AVA / Avista Corporation - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Avista Corporation
US ˙ NYSE ˙ US05379B1070

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LEI Q0IK63NITJD6RJ47SW96
CIK 104918
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 Avista Corporation
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 8, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 AVISTA CORP Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Equity Common Stock 457(a) 5,500,000 $ 37.

August 8, 2025 424B5

AVISTA CORPORATION At-the-Market Offering Common Stock

424B5 Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-287023 PROSPECTUS SUPPLEMENT (To Prospectus dated May 7, 2025) AVISTA CORPORATION At-the-Market Offering Common Stock We may offer and sell shares of our common stock through one or more of the sales agents named in this prospectus supplement, over a period of time and from time to time in transactions at the market pric

August 6, 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 1-3701 AVISTA CORPORA

August 6, 2025 EX-99.1

Second Quarter

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 [email protected] Investors: Stacey Walters (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the Second Quarter of 2025, Confirms 2025 Earnings Guidance with Strong Utility Offsetting Investment Losses SPOKANE, Wash. – Aug. 6, 2025, 4:05 a.m. PDT: Avista

August 6, 2025 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 August 5, 2025 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated August 5, 2025, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended June 30, 2025, is incorporated by reference in Registration Statement Nos.

August 6, 2025 8-K

FORM 8-K Item 2.02 Results of Operations and Financial Condition. Item 9.01 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 06, 2025 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

July 25, 2025 8-K

FORM 8-K Section 1 - Registrant's Business and Operations Item 1.01 Entry into a Material Definitive Agreement. Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. Section 9 Fin

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 23, 2025 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

July 25, 2025 EX-4.1

Sixty-ninth Supplemental Indenture to the Mortgage dated as of July 1, 2025

EXHIBIT 4.1 AVISTA CORPORATION TO CITIBANK, N.A. As Successor Trustee under Mortgage and Deed of Trust, dated as of June 1, 1939 Sixty-ninth Supplemental Indenture Providing among other things for a series of bonds designated "First Mortgage Bonds, 6.18% Series due 2055" Due July 1, 2055 and for certain amendments to such Mortgage and Deed of Trust Dated as of July 1, 2025 SIXTY-NINTH SUPPLEMENTAL

June 23, 2025 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One)  ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2024 or  TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 1-3701 THE INVESTMENT AND EMPLOYEE STOCK OWNERSHIP

June 11, 2025 8-K

FORM 8-K Section 8 - Other Events Item 8.01 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 09, 2025 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

May 13, 2025 8-K

FORM 8-K Item 5.07 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 08, 2025 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

May 7, 2025 EX-5.(A)

Opinion and Consent of Gregory C. Hesler, Esq.

EX-5.(a) Exhibit 5(a) May 7, 2025 Avista Corporation 1411 East Mission Avenue Spokane, Washington 99202 Re: Registration Statement on Form S-3 Ladies and Gentlemen: I am a Senior Vice President, the General Counsel, the Corporate Secretary and the Chief Ethics/Compliance Officer of Avista Corporation, a Washington corporation (the “Company”), and, together with Bracewell LLP, am acting as counsel

May 7, 2025 EX-4

Description of Common Stock (1)

EXHIBIT 4 AVISTA CORPORATION DESCRIPTION OF COMMON STOCK (Registered Under Section 12(b) of the Securities Exchange Act of 1934) General The authorized capital stock of Avista, as set forth in its Restated Articles of Incorporation (the “Articles”), consists of 10,000,000 shares of Preferred Stock, cumulative, without nominal or par value (“Preferred Stock”), which is issuable in series, and 200,000,000 shares of Common Stock without nominal or par value (“Common Stock”).

May 7, 2025 EX-99.1

Net Income (a)

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 [email protected] Investors: Stacey Walters (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the First Quarter of 2025, Confirms 2025 Earnings Guidance SPOKANE, Wash. – May 7, 2025, 4:05 a.m. PDT: Avista Corp. (NYSE: AVA) today announced financial result

May 7, 2025 424B5

AVISTA CORPORATION At-the-Market Offering Common Stock

Filed pursuant to Rule 424(b)(5) Registration No. 333-287023 PROSPECTUS SUPPLEMENT (To Prospectus dated May 7, 2025) AVISTA CORPORATION At-the-Market Offering Common Stock We may offer and sell shares of our common stock through one or more of the sales agents named in this prospectus supplement, over a period of time and from time to time in transactions at the market prices prevailing at the tim

May 7, 2025 EX-23.(C)

Consent of Deloitte & Touche LLP.

EX-23.(c) Exhibit 23(c) CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in this Registration Statement on Form S-3 of our reports dated February 25, 2025, relating to the financial statements of Avista Corporation and the effectiveness of Avista Corporation’s internal control over financial reporting, appearing in the Annual Report on Form 10-K

May 7, 2025 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 May 6, 2025 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated May 6, 2025, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended March 31, 2025, is incorporated by reference in Registration Statement Nos.

May 7, 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 1-3701 AVISTA CORPOR

May 7, 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 07, 2025 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

May 7, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-3 (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type (1) Security Class Title (1) Fee Calculation or Carry Forward Rule (2) Amount Registered (2) Proposed Maximum  Offering Price Per Unit (2) Maximum Aggregate  Offering Price (2) Fee Rate  (2) A

May 7, 2025 EX-15

Awareness Letter of Deloitte & Touche LLP.

EX-15 Exhibit 15 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated May 6, 2025, on our review of financial information of Avista Corporation appearing in Avista Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2025, is incorporated by reference in this Registration Statement.

May 7, 2025 S-3ASR

As filed with the Securities and Exchange Commission on May 7, 2025

S-3ASR As filed with the Securities and Exchange Commission on May 7, 2025 Registration No.

May 7, 2025 EX-5.(B)

Opinion and Consent of Bracewell LLP.

EX-5.(b) Exhibit 5(b) May 7, 2025 Avista Corporation 1411 East Mission Avenue Spokane, Washington 99202 Re: Registration Statement on Form S-3 Ladies and Gentlemen: We, together with Gregory C. Hesler, Esq., a Senior Vice President, the General Counsel, the Corporate Secretary and the Chief Ethics/Compliance Officer of Avista Corporation, a Washington corporation (the “Company”), are acting as cou

May 7, 2025 EX-FILING FEES

Calculation of Filing Fee Table PROSPECTUS (424(b)(5)) FORM S-3 (No. 333-287023) (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 Calculation of Filing Fee Table PROSPECTUS (424(b)(5)) under FORM S-3 (No.

March 26, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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 Ru

March 26, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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      

February 26, 2025 EX-99.1

Fourth Quarter

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports 2024 Results and Initiates 2025 Earnings Guidance • Consolidated earnings per diluted share of $2.29 for the full year of 2024 • Initiated consolidated guidance of $2.52 to $2.72 per share

February 26, 2025 EX-10.24

Avista Corporation Performance Award Agreement 2024. (3)

Exhibit 10.24 AVISTA CORPORATION PERFORMANCE AWARD AGREEMENT This Performance Award Agreement (the “Agreement”) is made by and between Avista Corporation, a Washington Corporation (the “Company”) and the individual named in section 1 (the “Participant”) as designated by the Avista Corporation Compensation and Organization Committee (the “Plan Administrator”). WHEREAS, Performance Awards are grante

February 26, 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

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, 2025 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

February 26, 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 001-03701 AVISTA CORPORAT

February 26, 2025 EX-10.27

Avista Corporation Non-Employee Director Compensation.

Exhibit 10.27 Avista Corporation Non-Employee Director Compensation - 2024 The Board of Directors (Board) of Avista Corporation (Avista Corp. or the Company) regularly reviews director compensation with the assistance of an outside advisor to determine whether it is appropriate and competitive in light of market circumstances and prevailing best practices for corporate governance for the energy/ut

February 26, 2025 EX-21

Subsidiaries of Registrant.

