Clean Harbors director granted 652 restricted shares

Robertson Andrea reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Robertson Andrea reported acquisition or exercise transactions in this Form 4 filing.

Clean Harbors director Andrea Robertson received a grant of 652 shares of common stock as compensation. The award was granted at no cash cost per share and is structured as restricted stock. These shares will vest 100% on the date of the company’s next annual meeting of shareholders.

Following this grant, Robertson directly holds a total of 9,768 shares of Clean Harbors common stock. This is a routine equity award to a non-employee director rather than an open-market purchase or sale.

Insider Trade Summary

Grant/Award: 652 shares

Grant/Award 1 txn

Insider Robertson Andrea

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	652	$0.00	$0.00

Holdings After Transaction: Common Stock — 9,768 shares (Direct)

Footnotes (1)

1. F1. Award of restricted stock to non-employee director vesting 100% upon the date of the next annual meeting of shareholders.

Key Figures

Restricted stock grant: 652 shares Grant price: $0.0000 per share Total shares after grant: 9,768 shares +1 more

4 metrics

Restricted stock grant 652 shares Non-employee director award on 2026-05-20

Grant price $0.0000 per share Equity compensation, no cash paid by director

Total shares after grant 9,768 shares Director’s direct holdings following transaction

Vesting condition 100% at next annual meeting Restricted stock vesting schedule from footnote

Key Terms

restricted stock, non-employee director, Grant, award, or other acquisition, Form 4

4 terms

restricted stock financial

"Award of restricted stock to non-employee director vesting 100% upon the date"

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.

non-employee director financial

"Award of restricted stock to non-employee director vesting 100% upon"

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Clean Harbors (CLH) director Andrea Robertson report on this Form 4?

Andrea Robertson reported receiving 652 shares of Clean Harbors common stock as a restricted stock award. The shares were granted at no cash cost and represent routine equity compensation for her role as a non-employee director.

Is the transaction on this Clean Harbors (CLH) Form 4 a stock purchase or a grant?

The transaction is a grant of restricted stock, not an open-market purchase. Robertson received 652 shares as a compensation award, consistent with the Form 4 code A for grant, award, or other acquisition reported at a price of $0.0000 per share.

When do Andrea Robertson’s new restricted shares in Clean Harbors (CLH) vest?

The 652 restricted shares vest 100% on the date of Clean Harbors’ next annual meeting of shareholders. Until vesting, the award remains subject to service-based conditions typical for non-employee director equity compensation programs.

How many Clean Harbors (CLH) shares does Andrea Robertson hold after this Form 4 transaction?

After the restricted stock grant, Andrea Robertson directly holds 9,768 shares of Clean Harbors common stock. This total includes the newly awarded 652 restricted shares and reflects her direct ownership position reported in the Form 4.

Does this Clean Harbors (CLH) Form 4 indicate any stock sales by Andrea Robertson?

No stock sales are reported in this Form 4. The filing only shows a single acquisition transaction, a grant of 652 restricted shares, with no disposition, sale, tax withholding, or derivative exercise activity disclosed for the reported date.

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

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Accepted by SEC EDGAR 05/22/2026 - 11:36 AM EDT 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
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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 FLORIDA 33149

(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)
05/20/2026

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	05/20/2026		A		652(1)	A	$0	9,768	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. Award of restricted stock to non-employee director vesting 100% upon the date of the next annual meeting of shareholders.

	/s/ Andrea Robertson	05/22/2026
	** 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)