CLH / Clean Harbors, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Clean Harbors Announces Second-Quarter 2025 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Second-Quarter 2025 Financial Results •Reports Revenue of $1.55 Billion with Growth in Environmental Services •Delivers Strong Incineration Performance Based on Robust Demand •Generates Q2 Net Income of $126.9 Million, or EPS of $2.36 •Achieves Record Q2 Adjusted EBITDA of $336.2 Million; Increases Adjusted EBITDA Margin 60 bps to 21.7% •Confirms

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLEA

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2025 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Financial Statements and Exhibits, 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 21, 2025 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Clean Harbors Announces First-Quarter 2025 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces First-Quarter 2025 Financial Results •Delivers Revenue Increase of 4% to $1.43 Billion with Growth in Both Operating Segments •Reports Successful Q1 Performance of Kimball Incinerator •Generates Q1 Net Income of $58.7 Million, or EPS of $1.09 •Achieves Q1 Adjusted EBITDA of $234.9 Million •Confirms Full-Year 2025 Adjusted EBITDA and Adjusted Free

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 30, 2025 CLEAN HARBORS, INC.. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissio

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLE

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

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

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

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

Clean Harbors Announces Fourth-Quarter and Full-Year 2024 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Fourth-Quarter and Full-Year 2024 Financial Results •Posts 7% Increase in Q4 Revenues to $1.43 Billion; Full-Year Revenues of $5.89 Billion, Driven by 11% Growth in Environmental Services Segment •Generates Q4 Net Income of $84.0 Million, or EPS of $1.55; Full-Year Net Income of $402.3 Million, or EPS of $7.42 •Achieves Q4 Adjusted EBITDA of $257.

Subsidiaries of Clean Harbors, Inc.

Exhibit 21 Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Ace/Allwaste Environmental Services of Indiana, LLC Illinois Altair Disposal Services, LLC Delaware American Industrial Assurance Company South Carolina Aquilex Finance LLC Delaware Aquilex Intermediate Corporate Holdings LLC Delaware Aquilex Intermediate Holdings LLC Delaware Aquilex LLC Delaware Baton Rouge Di

Insider Trading Policy (Incorporated by reference to Exhibit 19 to the Company’s Form 10-K Annual Report for the Year ended December 31, 2023.)

EXHIBIT 19 General Policies & Procedures LW 5.0 Disclosure of Material Information/Insider Trading 1.Introduction & Statement of Policy This Insider Trading Policy describes the standards of Clean Harbors, Inc. and its subsidiaries (collectively, the “Company”) on trading, and causing the trading of, the Company’s securities or securities of certain other publicly traded companies while in possess

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

Table Of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ 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 001-34223 CLEAN HA

Clawback Policy (Incorporated by reference to Exhibit 97 to the Company’s Form 10-K Annual Report for the Year ended December 31, 2023.)

EXHIBIT 97 LW 5.1 Clawback Policy 1.Introduction This Clawback Policy of Clean Harbors, Inc. (the “Company”) provides for the recoupment of certain executive compensation paid by the Company or its subsidiaries on or after the “Effective Date” specified in Section 10 below in the event of an accounting restatement resulting from material noncompliance with financial reporting requirements under th

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 19, 2025 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

Power of Attorney

EXHIBIT 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Michael L.

CLH / Clean Harbors, Inc. / Select Equity Group, L.P. - SCHEDULE 13G/A, #1 Passive Investment

SC 13G/A 1 s013024a.htm SCHEDULE 13G/A, #1 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Clean Harbors, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 184496107 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the r

EXHIBIT 99.1

EX-99.1 2 s013024b.htm EXHIBIT 99.1 EXHIBIT 99.1 The identity and the Item 3 classification of the relevant subsidiary are: Select Equity Group, L.P., which is an Investment Adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 30, 2024 CLEAN HARBORS, INC.. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

Clean Harbors Announces Third-Quarter 2024 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Third-Quarter 2024 Financial Results •Posts 12% Q3 Revenue Increase to $1.53 Billion, Led by Strength in Field Services •Generates 26% Q3 Net Income Growth to $115.2 Million, or EPS of $2.12 •Achieves 18% Growth in Q3 Adjusted EBITDA to $301.8 Million with Margin of 19.7% •Revises Full-Year 2024 Adjusted EBITDA and Adjusted Free Cash Flow Guidance

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): October 8, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissio

Amendment No. 6 to Credit Agreement dated as of October 8, 2024, among the Financial Institutions party thereto, as Lenders, Goldman Sachs Lending Partners LLC, as Administrative Agent and Collateral Agent, Clean Harbors, Inc., as Borrower, and the Loan Guarantors from time to time party thereto

Exhibit A CREDIT AGREEMENT Dated as of June 30, 2017 As amended by the First Amendment on April 17, 2018, As further amended by the Incremental Facility Amendment No.

Regulation FD Disclosure, 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 29, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissio

Clean Harbors Adds Michael Battles and Eric Gerstenberg to its Board of Directors; Expands Board to 13 Members

EXHIBIT 99.1 Press Release Clean Harbors Adds Michael Battles and Eric Gerstenberg to its Board of Directors; Expands Board to 13 Members NORWELL, Mass. – September 3, 2024 – Clean Harbors, Inc. (“Clean Harbors” or the “Company”) (NYSE: CLH), the leading provider of environmental and industrial services throughout North America, today announced that Co-Chief Executive Officers Michael Battles and

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Clean Harbors Announces Second-Quarter 2024 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Second-Quarter 2024 Financial Results •Posts 11% Q2 Revenue Increase to $1.55 Billion, Led by Environmental Services •Generates 15% Q2 Net Income Growth to $133.3 Million, or EPS of $2.46 •Achieves 14% Growth in Q2 Adjusted EBITDA to $327.8 Million with Margin of 21.1% •Raises Full-Year 2024 Adjusted EBITDA Guidance NORWELL, Mass. – July 31, 2024

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLEA

*Second Amended and Restated Confirmation and Ratification of Ancillary Loan Documents dated as of June 28, 2024 among Clean Harbors, Inc., as the U.S. Borrower, Clean Harbors Industrial Services Canada, Inc., as the Canadian Borrower, the subsidiaries of Clean Harbors, Inc. listed on Annex A thereto or that thereafter become a party thereto as Grantors, and Bank of America, N.A., as Agent for its own benefit and the benefit of the other Lenders and Credit Parties

EXECUTION VERSION SECOND AMENDED AND RESTATED CONFIRMATION AND RATIFICATION OF ANCILLARY LOAN DOCUMENTS This Second Amended and Restated Confirmation and Ratification of Ancillary Loan Documents (this “Agreement”) is made as of the 28th day of June, 2024 by and among: CLEAN HARBORS, INC.

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 28, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

*Seventh Amended and Restated Credit Agreement dated as of June 28, 2024 among Clean Harbors, Inc., as the U.S. Borrower, Clean Harbors Industrial Services Canada, Inc., as the Canadian Borrower, Bank of America, N.A., as Administrative Agent, and the Lenders party thereto

EXECUTION 11984498 SEVENTH AMENDED AND RESTATED CREDIT AGREEMENT Dated as of June 28, 2024 among CLEAN HARBORS, INC.

Clean Harbors Employee Stock Purchase Plan

EXHIBIT 10.66 CLEAN HARBORS EMPLOYEE STOCK PURCHASE PLAN 1. Purpose of the Plan. The purpose of the Plan is to provide an opportunity for Eligible Employees of the Company and its Participating Subsidiaries to purchase Common Stock at a discount through voluntary Contributions, thereby attracting, retaining and rewarding such persons and strengthening the mutuality of interest between such persons

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 22, 2024 CLEAN HARBORS, INC.

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 22, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Power of Attorney.*

EXHIBIT 24 POWER OF ATTORNEY KNOW ALL BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Michael L.

alculation of Filing Fee Table.*

EXHIBIT 107 CALCULATION OF FILING FEE TABLE Form S-8 (Form Type) Clean Harbors, Inc.