Exhibit 21 AVISTA CORPORATION SUBSIDIARIES OF REGISTRANT Subsidiary State or Country of Incorporation Avista Capital, Inc.

February 26, 2025 EX-4.76

Waiver of redemption right under Section 8.01 of the Loan Agreement between City of Forsyth, Montana and Avista Corporation $17,000,000 City of Forsyth, Montana Pollution Control Revenue Refunding Bonds (Avista Corporation Colstrip Project) Series 2010A

Exhibit 4.76 March 7, 2024 The Bank of New York Mellon Trust Company, N.A., as trustee 101 2nd Street, Suite 2400 San Francisco, CA 94105 Re: $17,000,000 City of Forsyth, Montana Pollution Control Revenue Refunding Bonds (Avista Corporation Colstrip Project) Series 2010B Ladies and Gentlemen: We refer to the Trust Indenture, dated as of December 1, 2010 (the “Indenture”), between the City of Forsy

February 26, 2025 EX-19

Insider Trading Policy

Exhibit 19 Insider Trading Policy Policy Avista’s Insider Trading Policy (“Policy”) applies to our Directors, Executive Officers, employees, and consultants with respect to the trading of Avista securities, as well as the securities of publicly traded companies with whom we have a business relationship.

February 26, 2025 EX-4.73

March 7, 2024

Exhibit 4.73 March 7, 2024 The Bank of New York Mellon Trust Company, N.A., as trustee 101 2nd Street, Suite 2400 San Francisco, CA 94105 Re: $66,700,000 City of Forsyth, Montana Pollution Control Revenue Refunding Bonds (Avista Corporation Colstrip Project) Series 2010A Ladies and Gentlemen: We refer to the Trust Indenture, dated as of December 1, 2010 (the “Indenture”), between the City of Forsy

February 26, 2025 EX-10.25

Avista Corporation Officer Incentive Plan. (3)

Exhibit 10.25 2024 SENIOR LEADER ANNUAL CASH INCENTIVE PLAN PLAN PROVISIONS Approved by Board Purpose: The Senior Leader Annual Cash Incentive Plan (Plan) is designed to align the interests of our senior leaders with both shareholder and customer interests to achieve overall positive financial and operational performance for the Company. The Plan is an important element of the overall compensation

February 6, 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

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 31, 2025 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission F

December 26, 2024 8-K

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): December 20, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

November 6, 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 1-3701 AVISTA CO

November 6, 2024 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 November 5, 2024 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated November 5, 2024, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended September 30, 2024, is incorporated by reference in Registration Statement Nos.

November 6, 2024 EX-99.1

Third Quarter

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the Third Quarter of 2024 • Quarterly results demonstrate continued improvement at core utility from 2023 • Expect to be at the low end of Avista Utilities guidance ra

November 6, 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): November 06, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

August 26, 2024 EX-99.1

Media: Lena Funston (509) 495-8090

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista CEO Dennis Vermillion Announces Retirement Heather Rosentrater is named the first female CEO in the Company’s history. SPOKANE, Wash. – August 26, 2024, 1:05 p.m. PDT: Avista Corp. (NYSE: AVA) Chief Exec

August 26, 2024 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): August 22, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

August 7, 2024 EX-99.1

Second Quarter

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the Second Quarter of 2024 • Year-to-date consolidated earnings reflect strength of core utility operations • Confirming consolidated earnings guidance of $2.36 to $2.

August 7, 2024 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 August 6, 2024 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated August 6, 2024, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended June 30, 2024, is incorporated by reference in Registration Statement Nos.

August 7, 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

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 07, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

August 7, 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 1-3701 AVISTA CORPORA

June 26, 2024 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One)  ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2023 or  TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 1-3701 THE INVESTMENT AND EMPLOYEE STOCK OWNERSHIP

May 7, 2024 EX-FILING FEES

Calculation of Filing Fee Table PROSPECTUS (424(b)(5)) FORM S-3 (No. 333-264790) (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class

EX-FILING FEES Exhibit 107 (Prospectus for Common Stock) Calculation of Filing Fee Table PROSPECTUS (424(b)(5)) under FORM S-3 (No.

May 7, 2024 424B5

AVISTA CORPORATION At-the-Market Offering Common Stock

Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-264790 PROSPECTUS SUPPLEMENT (To Prospectus dated May 9, 2022) AVISTA CORPORATION At-the-Market Offering Common Stock We may offer and sell shares of our common stock through one or more of the sales agents named in this prospectus supplement, over a period of time and from time to time in transactions at the market prices pre

May 7, 2024 EX-5.(C)

Opinion and Consent of Gregory C. Hesler, Esq.

Exhibit 5(c) May 7, 2024 Avista Corporation 1411 East Mission Avenue Spokane, Washington 99202 Re: Registration Statement on Form S-3 Ladies and Gentlemen: I am a Senior Vice President, the General Counsel, the Corporate Secretary and the Chief Ethics/Compliance Officer of Avista Corporation, a Washington corporation (the “Company”), and, together with Bracewell LLP, am acting as counsel to the Company in connection with the Registration Statement on Form S-3 (File No.

May 7, 2024 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 07, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

May 7, 2024 EX-1.(G)

Sales Agency Agreement dated May 7, 2024 between Avista Corp. and KeyBanc Capital Markets Inc.

Exhibit 1(g) AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: May 7, 2024 [table of contents] SECTION 1.

May 7, 2024 EX-1.(E)

Sales Agency Agreement dated May 7, 2024 between Avista Corp. and BofA Securities, Inc.

Exhibit 1(e) AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: May 7, 2024 [table of contents] SECTION 1.

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 01, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

May 7, 2024 EX-1.(F)

Sales Agency Agreement dated May 7, 2024 between Avista Corp. and J.P. Morgan Securities LLC

Exhibit 1(f) AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: May 7, 2024 [table of contents] SECTION 1.

May 7, 2024 EX-5.(D)

Opinion and Consent of Bracewell LLP

Exhibit 5(d) May 7, 2024 Avista Corporation 1411 East Mission Avenue Spokane, Washington 99202 Re: Registration Statement on Form S-3 Ladies and Gentlemen: We, together with Gregory C.

May 7, 2024 EX-1.(H)

Sales Agency Agreement dated May 7, 2024 between Avista Corp. and MUFG Securities Americas Inc.

Exhibit 1(h) AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: May 7, 2024 [table of contents] SECTION 1.

May 1, 2024 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 April 30, 2024 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated April 30, 2024, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended March 31, 2024, is incorporated by reference in Registration Statement Nos.

May 1, 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 01, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

May 1, 2024 EX-99.1

Operating Revenues

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the First Quarter of 2024, Confirms 2024 Earnings Guidance • First quarter consolidated earnings per diluted share of $0.91, in line with expectations • Confirms conso

May 1, 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 1-3701 AVISTA CORPOR

April 3, 2024 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): April 01, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fil

March 20, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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      

March 20, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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 Ru

February 21, 2024 EX-10.25

Avista Corporation Officer Incentive Plan. (3)

Exhibit 10.25 2023 EXECUTIVE OFFICER ANNUAL CASH INCENTIVE PLAN PLAN PROVISIONS Approved by Board Purpose: The Executive Officer Annual Cash Incentive Plan (Plan) is designed to align the interests of our NEOs and senior management with both shareholder and customer interests to achieve overall positive financial and operational performance for the Company. The Plan is an important element of the

February 21, 2024 EX-97

Avista Corporation Dodd-Frank Recovery Policy

Exhibit 97 AVISTA CORPORATION Dodd-Frank Recovery Policy As Adopted August 3, 2023 1.

