Granahan Investment Management, LLC
Position in CWST — Casella Waste Systems Inc
CIK 1026710
WALTHAM, MA
Position in CWST
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$19,855,787
-$5,384,820 QoQ
Shares Held
250,262
-2.9% QoQ
Ownership
0.393%
of shares outstanding
% of Portfolio
0.96%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 89%
Shared 0%
None 11%
Common Shares in CWST Over Time
Shares Held
Position Value (USD)
Position in Waste Management
Industrials · as of Mar 31, 2026Granahan Investment Management, LLC holds $25,148,504 across 2 Waste Management names. CWST ranks #1 (79.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | CWST |
Casella Waste Systems Inc
This page
|
250,262 | $19,855,787 | |
| 2 | ONT |
Onterris, Inc.
|
241,787 | $5,292,717 |
All Filings in CWST
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25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $19,855,787 | 250,262 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $25,240,607 | 257,715 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $29,824,958 | 314,344 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $36,045,635 | 312,408 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $38,245,476 | 342,978 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $39,395,285 | 372,321 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $38,944,863 | 391,445 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $26,161,337 | 263,670 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $33,118,879 | 334,974 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $29,597,618 | 346,333 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $25,317,789 | 331,819 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $25,734,110 | 284,512 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $25,384,307 | 307,093 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $20,340,873 | 256,473 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $22,517,098 | 294,765 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $15,075,212 | 207,419 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $15,045,385 | 171,653 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $9,333,416 | 109,265 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $13,114,002 | 172,689 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $12,441,287 | 196,142 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $8,400,966 | 132,153 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $8,480,273 | 136,889 | Shares | Sole | 2021-02-12 | |
| 2020-09-30 | $7,419,504 | 132,847 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $7,325,049 | 140,542 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $3,440,951 | 88,094 | Shares | Sole | 2020-05-12 | |
| No filing history on record for this holder in this stock. | ||||||