William Blair & Company’s Casella Waste Systems CWST Stock Holding History

William Blair & Company’s Portfolio CWST Stock Details CWST Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$16.7M	Sell	171,981 -118,483	-41%	-$10.1M	0.04%	287
2026 Q1	$23M	Buy	290,464 +11,343	+4%	+$1.09M	0.07%	226
2025 Q4	$27.3M	Buy	279,121 +11,143	+4%	+$1.03M	0.07%	195
2025 Q3	$25.4M	Buy	267,978 +94,453	+54%	+$9.51M	0.07%	204
2025 Q2	$20M	Buy	173,525 +21,504	+14%	+$2.48M	0.06%	228
2025 Q1	$17M	Buy	152,021 +121,825	+403%	+$13.3M	0.05%	242
2024 Q4	$3.2M	Buy	30,196 +22,726	+304%	+$2.4M	0.01%	603
2024 Q3	$743K	Buy	7,470 +3	+0%	+$311	﹤0.01%	996
2024 Q2	$741K	Hold	7,467	–	–	﹤0.01%	974
2024 Q1	$738K	Hold	7,467	–	–	﹤0.01%	974
2023 Q4	$638K	Hold	7,467	–	–	﹤0.01%	1005
2023 Q3	$570K	Hold	7,467	–	–	﹤0.01%	1016
2023 Q2	$675K	Sell	7,467 -53	-0.7%	-$4.73K	﹤0.01%	965
2023 Q1	$622K	Buy	7,520 +1,488	+25%	+$118K	﹤0.01%	968
2022 Q4	$478K	Buy	6,032 +54	+0.9%	+$4.33K	﹤0.01%	1054
2022 Q3	$457K	Buy	5,978 +1,030	+21%	+$82.6K	﹤0.01%	1072
2022 Q2	$360K	Sell	4,948 -223	-4%	-$17K	﹤0.01%	1194
2022 Q1	$453K	Buy	+5,171	New	+$412K	﹤0.01%	1195

Other funds holding CWST

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

CCA

Conestoga Capital Advisors Wayne, Pennsylvania $4.6B AUM 16.08% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

William Blair & Company's CWST Position: Q2 2026 in Review

William Blair & Company reduced its Casella Waste Systems (CWST) stake by 41% in Q2 2026, selling an estimated $10.1M and leaving 171,981 shares worth $16.7M. The position accounts for 0.04% of the portfolio, ranked #287.

William Blair & Company first reported a position in CWST in Q1 2022 and has held it in 18 quarters since. The position peaked at $27.3M in Q4 2025. 417 funds tracked by Wall St. Rank hold CWST as of Q2 2026.

William Blair & Company held 171,981 shares of Casella Waste Systems worth $16.7M as of Q2 2026.
William Blair & Company sold 118,483 Casella Waste Systems shares in Q2 2026, an estimated $10.1M.
Casella Waste Systems made up 0.04% of William Blair & Company's portfolio in Q2 2026, its #287 holding.
William Blair & Company first reported a position in Casella Waste Systems in Q1 2022 and has held it in 18 quarters since.
William Blair & Company's Casella Waste Systems position peaked at $27.3M in Q4 2025.
417 funds tracked by Wall St. Rank held Casella Waste Systems as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.