February 21, 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

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, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

February 21, 2024 EX-10.24

Avista Corporation Performance Award Agreement 2023. (3)

Exhibit 10.24 AVISTA CORPORATION PERFORMANCE AWARD AGREEMENT This Performance Award Agreement (the “Agreement”) is made by and between Avista Corporation, a Washington Corporation (the “Company”) and the individual named in section 1 (the “Participant”) as designated by the Avista Corporation Compensation and Organization Committee (the “Plan Administrator”). WHEREAS, Performance Awards are grante

February 21, 2024 EX-10.26

Employment Agreement between the Company and Wayne O. Manuel in the form of a Letter of Employment. (3)

Exhibit 10.26 3/16/2023 Dear Wayne: We are pleased to extend a conditional offer of employment to you as Vice President, Chief Information Officer & Chief Security Officer in our Executive Department. This offer is conditioned on your successful completion of a background check and drug test and on Avista board approval. Key elements of our offer are as follows:  Your anticipated starting date wi

February 21, 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 001-03701 AVISTA CORPORAT

February 21, 2024 EX-10.29

Avista Corporation Non-Employee Director Compensation.

Exhibit 10.29 Avista Corporation Non-Employee Director Compensation - 2023 The Board of Directors (Board) of Avista Corporation (Avista Corp. or the Company) regularly reviews director compensation with the assistance of an outside advisor to determine whether it is appropriate and competitive in light of market circumstances and prevailing best practices for corporate governance for the energy/ut

February 21, 2024 EX-21

Subsidiaries of Registrant.

Exhibit 21 AVISTA CORPORATION SUBSIDIARIES OF REGISTRANT Subsidiary State or Country of Incorporation Avista Capital, Inc.

February 21, 2024 EX-99.1

Fourth Quarter

Exhibit 99.1 Contact: Media: Lena Funston (509) 495-8090 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Announces 2023 Results and Initiates 2024 Earnings Guidance • 2023 consolidated earnings per diluted share of $2.24 • Significant improvement in Avista Utilities earnings reflects the benefits of c

February 13, 2024 SC 13G/A

AVA / Avista Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0022-avistacorp.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 14)* Name of issuer: Avista Corp Title of Class of Securities: Common Stock CUSIP Number: 05379B107 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pu

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

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, 2024 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission F

December 1, 2023 8-K

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 29, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

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

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 01, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

November 1, 2023 EX-99.1

Third Quarter

Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the Third Quarter of 2023 SPOKANE, Wash. – Nov. 1, 2023, 4:05 a.m. PDT: Avista Corp. (NYSE: AVA) today reported net income of $14.7 million, or earnings of $0.19 per dil

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 1-3701 AVISTA CO

November 1, 2023 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 October 31, 2023 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated October 31, 2023, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended September 30, 2023, is incorporated by reference in Registration Statement Nos.

September 7, 2023 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 07, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

September 7, 2023 EX-99.1

Avista 24/7 Media Line (509) 495-4174

Exhibit 99.1 Contact: Avista 24/7 Media Line (509) 495-4174 Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista Corp. Names New President and Announces Senior Leadership Changes SPOKANE, Wash. – Sept. 7, 2023, 1:05 p.m. PDT: Avista Corp. (NYSE: AVA) announced that Senior Vice President and Chief Operating Officer Heat

August 21, 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

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, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

August 8, 2023 8-K

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): August 03, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

August 2, 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 1-3701 AVISTA CORPORA

August 2, 2023 EX-FILING FEES

Calculation of Filing Fee Table PROSPECTUS (424(b)(5)) FORM S-3 (No. 333 264790) (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 (Prospectus for Common Stock) Calculation of Filing Fee Table PROSPECTUS (424(b)(5)) under FORM S-3 (No.

August 2, 2023 EX-99.1

Second Quarter

Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the Second Quarter of 2023 SPOKANE, Wash. – Aug. 2, 2023, 4:05 a.m. PDT: Avista Corp. (NYSE: AVA) today reported net income of $17.5 million, or earnings of $0.23 per di

August 2, 2023 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 August 1, 2023 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated August 1, 2023, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended June 30, 2023, is incorporated by reference in Registration Statement Nos.

August 2, 2023 424B5

AVISTA CORPORATION At-the-Market Offering Common Stock

Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-264790 PROSPECTUS SUPPLEMENT (To Prospectus dated May 9, 2022) AVISTA CORPORATION At-the-Market Offering Common Stock We may offer and sell shares of our common stock through one or more of the sales agents named in this prospectus supplement, over a period of time and from time to time in transactions at the market prices pre

August 2, 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 02, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

June 27, 2023 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One)  ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2022 or  TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 1-3701 THE INVESTMENT AND EMPLOYEE STOCK OWNERSHIP

June 16, 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

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 14, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

June 12, 2023 EX-10.1

Fifth Amendment to Credit Agreement, dated as of June 8, 2023, among Avista Corporation, the lending financial institutions, U.S. Bank National Corporation and Wells Fargo Bank National Association as issuing banks, and MUFG Bank, LTD as Administrative Agent

Exhibit 10.1 FIFTH AMENDMENT TO CREDIT AGREEMENT This FIFTH AMENDMENT TO CREDIT AGREEMENT (this “Amendment”), dated as of June 8, 2023, is entered into by AVISTA CORPORATION, a Washington corporation (the “Borrower”), the financial institutions identified on the signature pages hereof as “Lenders” (the “Lenders”), U.S. BANK NATIONAL ASSOCIATION, as an Issuing Bank, WELLS FARGO BANK, NATIONAL ASSOC

June 12, 2023 EX-10.2

Bond Delivery Agreement, dated as of June 8, 2023, between Avista Corporation and Union Bank, N.A.

Exhibit 10.2 Bond Delivery Agreement AVISTA CORPORATION to MUFG BANK, LTD., as Administrative Agent Dated as of June 8, 2023 Relating to First Mortgage Bonds, Collateral Series 2023A THIS BOND DELIVERY AGREEMENT, dated as of June 8, 2023 (this “Agreement”), is entered into between AVISTA CORPORATION, a Washington corporation (the “Company”), and MUFG BANK, LTD. (as successor by appointment to MUFG

June 12, 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

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 08, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

June 12, 2023 EX-4.1

Sixty-Eighth Supplemental Indenture, dated as of June 1, 2023

Exhibit 4.1 AVISTA CORPORATION TO CITIBANK, N.A. As Successor Trustee under Mortgage and Deed of Trust, dated as of June 1, 1939 Sixty-eighth Supplemental Indenture Providing among other things for a series of bonds designated "First Mortgage Bonds, Collateral Series 2023A" Due June 8, 2028 Dated as of June 1, 2023 SIXTY-EIGHTH SUPPLEMENTAL INDENTURE THIS INDENTURE, dated as of the 1st day of June

May 17, 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

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 11, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

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 1-3701 AVISTA CORPOR

May 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

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 02, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

May 3, 2023 EX-99

Avista 24/7 Media Line (509) 495-4174

Exhibit 99.2 Contact: Avista 24/7 Media Line (509) 495-4174 Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista Corp. Names Kevin Christie Chief Financial Officer as Mark Thies Announces His Retirement SPOKANE, Wash. – May 3, 2023, 4:05 a.m. PDT: Avista Corp. (NYSE: AVA) announced that Senior Vice President of Externa

May 3, 2023 EX-99

Net Income (a)

Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the First Quarter of 2023, Confirms 2023 Guidance SPOKANE, Wash. – May 3, 2023, 4:10 a.m. PDT: Avista Corp. (NYSE: AVA) today reported net income of $54.8 million, or ea

May 3, 2023 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 May 2, 2023 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated May 2, 2023, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended March 31, 2023, is incorporated by reference in Registration Statement Nos.

