CWST · Casella Waste Systems Inc · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding CWST
All superinvestors →Holder Concentration
Across 419 13F filersWho Holds CWST
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 418 filers, like-for-like change +2.9%; actively managed books +3.2%; index-like books +2.2%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 42.4% | 220 | +2.4% |
| Exempt adviser | 0.0% | 1 | -92.4% |
| Adviser | 15.3% | 14 | -11.8% |
| Bank | 9.9% | 23 | +10.3% |
| Insurer | 0.5% | 3 | +1.7% |
| Broker-dealer | 0.0% | 1 | +12.6% |
| Benefit plan | 0.3% | 5 | -4.8% |
| Non-US | 2.6% | 10 | +44.9% |
| Holding company | 19.6% | 12 | +4.4% |
| Unknown | 9.4% | 129 | +20.6% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 29.0% | 43 | +2.2% |
| Systematic-like | 1.5% | 15 | -12.4% |
| Concentrated | 2.2% | 62 | +42.1% |
| Diversified active | 67.3% | 298 | +2.7% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 62.8% | 259 | +3.2% |
| Medium turnover | 23.8% | 89 | +4.9% |
| High turnover | 2.1% | 32 | -14.5% |
| Unknown | 11.2% | 38 | +1.4% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 10.5% | 44 | -1.2% |
| Medium horizon | 17.5% | 63 | +7.2% |
| Long horizon | 67.3% | 285 | +2.6% |
| Unknown | 4.7% | 26 | +3.1% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 1.3% | 106 | -0.9% |
| $1B to $10B | 10.5% | 113 | -9.6% |
| $10B to $100B | 23.8% | 122 | -0.4% |
| $100B or more | 64.4% | 77 | +6.8% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 5.5% | 122 | +1.0% |
| Pooled investment vehicles | 3.2% | 25 | +8.9% |
| Registered funds and BDCs | 15.8% | 23 | +3.5% |
| Pension and profit sharing plans | 0.4% | 4 | +4.6% |
| Insurance companies | 1.0% | 3 | +2.5% |
| Charitable organizations | 0.0% | 1 | -10.0% |
| Governments and sovereign funds | 0.5% | 5 | +4.8% |
| Corporations | 0.4% | 1 | -3.3% |
| Other investment advisers | 0.1% | 6 | -23.7% |
| Other | 0.2% | 4 | -27.6% |
| Diversified | 15.3% | 26 | +1.2% |
| Unknown | 57.6% | 198 | +3.3% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 9.5% | 44 | -0.9% |
| Private equity funds | 0.6% | 11 | -38.3% |
| Venture capital funds | 0.0% | 2 | +78.3% |
| Real estate funds | 0.0% | 3 | +103.8% |
| Securitized asset funds | 0.4% | 1 | +12.2% |
| Other private funds | 11.5% | 20 | +4.4% |
| Mixed private funds | 0.1% | 1 | +3.8% |
| Private funds, type not stated | 1.0% | 3 | -3.1% |
| No private funds | 19.3% | 136 | +4.6% |
| Liquidity funds | 0.0% | 0 | — |
| Unknown | 57.6% | 197 | +3.5% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 92.0% | 362 | +2.6% |
| Outside the US | 8.0% | 56 | +8.1% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 6 holders with no observed 2026-03-31 13F and 2 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
418 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 35.0% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies CWST's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | AGYS Agilysys Inc | 12 |
| 2 | NOVT Novanta Inc | 14 |
| 3 | LMAT Lemaitre Vascular Inc | 10 |
| 4 | CHEF Chefs' Warehouse, Inc. | 7 |
| 5 | VCEL Vericel Corp | 9 |
| 6 | LOAR Loar Holdings Inc. | 9 |
| 7 | ROAD Construction Partners, Inc. | 10 |
| 8 | DSGX Descartes Systems Group Inc | 11 |
| 9 | BOOT Boot Barn Holdings, Inc. | 12 |
| 10 | SPXC SPX Technologies, Inc. | 11 |
Shareholder Targets
13F filers that own its peers but not CWST, quarter ended Jun 30, 2026Found through its holder-overlap peers: AGYS, NOVT, LMAT, CHEF, VCEL, LOAR, ROAD, DSGX, BOOT, SPXC, HQY, SITE, BLFS, AIN, RBC, RGEN, ESE, COCO, MRCY, GRDN. 1,208 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | ABRAMS CAPITAL MANAGEMENT, L.P. Registered adviser, Concentrated | $2,583,569,846 1 held | LOAR |
| 2 | KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC Registered adviser, Diversified active | $1,264,974,383 7 held | RBC, SITE, ROAD |
