Clean Harbors CFO reports tax and forfeiture share moves

CLEAN HARBORS INC executive vice president and chief financial officer Eric J. Dugas reported two dispositions of common stock on March 13, 2026.

Rhea-AI Filing Summary

CLEAN HARBORS INC executive vice president and chief financial officer Eric J. Dugas reported two dispositions of common stock on March 13, 2026. First, 630 shares were withheld at $288.93 per share to pay tax liability upon vesting of equity awards under Rule 16b-3. Second, 1,324 shares of restricted stock were forfeited back to the company because performance targets under its Long Term Equity Incentive Program were not achieved. A footnote also indicates a correction to the total number of shares held, though the corrected balance is not stated here.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Dugas Eric J.

Role EVP CHIEF FINANCIAL OFFICER

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1, F2	630	$288.93	$182K
Disposition	Common Stock F3, F2	1,324	$0.00	$0.00

Holdings After Transaction: Common Stock — 18,067 shares (Direct)

Footnotes (3)

1. F1. Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b3.
2. F2. Correction to Total Number of Shares Held.
3. F3. Shares of restricted stock forfeited due to the Company not achieving performance targets under its Long Term Equity Incentive Program.

Key Figures

Shares withheld for taxes: 630 shares Tax withholding price: $288.93 per share Restricted shares forfeited: 1,324 shares

3 metrics

Shares withheld for taxes 630 shares Common stock withheld on March 13, 2026 to pay tax liability

Tax withholding price $288.93 per share Per-share value for 630 withheld shares used to satisfy tax liability

Restricted shares forfeited 1,324 shares Restricted stock forfeited due to unmet performance targets under LTIP

Key Terms

Rule 16b3, Long Term Equity Incentive Program, restricted stock, tax liability

4 terms

Rule 16b3 regulatory

"withholding of securities incident to vesting of securities in accordance with Rule 16b3"

Long Term Equity Incentive Program financial

"not achieving performance targets under its Long Term Equity Incentive Program"

restricted stock financial

"Shares of restricted stock forfeited due to the Company not achieving performance targets"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

tax liability financial

"Payment of tax liability by withholding of securities incident to vesting"

FAQ

What insider transactions did CLEAN HARBORS INC (CLH) report for Eric J. Dugas on March 13, 2026?

On March 13, 2026, EVP and CFO Eric J. Dugas reported two dispositions of CLEAN HARBORS INC common stock: 630 shares withheld for tax liability and 1,324 restricted shares forfeited back to the company.

How many CLEAN HARBORS INC (CLH) shares were withheld for taxes from Eric J. Dugas?

Eric J. Dugas had 630 shares of CLEAN HARBORS INC common stock withheld at $288.93 per share as payment of tax liability related to vesting of equity awards in accordance with Rule 16b-3.

Why were 1,324 CLEAN HARBORS INC (CLH) shares forfeited by Eric J. Dugas?

The filing states that 1,324 shares of restricted stock were forfeited because CLEAN HARBORS INC did not achieve performance targets under its Long Term Equity Incentive Program for those awards.

Did Eric J. Dugas sell CLEAN HARBORS INC (CLH) shares on the open market?

The reported transactions are a tax-withholding of 630 shares and a forfeiture to the issuer of 1,324 restricted shares. The Form 4/A does not describe open-market sales in these entries.

What does the correction footnote mean in the CLEAN HARBORS INC (CLH) Form 4/A for Eric J. Dugas?

A footnote explains there is a correction to the total number of shares held by Eric J. Dugas. The amended Form 4/A signals this correction but does not state the updated holdings figure in the provided data.

Was a Rule 10b5-1 trading plan involved in Eric J. Dugas’s CLEAN HARBORS INC (CLH) transactions?

The filing indicates the Rule 10b5-1 checkbox is not affirmed (aff_10b5_one is false). The reported tax-withholding and forfeiture transactions are not identified as being executed under a Rule 10b5-1 trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/14/2026 - 09:07 AM Accepted by SEC EDGAR 08/14/2026 - 09:06 AM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Dugas Eric J.

(Last) (First) (Middle)

C/O CLEAN HARBORS, INC.

42 LONGWATER DRIVE

(Street)

NORWELL MASSACHUSETTS 02061

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CLEAN HARBORS INC [ CLH ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP CHIEF FINANCIAL OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)
03/17/2026

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/13/2026		F		630(1)	D	$288.93	19,391(2)	D
Common Stock	03/13/2026		D		1,324(3)	D	$0	18,067(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b3.

2. Correction to Total Number of Shares Held.

3. Shares of restricted stock forfeited due to the Company not achieving performance targets under its Long Term Equity Incentive Program.

	/s/ Eric J. Dugas	08/14/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)