March 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

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): March 29, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fil

March 31, 2023 EX-4

Sixty-Seventh Supplemental Indenture, dated as of March 1, 2023

Exhibit 4.1 AVISTA CORPORATION TO CITIBANK, N.A. As Successor Trustee under Mortgage and Deed of Trust, dated as of June 1, 1939 Sixty-seventh Supplemental Indenture Providing among other things for a series of bonds designated "First Mortgage Bonds, 5.66% Series due 2053" Due April 1, 2053 Dated as of March 1, 2023 SIXTY-SEVENTH SUPPLEMENTAL INDENTURE THIS INDENTURE, dated as of the 1st day of Ma

March 28, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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 28, 2023 DEFA14A

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

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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

March 6, 2023 8-K

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): March 01, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fil

February 22, 2023 EX-99

Fourth Quarter

Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the Fourth Quarter and Fiscal Year 2022, Confirms 2023 Guidance SPOKANE, Wash. – Feb. 22, 2023, 4:05 a.m. PDT: Avista Corp. (NYSE: AVA) today reported net income of $155

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

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, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

February 22, 2023 EX-10

Avista Corporation Non-Employee Director Compensation.

Exhibit 10.26 Avista Corporation Non-Employee Director Compensation - 2022 The Board of Directors (Board) of Avista Corporation (Avista Corp. or the Company) regularly reviews director compensation with the assistance of an outside advisor to determine whether it is appropriate and competitive in light of market circumstances and prevailing best practices for corporate governance for the energy/ut

February 22, 2023 EX-4

Description of the Registrant's Securities registered under Section 12 of the Securities Exchange Act of 1934.

Exhibit 4.76 AVISTA CORPORATION DESCRIPTION OF COMMON STOCK (Registered under Section 12(b) of the Securities Exchange Act of 1934, as amended) General The authorized capital stock of Avista, as set forth in its Restated Articles of Incorporation (the “Articles”), consists of 10,000,000 shares of Preferred Stock, cumulative, without nominal or par value (the “Preferred Stock”), which is issuable i

February 22, 2023 EX-21

Subsidiaries of Registrant.

Exhibit 21 AVISTA CORPORATION SUBSIDIARIES OF REGISTRANT Subsidiary State or Country of Incorporation Avista Capital, Inc.

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 001-03701 AVISTA CORPORAT

February 22, 2023 EX-10

Avista Corporation Officer Incentive Plan. (3)

Exhibit 10.23 2022 EXECUTIVE OFFICER ANNUAL CASH INCENTIVE PLAN PLAN PROVISIONS Approved by Board Purpose: The Executive Officer Annual Cash Incentive Plan (Plan) is designed to align the interests of our NEOs and senior management with both shareholder and customer interests to achieve overall positive financial and operational performance for the Company. The Plan is an important element of the

February 22, 2023 EX-10

Avista Corporation Performance Award Agreement 2022. (3)

Exhibit 10.22 AVISTA CORPORATION PERFORMANCE AWARD AGREEMENT This Performance Award Agreement (the “Agreement”) is made by and between Avista Corporation, a Washington Corporation (the “Company”) and the individual named in section 1 (the “Participant”) as designated by the Avista Corporation Compensation and Organization Committee (the “Plan Administrator”). WHEREAS, Performance Awards are grante

February 9, 2023 SC 13G/A

AVA / Avista Corp / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 13)* Name of issuer: Avista Corp. Title of Class of Securities: Common Stock CUSIP Number: 05379B107 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

February 6, 2023 8-K

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): January 30, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission F

January 17, 2023 8-K

Entry into a Material Definitive Agreement, 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): January 16, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission F

January 17, 2023 EX-2.1

Colstrip Units 3 & 4 Interests Abandonment and Acquisition Agreement, dated as of January 16, 2023, among Avista Corporation and NorthWestern Corporation.

Exhibit 2.1 Execution Version COLSTRIP UNITS 3&4 INTERESTS ABANDONMENT AND ACQUISITION AGREEMENT by and between AVISTA CORPORATION and NORTHWESTERN CORPORATION Dated as of January 16, 2023 TABLE OF CONTENTS Article 1 DEFINITIONS 1 Section 1.1 Certain Defined Terms 1 Section 1.2 Interpretation 11 Article 2 ABANDONMENT AND ACQUISITION OF THE COLSTRIP UNITS 3&4 INTERESTS 12 Section 2.1 Abandonment by

January 9, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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 04, 2023 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission F

January 5, 2023 EX-10.2

Incremental Commitment and Joinder Agreement, dated as of December 30, 2022, among Avista Corporation and U.S. Bank

Exhibit 10.2 INCREMENTAL COMMITMENT AND LENDER JOINDER AGREEMENT THIS INCREMENTAL COMMITMENT AND LENDER JOINDER AGREEMENT (this ?Agreement?), dated as of December 30, 2022 (the ?Incremental Closing Date?), is entered into by and among AVISTA CORPORATION, a Washington corporation (the ?Borrower?), COBANK, ACB, a federal chartered instrumentality of the United States (the ?Incremental Lender?) and U

January 5, 2023 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 29, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

January 5, 2023 EX-10.1

Continuing Letter of Credit Agreement dated as of December 29, 2022, among Avista Corporation and MUFG Bank Ltd., as Issuer.

EX-10.1 2 ava-ex101.htm EX-10.1 Exhibit 10.1 EXECUTION VERSION CONTINUING LETTER OF CREDIT AGREEMENT (FOR STANDBY LETTERS OF CREDIT) December 29, 2022 (Date) MUFG Bank, Ltd. 1251 Avenue of the Americas New York, New York 10020 To induce you, in your sole discretion from time to time, to issue one or more irrevocable letters of credit pursuant to the terms and conditions of this agreement (as amend

December 30, 2022 8-K

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): December 22, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

December 20, 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

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 14, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

December 20, 2022 EX-10.2

First Amendment, dated as of December 15, 2022, to the Credit Agreement dated as of November 29, 2022 among Avista Corporation and Keybank National Association, as Lender and Administrative Agent.

EX-10.2 3 ava-ex102.htm EX-10.2 Exhibit 10.2 EXECUTION VERSION FIRST AMENDMENT TO CREDIT AGREEMENT This FIRST AMENDMENT TO CREDIT AGREEMENT (this “Amendment”), dated as of December 15, 2022, is entered into by AVISTA CORPORATION, a Washington corporation (the “Borrower”), the financial institutions identified on the signature pages hereof as “Lenders” (the “Lenders”), and KEYBANK NATIONAL ASSOCIAT

December 20, 2022 EX-10.1

Credit Agreement dated as of December 14, 2022 among Avista Corporation and Keybank National Association, as Lender and Administrative Agent.

Exhibit 10.1 EXECUTION VERSION Deal CUSIP No. 05379AAE9 Term Credit Facility CUSIP No. 05379AAF6 TERM LOAN CREDIT AGREEMENT dated as of December 14, 2022 among AVISTA CORPORATION, as Borrower, THE LENDERS PARTY HERETO, U.S. BANK NATIONAL ASSOCIATION, as Administrative Agent, and U.S. BANK NATIONAL ASSOCIATION and MUFG BANK, LTD., as Joint Lead Arrangers and Joint Bookrunners TABLE OF CONTENTS Page

December 15, 2022 8-K

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): December 12, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

November 30, 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): November 29, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

November 30, 2022 EX-10.1

Credit Agreement dated as of November 29, 2022 among Avista Corporation and U.S. Bank, as Lender and Administrative Agent

EX-10.1 2 ava-ex101.htm EX-10.1 Exhibit 10.1 CREDIT AGREEMENT dated as of November 29, 2022 among AVISTA CORPORATION, as Borrower, THE LENDERS PARTY HERETO, and KEYBANK NATIONAL ASSOCIATION, as Administrative Agent TABLE OF CONTENTS Page Article I DEFINITIONS 1 Section 1.01 Defined Terms 1 Section 1.02 Terms Generally 19 Section 1.03 Divisions 20 Section 1.04 Rates 20 Article II THE CREDITS 21 Sec

November 1, 2022 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 October 31, 2022 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated October 31, 2022, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended September 30, 2022, is incorporated by reference in Registration Statement Nos.