As filed with the Securities and Exchange Commission on May 23, 2024

As filed with the Securities and Exchange Commission on May 23, 2024 Registration No.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLE

Clean Harbors Announces First-Quarter 2024 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces First-Quarter 2024 Financial Results •Posts 5% Q1 Revenue Increase to $1.38 Billion, Led by 10% Growth in Environmental Services •Generates Q1 Net Income of $69.8 Million, or EPS of $1.29 •Achieves 7% Growth in Q1 Adjusted EBITDA to $230.1 Million with Margin of 16.7% •Raises Full-Year 2024 Adjusted EBITDA Guidance and Maintains Adjusted Free Cash

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

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

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

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

Second Amendment, dated as of March 22, 2024 to Sixth Amended and Restated Credit Agreement dated as of October 28, 2020, as amended, among Clean Harbors, Inc., as the U.S. Borrower, Clean Harbors Industrial Services Canada, Inc., as the Canadian Borrower, Bank of America, N.A., as Administrative Agent and the Lenders party thereto.

SECOND AMENDMENT TO CREDIT AGREEMENT This SECOND AMENDMENT TO CREDIT AGREEMENT, dated as of March 22, 2024 (this “Amendment”), is entered into by and among CLEAN HARBORS, INC.

Incremental Facility Amendment No. 5 to Credit Agreement, dated as of March 22, 2024, to Credit Agreement dated as of June 30, 2017, as previously amended, among Clean Harbors, Inc., as the Borrower, each of the entities listed as an Incremental Lender on the signature pages thereto, Goldman Sachs Lending Partners LLC, as administrative agent and collateral agent, and the other Loan Parties party thereto

Execution Version INCREMENTAL FACILITY AMENDMENT NO. 5 TO CREDIT AGREEMENT, dated as of March 22, 2024 (this “Amendment”), is made and entered into by and among Clean Harbors, Inc., a Massachusetts corporation (the “Borrower”), each of the entities listed as an Incremental Lender on the signature pages hereto (each, an “Incremental Lender” and, collectively, the “Incremental Lenders”), Goldman Sac

Clean Harbors Completes Acquisition of HEPACO Transaction Broadens Clean Harbors Field Services and Emergency Response Capabilities While Creating Significant Margin Improvement and Cross-Selling Opportunities

Exhibit 99.1 Press Release Clean Harbors Completes Acquisition of HEPACO Transaction Broadens Clean Harbors Field Services and Emergency Response Capabilities While Creating Significant Margin Improvement and Cross-Selling Opportunities NORWELL, Mass. – March 25, 2024 – Clean Harbors, Inc. (“Clean Harbors” or the “Company”) (NYSE: CLH) today announced the completion of its acquisition of HEPACO, a

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, 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 22, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Ace/Allwaste Environmental Services of Indiana, LLC Illinois Altair Disposal Services, LLC Delaware Aquilex Finance LLC Delaware Aquilex Intermediate Corporate Holdings LLC D

Exhibit 21 Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Ace/Allwaste Environmental Services of Indiana, LLC Illinois Altair Disposal Services, LLC Delaware Aquilex Finance LLC Delaware Aquilex Intermediate Corporate Holdings LLC Delaware Aquilex Intermediate Holdings LLC Delaware Aquilex LLC Delaware Baton Rouge Disposal, LLC Delaware Bridgeport Disposal, LLC Delawar

Power of Attorney

EXHIBIT 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Michael L.

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

Table Of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ 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 001-34223 CLEAN HA

Insider Trading Policy

EXHIBIT 19 General Policies & Procedures LW 5.0 Disclosure of Material Information/Insider Trading 1.Introduction & Statement of Policy This Insider Trading Policy describes the standards of Clean Harbors, Inc. and its subsidiaries (collectively, the “Company”) on trading, and causing the trading of, the Company’s securities or securities of certain other publicly traded companies while in possess

Clawback Policy

EXHIBIT 97 LW 5.1 Clawback Policy 1.Introduction This Clawback Policy of Clean Harbors, Inc. (the “Company”) provides for the recoupment of certain executive compensation paid by the Company or its subsidiaries on or after the “Effective Date” specified in Section 10 below in the event of an accounting restatement resulting from material noncompliance with financial reporting requirements under th

Clean Harbors Announces Fourth-Quarter and Full-Year 2023 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Fourth-Quarter and Full-Year 2023 Financial Results •Posts Q4 Revenue of $1.34 Billion, up 5%; Full-Year Revenues of $5.41 Billion •Generates Q4 Net Income of $98.3 Million, or EPS of $1.81; Adjusted EPS of $1.82; Full-Year Net Income of $377.9 Million, or EPS of $6.95; Adjusted EPS of $6.99 •Achieves Q4 Adjusted EBITDA of $254.9 Million, up 14%;

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 21, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

AGREEMENT OF REPORTING PERSONS

EX-99.2 3 s013024c.htm EXHIBIT 99.2 EXHIBIT 99.2 AGREEMENT OF REPORTING PERSONS The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. Th

CLH / Clean Harbors, Inc. / Select Equity Group, L.P. - SCHEDULE 13G Passive Investment

SC 13G/A 1 s013024a.htm SCHEDULE 13G SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Clean Harbors, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 184496107 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule purs

EXHIBIT 99.1

EX-99.1 2 s013024b.htm EXHIBIT 99.1 EXHIBIT 99.1 The identity and the Item 3 classification of the relevant subsidiary are: Select Equity Group, L.P., which is an Investment Adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

CLH / Clean Harbors, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0619-cleanharborsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: Clean Harbors Inc Title of Class of Securities: Common Stock CUSIP Number: 184496107 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate

CLH / Clean Harbors, Inc. / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 12 )* Clean Harbors, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 184496107 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box t

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): February 2, 2024 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Clean Harbors to Acquire HEPACO for $400 Million

Exhibit 99.1 Press Release Clean Harbors to Acquire HEPACO for $400 Million •Leading Provider of Specialized Environmental and Emergency Response Services in Eastern U.S. Will Accelerate Growth Opportunities in Environmental Services Segment •Significant Margin Improvement to be Achieved Through Projected $20 Million in Cost Synergies and Efficiency Gains •HEPACO Adds Complementary Emergency Respo

Amendment No. 4 to Credit Agreement dated as of December 27, 2023, among the Financial Institutions party thereto, as Lenders, Goldman Sachs Lending Partners LLC, as Administrative Agent and Collateral Agent, Clean Harbors, Inc. as Borrower, and the Loan Guarantors from time to time party thereto.

Execution Version AMENDMENT NO. 4 AMENDMENT NO. 4 to CREDIT AGREEMENT, dated as of December 27, 2023 (this “Amendment”), is entered into by and among Clean Harbors, Inc., a Massachusetts corporation (the “Borrower”), Goldman Sachs Lending Partners LLC, as administrative agent and collateral agent (in such capacities, the “Agent”), each Loan Party party hereto, each Lender party hereto, and Goldman

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 27, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

Clean Harbors Announces $500 Million Expansion of Share Repurchase Program

Exhibit 99.1 Press Release Clean Harbors Announces $500 Million Expansion of Share Repurchase Program NORWELL, Mass. – Dec. 7, 2023 – Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental and industrial services throughout North America, today announced that its Board of Directors has authorized a $500 million expansion of the Company’s existing share repurchase

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): December 7, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

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 1, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Clean Harbors Announces Third-Quarter 2023 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Third-Quarter 2023 Financial Results •Delivers Q3 Revenue of $1.37 Billion on Growth in Environmental Services •Achieves Q3 Net Income of $91.3 Million, or EPS of $1.68 •Generates Q3 Adjusted EBITDA of $255.0 Million •Revises 2023 Adjusted EBITDA and Adjusted Free Cash Flow Guidance NORWELL, Mass. – November 1, 2023 – Clean Harbors, Inc. (“Clean H

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLEA

Clean Harbors Announces Second-Quarter 2023 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Second-Quarter 2023 Financial Results •Grows Q2 Revenue to $1.4 Billion on Continued Strength in Environmental Services •Generates Q2 Net Income of $115.8 Million, or EPS and Adjusted EPS of $2.13 •Delivers Q2 Adjusted EBITDA of $287.5 Million •Reiterates 2023 Adjusted EBITDA and Adjusted Free Cash Flow Guidance NORWELL, Mass. – August 2, 2023 – C

