Form 4 for CWST CASELLA WASTE SYSTEMS INC

Accepted 2026-03-24 00:00:00 ET · period of report 2026-03-17 · accession 0001055353-26-000002 · 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
MI	2026-03-24	2026-03-17+	CWST	CASELLA DOUGLAS R	VICE COB, BD OF DIRECTORS, Dir	G - Gift	$0.00	+40.0K	24.1K	New	$0
	2026-03-24	2026-03-18	CWST	CASELLA DOUGLAS R	VICE COB, BD OF DIRECTORS, Dir	G - Gift	$0.00	-40.0K	129.0K	-24%	$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 B Common Stock	2026-03-17	G	A	33,000	$0.00	164,000	I	—	—
2	Common	Class B Common Stock	2026-03-18	G	A	40,000	$0.00	177,000	I By Spouse	—	—	(F4) Held by Mr. Casella's spouse. Mr. Casella disclaims beneficial ownership of the securities indicated to the extent to which he does not have an actual pecuniary interest in such securities.
3	Common	Class B Common Stock	2026-03-17	G	D	33,000	$0.00	24,100	I By SLAT	—	—	(F5) Held by the SLAT for the benefit of Mr. Casella's spouse. Mr. Casella is the trustee of the SLAT. The trustee of the SLAT was incorrectly identified in prior filings as Mr. Casella's spouse. Mr. Casella disclaims beneficial ownership of the securities indicated to the extent to which he does not have an actual pecuniary interest in such securities.
4	Common	Class B Common Stock	2026-03-18	G	D	40,000	$0.00	129,000	D By SLAT 2	—	—	(F2) Held by the SLAT 2 for the benefit of Mr. Casella. Mr. Casella's spouse is the trustee of the SLAT 2. The trustee of SLAT 2 was incorrectly identified in prior filings as Mr. Casella.