| 3 | Durable Capital Partners LP Adviser, Diversified active | $1,100,647,659 1 held | RBC |
| 4 | Capital World Investors Adviser, Diversified active | $1,037,186,250 5 held | SPXC, ESE, ROAD |
| 5 | Artisan Partners Limited Partnership Registered adviser, Diversified active | $810,846,334 10 held | RBC, SPXC, AGYS |
| 6 | CONGRESS ASSET MANAGEMENT CO Registered adviser, Diversified active | $729,177,863 6 held | NOVT, RGEN, BOOT |
| 7 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser, Diversified active | $679,136,321 7 held | RBC, RGEN, CHEF |
| 8 | Stephens Investment Management Group LLC Registered adviser, Diversified active | $556,711,238 8 held | RBC, RGEN, BOOT |
| 9 | BAILLIE GIFFORD & CO Adviser, Diversified active | $489,787,018 1 held | RBC |
| 10 | JANA Partners Management, LP Registered adviser, Concentrated | $484,285,998 1 held | MRCY |
Fund Ownership of CWST by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 27.07% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 4.77% | 3,036,087 |
| Index ETFs | 22.30% | 14,193,898 |
| Active ETFs | 1.15% | 732,297 |
| Active funds | 32.79% | 20,869,099 |
| Unclassified | 0.42% | 264,319 |
| All registered funds | 61.43% | 39,095,700 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $910,559,152 | 12.32% | 9,390,112 | Shares | 2026-08-07 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $334,425,093 | 4.52% | 3,448,748 | Shares | 2026-08-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $273,749,510 | 3.70% | 2,823,033 | Shares | 2026-08-13 | |
| Large WASATCH ADVISORS LP Registered adviser | $245,556,751 | 3.32% | 3,056,089 | Shares | 2026-10-13 | |
| Mega STATE STREET CORP Bank | $244,380,884 | 3.31% | 2,520,170 | Shares | 2026-09-22 | |
| Mid Conestoga Capital Advisors, LLC Adviser | $226,537,047 | 3.06% | 2,336,156 | Shares | 2026-07-24 | |
| Mega T. Rowe Price Investment Management, Inc. Adviser | $201,505,793 | 2.73% | 2,078,022 | Shares | 2026-08-14 | |
| Mega Capital International Investors Adviser | $199,215,071 | 2.69% | 2,054,399 | Shares | 2026-08-12 | |
| Mega Capital Research Global Investors Adviser | $196,717,802 | 2.66% | 2,028,646 | Shares | 2026-08-12 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $159,723,844 | 2.16% | 1,647,147 | Shares | 2026-08-12 | |
| Mega JPMORGAN CHASE & CO Bank | $149,732,925 | 2.03% | 1,544,116 | Shares | 2026-08-12 | |
| Mega Invesco Ltd. Adviser | $141,480,101 | 1.91% | 1,459,009 | Shares | 2026-08-14 | |
| Mega NEUBERGER BERMAN GROUP LLC Holding company | $139,099,876 | 1.88% | 1,434,463 | Shares | 2026-08-13 | |
| Large EARNEST PARTNERS LLC Registered adviser | $135,728,715 | 1.84% | 1,399,698 | Shares | 2026-08-13 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $125,295,031 | 1.69% | 1,292,101 | Shares | 2026-08-14 | |
| Mega Clearbridge Investments, LLC Registered adviser | $118,287,399 | 1.60% | 1,219,835 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY Holding company | $117,670,085 | 1.59% | 1,213,469 | Shares | 2026-08-13 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $114,831,484 | 1.55% | 1,184,196 | Shares | 2026-08-11 | |
| Large SILVERCREST ASSET MANAGEMENT GROUP LLC Registered adviser | $114,612,818 | 1.55% | 1,181,941 | Shares | 2026-08-14 | |
| Mega Pictet Asset Management Holding SA | $102,044,440 | 1.38% | 1,052,330 | Shares | 2026-07-30 | |
| Large BAMCO INC /NY/ Registered adviser | $93,599,225 | 1.27% | 965,239 | Shares | 2026-08-14 | |
| Mid GENEVA CAPITAL MANAGEMENT LLC Registered adviser | $88,354,505 | 1.20% | 911,153 | Shares | 2026-08-06 | |
| Mega AMERICAN CENTURY COMPANIES INC | $83,631,970 | 1.13% | 862,452 | Shares | 2026-08-12 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $80,191,375 | 1.08% | 826,971 | Shares | 2026-08-14 | |