Amendment No. 3 to Credit Agreement, dated June 23, 2023, among Clean Harbors, Inc., as Borrower, and Goldman Sachs Lending Partners LLC, as Administrative Agent and Collateral Agent, to that certain Credit Agreement dated as of June 30, 2017, as previously amended, among the Financial Institutions party thereto, as Lenders, Goldman Sachs Lending Partners LLC, as Administrative Agreement and Collateral Agent, Clean Harbors, Inc. as Borrower, and the Loan Guarantors from time to time party thereto

cleanharbors-amendmentno Execution Version AMENDMENT NO. 3 to CREDIT AGREEMENT, dated as of June 23, 2023 (this “Amendment”), among Clean Harbors, Inc., a Massachusetts corporation (the “Borrower”) and Gold- man Sachs Lending Partners LLC, as administrative agent and collateral agent (in such capacity, the “Administrative Agent”), amends that certain Credit Agreement dated as of June 30, 2017 (as

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 2, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

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 24, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

First Amendment dated April 28, 2023 to Sixth Amended and Restated Credit Agreement dated as of October 28, 2020 among Clean Harbors, Inc., as the U.S. Borrower, Clean Harbors Industrial Services Canada, Inc., as the Canadian Borrower, Bank of America, N.A., as Administrative Agent and the Lenders party thereto

clh-3312023ex4341bofaxcl EXECUTION FIRST AMENDMENT TO CREDIT AGREEMENT This FIRST AMENDMENT TO CREDIT AGREEMENT, dated as of April 28, 2023 (this “Amendment”), is entered into by and among CLEAN HARBORS, INC.

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLE

Sixth Amended and Restated Credit Agreement dated as of October 28, 2020, as amended through First Amendment thereto dated April 28, 2023, among Clean Harbors, Inc., as the U.S. Borrower, Clean Harbors Industrial Services Canada, Inc., as the Canadian Borrower, Bank of America, N.A., as Administrative Agent and the Lenders party thereto

clh-3312023ex4342bofaxcl EXECUTIONConformed through First Amendment (April 28, 2023) 9908973 SIXTH AMENDED AND RESTATED CREDIT AGREEMENT Dated as of October 28, 2020 as amended April 28, 2023 among CLEAN HARBORS, INC.

Clean Harbors Announces First-Quarter 2023 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces First-Quarter 2023 Financial Results •Achieves Q1 Revenue Growth of 12% to $1.31 Billion on Strength of ES Segment •Generates Q1 Net Income of $72.4 Million, or EPS of $1.33, with Adjusted EPS of $1.36 •Delivers Q1 Adjusted EBITDA Growth of 19% to $215.1 Million •Raises Full-Year 2023 Adjusted EBITDA Guidance to Reflect Acquisition of Thompson Ind

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2023 CLEAN HARBORS, INC. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registran

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registran

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

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 CLEAN HARBORS, INC.

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 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Clean Harbors Introduces 5-Year Growth Targets at 2023 Investor Day in Chicago “Vision 2027” Sets the Foundation for the Company’s Long-Term Growth Strategy Live Webcast of Investor Day to Begin at 9:00 a.m. ET Today

Exhibit 99.1 Press Release Clean Harbors Introduces 5-Year Growth Targets at 2023 Investor Day in Chicago “Vision 2027” Sets the Foundation for the Company’s Long-Term Growth Strategy Live Webcast of Investor Day to Begin at 9:00 a.m. ET Today NORWELL, Mass. – March 29, 2023 – Clean Harbors, Inc. (“Clean Harbors” or “the Company”) (NYSE: CLH), the leading provider of environmental and industrial s

Clean Harbors Appoints Former Massachusetts Lieutenant Governor Karyn Polito to Board of Directors

Exhibit 99.1 Press Release Clean Harbors Appoints Former Massachusetts Lieutenant Governor Karyn Polito to Board of Directors •Addition Bolsters Board’s Government, Regulatory and Public Affairs Expertise •Board Member Edward Galante to be Named Lead Independent Director •Dr. Eugene Banucci and Thomas Shields Plan to Retire and Therefore Not Stand for Re-election at 2023 Annual Meeting of Sharehol

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 16, 2023 CLEAN HARBORS, INC

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 16, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Clean Harbors Announces Fourth-Quarter and Full-Year 2022 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Fourth-Quarter and Full-Year 2022 Financial Results •Posts Q4 Revenue Growth of 14% to $1.28 Billion; Full-Year Revenues of $5.17 Billion •Generates Q4 Net Income of $82.5 Million, or EPS of $1.52, with Adjusted EPS of $1.44; Full-Year Net Income of $411.7 Million, or EPS of $7.56, with Adjusted EPS of $7.15 •Achieves Q4 Adjusted EBITDA Growth of

Power of Attorney

EXHIBIT 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Alan S.

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 1, 2023 CLEAN HARBORS, INC.

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 1, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Brian Weber accepted offer letter dated February 24, 2023

42 Longwater Drive P.O. Box 9149 Norwell, MA 02061-9149 February 24, 2023 Dear Brian: I am pleased to offer you a promotion to President SK Sustainability Solutions, reporting to Co-Chief Executive Officer, Mike Battles. This position will continue to be based out of our Norwell, MA location. The terms set forth in this offer will become effective March 31, 2023, pending your written acceptance of

Clean Harbors Announces Executive Leadership Update

Exhibit 99.1 Press Release Clean Harbors Announces Executive Leadership Update •Chief Accounting Officer Eric Dugas Named EVP and Chief Financial Officer •EVP Brian Weber Appointed President of Safety-Kleen Sustainability Solutions NORWELL, Mass. – March 1, 2023 – Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental and industrial services throughout North Ameri

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

Table Of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ 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 001-34223 CLEAN HA

Eric J. Dugas accepted offer letter dated February 24, 2023

42 Longwater Drive P.O. Box 9149 Norwell, MA 02061-9149 February 24, 2023 Dear Eric: I am pleased to offer you a promotion to Executive Vice President & Chief Financial Officer, reporting to Co-Chief Executive Officer Mike Battles. This position will continue to be based out of our Norwell, MA location. The terms set forth in this offer will become effective March 31, 2023, pending your written ac

Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Ace/Allwaste Environmental Services of Indiana, LLC Illinois Altair Disposal Services, LLC Delaware American Industrial Assurance Company South Carolina Aquilex Finance LLC D

EX-21 2 clh12312022ex21.htm EX-21 Exhibit 21 Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Ace/Allwaste Environmental Services of Indiana, LLC Illinois Altair Disposal Services, LLC Delaware American Industrial Assurance Company South Carolina Aquilex Finance LLC Delaware Aquilex Intermediate Corporate Holdings LLC Delaware Aquilex Intermediate Holdings LLC Delaware A

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 1, 2023 CLEAN HARBORS, INC.

