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CLEAN HARBORS, INC.0000822818DEF 14Afalse

(9) CAP is calculated in accordance with the Item 402(v) of Regulation S-K. Reconciliations of Summary Compensation Table data to CAP for fiscal 2025, 2024, 2023, 2022 and 2021 for the PEOs and the Non-PEO NEOs are included in the tables below. Mr. McKim was not a PEO during 2025 or 2024 and accordingly, there are no amounts included in that column of the PEO (Alan S. McKim) table. Mr. McKim is a Non-PEO NEO in 2025 and 2024 so his amounts are included therein.


	PEO (Alan S. McKim)
Year	2025		2024		2023		2022		2021
Summary Compensation Table Total Compensation	$	—	$	—	$	2,296,564	$	6,241,356	$	5,612,724
Less: Grant Date Fair Value of Stock Awards (from Summary Compensation Table)	—		—		—		1,199,998		1,293,846
Add:	—
Change in Fair Value of Awards Granted During Year and Outstanding and Unvested as of Year-End	—		—		—		1,492,575		1,384,608
Change in Fair Value of Prior Year Awards Unvested as of Year-End	—		—		1,134,728		159,314		150,020
Change in Fair Value of Prior Year Awards that Vested During Year	—		—		189,183		79,802		747,590
Total Additions to Compensation Actually Paid	—		—		1,323,911		1,731,691		2,282,218
Compensation Actually Paid	$	—	$	—	$	3,620,475	$	6,773,049	$	6,601,096

	Co-PEO (Michael L. Battles)
Year	2025		2024		2023		2022		2021
Summary Compensation Table Total Compensation	$	5,927,812	$	5,286,045	$	4,917,312	$	—	$	—
Less: Grant Date Fair Value of Stock Awards (from Summary Compensation Table)	3,197,110		2,881,028		2,931,746		—		—
Add:
Change in Fair Value of Awards Granted During Year and Outstanding and Unvested as of Year-End	3,217,535		4,339,520		5,086,269		—		—
Change in Fair Value of Prior Year Awards Unvested as of Year-End	158,857		1,799,853		1,250,254		—		—
Change in Fair Value of Prior Year Awards that Vested During Year	(64,334)		345,520		846,669		—		—
Change in Fair Value of Prior Year Awards that Forfeited During Year	—		(827,875)		—		—		—
Total Additions to Compensation Actually Paid	3,312,058		5,657,018		7,183,192		—		—
Compensation Actually Paid	$	6,042,760	$	8,062,035	$	9,168,758	$	—	$	—

	Co-PEO (Eric W. Gerstenberg)
Year	2025		2024		2023		2022		2021
Summary Compensation Table Total Compensation	$	5,929,422	$	5,282,845	$	4,938,543	$	—	$	—
Less: Grant Date Fair Value of Stock Awards (from Summary Compensation Table)	3,197,110		2,881,028		2,931,746		—		—
Add:
Change in Fair Value of Awards Granted During Year and Outstanding and Unvested as of Year-End	3,217,535		4,339,520		5,086,268		—		—
Change in Fair Value of Prior Year Awards Unvested as of Year-End	146,748		1,769,034		1,792,496		—		—
Change in Fair Value of Prior Year Awards that Vested During Year	(36,890)		526,505		1,360,591		—		—
Change in Fair Value of Prior Year Awards that Forfeited During Year	—		(827,875)		—		—		—
Total Additions to Compensation Actually Paid	3,327,393		5,807,184		8,239,355		—		—
Compensation Actually Paid	$	6,059,705	$	8,209,001	$	10,246,152	$	—	$	—

—1,199,9981,293,846—1,492,5751,384,6081,134,728159,314150,020189,18379,802747,5901,323,9111,731,6912,282,2183,197,1102,881,0282,931,7463,217,5354,339,5205,086,269158,8571,799,8531,250,25464,334345,520846,669—827,875—3,312,0585,657,0187,183,1923,197,1102,881,0282,931,7463,217,5354,339,5205,086,268146,7481,769,0341,792,49636,890526,5051,360,591—827,875—3,327,3935,807,1848,239,355


	Average of Non-PEO NEOs
Year	2025		2024		2023		2022		2021
Summary Compensation Table Total Compensation	$	2,143,175	$	2,399,973	$	1,344,687	$	2,755,014	$	2,931,679
Less: Grant Date Fair Value of Stock Awards (from Summary Compensation Table)	457,204		908,296		342,733		1,371,984		1,604,777
Add:
Change in Fair Value of Awards Granted During Year and Outstanding and Unvested as of Year-End	460,108		1,204,668		1,281,296		1,706,493		1,643,335
Change in Fair Value of Prior Year Awards Unvested as of Year-End	46,648		429,686		844,916		325,300		543,138
Change in Fair Value of Prior Year Awards that Vested During Year	(58,323)		113,946		251,540		(65,278)		318,653
Change in Fair Value of Prior Year Awards that Forfeited During Year	—		(248,502)		—		—		(95,753)
Total Additions to Compensation Actually Paid	448,433		1,499,798		2,377,752		1,966,515		2,409,373
Compensation Actually Paid	$	2,134,404	$	2,991,475	$	3,379,706	$	3,349,545	$	3,736,275

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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 Proxy uncheck image.jpg

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 Proxy Statement
			Definitive Additional Materials
			Soliciting Material under §240.14a-12


Clean Harbors, Inc.


(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)


Payment of Filing Fee (Check all the boxes that apply):
			No fee required.
			Fee paid previously with preliminary materials.
			Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

April 10, 2026

Corporate Headquarters

42 Longwater Drive

Norwell, Massachusetts 02061

Tel. 781-792-5000

To Our Fellow Shareholders:

On behalf of the Board of Directors, it is my pleasure to invite you to attend the 2026 annual meeting of shareholders, to be held at 10:00 a.m., local time, on Wednesday, May 20, 2026, at our company’s training facility at 101 Philip Drive, Norwell, Massachusetts, located adjacent to our company’s headquarters.