November 1, 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): November 01, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

November 1, 2022 EX-99.1

Third Quarter

EX-99.1 2 ava-ex991.htm EX-99.1 Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the Third Quarter and Year-to-Date 2022, Lowers 2022 and 2023 Guidance SPOKANE, Wash. – Nov. 1, 2022, 4:05 a.m. PDT: Avista Corp. (NYSE:

November 1, 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 1-3701 AVISTA CO

August 10, 2022 EX-99.1

-2226-

Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510, [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Announces New Executive Appointments Management Changes Focused on Enhancing Strategic Execution and Effective Operations SPOKANE, Wash., Aug. 9, 2022, 1:05 p.m. PDT: Avista (NYSE: AVA) today announced se

August 10, 2022 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): August 09, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

August 3, 2022 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 August 2, 2022 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated August 2, 2022, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended June 30, 2022, is incorporated by reference in Registration Statement Nos.

August 3, 2022 EX-99.1

Second Quarter

Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for the Second Quarter and Year-to-Date 2022, Confirms 2022 and 2023 Consolidated Guidance, Revises 2022 Segment Guidance SPOKANE, Wash. – Aug. 3, 2022, 4:05 a.m. PDT: Avist

August 3, 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 1-3701 AVISTA CORPORA

August 3, 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 03, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

June 30, 2022 8-K

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 28, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

June 24, 2022 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 1-3701 THE INVESTMENT AND EMPLOYEE STOCK OWNERSHIP

May 18, 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 12, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

May 10, 2022 SC 13G/A

AVA / Avista Corp / PUBLIC SECTOR PENSION INVESTMENT BOARD - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO.

May 9, 2022 EX-FILING FEES

Calculation of Filing Fee Table FORM S-3 (No. 333—264790) (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type (1) Security Class Title Fee Calculat

EX-FILING FEES 2 d350038dexfilingfees.htm EX-FILING FEES Exhibit 107 (Prospectus for Common Stock) Calculation of Filing Fee Table PROSPECTUS under FORM S-3 (No. 333—264790) (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type (1) Security Class Title Fee Calculation or Carry Forward Rule Amount R

May 9, 2022 EX-1.H

Sales Agency Agreement dated as of August 6, 2021 between Avista Corporation and KeyBanc Capital Markets Inc.

EX-1.H 2 d625600dex1h.htm EX-1(H) Exhibit 1(h) AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: August 6, 2021 [TABLE OF CONTENTS] SECTION 1. Certain Definitions 1 SECTION 2. Representations and Warranties 5 (a) Representations and Warranties of the Company 5 (b) Officer’s Certificates 13 SECTION 3. Offers and Sales of Shares 13 (a) Initiation of Sales Effor

May 9, 2022 EX-15

Awareness Letter of Deloitte & Touche LLP.

Exhibit 15 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated May 3, 2022, on our review of financial information of Avista Corporation appearing in Avista Corporation?s Quarterly Report on Form 10-Q for the quarter ended March 31, 2022, is incorporated by reference in this Registration Statement.

May 9, 2022 424B5

4,772,375 Shares AVISTA CORPORATION Common Stock

Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-264790 PROSPECTUS SUPPLEMENT (To Prospectus dated May 9, 2022) 4,772,375 Shares AVISTA CORPORATION Common Stock We may offer and sell up to 4,772,375 shares of our common stock from time to time through the sales agents named below. We may offer and sell shares of our common stock through one or more of the sales agents named

May 9, 2022 EX-23.C

Consent of Deloitte & Touche LLP.

EX-23(C) Exhibit 23(c) CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in this Registration Statement on Form S-3 of our reports dated February 22, 2022, relating to the financial statements of Avista Corporation and the effectiveness of Avista Corporation’s internal control over financial reporting, appearing in the Annual Report on Form 10-K of Avista Corporation for the year ended December 31, 2021.

May 9, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 (S-3) Calculation of Filing Fee Table FORM S-3 (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type (1) Security Class Title (1) Fee Calculation or Carry Forward Rule (2) Amount Registered (2) Proposed Maximum Offering Price Per Unit (2) Maximum Aggregate Offering Price (2) Fee Rate (2

May 9, 2022 EX-5.B

Consent of Bracewell LLP (contained in Exhibit 5(b)).

Exhibit 5(b) [Letterhead of Bracewell LLP] May 9, 2022 Avista Corporation 1411 East Mission Avenue Spokane, Washington 99202 Re: Registration Statement on Form S-3 Ladies and Gentlemen: We, together with Gregory C.

May 9, 2022 EX-5.A

Consent of Gregory C. Hesler, Esq. (contained in Exhibit 5(a)).

Exhibit 5(a) [Letterhead of Gregory C. Hesler, Esq.] May 9, 2022 Avista Corporation 1411 East Mission Avenue Spokane, Washington 99202 Re: Registration Statement on Form S-3 Ladies and Gentlemen: I am a Vice President, the General Counsel, the Corporate Secretary and the Chief Ethics/Compliance Officer of Avista Corporation, a Washington corporation (the ?Company?), and, together with Bracewell LL

May 9, 2022 S-3ASR

As filed with the Securities and Exchange Commission on May 9, 2022

Table of Contents As filed with the Securities and Exchange Commission on May 9, 2022 Registration No.

May 4, 2022 EX-25.A

Statement of Eligibility under the Trust Indenture Act of Citbank, N.A., as trustee under the Mortgage and Deed of Trust, dated as of June 1, 1939, as amended and supplemented (1)(3)

Exhibit 25(a) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305 (b)(2) CITIBANK, N.A. (Exact name of Trustee as specified in its charter) A National Banking Association 13-52

May 4, 2022 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 May 3, 2022 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated May 3, 2022, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended March 31, 2022, is incorporated by reference in Registration Statement Nos.

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 1-3701 AVISTA CORPOR

May 4, 2022 EX-99.1

First Quarter

Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for First Quarter 2022, Confirms 2022 and 2023 Guidance SPOKANE, Wash. ? May 4, 2022, 4:05 a.m. PDT: Avista Corp. (NYSE: AVA) today reported net income of $71.6 million, or

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 04, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

March 31, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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

March 31, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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 10, 2022 424B2

$400,000,000 AVISTA CORPORATION First Mortgage Bonds, 4.00% Series due 2052

Table of Contents Filed pursuant to Rule 424(b)(2) Registration No. 333-231431 PROSPECTUS SUPPLEMENT (To Prospectus dated May 13, 2019) $400,000,000 AVISTA CORPORATION First Mortgage Bonds, 4.00% Series due 2052 Our First Mortgage Bonds, 4.00% Series due 2052 (the ?Offered Bonds?), constitute a series of our Bonds described in the accompanying prospectus. We will pay interest on the Offered Bonds

March 10, 2022 EX-FILING FEES

Calculation of Filing Fee Table (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly registered and Carry Forward Securities Newly Registered Securities Security Type Security Class Title Fee Calculatio

Exhibit 107 Calculation of Filing Fee Table 424B2 (Form Type) Avista Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly registered and Carry Forward Securities Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Fees to Be Paid Debt First Mortgage Bonds, 4.