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 1, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

CLH / Clean Harbors Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0595-cleanharborsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: Clean Harbors Inc. Title of Class of Securities: Common Stock CUSIP Number: 184496107 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate

CLH / Clean Harbors Inc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 11 )* Clean Harbors, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 184496107 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

Indenture dated as of January 24, 2023, among Clean Harbors, Inc., the subsidiaries of Clean Harbors, Inc. named therein as Guarantors, and U.S. Bank Trust Company, National Association, as Trustee

Exhibit 4.46 Execution Version CLEAN HARBORS, INC., as Issuer, the GUARANTORS named herein and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of January 24, 2023 6.375% Senior Notes due 2031 TABLE OF CONTENTS Page ARTICLE One DEFINITIONS AND INCORPORATION BY REFERENCE 1.1. Definitions 1 1.2. Limited Condition Acquisitions 32 1.3. Rules of Construction 33 ARTICLE Two T

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): January 24, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Entry into a Material Definitive Agreement, 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): January 17, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Clean Harbors Prices Offering of Senior Notes Due 2031

Exhibit 99.1 Press Release Clean Harbors Prices Offering of Senior Notes Due 2031 Norwell, Mass. – January 17, 2023 – Clean Harbors, Inc. (“Clean Harbors” or the “Company”) (NYSE: CLH) announced today that it has priced a private offering of $500 million of senior notes due 2031 (the “notes”). The notes, which carry an interest rate of 6.375%, were priced for purposes of resale at 100.000% of thei

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): January 17, 2023 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Clean Harbors Announces $500 Million Senior Notes Offering

Exhibit 99.1 Press Release Clean Harbors Announces $500 Million Senior Notes Offering Norwell, Mass. – January 17, 2023 – Clean Harbors, Inc. (“Clean Harbors” or the “Company”) (NYSE: CLH) announced today that it is commencing a private offering of $500 million of senior notes (the “notes”). Clean Harbors expects the notes to mature in 2031. It is anticipated that the net proceeds from this offeri

Eric Gerstenberg accepted offer letter dated November 1, 2022

Clean Harbors, Inc. 42 Longwater Drive P.O. Box 9149 Norwell, MA 02061-9149 November 1, 2022 Eric W. Gerstenberg c/o Clean Harbors Environmental Services, Inc. 42 Longwater Drive Norwell, MA 02061-9149 Dear Eric, The Board of Directors of Clean Harbors, Inc. (which, together with its subsidiaries and affiliated companies, is collectively referred to below as the ?Company?) is pleased to offer you,

Clean Harbors Announces Third-Quarter 2022 Financial Results

EX-99.1 2 clh-q32022pressrelease.htm EX-99.1 EXHIBIT 99.1 Press Release Clean Harbors Announces Third-Quarter 2022 Financial Results •Reports Q3 Revenue Growth of 43% to $1.36 Billion, Driven by Strong Demand for Services and Addition of HydroChemPSC •Delivers Q3 Net Income of $135.8 Million, EPS of $2.50 and Adjusted EPS of $2.43 •Achieves Q3 Adjusted EBITDA Growth of 67% to $308.6 Million •Revis

Michael Battles accepted offer letter dated November 1, 2022

Clean Harbors, Inc. 42 Longwater Drive P.O. Box 9149 Norwell, MA 02061-9149 November 1, 2022 Michael Battles c/o Clean Harbors Environmental Services, Inc. 42 Longwater Drive Norwell, MA 02061-9149 Dear Michael, The Board of Directors of Clean Harbors, Inc. (which, together with its subsidiaries and affiliated companies, is collectively referred to below as the ?Company?) is pleased to offer you,

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223

Severance Agreement dated as of November 1, 2022 between Eric Gerstenberg and the Company

SEVERANCE AGREEMENT This Severance Agreement (this ?Agreement?) is first executed as of this 1st day of November 2022 by and between Clean Harbors Environmental Services, Inc.

Severance Agreement dated as of November 1, 2022 between Michael Battles and the Company

SEVERANCE AGREEMENT This Severance Agreement (this ?Agreement?) is first executed as of this 1st day of November 2022 by and between Clean Harbors Environmental Services, Inc.

Alan McKim accepted offer letter dated November 1, 2022

Clean Harbors, Inc. 42 Longwater Drive P.O. Box 9149 Norwell, MA 02061-9149 November 1, 2022 Alan S. McKim c/o Clean Harbors Environmental Services, Inc. 42 Longwater Drive Norwell, MA 02061-9149 Dear Alan, The Board of Directors of Clean Harbors, Inc. (which, together with its subsidiaries and affiliated companies, is collectively referred to below as the ?Company?) is pleased to offer you, effec

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2022 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

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 2, 2022 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Clean Harbors Names Longtime Executives as Co-CEOs to Succeed Founder and CEO Alan S. McKim

Exhibit 99.1 Press Release Clean Harbors Names Longtime Executives as Co-CEOs to Succeed Founder and CEO Alan S. McKim ?CFO Michael Battles and COO Eric Gerstenberg Are Promoted to Co-CEO Role ?Alan McKim to Become Executive Chairman of the Board and CTO Norwell, Mass. ? November 2, 2022 ? Clean Harbors, Inc. (?Clean Harbors?) (NYSE: CLH), the leading provider of environmental and industrial servi

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 31, 2022 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissio

Clean Harbors Appoints Alison Quirk and Shelley Stewart Jr. to Board of Directors Company Adds Accomplished Executives with Deep Experience in Strategy and Operational Efficiency at State Street and DuPont; Expands Board to 12 Members

Exhibit 99.1 Press Release Clean Harbors Appoints Alison Quirk and Shelley Stewart Jr. to Board of Directors Company Adds Accomplished Executives with Deep Experience in Strategy and Operational Efficiency at State Street and DuPont; Expands Board to 12 Members Norwell, Mass. ? September 6, 2022 ? Clean Harbors, Inc. (?Clean Harbors?) (NYSE: CLH), the leading provider of environmental and industri

Clean Harbors Announces Record Second-Quarter 2022 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Record Second-Quarter 2022 Financial Results ?Reports Q2 Revenues of $1.36 Billion, up 46% on Strength Across All Core Businesses and Addition of HydroChemPSC ?Generates Q2 Net Income of $148.2 Million, or GAAP EPS of $2.71 and Adjusted EPS of $2.44 ?Achieves Q2 Adjusted EBITDA Growth of 65% to $309.1 Million ?Raises 2022 Adjusted EBITDA and Adjus

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLEA

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 3, 2022 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

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 25, 2022 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Clean Harbors Announces First-Quarter 2022 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces First-Quarter 2022 Financial Results ?Reports Q1 Revenues of $1.17 Billion with Strong Demand Across Core Businesses ?Generates Q1 Net Income of $45.3 Million, or EPS of $0.83 ?Achieves Q1 Adjusted EBITDA Growth of 39% to $180.3 Million with Margin of 15.4% ?Raises 2022 Adjusted EBITDA Guidance NORWELL, Mass. ? May 4, 2022 ? Clean Harbors, Inc. (?

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 4, 2022 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registran

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registran

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

Amended and Restated By-Laws of Clean Harbors, Inc.

Exhibit 3.4D CLEAN HARBORS, INC. By-Laws (Amended and Restated as of March 16, 2022) ARTICLE I Shareholders Section 1.Annual Meeting. The corporation shall each year hold an annual meeting of shareholders on such date and at a time as shall be fixed by the Directors within six (6) months after the end of the corporation?s fiscal year. The purposes for which the annual meeting is to be held, in add

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 16, 2022 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

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 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

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

Table Of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? 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 COMMISSION FILE NO. 001-34223 CLEAN HARBORS, INC. (Exact name of registrant

Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Ace/Allwaste Environmental Services of Indiana, LLC Illinois Altair Disposal Services, LLC Delaware Aquilex Finance LLC Delaware Aquilex Intermediate Corporate Holdings LLC D

Exhibit 21 Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Ace/Allwaste Environmental Services of Indiana, LLC Illinois Altair Disposal Services, LLC Delaware Aquilex Finance LLC Delaware Aquilex Intermediate Corporate Holdings LLC Delaware Aquilex Intermediate Holdings LLC Delaware Aquilex LLC Delaware Baton Rouge Disposal, LLC Delaware Bridgeport Disposal, LLC Delawar

Clean Harbors Announces Fourth-Quarter and Full-Year 2021 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Fourth-Quarter and Full-Year 2021 Financial Results ?Reports Q4 Revenues of $1.12 Billion; Full-Year Revenues of $3.81 Billion ?Generates Q4 Net Income of $49.0 Million, or EPS of $0.90, with Adjusted EPS of $0.89; Full-Year Net Income of $203.2 Million, or EPS of $3.71, with Adjusted EPS of $3.64 ?Achieves Q4 Adjusted EBITDA Growth of 23% to $174

Power of Attorney

EXHIBIT 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Alan S.