| Large WESTFIELD CAPITAL MANAGEMENT CO LP Registered adviser | $78,790,549 | 1.07% | 812,525 | Shares | 2026-08-12 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $78,377,067 | 1.06% | 808,261 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $77,918,981 | 1.05% | 803,537 | Shares | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $74,787,623 | 1.01% | 771,245 | Shares | 2026-08-13 | |
| Mega VOYA INVESTMENT MANAGEMENT LLC Registered adviser | $71,724,053 | 0.97% | 739,652 | Shares | 2026-08-12 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $69,765,066 | 0.94% | 719,450 | Shares | 2026-08-14 | |
| Mega SCHRODER INVESTMENT MANAGEMENT GROUP Registered adviser | $65,693,393 | 0.89% | 677,461 | Shares | 2026-08-13 | |
| Large BROWN ADVISORY INC | $64,993,075 | 0.88% | 670,239 | Shares | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $61,536,287 | 0.83% | 634,591 | Shares | 2026-08-14 | |
| Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Adviser | $60,558,346 | 0.82% | 624,506 | Shares | 2026-08-14 | |
| Large Allspring Global Investments Holdings, LLC Holding company | $60,321,545 | 0.82% | 622,064 | Shares | 2026-08-13 | |
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. Non-US | $58,684,013 | 0.79% | 605,177 | Shares | 2026-08-13 | |
| Large LOOMIS SAYLES & CO L P Registered adviser | $55,648,464 | 0.75% | 573,873 | Shares | 2026-08-14 | |
| Large Select Equity Group, L.P. Registered adviser | $54,597,116 | 0.74% | 563,031 | Shares | 2026-08-14 | |
| Mega SEI INVESTMENTS CO | $54,024,798 | 0.73% | 557,129 | Shares | 2026-08-14 | |
| Mega FRANKLIN RESOURCES INC Adviser | $50,279,233 | 0.68% | 518,503 | Shares | 2026-08-13 | |
| Mid TimesSquare Capital Management, LLC Registered adviser | $48,846,892 | 0.66% | 503,732 | Shares | 2026-08-07 | |
| Large LONDON CO OF VIRGINIA Registered adviser | $48,789,873 | 0.66% | 503,144 | Shares | 2026-08-14 | |
| Mega NORGES BANK Non-US | $46,189,041 | 0.62% | 476,323 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $44,178,077 | 0.60% | 455,585 | Shares | 2026-09-02 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $43,632,621 | 0.59% | 449,960 | Shares | 2026-08-13 | |
| Mid DF DENT & CO INC Registered adviser | $43,274,801 | 0.59% | 446,270 | Shares | 2026-08-14 | |
| Large Point72 Asset Management, L.P. Registered adviser | $43,204,110 | 0.58% | 445,541 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $42,327,400 | 0.57% | 436,500 | Shares | 2026-08-06 | |
| Mid Granahan Investment Management, LLC Registered adviser | $42,306,944 | 0.57% | 436,289 | Shares | 2026-08-14 | |
| Mid SEGALL BRYANT & HAMILL, LLC Registered adviser | $41,970,846 | 0.57% | 432,823 | Shares | 2026-08-12 | |
| Large FRED ALGER MANAGEMENT, LLC Registered adviser | $38,263,973 | 0.52% | 394,596 | Shares | 2026-08-14 | |
| Large Boston Trust Walden Corp | $36,135,578 | 0.49% | 372,647 | Shares | 2026-07-24 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $35,628,813 | 0.48% | 367,421 | Shares | 2026-08-14 | |
| Large FIFTH THIRD BANCORP Bank | $35,335,577 | 0.48% | 364,397 | Shares | 2026-08-05 | |
| Large CREDIT AGRICOLE S A | $33,605,729 | 0.45% | 346,558 | Shares | 2026-08-14 | |
| Mid Ranger Investment Management, L.P. Registered adviser | $32,044,706 | 0.43% | 330,460 | Shares | 2026-08-13 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $31,843,684 | 0.43% | 328,387 | Shares | 2026-08-13 | |
| Mid Harvey Partners, LLC Registered adviser | $30,073,403 | 0.41% | 310,131 | Shares | 2026-08-14 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $29,693,959 | 0.40% | 306,218 | Shares | 2026-08-04 | |
| Mega RAYMOND JAMES FINANCIAL INC | $29,480,236 | 0.40% | 304,014 | Shares | 2026-08-14 | |
| Large Aberdeen Group plc Holding company | $26,753,925 | 0.36% | 275,899 | Shares | 2026-07-31 | |
| Mid KENNEDY CAPITAL MANAGEMENT LLC Registered adviser | $26,463,888 | 0.36% | 272,908 | Shares | 2026-08-14 | |
| Large WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Registered adviser | $26,020,929 | 0.35% | 268,340 | Shares | 2026-08-12 | |
