Clean Harbors (CLH) EVP Weber reports 814-share tax withholding, holds 47,914 shares

Filing Impact

(Moderate)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

CLEAN HARBORS INC executive Brian P. Weber reported a routine tax-related share disposition. On July 1, 2026, 814 shares of common stock were withheld at $290.74 per share to cover tax liabilities tied to vesting, as permitted under Rule 16b-3. Following this withholding, Weber directly holds 47,914 shares of common stock, so the withheld amount represents only a fraction of his overall position and does not reflect an open-market sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Weber Brian P

Role EVP (CHESI)

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	814	$290.74	$237K

Holdings After Transaction: Common Stock — 47,914 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares withheld for taxes: 814 shares Withholding price per share: $290.74/share Shares held after transaction: 47,914 shares

3 metrics

Shares withheld for taxes 814 shares Tax-withholding disposition on July 1, 2026

Withholding price per share $290.74/share Price used for tax-withholding transaction

Shares held after transaction 47,914 shares Direct holdings of Brian P. Weber after tax withholding

Key Terms

tax-withholding disposition, Rule 16b-3, vesting of securities, Common Stock

4 terms

tax-withholding disposition financial

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

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Rule 16b-3 regulatory

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

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

vesting of securities financial

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

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/06/2026 - 03:13 PM Accepted by SEC EDGAR 07/06/2026 - 03:12 PM

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^*

Weber Brian P

(Last)

(First)

(Middle)

27 INDEPENDENCE DRIVE

(Street)

WALPOLE

MASSACHUSETTS

02081

(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 (CHESI)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

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)

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	07/01/2026		F		814⁽¹⁾	D	$290.74	47,914	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

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

	/s/ Brian P. Weber	07/06/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did CLEAN HARBORS (CLH) report for Brian P. Weber?

Brian P. Weber had 814 CLEAN HARBORS shares withheld to satisfy tax obligations on vesting. The shares were not sold on the open market but retained by the company to cover his tax liability.

Was the CLEAN HARBORS (CLH) Form 4 transaction an open-market sale?

No, the Form 4 for CLEAN HARBORS shows a tax-withholding disposition, not an open-market sale. Shares were withheld by the company to pay taxes triggered by the vesting of equity awards.

How many CLEAN HARBORS (CLH) shares were withheld for taxes in this Form 4?

The Form 4 reports that 814 shares of CLEAN HARBORS common stock were withheld. This withholding covered Brian P. Weber’s tax liability from vesting equity, rather than representing a discretionary share sale.

What is Brian P. Weber’s CLEAN HARBORS (CLH) shareholding after the tax withholding?

After the tax withholding, Brian P. Weber directly holds 47,914 shares of CLEAN HARBORS common stock. This indicates he retains a substantial equity position even after the 814-share tax-withholding disposition.

What does transaction code “F” mean on the CLEAN HARBORS (CLH) Form 4?

Transaction code “F” indicates a tax-withholding disposition, where shares are delivered to the issuer to pay taxes. In this case, CLEAN HARBORS withheld 814 shares from Brian P. Weber upon vesting of equity awards.

Why does the CLEAN HARBORS (CLH) Form 4 reference Rule 16b-3?

The Form 4 notes the tax payment occurred under Rule 16b-3, which governs certain insider transactions. This rule allows tax-withholding and similar transactions related to equity compensation without treating them as typical open-market trades.