CLH / Clean Harbors Inc / 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.: 9)* Name of issuer: Clean Harbors Inc. Title of Class of Securities: Common Stock CUSIP Number: 184496107 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: ☒ 

CLH / Clean Harbors Inc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 10 )* Clean Harbors, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 184496107 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box t

Clean Harbors Announces Third-Quarter 2021 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Third-Quarter 2021 Financial Results ?Reports 22% Increase in Q3 Revenues to $951.5 Million ?Delivers Q3 Net Income of $65.4 Million, or EPS of $1.20, with Adjusted EPS of $1.14 ?Achieves 10% Growth in Q3 Adjusted EBITDA to $185.1 Million With Margin of 19.5% ?Raises Full-Year 2021 Adjusted EBITDA and Adjusted Free Cash Flow Guidance NORWELL, Mass

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 3, 2021 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223

Regulation FD Disclosure, 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, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 8, 2021 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissio

Clean Harbors Completes Acquisition of HydroChemPSC Transaction Broadens Clean Harbors Industrial Services Capabilities While Creating Significant Cross-Selling and Margin Improvement Opportunities

Exhibit 99.4 Press Release Clean Harbors Completes Acquisition of HydroChemPSC Transaction Broadens Clean Harbors Industrial Services Capabilities While Creating Significant Cross-Selling and Margin Improvement Opportunities NORWELL, Mass. ? October 8, 2021 ? Clean Harbors, Inc. (?Clean Harbors?) (NYSE: CLH) today announced the completion of its acquisition of HydroChemPSC (?HPC?), a leading U.S.

UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION

Exhibit 99.3 UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION On August 3, 2021, Clean Harbors, Inc. (?Clean Harbors?) signed a definitive agreement to acquire LJ Energy Services Intermediate Holding Corp. and its subsidiaries (collectively, ?HydroChemPSC?) from LJ Energy Services Holdings, LLC (the ?Seller?), an affiliate of Littlejohn & Co., LLC for a purchase price of $1.25 billion, subject t

Incremental Facility Amendment No. 2 to Credit Agreement, dated as of October 8, 2021, to Credit Agreement dated as of June 30, 2017, as previously amended, among Clean Harbors, Inc., as the Borrower, each of the entities listed as an Incremental Lender on the signature pages thereto, Goldman Sachs Lending Partners LLC, as Administrative Agent and Collateral Agent, and the other Loan Parties as of the date thereof

Exhibit 4.43D Execution Version INCREMENTAL FACILITY AMENDMENT NO. 2 TO CREDIT AGREEMENT, dated as of October 8, 2021 (this ?Amendment?), is made and entered into by and among Clean Harbors, Inc., a Massachusetts corporation (the ?Borrower?), each of the entities listed as an Incremental Lender on the signature pages hereto (each, an ?Incremental Lender? and, collectively, the ?Incremental Lenders

Page(s) Report of Independent Auditors 1 - 2 Consolidated Financial Statements Balance Sheet 3 Statement of Income (Loss) and Comprehensive Income (Loss) 4 Statement of Stockholders' Equity 5 Statement of Cash Flows 6 Notes to Consolidated Financial

Exhibit 99.1 LJ Energy Services Intermediate Holding Corp. Consolidated Financial Statements December 31, 2020 LJ Energy Services Intermediate Holding Corp. Index December 31, 2020 Page(s) Report of Independent Auditors 1 - 2 Consolidated Financial Statements Balance Sheet 3 Statement of Income (Loss) and Comprehensive Income (Loss) 4 Statement of Stockholders' Equity 5 Statement of Cash Flows 6 N

Page(s) Condensed Consolidated Financial Statements Balance Sheet 1 Statement of Income and Comprehensive Income 2 Statement of Stockholders' Equity 3 Statement of Cash Flows 4 Notes to Condensed Consolidated Financial Statements 5 - 16

Exhibit 99.2 LJ Energy Services Intermediate Holding Corp. Condensed Consolidated Financial Statements Six Months Ended June 30, 2021 LJ Energy Services Intermediate Holding Corp. Index June 30, 2021 Page(s) Condensed Consolidated Financial Statements Balance Sheet 1 Statement of Income and Comprehensive Income 2 Statement of Stockholders' Equity 3 Statement of Cash Flows 4 Notes to Condensed Cons

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 8, 2021 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

Clean Harbors Appoints Marcy Reed to Board of Directors Former National Grid Executive and Financial Expert Is Newest Independent Director

Exhibit 99.1 Press Release Clean Harbors Appoints Marcy Reed to Board of Directors Former National Grid Executive and Financial Expert Is Newest Independent Director NORWELL, Mass. ? September 10, 2021 ? Clean Harbors, Inc. (?Clean Harbors?) (NYSE: CLH), the leading provider of environmental and industrial services throughout North America, today announced the appointment of Marcy Reed to the Comp

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLEA

Stock Purchase Agreement by and among Clean Harbors, Inc., LJ Energy Services Holdings LLC,

STOCK PURCHASE AGREEMENT by and among CLEAN HARBORS, INC., LJ ENERGY SERVICES HOLDINGS LLC, and LJ ENERGY SERVICES INTERMEDIATE HOLDING CORP. Dated August 3, 2021 968037.12 TABLE OF CONTENTS ARTICLE I CERTAIN DEFINITIONS 1 Section 1.1 Certain Definitions 1 Section 1.2 Interpretation 12 ARTICLE II SALE AND PURCHASE OF THE STOCK; PURCHASE PRICE 13 Section 2.1 Sale and Purchase of the Stock 13 Sectio

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 4, 2021 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Clean Harbors to Acquire HydroChemPSC for $1.25 Billion

EXHIBIT 99.1 Press Release Clean Harbors to Acquire HydroChemPSC for $1.25 Billion ?Industry-Leading Provider of Industrial Cleaning and Specialty Infrastructure Services Expands Clean Harbors? Industrial and Field Services Offerings ?Complementary and Diverse Customer Base and Services Create Significant Cross-Selling and Margin Improvement Opportunities ?Transaction Expected to Close in 2021 NOR

Clean Harbors Announces Second-Quarter 2021 Financial Results

EXHIBIT 99.1 Press Release Clean Harbors Announces Second-Quarter 2021 Financial Results ?Achieves 30% Increase in Q2 Revenues to $926.5 Million ?Delivers Q2 Net Income of $67.1 Million, or EPS of $1.22, with Adjusted EPS of $1.19 ?Reports Q2 Adjusted EBITDA of $187.8 Million, a 36% Increase; Margin Improves by 80 Basis Points to 20.3% ?Unveils Incineration Expansion Plan at Kimball, Nebraska Faci

Regulation FD Disclosure, 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): August 3, 2021 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 2, 2021 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLE

For the Three Months Ended For the Twelve Months Ended March 31, 2020 June 30, 2020 September 30, 2020 December 31, 2020 December 31, 2020 December 31, 2019 Net income $ 11,572 $ 29,023 $ 54,910 $ 39,332 $ 134,837 $ 97,740 Accretion of environmental

EXHIBIT 99.1 Full Year 2020 by Quarter and Full Year 2019 Unaudited Segment Information The following table sets forth certain financial information associated with our results of operations (unaudited, in thousands): Summary of Operations For the Three Months Ended For the Twelve Months Ended March 31, 2020 June 30, 2020 September 30, 2020 December 31, 2020 December 31, 2020 December 31, 2019 Dir

Clean Harbors Announces First-Quarter 2021 Financial Results

Press Release Clean Harbors Announces First-Quarter 2021 Financial Results ?Reports Q1 Revenues of $808.

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 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi

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 5, 2021 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi

- DEFA14A

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

Clean Harbors, Inc. Amended and Restated Management Incentive

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

- PRE 14A

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

Amended and Restated By-Laws of Clean Harbors, Inc.

