 (State or other jurisdiction of incorporation) (I.R.S. Employer Ident

August 7, 2019 EX-99.1

Gran Tierra Energy Inc. Announces Second Quarter 2019 Results Highlighted by $39 Million of Net Income and Success in New Zone at Acordionero

Gran Tierra Energy Inc. Announces Second Quarter 2019 Results Highlighted by $39 Million of Net Income and Success in New Zone at Acordionero CALGARY, ALBERTA, August 7, 2019, Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced the Company's financial and operating results for the quarter ended June 30, 2019 ("the Quarter"). All dollar amo

August 7, 2019 CORRESP

GTE / Gran Tierra Energy, Inc. CORRESP - -

Hillary H. Holmes Direct: +1 346.718.6602 Fax: +1 346.718.6902 [email protected] August 7, 2019 Via EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Natural Resources 100 F Street, NE Washington, D.C. 20549-3561 Attn: Joseph Klinko Karl Hiller RE: Gran Tierra Energy Inc. Form 10-K for the Fiscal Year ended December 31, 2018 Filed February 27, 20

July 12, 2019 SC TO-I/A

GTE / Gran Tierra Energy, Inc. SC TO-I/A - - SC TO-I/A

SC TO-I/A 1 tv525140sctoi-a.htm SC TO-I/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 1) Tender Offer Statement under Section 14(d)(1) or Section 13(e)(1) of the Securities Exchange Act of 1934 GRAN TIERRA ENERGY INC. (Name of Subject Company and Filing Person (Issuer) and Name of Filing Person (Offeror)) 5.00% Convertible Senior Notes due 202

July 12, 2019 EX-99.(A)(5)(B)

Gran Tierra Energy Inc. Announces Results of Offer to Purchase all of its Issued and Outstanding 5.00% Convertible Senior Notes due 2021

Exhibit (a)(5)(B) Gran Tierra Energy Inc. Announces Results of Offer to Purchase all of its Issued and Outstanding 5.00% Convertible Senior Notes due 2021 CALGARY, Alberta, July 12, 2019, Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American: GTE)(TSX:GTE)(LSE:GTE) today announced the final results of its previously announced issuer bid (the “Offer”) to purchase for cancellation

June 5, 2019 EX-99.(D)(8)

Agreement between the Company and Verition Canada Master Fund Ltd., dated as of June 3, 2019, to tender an aggregate of approximately $18,837,000 principal amount of Convertible Notes pursuant to the Offer.

Exhibit (d)(8) Lock-Up Email Agreement Verition Advisors (Canada) ULC Further to our previous correspondence, Gran Tierra Energy Inc.

June 5, 2019 EX-99.(D)(4)

Agreement between the Company and Crown Managed Accounts SPC (acting for and on behalf of Crown/Polar Segregated Portfolio), dated as of June 4, 2019, to tender an aggregate of approximately $899,000 principal amount of Convertible Notes pursuant to the Offer.

Exhibit (d)(4) Lock-Up Email Agreement Crown Managed Accounts SPC acting for and on behalf of Crown/Polar Segregated Portfolio Further to our previous correspondence, Gran Tierra Energy Inc.

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