March 9, 2022 EX-4.1

Sixty-Sixth Supplemental Indenture, dated as of March 1, 2022

Exhibit 4.1 AVISTA CORPORATION TO CITIBANK, N.A. As Successor Trustee under Mortgage and Deed of Trust, dated as of June 1, 1939 Sixty-sixth Supplemental Indenture Providing among other things for a series of bonds designated ?First Mortgage Bonds, 4.00% Series due 2052? Due March 1, 2052 Dated as of March 1, 2022 SIXTY-SIXTH SUPPLEMENTAL INDENTURE THIS INDENTURE, dated as of the 1st day of March,

March 9, 2022 EX-1.1

Underwriting Agreement dated March 8, 2022 between the Company and the underwriters named therein

Exhibit 1.1 Execution Version AVISTA CORPORATION (a Washington corporation) First Mortgage Bonds, 4.00% Series due 2052 UNDERWRITING AGREEMENT Dated: March 8, 2022 Table of Contents Page SECTION 1. Certain Definitions 2 SECTION 2. Representations and Warranties. 5 (a) Representations and Warranties of the Company. 5 (i) Compliance with Securities Law Requirements. 5 (ii) Incorporated Documents 6 (

March 9, 2022 EX-5.D

Opinion and Consent of Bracewell LLP

Exhibit 5(d) [letterhead of Bracewell LLP] March 8, 2022 Avista Corporation 1411 East Mission Avenue Spokane, Washington 99202 Re: Registration Statement on Form S-3 Ladies and Gentlemen: We, together with Gregory C.

March 9, 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): March 08, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fil

March 9, 2022 EX-5.C

Opinion and Consent of Gregory C. Hesler, Esq.

Exhibit 5(c) [letterhead of Gregory C. Hesler, Esq.] March 8, 2022 Avista Corporation 1411 East Mission Avenue Spokane, Washington 99202 Re: Registration Statement on Form S-3 Ladies and Gentlemen: I am a Vice President, the General Counsel, the Corporate Secretary and the Chief Ethics/Compliance Officer of Avista Corporation, a Washington corporation (the ?Company?), and, together with Bracewell

March 8, 2022 FWP

AVISTA CORPORATION First Mortgage Bonds, 4.00% Series due 2052 PRICING TERM SHEET Issuer: Avista Corporation Security: First Mortgage Bonds, 4.00% Series due 2052 Ratings (Moody’s/S&P)*: A3 (Moody’s), A- (S&P) Principal Amount: $400,000,000 Trade Dat

FWP Filed Pursuant to Rule 433 Registration No. 333-231431 March 8, 2022 AVISTA CORPORATION $400,000,000 First Mortgage Bonds, 4.00% Series due 2052 PRICING TERM SHEET Issuer: Avista Corporation Security: First Mortgage Bonds, 4.00% Series due 2052 Ratings (Moody’s/S&P)*: A3 (Moody’s), A- (S&P) Principal Amount: $400,000,000 Trade Date: March 8, 2022 Settlement Date**: March 17, 2022 (T+7) Maturit

March 8, 2022 424B3

Subject to Completion, Preliminary Prospectus Supplement dated March 8, 2022

Table of Contents The information contained in this preliminary prospectus supplement is not complete and may be changed.

February 23, 2022 EX-4.75

Description of the Registrant's Securities registered under Section 12 of the Securities Exchange Act of 1934.

Exhibit 4.75 AVISTA CORPORATION DESCRIPTION OF COMMON STOCK (Registered under Section 12(b) of the Securities Exchange Act of 1934, as amended) General The authorized capital stock of Avista, as set forth in its Restated Articles of Incorporation (the ?Articles?), consists of 10,000,000 shares of Preferred Stock, cumulative, without nominal or par value (the ?Preferred Stock?), which is issuable i

February 23, 2022 EX-99.1

Fourth Quarter

EX-99.1 2 ava-ex991.htm EX-99.1 Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for Fourth Quarter and Fiscal Year 2021, Confirms 2022 and 2023 Guidance SPOKANE, Wash. – Feb. 23, 2022, 4:05 a.m. PST: Avista Corp. (NYSE: A

February 23, 2022 EX-10.22

Avista Corporation Performance Award Agreement 2021. (3)

Exhibit 10.22 AVISTA CORPORATION PERFORMANCE AWARD AGREEMENT This Performance Award Agreement (the ?Agreement?) is made by and between Avista Corporation, a Washington Corporation (the ?Company?) and the individual named in section 1 (the ?Participant?) as designated by the Avista Corporation Compensation and Organization Committee (the ?Plan Administrator?). WHEREAS, Performance Awards are grante

February 23, 2022 EX-10.23

Avista Corporation Officer Incentive Plan. (3)

Exhibit 10.23 2021 EXECUTIVE OFFICER ANNUAL CASH INCENTIVE PLAN ? Revised February 2022 PLAN PROVISIONS Approved by Board Purpose: The Executive Officer Annual Cash Incentive Plan (Plan) is designed to align the interests of our NEOs and senior management with both shareholder and customer interests to achieve overall positive financial and operational performance for the Company. The Plan is an i

February 23, 2022 EX-21

Subsidiaries of Registrant.

Exhibit 21 AVISTA CORPORATION SUBSIDIARIES OF REGISTRANT Subsidiary State or Country of Incorporation Avista Capital, Inc.

February 23, 2022 EX-10.26

Avista Corporation Non-Employee Director Compensation.

Exhibit 10.26 Avista Corporation Non-Employee Director Compensation - 2021 The Board of Directors (Board) of Avista Corporation (Avista Corp. or the Company) regularly reviews director compensation with the assistance of an outside advisor to determine whether it is appropriate and competitive in light of market circumstances and prevailing best practices for corporate governance for the energy/ut

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 23, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

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 001-03701 AVISTA CORPORAT

February 14, 2022 SC 13G/A

AVA / Avista Corp / PUBLIC SECTOR PENSION INVESTMENT BOARD - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO.

February 9, 2022 SC 13G/A

AVA / Avista Corp / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)* Name of issuer: Avista Corp. Title of Class of Securities: Common Stock CUSIP Number: 05379B107 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Rule

January 25, 2022 8-K

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): January 21, 2022 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission F

November 3, 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 1-3701 AVISTA CO

November 3, 2021 EX-15

Letter Re: Unaudited Interim Financial Information (1)

EX-15 2 ava-ex15.htm EX-15 Exhibit 15 November 2, 2021 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated November 2, 2021, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended September 30, 2021, is

November 3, 2021 EX-99.1

Third Quarter

EX-99.1 2 ava-ex991.htm EX-99.1 Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: Stacey Wenz (509) 495-2046 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for Third Quarter and Year-to-Date 2021 and Confirms 2021 and 2023 Consolidated Guidance, Lowers 2022 Consolidated Guidance SPOKANE, Wash. –

November 3, 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): November 03, 2021 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

September 30, 2021 8-K

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): September 27, 2021 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

September 30, 2021 EX-4.1

Sixty-Fifth Supplemental Indenture, dated as of September 1, 2021

Exhibit 4.1 AVISTA CORPORATION TO CITIBANK, N.A. As Successor Trustee under Mortgage and Deed of Trust, dated as of June 1, 1939 Sixty-fifth Supplemental Indenture Providing among other things for a series of bonds designated ?First Mortgage Bonds, 2.90% Series due 2051? Due October 1, 2051 Dated as of September 1, 2021 SIXTY-FIFTH SUPPLEMENTAL INDENTURE THIS INDENTURE, dated as of the 1st day of

September 30, 2021 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): September 28, 2021 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission

August 11, 2021 EX-99.1

Avista 24/7 Media Access (509) 495-4174

Exhibit 99.1 Contact: Media: Avista 24/7 Media Access (509) 495-4174 Laurine Jue (509) 495-2510, [email protected] Investors: John Wilcox (509) 495-4171, [email protected] Major General (Retired) Julie Bentz Joins Avista Corp. Board of Directors as R. John Taylor Retires from Board SPOKANE, Wash. Aug. 11, 2021, 1:05pm PDT: Avista Corp. (NYSE: AVA) announced that Major General (Re

