[Form 4] Clean Harbors, Inc Insider Trading Activity

Rhea-AI Filing Summary

Director Andrea Robertson submitted a Form 4 showing one insider transaction in Clean Harbors, Inc. (CLH). On 07/31/2025 she sold 836 common shares at $233.64, a cash value of roughly $195k. After the sale, she retains 9,888 directly-held shares. No derivative positions or 10b5-1 plan designations were disclosed. The trade represents a modest reduction in holdings, suggesting routine portfolio management rather than a material shift in ownership.

Positive

• Director still holds 9,888 shares, maintaining meaningful alignment with shareholder interests.

Negative

• Insider sale—836 shares at $233.64 may be interpreted as a slight decrease in insider confidence, albeit small.

Insights

Securities Analyst

TL;DR: Small director sale; holding remains sizable—market impact likely minimal.

This Form 4 signals a minor disposition: 836 shares equal to a fraction of Andrea Robertson’s remaining 9,888-share stake. With no associated option exercise or 10b5-1 plan, the move could reflect personal liquidity needs rather than a view on Clean Harbors’ fundamentals. Given the limited volume relative to average daily turnover, I view the filing as neutral for investors.

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^*

Robertson Andrea

(Last) (First) (Middle)

150 OCEAN LANE DRIVE, APT 3E

(Street)

KEY BISCAYNE FL 33149

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
07/31/2025

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

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

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

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	07/31/2025		S		836	D	$233.64	9,888	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/ Andrea Robertson	08/04/2025
	** 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.

FAQ

How many Clean Harbors (CLH) shares did the director sell?

Andrea Robertson sold 836 common shares on 07/31/2025.

At what price were the CLH shares sold?

The sale was executed at $233.64 per share.

How many CLH shares does the director still own after the sale?

Robertson directly owns 9,888 shares following the reported transaction.

Were any derivative securities involved in this Form 4 filing for CLH?

No, the filing shows no derivative securities acquired or disposed of.

Was the transaction made under a Rule 10b5-1 trading plan?

The form does not indicate that the sale was executed under a 10b5-1 plan.