| Mega ENVESTNET ASSET MANAGEMENT INC Registered adviser | $25,939,378 | 0.35% | 267,499 | Shares | 2026-09-23 | |
| Large Rockefeller Capital Management L.P. Registered adviser | $25,868,492 | 0.35% | 266,768 | Shares | 2026-08-13 | |
| Large AustralianSuper Pty Ltd Non-US | $25,583,110 | 0.35% | 263,825 | Shares | 2026-08-12 | |
| Large PICTON MAHONEY ASSET MANAGEMENT Non-US | $24,582,961 | 0.33% | 253,511 | Shares | 2026-08-13 | |
| Large Tidal Investments LLC Registered adviser | $22,565,888 | 0.31% | 232,710 | Shares | 2026-08-13 | |
| Large GW&K Investment Management, LLC Registered adviser | $22,093,741 | 0.30% | 227,841 | Shares | 2026-08-12 | |
| Large Public Sector Pension Investment Board Non-US | $20,861,737 | 0.28% | 215,136 | Shares | 2026-08-13 | |
| Small HALLSTATT ADVISORS L.P. | $18,378,433 | 0.25% | 189,527 | Shares | 2026-08-04 | |
| Mid Aristotle Capital Boston, LLC Registered adviser | $17,759,376 | 0.24% | 183,143 | Shares | 2026-08-14 | |
| Mid SG Capital Management LLC Registered adviser | $17,022,404 | 0.23% | 175,543 | Shares | 2026-08-07 | |
| Large BLAIR WILLIAM & CO/IL Registered adviser | $16,676,997 | 0.23% | 171,981 | Shares | 2026-08-11 | |
| Mid Granite Investment Partners, LLC Registered adviser | $15,829,867 | 0.21% | 163,245 | Shares | 2026-08-07 | |
| Mid Fenimore Asset Management Inc | $15,412,415 | 0.21% | 191,816 | Shares | 2026-10-08 | |
| Large AXIOM INVESTORS LLC /DE Registered adviser | $15,145,453 | 0.20% | 156,187 | Shares | 2026-08-12 | |
| Mega Nuveen, LLC | $14,852,990 | 0.20% | 153,171 | Shares | 2026-08-11 | |
| Small P2 Capital Partners, LLC Registered adviser | $14,277,474 | 0.19% | 147,236 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $14,164,213 | 0.19% | 146,068 | Shares | 2026-08-12 | |
| Mega Legal & General Group Plc | $14,017,691 | 0.19% | 144,557 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $13,426,853 | 0.18% | 138,464 | Shares | 2026-08-14 | |
| Mega Russell Investments Group, Ltd. | $13,046,921 | 0.18% | 134,546 | Shares | 2026-08-06 | |
| Mega Swiss National Bank | $12,169,735 | 0.16% | 125,500 | Shares | 2026-08-11 | |
| Mid OSTERWEIS CAPITAL MANAGEMENT INC Registered adviser | $11,932,643 | 0.16% | 123,055 | Shares | 2026-08-14 | |
| Mid BOOTHBAY FUND MANAGEMENT, LLC Registered adviser | $11,283,817 | 0.15% | 116,364 | Shares | 2026-08-14 | |
| Large Ensign Peak Advisors, Inc | $11,271,114 | 0.15% | 116,233 | Shares | 2026-08-14 | |
| Mid OPPENHEIMER ASSET MANAGEMENT INC. | $10,228,974 | 0.14% | 105,486 | Shares | 2026-08-03 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $10,154,213 | 0.14% | 104,715 | Shares | 2026-08-14 | |
| Mid RIVERBRIDGE PARTNERS LLC Registered adviser | $9,985,873 | 0.14% | 102,979 | Shares | 2026-07-13 | |
| Mega DEUTSCHE BANK AG\ Non-US | $9,982,673 | 0.14% | 102,946 | Shares | 2026-08-07 | |
| Mid CASTLEARK MANAGEMENT LLC Registered adviser | $9,741,606 | 0.13% | 100,460 | Shares | 2026-08-14 | |
| Large KING LUTHER CAPITAL MANAGEMENT CORP Registered adviser | $9,629,024 | 0.13% | 99,299 | Shares | 2026-08-10 | |
| Large GAMCO INVESTORS, INC. ET AL Registered adviser | $9,619,424 | 0.13% | 99,200 | Shares | 2026-08-12 | |
| Small Summit Creek Advisors LLC Registered adviser | $9,564,442 | 0.13% | 98,633 | Shares | 2026-08-07 | |
| Mega JENNISON ASSOCIATES LLC Registered adviser | $9,365,071 | 0.13% | 96,577 | Shares | 2026-08-03 | |
| Large NATIXIS ADVISORS, LLC Registered adviser | $9,144,367 | 0.12% | 94,301 | Shares | 2026-08-14 | |
| Mega ROYAL BANK OF CANADA Bank | $9,126,329 | 0.12% | 94,115 | Shares | 2026-08-14 | |
| Mega JONES FINANCIAL COMPANIES LLLP | $8,630,330 | 0.12% | 89,000 | Shares | 2026-08-14 | |
| Small Catawba River Capital Registered adviser | $8,499,905 | 0.11% | 87,655 | Shares | 2026-07-22 |
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