August 11, 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): August 05, 2021 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

August 6, 2021 424B5

3,935,611 Shares AVISTA CORPORATION Common Stock

Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-231431 With respect to 3,000,000 of the 3,965,611 shares of common stock of Avista Corporation offered by this prospectus supplement and the accompanying prospectus, a registration fee of $14,136.09, calculated in accordance with Rule 457(c) and (r), has been transmitted to the Securities and Exchange Commission. The proposed

August 4, 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): August 04, 2021 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission Fi

August 4, 2021 EX-99.1

Second Quarter

Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: John Wilcox (509) 495-4171 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for Second Quarter and Year-to-Date 2021, Confirms 2021 Consolidated Guidance, Lowers Avista Utilities Guidance for 2021 and 2022, and Confirms 2023 Consolidated Guidance SP

August 4, 2021 EX-15

Letter Re: Unaudited Interim Financial Information (1)

EX-15 2 ava-20210630ex15.htm EX-15 Exhibit 15 August 3, 2021 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated August 3, 2021, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended June 30, 2021, is i

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 1-3701 AVISTA CORPORA

June 23, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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, 2021 AVISTA CORPORATION (Exact name of Registrant as Specified in Its Charter) Washington 001-03701 91-0462470 (State or Other Jurisdiction of Incorporation) (Commission File

June 16, 2021 8-K

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 14, 2021 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file num

June 11, 2021 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2020 or ? TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 1-3701 THE INVESTMENT AND EMPLOYEE STOCK OWNERSHIP

June 8, 2021 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): June 4, 2021 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file numb

June 8, 2021 EX-10.1

Fourth Amendment to Credit Agreement, dated as of June 4, 2021, among Avista Corporation, various institutional lenders, U.S. Bank National Association as an Issuing Bank, Wells Fargo Bank, National Association as an Issuing Bank, and MUFG Union Bank, N.A. as an Administrative Agent and Issuing Bank.

EX-10.1 2 ava-ex10124.htm EX-10.1 Exhibit 10.1EXECUTION VERSION FOURTH AMENDMENT TO CREDIT AGREEMENT This FOURTH AMENDMENT TO CREDIT AGREEMENT (this “Amendment”), dated as of June 4, 2021, is entered into by AVISTA CORPORATION, a Washington corporation (the “Borrower”), the financial institutions identified on the signature pages hereof as “Lenders” (the “Lenders”), U.S. BANK NATIONAL ASSOCIATION,

May 18, 2021 8-K

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 14, 2021 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file numb

May 14, 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): May 11, 2021 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file numb

May 5, 2021 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 May 4, 2021 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated May 4, 2021, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended March 31, 2021, is incorporated by reference in Registration Statement Nos.

May 5, 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): May 5, 2021 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file numbe

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 1-3701 AVISTA CORPOR

May 5, 2021 EX-99.1

First Quarter

EX-99.1 2 ava-ex9916.htm EX-99.1 Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: John Wilcox (509) 495-4171 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for First Quarter 2021 and Confirms Earnings Guidance SPOKANE, Wash. – May 5, 2021, 4:05 a.m. PDT: Avista Corp. (NYSE: AVA) today reported n

March 31, 2021 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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

March 31, 2021 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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 10, 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): March 10, 2021 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file nu

March 10, 2021 EX-99.1

Avista 24/7 Media Access (509) 495-4174

Exhibit 99.1 Contact: Media:Avista 24/7 Media Access (509) 495-4174 Laurine Jue (509) 495-2510, [email protected] Investors:John Wilcox (509) 495-4171, [email protected] Sena Kwawu Nominated to Join Avista Corp. Board of Directors as Marc Racicot Retires from Board SPOKANE, Wash. March 10, 2021, 1:05pm PST: Avista Corp. (NYSE: AVA) announced that Sena Kwawu, age 52, has been nomi

February 24, 2021 EX-10.22

Avista Corporation Performance Award Agreement 2020. (3)

Exhibit 10.22 RRAVISTA CORPORATION PERFORMANCE AWARD AGREEMENT This Performance Award Agreement (the ?Agreement?) is made by and between Avista Corporation, a Washington Corporation (the ?Company?) and the individual named in section 1 (the ?Participant?) as designated by the Avista Corporation Compensation and Organization Committee (the ?Plan Administrator?). WHEREAS, Performance Awards are gran

February 24, 2021 EX-99.1

Fourth Quarter

EX-99.1 2 ava-ex9916.htm EX-99.1 Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: John Wilcox (509) 495-4171 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for Fourth Quarter and Fiscal Year 2020, Initiates 2021 to 2023 Earnings Guidance SPOKANE, Wash. – Feb. 24, 2021, 4:05 a.m. PST: Avista Corp

February 24, 2021 EX-10.25

Avista Corporation Non-Employee Director Compensation.

Exhibit 10.25 Avista Corporation Non-Employee Director Compensation - 2020 The Board of Directors (Board) of Avista Corporation (Avista Corp. or the Company) regularly reviews director compensation with the assistance of an outside advisor to determine whether it is appropriate and competitive in light of market circumstances and prevailing best practices for corporate governance for the energy/ut

February 24, 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 001-03701 AVISTA CORPORAT

February 24, 2021 EX-4.75

Description of the Registrant's Securities registered under Section 12 of the Securities Exchange Act of 1934.

Exhibit 4.75 DESCRIPTION OF COMMON STOCK (Registered under Section 12(b) of the Securities Exchange Act of 1934, as amended) General The authorized capital stock of Avista, as set forth in its Restated Articles of Incorporation (the ?Articles?), consists of 10,000,000 shares of Preferred Stock, cumulative, without nominal or par value (the ?Preferred Stock?), which is issuable in series, and 200,0

February 24, 2021 EX-21

Subsidiaries of Registrant.

Exhibit 21 AVISTA CORPORATION SUBSIDIARIES OF REGISTRANT Subsidiary State or Country of Incorporation Avista Capital, Inc.

February 24, 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 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file

February 12, 2021 SC 13G

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )1 Avista Corporation (Name of Issuer) Common Stock (Title of Class of Securities) (CUSIP Number) December 31, 2020 (Date of

SC 13G SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO.

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: Avista Corp. Title of Class of Securities: Common Stock CUSIP Number: 05379B107 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

February 3, 2021 8-K

Financial Statements and Exhibits, Other Events - 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, 2021 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file

November 4, 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): November 4, 2020 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file

November 4, 2020 EX-99.1

Third Quarter

EX-99.1 2 ava-ex9916.htm EX-99.1 Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: John Wilcox (509) 495-4171 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for Third Quarter and Year-to-Date 2020, and Confirms 2020 Earnings Guidance SPOKANE, Wash. – Nov. 4, 2020, 4:05 a.m. PDT: Avista Corp. (NYS

November 4, 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 1-3701 AVISTA CO

November 4, 2020 EX-15

Letter Re: Unaudited Interim Financial Information (1)

EX-15 2 ava-ex159.htm EX-15 Exhibit 15 November 3, 2020 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated November 3, 2020, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended September 30, 2020, is

October 2, 2020 EX-4.1

Sixty-Fourth Supplemental Indenture, dated as of September 1, 2020

Exhibit 4.1 #6150151AVISTA CORPORATION TO CITIBANK, N.A. As Successor Trustee under Mortgage and Deed of Trust, dated as of June 1, 1939 Sixty-fourth Supplemental Indenture Providing among other things for a series of bonds designated “First Mortgage Bonds, 3.07% Series due 2050” Due September 30, 2050 Dated as of September 1, 2020 SIXTY-FOURTH SUPPLEMENTAL INDENTURE THIS INDENTURE, dated as of th

October 2, 2020 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 - 8-K - DEBT ISSUANCE

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 30, 2020 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission fil

September 21, 2020 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 18, 2020 AVISTA CORPORAT

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 18, 2020 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission fil

August 5, 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): August 5, 2020 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file nu

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 1-3701 AVISTA CORPORA

August 5, 2020 EX-15

Letter Re: Unaudited Interim Financial Information (1)

Exhibit 15 August 4, 2020 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated August 4, 2020, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q for the quarter ended June 30, 2020, is incorporated by reference in Registration Statement Nos.

