WESTFIELD CAPITAL MANAGEMENT CO LP
Position in CWST — Casella Waste Systems Inc
CIK 1177719
BOSTON, MA
Position in CWST
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$78,790,549
+$13,534,034 QoQ
Shares Held
812,525
-1.2% QoQ
Ownership
1.28%
of shares outstanding
% of Portfolio
0.26%
of 13F equity value
Holder Rank
#25
of 417 holders
Holding Since
Dec 2022
15 quarters on record
Voting authority
Sole 95%
Shared 0%
None 5%
Common Shares in CWST Over Time
Shares Held
Position Value (USD)
Position in Waste Management
Industrials · as of Jun 30, 2026WESTFIELD CAPITAL MANAGEMENT CO LP holds $159,703,951 across 3 Waste Management names. CWST ranks #2 (49.3% of the industry book) .
All Filings in CWST
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15 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $78,790,549 | 812,525 | Shares | Sole | 2026-08-12 | |
| 2026-03-31 | $65,256,515 | 822,492 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $163,092,234 | 1,665,226 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $156,353,416 | 1,647,907 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $179,105,181 | 1,552,307 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $168,139,572 | 1,507,843 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $160,863,260 | 1,520,303 | Shares | Sole | 2025-02-11 | |
| 2024-09-30 | $94,563,653 | 950,484 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $90,371,361 | 910,818 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $83,842,946 | 848,012 | Shares | Sole | 2024-05-10 | |
| 2023-12-31 | $64,227,719 | 751,553 | Shares | Sole | 2024-02-09 | |
| 2023-09-30 | $45,146,938 | 591,703 | Shares | Sole | 2023-11-13 | |
| 2023-06-30 | $49,945,314 | 552,187 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $31,300,614 | 378,667 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $17,356,834 | 218,848 | Shares | Sole | 2023-02-13 | |
| No filing history on record for this holder in this stock. | ||||||