Casella Waste Systems Inc

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CWST

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/9/2026

Shares

1,468,206

Value ($000)

143,796

Weight

0.4%

2019 Q4 - 2025 Q4 (25 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/9/2026	143,796	0.4%	1,468,206	12/31/2025
2025 Q3	11/12/2025	171,720	0.4%	1,809,867	9/30/2025
2025 Q2	7/29/2025	207,702	0.6%	1,800,155	6/30/2025
2025 Q1	5/9/2025	247,136	0.7%	2,216,265	3/31/2025
2024 Q4	2/10/2025	279,391	0.7%	2,640,498	12/31/2024
2024 Q3	11/8/2024	263,859	0.7%	2,652,112	9/30/2024
2024 Q2	8/8/2024	264,595	0.7%	2,666,749	6/30/2024
2024 Q1	5/8/2024	263,960	0.7%	2,669,770	3/31/2024
2023 Q4	2/9/2024	247,843	0.7%	2,900,110	12/31/2023
2023 Q3	11/9/2023	232,506	0.8%	3,047,265	9/30/2023
2023 Q2	8/11/2023	270,644	0.9%	2,992,199	6/30/2023
2023 Q1	5/12/2023	242,845	0.8%	2,937,883	3/31/2023
2022 Q4	2/9/2023	193,482	0.7%	2,439,565	12/31/2022
2022 Q3	11/9/2022	190,487	0.8%	2,493,615	9/30/2022
2022 Q2	8/10/2022	152,086	0.6%	2,092,536	6/30/2022
2022 Q1	5/11/2022	181,788	0.5%	2,074,017	3/31/2022
2021 Q4	2/14/2022	53,272	0.1%	623,647	12/31/2021
2021 Q3	11/10/2021	59,721	0.2%	786,428	9/30/2021
2021 Q2	8/12/2021	49,334	0.2%	777,768	6/30/2021
2021 Q1	5/13/2021	50,589	0.2%	795,807	3/31/2021
2020 Q4	2/9/2021	45,285	0.2%	730,988	12/31/2020
2020 Q3	11/6/2020	35,191	0.1%	630,100	9/30/2020
2020 Q2	8/12/2020	27,597	0.1%	529,490	6/30/2020
2020 Q1	5/8/2020	23,719	0.1%	607,248	3/31/2020
2019 Q4	2/12/2020	24,866	0.1%	540,210	12/31/2019