Clean Harbors director granted 652 restricted shares

Stewart Shelley JR reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Stewart Shelley JR reported acquisition or exercise transactions in this Form 4 filing.

CLEAN HARBORS INC director Stewart Shelley Jr. reported a routine equity award. He received 652 shares of Common Stock as restricted stock granted for his service as a non-employee director.

The restricted stock vests 100% on the date of the next annual meeting of shareholders. Following this award, he directly holds 4,523 shares of Clean Harbors common stock. This was a compensation grant, not an open-market purchase.

Insider Trade Summary

Grant/Award: 652 shares

Grant/Award 1 txn

Insider Stewart Shelley JR

Role Director

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

Holdings After Transaction: Common Stock — 4,523 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 Shares owned after grant: 4,523 shares Grant price per share: $0.00 per share

3 metrics

Restricted stock grant 652 shares Award to non-employee director on May 20, 2026

Shares owned after grant 4,523 shares Director’s direct holdings following the award

Grant price per share $0.00 per share Compensation grant, no purchase price paid

Key Terms

restricted stock, non-employee director, annual meeting of shareholders, Grant, award, or other acquisition, +1 more

5 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"

annual meeting of shareholders financial

"vesting 100% upon the date of the next annual meeting of shareholders"

A yearly gathering where a company’s owners (shareholders) vote on key items like electing the board, approving executive pay, and ratifying auditors, and receive updates on performance and strategy. Think of it as an annual town hall for owners: it matters to investors because outcomes and disclosures can affect leadership, corporate direction, dividend and governance policies, and therefore the company’s risk and potential return.

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

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.

FAQ

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

What insider transaction did CLEAN HARBORS INC (CLH) report for Stewart Shelley Jr?

CLEAN HARVORS INC reported that director Stewart Shelley Jr received a grant of 652 restricted shares of common stock. This was a compensation-related award, not an open-market purchase, and reflects standard equity compensation for a non-employee director.

How many CLEAN HARBORS INC (CLH) shares does Stewart Shelley Jr hold after this Form 4?

After the award, Stewart Shelley Jr directly holds 4,523 shares of CLEAN HARBORS INC common stock. This total includes the new 652-share restricted stock grant reported, reflecting his updated direct ownership position as a non-employee director.

What are the vesting terms of the restricted stock granted to the CLEAN HARBORS INC (CLH) director?

The 652 restricted shares granted to the CLEAN HARBORS INC director vest 100% on the date of the next annual meeting of shareholders. Until vesting, the award is subject to service-based conditions tied to his role as a non-employee director.

Was the CLEAN HARBORS INC (CLH) director’s 652-share award an open-market stock purchase?

No, the 652-share transaction was not an open-market purchase. It was a grant of restricted stock classified as a “grant, award, or other acquisition,” representing equity compensation for the CLEAN HARBORS INC non-employee director’s board service.

What does the Form 4 transaction code mean for the CLEAN HARBORS INC (CLH) director grant?

The Form 4 uses transaction code “A” for the CLEAN HARBORS INC director, indicating a grant, award, or other acquisition. This confirms the 652 shares were issued as equity compensation rather than bought or sold in the open market.

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

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Accepted by SEC EDGAR 05/22/2026 - 11:47 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
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^*

Stewart Shelley JR

(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)
05/20/2026

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	4,523	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/ Shelley Stewart Jr.	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)