CWST (CWST) Sr VP executes 294-share sell-to-cover tax trades

Rhea-AI Filing Summary

CASELLA WASTE SYSTEMS INC senior executive reports small tax-related share sales. Sr VP & COO of SW Ops Sean Steves sold 197 shares of Class A Common Stock at $87.80 on March 16, 2026 and 97 shares at $89.71 on March 12, 2026, totaling 294 shares. According to the footnote, these were automatic “sell-to-cover” transactions to satisfy tax withholding on previously granted RSUs and were not discretionary sales. Following the trades, he directly holds 9,375 shares.

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).

X

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^*

Steves Sean

(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)
	Sr VP & COO of SW Ops

3. Date of Earliest Transaction (Month/Day/Year)
03/12/2026

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	03/12/2026		S(1)		97	D	$89.71	9,572	D
Class A Common Stock	03/16/2026		S(1)		197	D	$87.8	9,375	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 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 RSUs previously granted to the reporting person. 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.

Remarks:

	/s/ Sean Steves	03/16/2026
	** 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 insider transactions did CWST executive Sean Steves report on this Form 4?

Sean Steves reported two small open-market sales of Class A Common Stock, totaling 294 shares. The transactions occurred on March 12 and March 16, 2026, and were tied to tax withholding obligations from vesting RSUs rather than discretionary portfolio changes.

Why did CWST’s Sean Steves sell 294 shares of stock?

The sales were part of a “sell-to-cover” arrangement to satisfy tax withholding on vesting RSUs. A footnote explains the trades were executed under an automatic instruction adopted on August 2, 2023 and do not represent discretionary sales by the executive.

At what prices did CWST executive Sean Steves sell his shares?

He sold 97 shares of Class A Common Stock at $89.71 on March 12, 2026 and 197 shares at $87.80 on March 16, 2026. Both transactions are identified as open-market or private sales used to cover tax obligations on RSU vesting.

How many CWST shares does Sean Steves hold after these transactions?

After the reported sales, Sean Steves directly owns 9,375 shares of Casella Waste Systems Class A Common Stock. The Form 4 shows this post-transaction balance, providing context that the 294 shares sold represent a relatively small portion of his reported holdings.

Were the CWST share sales by Sean Steves pre-planned or discretionary?

The sales were pre-planned under an automatic sell-to-cover instruction adopted on August 2, 2023. The filing notes they were executed to cover tax withholding on RSU vesting and explicitly states they do not represent discretionary sales by the reporting person.