CWST · Insider trading · 13F holders · Congress trades
Casella Waste Systems Inc (CWST)
Who is buying and selling CWST: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 26
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $1.7M
- Congress trades, 12 months
- 1
CWST at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 2 CWST insiders filed 3 sales worth $1.7M on SEC Form 4, and no open-market purchases.
- 26 13F filers hold CWST among their 50 largest positions, worth $1.1B combined. The biggest bets by portfolio weight are Hallstatt Advisors L.P. (12.9%), P2 Capital Partners, LLC (5.8%) and Conestoga Capital Advisors, LLC (4.9%). In their latest 13Fs, 3 managers opened a new position and 4 added to one.
- Members of Congress have disclosed 3 CWST trades since 2019, 0 purchases and 1 sale in the past year; the latest was Jefferson Shreve (R-IN), selling $50K–100K on May 12, 2025.
- CWST last closed at $90.31 on Oct 29, 2026.
CWST insider trading
Between Aug 1, 2026 and Oct 29, 2026, 2 CWST insiders filed 3 sales worth $1.7M on SEC Form 4, and no open-market purchases.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Sep 3, 2026 | Burke Michael K | Director | Sale | 1,100 | $95.26 | $105K | SEC |
| Aug 26, 2026 | Burke Michael K | Director | Sale | 1,100 | $92.99 | $102K | SEC |
| Aug 14, 2026 | Casella Douglas R | VICE CHAIRMAN, BD OF DIRECTORS, Director | Sale | 16,500 | $91.05 | $1.5M | SEC |
Who owns CWST? Hedge funds and superinvestors
26 13F filers hold CWST among their 50 largest positions, worth $1.1B combined. The biggest bets by portfolio weight are Hallstatt Advisors L.P. (12.9%), P2 Capital Partners, LLC (5.8%) and Conestoga Capital Advisors, LLC (4.9%). In their latest 13Fs, 3 managers opened a new position and 4 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Wasatch Advisors LPAsset manager | 1.8% | $245.6M | 3,056,089 | -13.5% shares | Q3 2026 |
| Conestoga Capital Advisors, LLCMutual fund manager | 4.9% | $226.5M | 2,336,156 | -16.7% shares | Q2 2026 |
| Silvercrest Asset Management Group LLCWealth manager | 0.8% | $114.6M | 1,181,941 | -5.6% shares | Q2 2026 |
| Geneva Capital Management LLCAsset manager | 2.0% | $88.4M | 911,153 | -21.7% shares | Q2 2026 |
| TimesSquare Capital Management, LLCHedge fund | 0.7% | $48.8M | 503,732 | -12.3% shares | Q2 2026 |
| Df Dent & Co IncInvestment manager | 0.8% | $43.3M | 446,270 | — | Q2 2026 |
| Granahan Investment Management, LLCAsset manager | 1.5% | $42.3M | 436,289 | +74.3% shares | Q2 2026 |
| Segall Bryant & Hamill, LLCInstitutional asset manager | 0.5% | $42.0M | 432,823 | +1.4% shares | Q2 2026 |
| Ranger Investment Management, L.P.Institutional asset manager | 2.0% | $32.0M | 330,460 | -3.3% shares | Q2 2026 |
| Harvey Partners, LLCInstitutional asset manager | 2.1% | $30.1M | 310,131 | +10.2% shares | Q2 2026 |
| Kennedy Capital Management LLCInstitutional asset manager | 0.5% | $26.5M | 272,908 | — | Q2 2026 |
| Hallstatt Advisors L.P.Hedge fund | 12.9% | $18.4M | 189,527 | +14.6% shares | Q2 2026 |
| Aristotle Capital Boston, LLCAsset manager | 1.2% | $17.8M | 183,143 | -6.5% shares | Q2 2026 |
| SG Capital Management LLCHedge fund | 1.5% | $17.0M | 175,543 | — | Q2 2026 |
| Granite Investment Partners, LLCWealth manager | 0.8% | $15.8M | 163,245 | -0.2% shares | Q2 2026 |
| P2 Capital Partners, LLCHedge fund | 5.8% | $14.3M | 147,236 | New | Q2 2026 |
| Summit Creek Advisors LLCInstitutional asset manager | 3.3% | $9.6M | 98,633 | -47.2% shares | Q2 2026 |
| Catawba River CapitalWealth manager | 3.8% | $8.5M | 87,655 | +0.6% shares | Q2 2026 |
| 4D Advisors, LLCHedge fund | 3.2% | $8.2M | 85,000 | +30.8% shares | Q2 2026 |
| Roubaix Capital, LLCHedge fund | 2.2% | $6.3M | 64,536 | +2.8% shares | Q2 2026 |
| Brant Point Investment Management LLCHedge fund | 0.9% | $4.2M | 43,000 | -17.4% shares | Q2 2026 |
| Kraematon Investment Advisors, IncWealth manager | 2.6% | $3.5M | 35,677 | -1.3% shares | Q2 2026 |
| Element Capital Management LLCHedge fund | 0.1% | $1.8M | 18,200 | New | Q2 2026 |
| Rithm Capital Corp.Asset manager | 1.0% | $800K | 8,250 | +0.0% shares | Q2 2026 |
| Highlander Partners, L.P.Hedge fund | 0.2% | $582K | 6,000 | +0.0% shares | Q2 2026 |
| TradeLink Capital LLCHedge fund | 3.1% | $316K | 3,264 | New | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 1, Q2 2026: 25). Screen CWST in the grand portfolio →
CWST stock trades by members of Congress
Members of Congress have disclosed 3 CWST trades since 2019, 0 purchases and 1 sale in the past year; the latest was Jefferson Shreve (R-IN), selling $50K–100K on May 12, 2025.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Jun 22, 2025 | Jefferson ShreveR-IN · House | Sale | $50K–100K | May 12, 2025 | -19.3% |
| Jan 16, 2020 | Susie LeeD-NV · House | Sale | $1K–15K | Dec 10, 2019 | +93.4% |
| Oct 21, 2019 | Susie LeeD-NV · House | Buy | $1K–15K | Sep 12, 2019 | +121.9% |
2 members have traded CWST: Jefferson Shreve, Susie Lee.
CWST questions and answers
Are insiders buying CWST stock?
Between Aug 1, 2026 and Oct 29, 2026, 2 CWST insiders filed 3 sales worth $1.7M on SEC Form 4, and no open-market purchases.
Which hedge funds own CWST?
26 13F filers hold CWST among their 50 largest positions, worth $1.1B combined. The biggest bets by portfolio weight are Hallstatt Advisors L.P. (12.9%), P2 Capital Partners, LLC (5.8%) and Conestoga Capital Advisors, LLC (4.9%). In their latest 13Fs, 3 managers opened a new position and 4 added to one.
Has Congress traded CWST?
Members of Congress have disclosed 3 CWST trades since 2019, 0 purchases and 1 sale in the past year; the latest was Jefferson Shreve (R-IN), selling $50K–100K on May 12, 2025.
Who is the largest holder of CWST?
Among 13F filers, Wasatch Advisors LP reports the largest CWST position, $245.6M (3,056,089 shares) in its Q3 2026 13F. The biggest bet by portfolio weight is Hallstatt Advisors L.P.'s: 12.9% of its portfolio.
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