Information about the annual meeting is presented on the following pages. In addition to the formal items of business, the meeting will include a report by members of management on our company’s operations. You will have an opportunity to ask questions of our management team if you attend the meeting in person.

For the 2026 annual meeting, we are again using the “notice and access” method of providing proxy materials via the internet. On or about April 10, 2026, we will be mailing to our shareholders a notice of internet availability of proxy materials, or “e-proxy notice,” containing instructions on how to access our 2026 proxy statement and the 2025 annual report to shareholders (including our 2025 Annual Report on Form 10-K).

Your vote is important. If you are unable to attend the meeting in person, it is important that your shares be represented and voted at the annual meeting. You may authorize your proxy to vote your shares over the internet, by telephone, or by mail as described under "General Matters - Proxy Solicitation" in the attached proxy statement.

Please note that under the current rules of the New York Stock Exchange, your broker will not be able to vote your shares at the annual meeting on the election of directors or on certain other proposals described in the attached proxy statement if you have not given your broker instructions on how to vote. Please be sure to give voting instructions to your broker so that your vote can be counted with respect to the election of directors and such other proposals.

Thank you for your continued support of Clean Harbors. We look forward to seeing those shareholders who are able to attend the annual meeting on May 20th.


			Sincerely,

			Alan S. McKim
			Executive Chairman of the Board

CLEAN HARBORS, INC.

42 Longwater Drive

Norwell, Massachusetts 02061

___________________________

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

___________________________

Notice is hereby given that the 2026 annual meeting of shareholders of Clean Harbors, Inc. (the “Company”) will be held at 10:00 a.m., local time, on Wednesday, May 20, 2026, at the Company’s training facility located at 101 Philip Drive, Norwell, Massachusetts.

The annual meeting is being held:

1. To elect four (4) Class I members of the Board of Directors of the Company to serve until the 2029 annual meeting of shareholders and until their respective successors are duly elected and qualified;

2. To hold a non-binding, advisory vote on the compensation of the Company’s named executive officers;

3. To ratify the selection of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026; and

4. To act upon such other business as may properly come before the meeting and any adjournment or postponement thereof.

Shareholders of record at the close of business on March 23, 2026, will be entitled to notice and to vote at the meeting.


			By order of the Board of Directors,

			Lisa R. Haddad, Secretary
			April 10, 2026
			Norwell, Massachusetts

YOUR VOTE IS IMPORTANT. WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING, PLEASE AUTHORIZE YOUR PROXY TO VOTE YOUR SHARES OVER THE INTERNET, BY TELEPHONE, OR BY MAIL AS DESCRIBED UNDER “GENERAL MATTERS - PROXY SOLICITATION” IN THE ATTACHED PROXY STATEMENT.

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON MAY 20, 2026: The Notice of Annual Meeting, Proxy Statement, and 2025 Annual Report to Shareholders (including the 2025 Annual Report on Form 10-K) are available for viewing, printing, and downloading at www.proxyvote.com.

TABLE OF CONTENTS



GENERAL MATTERS	1	COMPENSATION DISCUSSION AND
		ANALYSIS	25
BOARD OF DIRECTORS OVERVIEW	2	Introduction	25
Board Leadership Structure	2	Executive Summary	25
Corporate Governance Guidelines, Committee		2025 Performance Overview	28
Committee Charters, and		Role of the Compensation and Human
Code of Ethics and Business Conduct	3	Capital Committee	28
Director Independence	3	Consideration of Shareholder Responses	29
Limitation on Other Board Services	4	Compensation Philosophy and Objectives	29
Board Committees	5	Stock Ownership Guidelines	35
Audit Committee	6	Insider Trading Policy and
Compensation and Human Capital		Key Prohibited Transactions	35
Committee	6	Policies Related to Timing of Stock Option Grants	36
Corporate Governance and Sustainability		Clawback Policy	36
Committee	7	Employment, Termination of Employment, and
Environmental, Health, and Safety		Change of Control Agreements and
Committee	7	Arrangements	36
Ad Hoc Cyber Committee	8	Report of Compensation and Human
C&HC Committee Interlocks and		Capital Committee	38
Insider Participation	8
Communications to the Independent Directors	8	EXECUTIVE COMPENSATION TABLES	39
Board Oversight of Risk Management	8	Summary Compensation Table	39
Commitment to the Environment and		Grants of Plan-Based Awards	40
Sustainability	9	Outstanding Equity Awards at Fiscal Year-End	41
Executive Succession Planning	9	Option Exercises and Stock Vested	43
No Political Contributions	9	Potential Payments Upon Termination or Change
		of Control	44
ELECTION OF DIRECTORS	9	CEO Pay Ratio Information	45
Board Matrix	10	Appendix A: Reconciliation of GAAP Measure
Board Nomination Process	11	to Corresponding Non-GAAP Measure	46
Current Directors and Nominees	11	Appendix B: Financial Performance Measures
		Used in Incentive Compensation Plans	47
DIRECTOR COMPENSATION	19
		PAY VERSUS PERFORMANCE	49
EXECUTIVE OFFICERS	20
		RATIFICATION OF SELECTION OF
RELATED PARTY TRANSACTIONS	22	INDEPENDENT REGISTERED PUBLIC
		ACCOUNTING FIRM	54
ADVISORY VOTE ON EXECUTIVE		Selection of the Company’s Independent
COMPENSATION	23	Registered Public Accountant	54

SEC Form DEF 14A filed by Clean Harbors Inc.