Casella Waste Systems, Inc. (CWST) ownership: Conestoga Capital Advisors, LLC 8% · institutions 120% (13F 2026-03-31). Insider activity, 90 days: 4 sales, 0 open-market buys. 1 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| BlackRock | 9047272.00 | $717.81M | 14.2% | 2026-03-31 |
| Vanguard | 6695615.00 | $531.23M | 10.5% | 2026-03-31 |
| Capital Group | 4720078.00 | $374.49M | 7.4% | 2026-03-31 |
| Conestoga Capital Advisors, LLC | 2804475.00 | $222.51M | 4.4% | 2026-03-31 |
| Wasatch Advisors LP | 2582220.00 | $204.87M | 4.1% | 2026-03-31 |
| State Street | 2389197.00 | $189.56M | 3.8% | 2026-03-31 |
| T. Rowe Price | 1699490.00 | $134.84M | 2.7% | 2026-03-31 |
| Invesco | 1653438.00 | $131.18M | 2.6% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-08-26 | |
| Sell | null | 2026-08-13 | |
| Sell | null | 2026-08-13 | |
| Sell | null | 2026-08-13 | |
| Sell | null | 2026-08-11 | |
| Sell | null | 2026-06-08 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.