Casella Waste Systems (CWST) president logs PSU vesting and tax sell-to-cover

Rhea-AI Filing Summary

Casella Waste Systems president Edmond Coletta reported a performance-based equity vesting and related tax sale. On February 26, 2026, Coletta acquired 9,810 shares of Class A Common Stock at $0.00 per share upon vesting of performance-based stock units granted on March 10, 2023, after achievement of specified 2025 performance objectives and a total shareholder return multiplier for 2023–2025.

On February 27, 2026, 3,812 shares were sold in an open-market “sell-to-cover” transaction at a weighted average price of about $93.70 per share, solely to satisfy tax withholding obligations under an automatic instruction adopted on August 2, 2023, and not as a discretionary sale. Following these transactions, Coletta directly owned 147,091 shares of Class A Common Stock.

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

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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^*

Coletta Edmond

(Last) (First) (Middle)

25 GREENS HILL LANE

(Street)

RUTLAND VT 05701

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CASELLA WASTE SYSTEMS INC [ CWST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

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
Class A Common Stock	02/26/2026		A		9,810(1)	A	$0	150,903	D
Class A Common Stock	02/27/2026		S(2)		3,812	D	$93.7(3)	147,091	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. Represents shares of Class A Common Stock acquired by the reporting person upon the vesting of performance-based stock units (PSUs) granted to the reporting person on March 10, 2023, as a result of the level of achievement by Casella Waste Systems, Inc. of certain performance objectives during the period running from January 1, 2025 through December 31, 2025, and a multiplier based on relative total shareholder return for the period running from January 1, 2023 to December 31, 2025, as certified by the issuer's compensation and human capital committee on February 26, 2026.

2. Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of PSUs previously granted to the reporting person on March 10, 2023. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on August 2, 2023 and does not represent a discretionary sale by the reporting person.

3. Represents the weighted average sales price for shares sold in multiple transactions, ranging from $93.69 to $93.86. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

Remarks:

	/s/ Edmond R. Coletta	03/02/2026
	** 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.

FAQ

What did Casella Waste Systems (CWST) president Edmond Coletta report on this Form 4?

Edmond Coletta reported vesting of performance-based stock units into 9,810 Class A shares and a related sale of 3,812 shares to cover taxes. These transactions reflect equity compensation settlement rather than a discretionary open-market trading decision.

How many Casella Waste Systems (CWST) shares did Edmond Coletta acquire and at what cost?

Coletta acquired 9,810 Class A Common Stock shares at a price of $0.00 per share upon vesting of performance-based stock units granted March 10, 2023, after meeting specified company performance goals and total shareholder return conditions through December 31, 2025.

Why did Edmond Coletta sell Casella Waste Systems (CWST) shares and how many were sold?

Coletta sold 3,812 Class A shares in a sell-to-cover transaction to satisfy tax withholding obligations from the PSU vesting. The sale followed an automatic sell-to-cover instruction adopted August 2, 2023 and was not a discretionary sale decision.

What was the sale price range for Edmond Coletta’s Casella Waste Systems (CWST) tax-related share sale?

The 3,812 Class A shares were sold at a weighted average price of about $93.70 per share, with individual sale prices ranging from $93.69 to $93.86. The reporting person can provide detailed trade-by-trade data upon authorized request.

How many Casella Waste Systems (CWST) shares does Edmond Coletta own after these transactions?

After the reported vesting and tax-related sale, Coletta directly owned 147,091 shares of Casella Waste Systems Class A Common Stock. This figure reflects his direct holdings immediately following the February 27, 2026 sell-to-cover transaction.

What performance period determined Edmond Coletta’s PSU vesting at Casella Waste Systems (CWST)?

The PSU vesting was based on company performance from January 1, 2025 through December 31, 2025 and a relative total shareholder return multiplier covering January 1, 2023 through December 31, 2025, as certified by the compensation and human capital committee on February 26, 2026.