Casella Waste Systems, Inc.
Casella Waste Systems, Inc. (CWST) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CWST · as of Sep 30, 2025
Ownership Breakdown
394
Institutional Holders
▼ 1 vs Q2
$6.29B
Total Inst. Value
▼ $1.27B vs Q2
62.62M
Shares Outstanding
freeFloat 99.36%
66.38M
13F Shares Held
▲ 924,080 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CWST largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC refuse systems | 5.99M | 9.44% | 9.44% | $568.67B | Nov 7, 2025 | ▼ 76.4K |
BLACKROCK, INC. refuse systems | 4.57M | 7.20% | 7.20% | $433.24B | Nov 12, 2025 | ▼ 79.4K |
WASATCH ADVISORS LP refuse systems | 3.71M | 5.84% | 5.84% | $351.87B | Nov 14, 2025 | ▲ 296.4K |
CONESTOGA CAPITAL ADVISORS, LLC refuse systems | 2.88M | 4.53% | 4.53% | $272.88B | Oct 24, 2025 | ▲ 195.9K |
INVESCO LTD. refuse systems | 2.40M | 3.79% | 3.79% | $228.07B | Nov 13, 2025 | ▼ 193.8K |
CAPITAL RESEARCH GLOBAL INVESTORS refuse systems | 2.01M | 3.17% | 3.17% | $190.79B | Nov 13, 2025 | ▲ 566.9K |
CAPITAL INTERNATIONAL INVESTORS refuse systems | 1.96M | 3.08% | 3.08% | $185.68B | Nov 13, 2025 | ▼ 3.1K |
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC refuse systems | 1.81M | 2.85% | 2.85% | $171.72B | Nov 12, 2025 | ▲ 9.7K |
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. refuse systems | 1.71M | 2.69% | 2.69% | $161.98B | Nov 14, 2025 | ▲ 660.6K |
JPMORGAN CHASE & CO refuse systems | 1.66M | 2.61% | 2.61% | $157.14B | Nov 26, 2025 | ▼ 53.7K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
33
Increased
+4.46M shares0
New Positions
first time holders17
Decreased
−1.43M shares0
Sold Out
fully exitedNet shares change (top 50)
+3.04M
+4.46M / −1.43M
Net new holders
+16
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CWST insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
10
Buy transactions
6
Sell transactions
1.67
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
CASELLA DOUGLAS R VICE CHAIRMAN, BD OF DIRECTORS | Jun 4, 2026 | Award | 1,793 | $83.65 | $150.0K | 106.6K | Form 4 ↗ |
BURKE MICHAEL K director | Jun 4, 2026 | Award | 1,793 | $83.65 | $150.0K | 15.8K | Form 4 ↗ |
Battles Michael Louis director | Jun 4, 2026 | Award | 1,793 | $83.65 | $150.0K | 10.3K | Form 4 ↗ |
Green Emily Nagle director | Jun 4, 2026 | Award | 1,793 | $83.65 | $150.0K | 17.5K | Form 4 ↗ |
Sova Gary director | Jun 4, 2026 | Award | 1,793 | $83.65 | $150.0K | 8.2K | Form 4 ↗ |
HULLIGAN WILLIAM P director | Jun 4, 2026 | Award | 1,793 | $83.65 | $150.0K | 8.2K | Form 4 ↗ |
DOODY JOSEPH director | Jun 4, 2026 | Award | 1,793 | $83.65 | $150.0K | 13.1K | Form 4 ↗ |
Kirk Rose M. director | Jun 4, 2026 | Award | 1,793 | $83.65 | $150.0K | 9.8K | Form 4 ↗ |
CASELLA DOUGLAS R VICE CHAIRMAN, BD OF DIRECTORS | Mar 18, 2026 | Gift | 40,000 | — | — | 171.0K | Form 4 ↗ |
CASELLA DOUGLAS R VICE CHAIRMAN, BD OF DIRECTORS | Mar 17, 2026 | Gift | 33,000 | — | — | 170.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Casella Waste Systems, Inc. (CWST) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 0.64%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Casella Waste Systems, Inc. is VANGUARD GROUP INC, holding approximately 5.99 million shares — equal to 9.44% of outstanding shares — as of September 30, 2025.
A total of 394 institutional investors currently hold CWST stock, with a combined institutional value of approximately $6.29 billion as of the most recent 13F filing period.
Frequently asked questions
CWST ownershipCasella Waste Systems, Inc. (CWST) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is VANGUARD GROUP INC with a 9.44% stake. Company insiders hold 0.64%. Data sourced from SEC Form 13F as of September 30, 2025.