CWST Casella Waste Systems Inc.
Casella Waste Systems Inc. (CWST) Institutional Ownership
What the institutions did with CWST last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 9.4M | 12.1% |
| WASATCH ADVISORS LP | 3.5M | 4.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.4M | 4.5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.8M | 3.7% |
| STATE STREET CORP | 2.5M | 3.3% |
| Conestoga Capital Advisors, LLC | 2.3M | 3.0% |
| T. Rowe Price Investment Management, Inc. | 2.1M | 2.7% |
| Capital International Investors | 2.1M | 2.7% |
| Capital Research Global Investors | 2.0M | 2.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.6M | 2.1% |
| JPMORGAN CHASE & CO | 1.5M | 2.0% |
| Invesco Ltd. | 1.5M | 1.9% |
| NEUBERGER BERMAN GROUP LLC | 1.4M | 1.9% |
| EARNEST PARTNERS LLC | 1.4M | 1.8% |
| WELLINGTON MANAGEMENT GROUP LLP | 1.3M | 1.7% |
| Clearbridge Investments, LLC | 1.2M | 1.6% |
| MORGAN STANLEY | 1.2M | 1.6% |
| DIMENSIONAL FUND ADVISORS LP | 1.2M | 1.5% |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 1.2M | 1.5% |
| Pictet Asset Management Holding SA | 1.1M | 1.4% |
| BAMCO INC /NY/ | 965.2K | 1.2% |
| GENEVA CAPITAL MANAGEMENT LLC | 911.2K | 1.2% |
| AMERICAN CENTURY COMPANIES INC | 862.5K | 1.1% |
| GOLDMAN SACHS GROUP INC | 827.0K | 1.1% |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 812.5K | 1.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Reduced | 1.3M | 268.3K | -988.8K |
| WASATCH ADVISORS LP | Increased | 2.6M | 3.5M | +949.4K |
| AMERICAN CENTURY COMPANIES INC | Increased | 56.6K | 862.5K | +805.9K |
| NEUBERGER BERMAN GROUP LLC | Increased | 953.8K | 1.4M | +480.7K |
| Conestoga Capital Advisors, LLC | Reduced | 2.8M | 2.3M | -468.3K |
| CITADEL ADVISORS LLC | Increased | 34.7K | 455.6K | +420.8K |
| Woodline Partners LP | Sold Out | 415.4K | 0 | -415.4K |
| Capital World Investors | Sold Out | 392.1K | 0 | -392.1K |
| T. Rowe Price Investment Management, Inc. | Increased | 1.7M | 2.1M | +378.5K |
| BANK OF AMERICA CORP /DE/ | Increased | 438.9K | 808.3K | +369.4K |
| BlackRock, Inc. | Increased | 9.0M | 9.4M | +342.8K |
| Global Alpha Capital Management Ltd. | Sold Out | 325.8K | 0 | -325.8K |
| Capital Research Global Investors | Reduced | 2.3M | 2.0M | -301.5K |
| EARNEST PARTNERS LLC | Increased | 1.1M | 1.4M | +266.6K |
| AustralianSuper Pty Ltd | New | 0 | 263.8K | +263.8K |
| Zimmer Partners, LP | Sold Out | 257.7K | 0 | -257.7K |
| GENEVA CAPITAL MANAGEMENT LLC | Reduced | 1.2M | 911.2K | -251.9K |
| BAMCO INC /NY/ | Increased | 718.5K | 965.2K | +246.8K |
| SCHRODER INVESTMENT MANAGEMENT GROUP | Increased | 448.0K | 677.5K | +229.4K |
| GOLDMAN SACHS GROUP INC | Reduced | 1.1M | 827.0K | -223.8K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Reduced | 835.4K | 624.5K | -210.9K |
| THORNBURG INVESTMENT MANAGEMENT INC | Sold Out | 203.2K | 0 | -203.2K |
| Invesco Ltd. | Reduced | 1.7M | 1.5M | -194.4K |
| Granahan Investment Management, LLC | Increased | 250.3K | 436.3K | +186.0K |
| JPMORGAN CHASE & CO | Increased | 1.4M | 1.5M | +185.2K |
| FRANKLIN RESOURCES INC | Increased | 345.8K | 518.5K | +172.7K |
| Select Equity Group, L.P. | Increased | 392.0K | 563.0K | +171.1K |
| CREDIT AGRICOLE S A | Increased | 186.3K | 346.6K | +160.2K |
| PICTON MAHONEY ASSET MANAGEMENT | Increased | 102.1K | 253.5K | +151.4K |
| P2 Capital Partners, LLC | New | 0 | 147.2K | +147.2K |
| SG Capital Management LLC | Increased | 28.4K | 175.5K | +147.1K |
| AMERIPRISE FINANCIAL INC | Reduced | 780.3K | 634.6K | -145.7K |
| FRED ALGER MANAGEMENT, LLC | Reduced | 526.7K | 394.6K | -132.1K |
| STATE STREET CORP | Increased | 2.4M | 2.5M | +131.0K |
| UBS Group AG | Reduced | 932.8K | 803.5K | -129.3K |
| Pictet Asset Management Holding SA | Increased | 924.4K | 1.1M | +128.0K |
| DF DENT & CO INC | Increased | 327.6K | 446.3K | +118.7K |
| BLAIR WILLIAM & CO/IL | Reduced | 290.5K | 172.0K | -118.5K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 1.1M | 1.2M | +117.1K |
| Capital International Investors | Increased | 2.0M | 2.1M | +101.6K |
| CASTLEARK MANAGEMENT LLC | New | 0 | 100.5K | +100.5K |
| Allspring Global Investments Holdings, LLC | Reduced | 721.9K | 622.1K | -99.8K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 3.4M | 3.4M | +95.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.6M | 1.6M | +94.0K |
| Summit Creek Advisors LLC | Reduced | 186.8K | 98.6K | -88.1K |
| Silvant Capital Management LLC | New | 0 | 86.6K | +86.6K |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 1.2M | 1.3M | +80.3K |
| Clearbridge Investments, LLC | Increased | 1.1M | 1.2M | +78.1K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 292.2K | 367.4K | +75.3K |
| ARGENT CAPITAL MANAGEMENT LLC | Sold Out | 73.1K | 0 | -73.1K |
| TimesSquare Capital Management, LLC | Reduced | 574.2K | 503.7K | -70.5K |
| RIVERBRIDGE PARTNERS LLC | Reduced | 173.2K | 103.0K | -70.2K |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | Reduced | 1.3M | 1.2M | -70.1K |
| Thrivent Financial for Lutherans | Reduced | 120.4K | 51.8K | -68.6K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 652.7K | 719.5K | +66.8K |
| CONGRESS ASSET MANAGEMENT CO | Sold Out | 64.9K | 0 | -64.9K |
| AXIOM INVESTORS LLC /DE | Increased | 92.0K | 156.2K | +64.2K |
| KENNEDY CAPITAL MANAGEMENT LLC | Increased | 211.0K | 272.9K | +61.9K |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 80.9K | 19.7K | -61.2K |
| NORTHERN TRUST CORP | Increased | 711.8K | 771.2K | +59.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.