August 5, 2020 EX-99.1

Second Quarter

EX-99.1 2 ava-ex9916.htm EX-99.1 Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: John Wilcox (509) 495-4171 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for Second Quarter and Year-to-Date 2020, and Confirms 2020 Earnings Guidance SPOKANE, Wash. – Aug. 5, 2020, 4:05 a.m. PDT: Avista Corp. (NY

June 8, 2020 EX-10.2

Bond Delivery Agreement, dated as of June 4, 2020, between Avista Corporation and MUFG Union Bank, N.A.

Bond Delivery Agreement AVISTA CORPORATION to MUFG UNION BANK, N.A., as Administrative Agent Dated as of June 4, 2020 Relating to First Mortgage Bonds, Collateral Series 2020A 4845-8314-4892v.2 0088333-000202 THIS BOND DELIVERY AGREEMENT, dated as of June 4, 2020 (this “Agreement”), is entered into between AVISTA CORPORATION, a Washington corporation (the “Company”), and MUFG UNION BANK, N.A. (for

June 8, 2020 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): June 4, 2020 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file numb

June 8, 2020 EX-10.1

Third Amendment to Credit Agreement, dated as of June 4, 2020, among Avista Corporation, U.S. Bank National Association, as an Issuing Bank, Wells Fargo Bank, National Association, as an Issuing Bank, MUFG Union Bank, N.A. as Administrative Agent and an Issuing Bank, and the financial institutions identified hereof as Continuing Lenders and Exiting Lender.

EXECUTION VERSION THIRD AMENDMENT TO CREDIT AGREEMENT This THIRD AMENDMENT TO CREDIT AGREEMENT (this “Amendment”), dated as of June 4, 2020, is entered into by AVISTA CORPORATION, a Washington corporation (the “Borrower”), the financial institutions identified on the signature pages hereof as “Lenders” (the “Lenders”), U.

June 8, 2020 EX-4.1

Sixty-Third Supplemental Indenture, dated as of June 1, 2020

Execution Version AVISTA CORPORATION TO CITIBANK, N.A. As Successor Trustee under Mortgage and Deed of Trust, dated as of June 1, 1939 Sixty-third Supplemental Indenture Providing among other things for a series of bonds designated “First Mortgage Bonds, Collateral Series 2020A” Due April 18, 2022 Dated as of June 1, 2020 #6140741 SIXTY-THIRD SUPPLEMENTAL INDENTURE THIS INDENTURE, dated as of the

June 1, 2020 11-K

- 11-K

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2019 or ¨ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 1-3701 THE INVESTMENT AND EMPLOYEE STOCK OWNERSHIP

May 20, 2020 SD

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM SD Specialized Disclosure Report AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 1411 East Mission Avenue, Spokane, Washington 99202-2600 (Address

May 15, 2020 EX-99.1

Our Customers | Our People Perform | Invent 2020 AGA Financial Forum May 18-19, 2020 NYSE: AVA www.avistacorp.com Disclaimer All forward-looking statements in this presentation are based on underlying assumptions (many of which are based, in turn, up

EX-99.1 2 aga51820slides.htm Our Customers | Our People Perform | Invent 2020 AGA Financial Forum May 18-19, 2020 NYSE: AVA www.avistacorp.com Disclaimer All forward-looking statements in this presentation are based on underlying assumptions (many of which are based, in turn, upon further assumptions). These statements are subject to a variety of risks, uncertainties and other factors. Most of the

May 15, 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 11, 2020 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file numb

May 15, 2020 EX-1.1

Sales Agency Agreement dated as of May 14, 2020 between Avista Corporation and BofA Securities, Inc. (filed with Form 8-K dated May 15, 2020, 1.1)

EX-1.1 2 ex11bofasecuritiesinca.htm SALES AGENCY AGREEMENT BETWEEN AVISTA CORP AND BOFA SECURITIESINC Execution Version AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: May 14, 2020 #6171774 TABLE OF CONTENTS Page SECTION 1. Certain Definitions 1 SECTION 2. Representations and Warranties 5 (a) Representations and Warranties of the Company 5 (i) Compliance wi

May 15, 2020 EX-1.2

Sales Agency Agreement dated May 14, 2020 between Avista Corp. and Credit Suisse Securities (USA) LLC.

Execution Version AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: May 14, 2020 #6171777 TABLE OF CONTENTS Page SECTION 1.

May 15, 2020 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 14, 2020 AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commission file numb

May 15, 2020 EX-1.4

Sales Agency Agreement dated as of May 14, 2020 between Avista Corporation and MUFG Securities Americas Inc. (filed with Form 8-K dated May 15, 2020, 1.4)

Execution Version AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: May 14, 2020 #6171781 TABLE OF CONTENTS Page SECTION 1.

May 15, 2020 424B5

3,170,611 Shares AVISTA CORPORATION Common Stock

424B5 Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-231431 The 3,170,611 shares of common stock offered by this prospectus supplement and the accompanying prospectus represent the unsold portion of the 4,580,199 shares offered by the prospectus supplement, dated May 14, 2019, in connection with which a registration fee of $19,618.03 (gross) was paid. Accordingly, the regi

May 15, 2020 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): May 15, 2020 (May 18, 2020) AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commi

May 15, 2020 EX-1.3

Sales Agency Agreement dated as of May 14, 2020 between Avista Corporation and J.P. Morgan Securities LLC (filed with Form 8-K dated May 15, 2020, 1.3)

EX-1.3 4 ex13jpmorgansecurities.htm SALES AGENCY AGREEMENT BETWEEN AVISTA CORP AND J.P. MORGAN SECURITIES LLC Execution Version AVISTA CORPORATION (a Washington corporation) Common Stock SALES AGENCY AGREEMENT Dated: May 14, 2020 #6171779 TABLE OF CONTENTS Page SECTION 1. Certain Definitions 1 SECTION 2. Representations and Warranties 5 (a) Representations and Warranties of the Company 5 (i) Compl

May 8, 2020 EX-15

Letter Re: Unaudited Interim Financial Information (1)

EX-15 2 ava-20200331xex15.htm LETTER RE: UNAUDITED INTERIM FINANCIAL INFORMATION Exhibit 15 May 7, 2020 To the Board of Directors and Shareholders of Avista Corporation 1411 East Mission Ave Spokane, Washington 99202 We are aware that our report dated May 7, 2020, on our review of interim financial information of Avista Corporation and subsidiaries appearing in this Quarterly report on Form 10-Q f

May 8, 2020 EX-99.1

First Quarter

EX-99.1 2 ex991q12020earningspre.htm PRESS RELEASE Exhibit 99.1 Contact: Media: Laurine Jue (509) 495-2510 [email protected] Investors: John Wilcox (509) 495-4171 [email protected] Avista 24/7 Media Access (509) 495-4174 Avista Corp. Reports Financial Results for First Quarter 2020, and Revises 2020 Earnings Guidance SPOKANE, Wash. – May 8, 2020, 4:05 a.m. PDT: Avista Corp. (NYSE

May 8, 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): May 7, 2020 (May 8, 2020) AVISTA CORPORATION (Exact name of registrant as specified in its charter) Washington 1-3701 91-0462470 (State of other jurisdiction of incorporation) (Commiss

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