Form 4 for CWST CASELLA WASTE SYSTEMS INC

Accepted 2026-03-02 00:00:00 ET · period of report 2026-02-26 · accession 0001055352-26-000002 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
	2026-03-02	2026-02-27	CWST	CASELLA JOHN W	CEO, Dir	S - Sale	$93.10	-6,726	28.0K	-19%	-$626.2K
	2026-03-02	2026-02-26	CWST	CASELLA JOHN W	CEO, Dir	A - Grant	$0.00	+23.3K	34.7K	+204%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Class A Common Stock	2026-02-27	S	D	6,726	$93.10	27,989	D	—	—	(F3) Represents the weighted average sales price for shares sold in multiple transactions, ranging from $93.00 to $93.68. 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.
2	Common	Class A Common Stock	2026-02-26	A	A	23,299	$0.00	34,715	D	—	—	(F1) 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.