Clean Harbors (CLH) director Karyn Polito awarded 460 common shares

Rhea-AI Filing Summary

Clean Harbors Inc. director Karyn Polito received a grant of 460 shares of Common Stock on May 11, 2026. The shares were awarded at $295.13 per share, described as a grant, award, or other acquisition rather than an open-market purchase. Following this award, Polito directly holds 3,475 shares of Clean Harbors common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Polito Karyn

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	460	$295.13	$136K

Holdings After Transaction: Common Stock — 3,475 shares (Direct, null)

Footnotes (1)

Key Figures

Shares granted: 460 shares Transaction price per share: $295.13 per share Shares owned after transaction: 3,475 shares

3 metrics

Shares granted 460 shares Common Stock grant on May 11, 2026

Transaction price per share $295.13 per share Recorded price for granted shares

Shares owned after transaction 3,475 shares Direct holdings after grant

Key Terms

Common Stock, Grant, award, or other acquisition, Form 4

3 terms

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.

Grant, award, or other acquisition financial

"transaction_code_description: "Grant, award, or other acquisition""

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

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^*

Polito Karyn

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/11/2026		A		460	A	$295.13	3,475	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:

	/s/ Karyrn Polito	05/13/2026
	** 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)

FAQ

What insider transaction did Clean Harbors (CLH) director Karyn Polito report?

Director Karyn Polito reported receiving a grant of 460 shares of Clean Harbors Common Stock. The transaction is coded as a grant, award, or other acquisition, indicating it is a compensation-related share award rather than an open-market purchase.

At what price were the shares in Karyn Polito’s Clean Harbors Form 4 transaction recorded?

The 460 shares of Clean Harbors Common Stock granted to Karyn Polito were recorded at $295.13 per share. This figure reflects the transaction price per share used for reporting purposes in the Form 4 filing for the award.

How many Clean Harbors shares does Karyn Polito hold after this Form 4 transaction?

After receiving the 460-share grant, Karyn Polito directly holds 3,475 shares of Clean Harbors Common Stock. This total share count is explicitly reported as the number of shares beneficially owned following the reported transaction in the filing.

Was Karyn Polito’s Clean Harbors Form 4 transaction a stock purchase or an award?

The transaction is classified as a grant, award, or other acquisition, not an open-market purchase. The Form 4 uses transaction code “A” and describes the action as a grant or award acquisition, indicating it is part of compensation or similar arrangements.

Is Karyn Polito’s ownership in Clean Harbors direct or indirect after this transaction?

Karyn Polito’s ownership is reported as direct following this transaction. The Form 4 lists the ownership type as direct and shows 3,475 shares of Common Stock beneficially owned directly after the 460-share grant.