Exhibit 3.4D CLEAN HARBORS, INC. By-Laws (Amended and Restated as of April 1, 2021) ARTICLE I Shareholders Section 1. Annual Meeting. The corporation shall each year hold an annual meeting of shareholders on such date and at a time as shall be fixed by the Directors within six (6) months after the end of the corporation?s fiscal year. The purposes for which the annual meeting is to be held, in add

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 1, 2021 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Annual Report - 10-K

Table Of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? 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 COMMISSION FILE NO. 001-34223 CLEAN HARBORS, INC. (Exact name of registrant

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 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Altair Disposal Services, LLC Delaware Baton Rouge Disposal, LLC Delaware Bridgeport Disposal, LLC Delaware CH International Holdings, LLC Delaware Clean Harbors Andover, LLC

EX-21 2 clh12312020ex21.htm EX-21 Exhibit 21 Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Altair Disposal Services, LLC Delaware Baton Rouge Disposal, LLC Delaware Bridgeport Disposal, LLC Delaware CH International Holdings, LLC Delaware Clean Harbors Andover, LLC Delaware Clean Harbors Aragonite, LLC Delaware Clean Harbors Arizona, LLC Delaware Clean Harbors Baton R

Power of Attorney

EXHIBIT 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Alan S.

Clean Harbors Announces Fourth-Quarter and Full-Year 2020 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Fourth-Quarter and Full-Year 2020 Financial Results · Reports Q4 Revenues of $796.2 Million; Full-Year Revenues of $3.1 Billion · Posts Q4 Net Income of $39.3 Million, or EPS of $0.71, with Adjusted EPS of $0.63; Full-Year Net Income of $134.8 Million, or EPS of $2.42, with Adjusted EPS of $2.32 · Achieves Q4 Adjusted EBITDA of $136.1 Million; Gen

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* CLEAN HARBORS, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: Clean Harbors Inc. Title of Class of Securities: Common Stock CUSIP Number: 184496107 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: ☒ 

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 9 )* Clean Harbors, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 184496107 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

Clean Harbors Announces Third-Quarter 2020 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Third-Quarter 2020 Financial Results · Reports Q3 Revenues of $779.3 Million · Posts Q3 Net Income of $54.9 Million; EPS of $0.99; Adjusted EPS of $0.90 · Achieves Adjusted EBITDA of $161.2 Million, Including $13.3 Million From Government Assistance Programs · Generates $29 Million in Q3 Decontamination Emergency Response Revenue · Delivers Record

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2020 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223

Sixth Amended and Restated Credit Agreement dated as of October 28, 2020 among Clean Harbors, Inc., as the U.S. Borrower, Clean Harbors Industrial Services Canada, Inc., as the Canadian Borrower, Bank of America, N.A., as Administrative Agent, and the Lenders party thereto

Exhibit 4.34 EXECUTION SIXTH AMENDED AND RESTATED CREDIT AGREEMENT Dated as of October 28, 2020 among CLEAN HARBORS, INC. as the U.S. Borrower, CLEAN HARBORS INDUSTRIAL SERVICES CANADA, INC., as the Canadian Borrower, BANK OF AMERICA, N.A., as Administrative Agent and The Lenders Party Hereto BofA SECURITIES, INC., as Sole Lead Arranger and Sole Book Manager JPMORGAN CHASE BANK, N.A., CITIZENS BAN

Amended and Restated Confirmation and Ratification of Ancillary Loan Documents dated as of October 28, 2020 among Clean Harbors, Inc., as the U.S. Borrower, Clean Harbors Industrial Services Canada, Inc., as the Canadian Borrower, the subsidiaries of Clean Harbors, Inc. listed on Annex A thereto or that thereafter become a party thereto as Grantors, and Bank of America, N.A., as Agent for its own benefit and the benefit of the other Lenders and Credit Parties

Exhibit 4.34K EXECUTION Amended and restated CONFIRMATION AND RATIFICATION OF ANCILLARY LOAN DOCUMENTS This Amended and Restated Confirmation and Ratification of Ancillary Loan Documents (this “Agreement”) is made as of the 28th day of October, 2020 by and among: CLEAN HARBORS, INC., a Massachusetts corporation (the “U.S. Borrower”), CLEAN HARBORS INDUSTRIAL SERVICES CANADA, INC., an Alberta corpo

Entry into a Material Definitive Agreement, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 28, 2020 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLEA

Clean Harbors Announces Second-Quarter 2020 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Second-Quarter 2020 Financial Results · Reports Q2 Revenues of $710.0 Million · Posts Q2 Net Income of $29.0 Million, or EPS of $0.52 · Achieves Adjusted EBITDA of $135.5 Million, Which Includes $23.4 Million of Assistance from Government Programs · Generates $50 Million in Q2 Decontamination Emergency Response Work · Delivers Strong Free Cash Flo

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 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 3, 2020 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction
of incorporation) (Commission
F

Form of Performance-Based Restricted Stock Award Agreement [for use under Clean Harbors, Inc. 2020 Stock Incentive Plan]

CLEAN HARBORS, INC. Performance-Based Restricted Stock Award Agreement [2020 Stock Incentive Plan] Employee: [ ] Number of Shares: [ ] Date of Award: [ ] THIS AGREEMENT (the “Agreement”) is made effective as of the date of the award set forth above (the “Award Date”) between Clean Harbors, Inc., a Massachusetts corporation (the “Company”), and the above-referenced employee of the Company or one of

Form of Restricted Stock Award Agreement [Non-Employee Director] [for use under 2020 Stock Incentive Plan]

CLEAN HARBORS, INC. Restricted Stock Award Agreement [Non-Employee Director, 2020 Stock Incentive Plan] Director: [Director Name ] Number of Shares: [ ] Award Date: [ ] THIS AGREEMENT (the “Agreement”) is made effective as of the date set forth above (the “Award Date”) between Clean Harbors, Inc., a Massachusetts corporation (the “Company”), and the above-referenced non-employee director (the “Dir

Power of Attorney.

EXHIBIT 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Alan S.

- S-8

As filed with the Securities and Exchange Commission on June 3, 2020 Registration No.

Form of Restricted Stock Award Agreement [Employee] [for use under Clean Harbors, Inc. 2020 Stock Incentive Plan]

CLEAN HARBORS, INC. Time-Vesting Restricted Stock Award Agreement [2020 Stock Incentive Plan] Employee: [ ] Number of Shares: [ ] Award Date: [ ] THIS AGREEMENT (the “Agreement”) is made effective as of the date set forth above (the “Award Date”) between Clean Harbors, Inc., a Massachusetts corporation (the “Company”), and the above-referenced employee of the Company or one of its subsidiaries (th

Clean Harbors Announces First-Quarter 2020 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces First-Quarter 2020 Financial Results · Reports Q1 Revenues up 10% to $858.6 Million · Increases Q1 Net Income to $11.6 Million, or EPS of $0.21, with Adjusted EPS of $0.28 · Achieves 21% Growth in Q1 Adjusted EBITDA to $122.6 Million · Improves Q1 Adjusted EBITDA Margin by 130 Basis Points to 14.3% · Takes Wide Range of Actions in Response to COVI

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLE

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2020 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Clean Harbors, Inc. 2020 Stock Incentive Plan

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

- DEFA14A

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

Clean Harbors Announces Fourth-Quarter and Year-End 2019 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Fourth-Quarter and Year-End 2019 Financial Results • Reports Q4 Revenues of $871.0 Million; Full-Year Revenues up 3.4% to $3.4 Billion • Increases Q4 Net Income to $24.2 Million, or EPS of $0.43, with Adjusted EPS of $0.42; Full-Year Net Income of $97.7 Million, or EPS of $1.74, with Adjusted EPS of $1.89 • Achieves 8% Growth in Q4 Adjusted EBITDA

Annual Report - 10-K

Table Of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 COMMISSION FILE NO. 001-34223 CLEAN HARBORS, INC. (Exact name of registrant

Fourth Amendment to Credit Agreement, dated as of February 20, 2020, by and among Clean Harbors, Inc., Clean Harbors Industrial Services Canada, Inc., the Other Loan Parties party thereto, certain of the Lenders party thereto which constitute the "Required Lenders," and Bank of America, N.A., as Agent

EXHIBIT 4.34J FOURTH AMENDMENT TO CREDIT AGREEMENT This FOURTH AMENDMENT TO CREDIT AGREEMENT, dated as of February 20, 2020 (this “Fourth Amendment”), is entered into by and among CLEAN HARBORS, INC., a Massachusetts corporation (the “U.S. Borrower”), CLEAN HARBORS INDUSTRIAL SERVICES CANADA, INC., an Alberta corporation (the “Canadian Borrower” and, together with the U.S. Borrower, the “Borrowers

Power of Attorney

EXHIBIT 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Alan S.

Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Altair Disposal Services, LLC Delaware Baton Rouge Disposal, LLC Delaware Bridgeport Disposal, LLC Delaware Cat Tech International, Ltd.* Bahamas CH International Holdings, L

Exhibit 21 Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Altair Disposal Services, LLC Delaware Baton Rouge Disposal, LLC Delaware Bridgeport Disposal, LLC Delaware Cat Tech International, Ltd.* Bahamas CH International Holdings, LLC Delaware Clean Harbors Andover, LLC Delaware Clean Harbors Aragonite, LLC Delaware Clean Harbors Arizona, LLC Delaware Clean Harbors Bat

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2020 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

CLH / Clean Harbors, Inc. / Arrowpoint Asset Management, LLC - SCHEDULE 13G HOLDINGS REPORT AMENDMENT Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

CLH / Clean Harbors, Inc. / 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.: 7)* Name of issuer: Clean Harbors Inc Title of Class of Securities: Common Stock CUSIP Number: 184496107 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ R

CLH / Clean Harbors, Inc. / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 8 )* Clean Harbors, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 184496107 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

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): December 12, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

Clean Harbors Appoints Robert Willett to Board of Directors President and CEO of Cognex Corp. Enhances Board’s Strategic and Operational Expertise

Press Release Clean Harbors Appoints Robert Willett to Board of Directors President and CEO of Cognex Corp.

Clean Harbors Announces Third-Quarter 2019 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Third-Quarter 2019 Financial Results · Increases Q3 Revenues 6% to $891.7 Million · Reports Net Income of $36.4 Million, or $0.65 per Diluted Share; Adjusted EPS of $0.72 · Achieves 11% Increase in Q3 Adjusted EBITDA to $156.6 Million on Strength in Incineration and Environmental Services · Improves Adjusted EBITDA Margin by 80 Basis Points to 17.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 30, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223

Clean Harbors Announces Second-Quarter 2019 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Second-Quarter 2019 Financial Results · Increases Q2 Revenues 2% to $868.7 Million · Reports Net Income of $36.2 Million, or $0.65 per Diluted Share; Adjusted EPS of $0.66 · Delivers 7% Increase in Q2 Adjusted EBITDA to $149.8 Million on Solid Increases in Environmental Services and Safety-Kleen Segments · Improves Adjusted EBITDA Margin by 80 Bas

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-34223 CLEA

Supplemental Indenture dated as of July 2, 2019 to the Indenture dated as of December 7, 2012 among Clean Harbors, Inc., as Issuer, the subsidiaries of Clean Harbors, Inc. named therein as Guarantors, and U.S. Bank National Association, as Trustee

EXHIBIT 4.42.A SUPPLEMENTAL INDENTURE SUPPLEMENTAL INDENTURE dated as of July 2, 2019 (this “Supplemental Indenture”) among CLEAN HARBORS, INC., a Massachusetts corporation (the “Issuer” or the “Company”), the Guarantors (as defined in the Indenture referred to below) and U.S. BANK NATIONAL ASSOCIATION, as Trustee (the “Trustee”) under the Indenture referred to below. W I T N E S S E T H: WHEREAS,

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): July 2, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Third Amendment to Credit Agreement, dated as of July 2, 2019, by and among Clean Harbors, Inc., Clean Harbors Industrial Services Canada Inc., the Other Loan Parties party thereto, certain of the Lenders party thereto which constitute the “Required Lenders,” and Bank of America, N.A., as Agent

EXHIBIT 4.34I Execution copy THIRD AMENDMENT TO CREDIT AGREEMENT This THIRD AMENDMENT TO CREDIT AGREEMENT, dated as of July 2, 2019 (this “Third Amendment”), is entered into by and among CLEAN HARBORS, INC., a Massachusetts corporation (the “U.S. Borrower”), CLEAN HARBORS INDUSTRIAL SERVICES CANADA, INC., an Alberta corporation (the “Canadian Borrower” and, together with the U.S. Borrower, the “Bo

Indenture dated as of July 2, 2019, among Clean Harbors, Inc., as Issuer, the subsidiaries of Clean Harbors, Inc. named therein as Guarantors, and U.S. Bank National Association, as Trustee

EXHIBIT 4.45 Execution Version CLEAN HARBORS, INC., as Issuer, the GUARANTORS named herein and U.S. BANK NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of July 2, 2019 4.875% Senior Notes due 2027 5.125% Senior Notes due 2029 1 TABLE OF CONTENTS Page ARTICLE ONE DEFINITIONS AND INCORPORATION BY REFERENCE 1.1. Definitions 1 1.2. Limited Condition Acquisitions 34 1.3. Rules of Construction 35 A

Clean Harbors Announces Results Through Early Tender Date of Tender Offer and Consent Solicitation

Exhibit 99.1 Press Release Clean Harbors Announces Results Through Early Tender Date of Tender Offer and Consent Solicitation NORWELL, Mass. - (BUSINESS WIRE) - July 2, 2019 - Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH) announced today that, pursuant to its previously announced tender offer and consent solicitation (collectively, the “Tender Offer”) to purchase any and all of its outstanding

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): July 2, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Clean Harbors Prices Offering of Senior Notes; Increases Deal Size to $845 Million

Exhibit 99.1 Press Release Clean Harbors Prices Offering of Senior Notes; Increases Deal Size to $845 Million Norwell, Mass - June 19, 2019 - Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH) announced today that it has priced a private offering of $845 million of senior notes. The offering size was increased from the previously announced aggregate principal amount of $800 million. The offering co

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 18, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Clean Harbors Commences Cash Tender Offer for Any and All $845,000,000 Aggregate Principal Amount of Its Outstanding 5.125% Senior Notes Due 2021

Exhibit 99.2 Press Release Clean Harbors Commences Cash Tender Offer for Any and All $845,000,000 Aggregate Principal Amount of Its Outstanding 5.125% Senior Notes Due 2021 Norwell, Mass. - June 18, 2019 - Clean Harbors, Inc. (NYSE: CLH) (“Clean Harbors,” the “Company” or “we”) has commenced an offer to purchase for cash (the “Tender Offer”) any and all of the $845,000,000 aggregate principal amou

Clean Harbors Announces $800 Million Senior Notes Offering

EX-99.1 2 clh-6182019ex991.htm EXHIBIT 99.1 Exhibit 99.1 Press Release Clean Harbors Announces $800 Million Senior Notes Offering Norwell, Mass. - June 18, 2019 - Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH) announced today that it is commencing a private offering of $800 million of unsecured senior notes (the “Notes”). Clean Harbors expects that a portion of the Notes will mature in 2027 and

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): June 18, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 5, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Amendment to Registrant's Code of Ethics, or Waiver of a Provision of the Code of Ethics

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi

Clean Harbors Announces First-Quarter 2019 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces First-Quarter 2019 Financial Results · Increases Q1 Revenues 4% to $780.8 Million · Reports Net Income of $1.0 Million, or $0.02 per Diluted Share; Adjusted EPS of $0.09 · Generates 15% Increase in Q1 Adjusted EBITDA to $101.7 Million on Strength in Environmental Services Segment · Improves Adjusted EBITDA Margin by 120 Basis Points · Revises 2019

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2019 OR o 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 001-34223 CLE

CLH / Clean Harbors, Inc. DEFA14A

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

Clean Harbors, Inc. 2019 CEO Annual Incentive Bonus Plan

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

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 27, 2019 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commiss

Clean Harbors Announces Strong Fourth-Quarter and Year-End 2018 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Strong Fourth-Quarter and Year-End 2018 Financial Results · Increased Q4 Revenues 15% to $858.2 Million; Full-Year Revenues Up 12% to $3.3 Billion · Reported Q4 Net Income of $16.4 Million, or EPS of $0.29, with Adjusted EPS of $0.24; Full-Year Net Income of $65.6 Million, or EPS of $1.16, with Adjusted EPS of $1.26 · Generated Q4 Adjusted EBITDA

Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Altair Disposal Services, LLC Delaware Baton Rouge Disposal, LLC Delaware BCT Structures, ULC* Alberta Bridgeport Disposal, LLC Delaware Cat Tech International, Ltd.* Bahamas

Exhibit 21 Subsidiaries of Clean Harbors, Inc. Subsidiary Jurisdiction of Organization Altair Disposal Services, LLC Delaware Baton Rouge Disposal, LLC Delaware BCT Structures, ULC* Alberta Bridgeport Disposal, LLC Delaware Cat Tech International, Ltd.* Bahamas CH International Holdings, LLC Delaware Clean Harbors Andover, LLC Delaware Clean Harbors Aragonite, LLC Delaware Clean Harbors Arizona, L

CLH / Clean Harbors, Inc. 10-K (Annual Report)

Table Of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . COMMISSION FILE NO. 001-34223 CLEAN HAR

Power of Attorney

EX-24 4 clh12312018ex24.htm EXHIBIT 24 EXHIBIT 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Alan S. McKim and Michael L. Battles, signing singly, the undersigned’s true and lawful attorney-in-fact to: (1) execute for and on behalf of the undersigned, in the undersigned’s capacity as an officer and/or director of Clean Harbors, Inc. (

CLH / Clean Harbors, Inc. / Arrowpoint Asset Management, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

CLH / Clean Harbors, Inc. / SOUTHERNSUN ASSET MANAGEMENT, LLC - SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 Clean Harbors Inc. (Name of Issuer) Common (Title of Class of Securities) 184496107 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d

CLH / Clean Harbors, Inc. / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7 )* Clean Harbors, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 184496107 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

CLH / Clean Harbors, Inc. / VANGUARD GROUP INC Passive Investment

cleanharborsinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6 )* Name of issuer: Clean Harbors Inc Title of Class of Securities: Common Stock CUSIP Number: 184496107 Date of Event Which Requires Filing of this Statement: December 31, 2018 Check the appropriate box to

Clean Harbors Announces Third-Quarter 2018 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Third-Quarter 2018 Financial Results · Achieves 12% Revenue Increase to $843.2 Million on Veolia Acquisition, Pricing Initiatives and Safety-Kleen Growth · Reports Net Income of $31.1 Million, or $0.55 per Diluted Share; Adjusted EPS of $0.59 per Diluted Share · Generates Q3 Adjusted EBITDA of $141.3 Million, up 15% on Higher-Margin Waste Streams,

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 31, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commissi

CLH / Clean Harbors, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES OF AMERICA SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

Clean Harbors Announces Second-Quarter 2018 Financial Results

Exhibit 99.1 Press Release Clean Harbors Announces Second-Quarter 2018 Financial Results · Achieves 13% Increase in Q2 Revenues to $849.1 Million, Driven by Strong Organic Growth and Veolia Acquisition · Reports Net Income of $30.7 Million, or $0.54 per Diluted Share · Delivers Q2 Adjusted EBITDA of $139.6 Million, up 16% on Strong Waste Volumes, Industrial Turnarounds and Safety-Kleen Growth; Mar

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

CLH / Clean Harbors, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES OF AMERICA SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

Entry into a Material Definitive Agreement, Termination of 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): July 19, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Supplemental Indenture dated as of July 9, 2018, to the Indenture dated as July 30, 2012, among Clean Harbors, Inc., as Issuer, the Guarantors listed on the signature pages thereto, and U.S. Bank National Association, as Trustee

SUPPLEMENTAL INDENTURE SUPPLEMENTAL INDENTURE dated as of July 9, 2018 (this “Supplemental Indenture”) among CLEAN HARBORS, INC.

Incremental Facility Amendment dated July 19, 2018, to Credit Agreement dated as of June 30, 2017, among the Financial Institutions party thereto, as Lenders, Goldman Sachs Lending Partners LLC, as Administrative Agent and Collateral Agent, Clean Harbors, Inc., as Borrower, and the Loan Guarantors from time to time party thereto

Execution Version INCREMENTAL FACILITY AMENDMENT TO CREDIT AGREEMENT, dated as of July 19, 2018 (this “Amendment”), is made and entered into by and among Clean Harbors, Inc.

Second Amendment to Credit Agreement, dated as of July 19, 2018, by and among Clean Harbors, Inc., Clean Harbors Industrial Services Canada, the Other Loan Parties party thereto, certain of the Lenders party thereto which constitute the “Required Lenders,” and Bank of America, N.A., as Agent.

EXECUTION SECOND AMENDMENT TO credit AGREEMENT This SECOND AMENDMENT TO CREDIT AGREEMENT, dated as of July 19, 2018 (this “Second Amendment”), is entered into by and among CLEAN HARBORS, INC.

CLEAN HARBORS ANNOUNCES EARLY RESULTS OF TENDER OFFER AND INTENDED REDEMPTION OF 5.25% SENIOR NOTES DUE 2020 Tender Offer and Early Redemption Expected to be Funded by Incremental $350 Million Term Loan B Debt Financing Along with Available Cash or B

EXHIBIT 99.1 Press Release CLEAN HARBORS ANNOUNCES EARLY RESULTS OF TENDER OFFER AND INTENDED REDEMPTION OF 5.25% SENIOR NOTES DUE 2020 Tender Offer and Early Redemption Expected to be Funded by Incremental $350 Million Term Loan B Debt Financing Along with Available Cash or Borrowings under Clean Harbors’ Existing Revolving Credit Facility NORWELL, Mass. - July 3, 2018 - Clean Harbors, Inc. (“Cle

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): July 3, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Clean Harbors Commences Cash Tender Offer and Consent Solicitation for Any and All of Its Outstanding 5.25% Senior Notes Due 2020 Tender Offer and Redemption Expected to be Funded by Proposed Incremental $350 Million Term Loan B Debt Financing Along

EXHIBIT 99.1 Press Release Clean Harbors Commences Cash Tender Offer and Consent Solicitation for Any and All of Its Outstanding 5.25% Senior Notes Due 2020 Tender Offer and Redemption Expected to be Funded by Proposed Incremental $350 Million Term Loan B Debt Financing Along With Available Cash or Borrowings Under the Company’s Existing Revolving Credit Facility NORWELL, Mass. - June 19, 2018 - C

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 19, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 6, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission F

Consolidated Financial Statements Veolia ES Industrial Services, Inc. (An Indirect Wholly Owned Subsidiary of Veolia North America, Inc.) Years Ended December 31, 2017 and 2016 With Report of Independent Auditors Veolia ES Industrial Services, Inc. (

Exhibit 99.1 Consolidated Financial Statements Veolia ES Industrial Services, Inc. (An Indirect Wholly Owned Subsidiary of Veolia North America, Inc.) Years Ended December 31, 2017 and 2016 With Report of Independent Auditors Veolia ES Industrial Services, Inc. (An Indirect Wholly Owned Subsidiary of Veolia North America, Inc.) Consolidated Financial Statements Years Ended December 31, 2017 and 20

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A 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, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commi

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

Exhibit 99.2 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION On January 17, 2018, Clean Harbors, Inc. (the “Company”) entered into a purchase agreement with Veolia Environmental Services North America LLC (“Seller”) to acquire Seller’s U.S. Industrial Cleaning Business (the “Veolia Business”) for a purchase price (subject to certain working capital and other adjustments) of $120 milli

Summary of Operations (in thousands)

EXHIBIT 99.1 Full Year 2017 by Quarter and Full Year 2016 Unaudited Segment Information The following table sets forth certain financial information associated with our results of operations (unaudited, in thousands): Summary of Operations (in thousands) For the Three Months Ended For the Twelve Months Ended March 31, 2017 June 30, 2017 September 30, 2017 December 31, 2017 December 31, 2017 Decemb

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 2, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2018 CLEAN HARBORS, INC. (Exact name of registrant as specified in its charter) Massachusetts 001-34223 04-2997780 (State or other jurisdiction of incorporation) (Commission Fi