CASELLA WASTE SYSTEMS INC-A (CWST) Institutional Shareholders
CASELLA WASTE SYSTEMS INC-A (CWST) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $6.05B in CWST holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of CWST tracked by InsiderSet, reporting ownership valued at approximately $910.56M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $839.57M, representing an estimated loss of -7.80% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% of the total disclosed CWST value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Wasatch Advisors Lp, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in CASELLA WASTE SYSTEMS INC-A (CWST).
This page ranks the largest institutional CWST shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
400
Total Reported Value
$6.05B
Largest Holder
Blackrock, Inc.
Largest Position
$910.56M
Insider Transactions (90d)
15
Latest Filing Quarter
Q2 2026
New Institutional Positions
60
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 9,390,112 | $910,559,124 | $839,569,914 | -$70,989,210 | -7.80% | |
| Wasatch Advisors Lp | 2.24% | 3,531,594 | $342,458,670 | $315,759,820 | -$26,698,850 | -7.80% | |
| Vanguard Portfolio Management Llc | 0.01% | 3,353,241 | $266,046,141 | $299,813,278 | +$33,767,137 | +12.69% | |
| State Street Corp | 0.01% | 2,520,170 | $244,364,046 | $225,328,400 | -$19,035,646 | -7.79% | |
| Conestoga Capital Advisors, Llc | 4.93% | 2,336,156 | $226,537,047 | $208,875,708 | -$17,661,339 | -7.80% | |
| Vanguard Capital Management Llc | 0.01% | 2,798,927 | $222,066,868 | $250,252,063 | +$28,185,195 | +12.69% | |
| Capital Research Global Investors | 0.03% | 2,330,165 | $184,875,291 | $208,340,053 | +$23,464,762 | +12.69% | |
| Capital International Investors | 0.04% | 1,952,820 | $154,936,739 | $174,601,636 | +$19,664,897 | +12.69% | |
| Invesco Ltd. | 0.02% | 1,653,438 | $131,183,771 | $147,833,892 | +$16,650,121 | +12.69% | |
| Geode Capital Management, Llc | 0.01% | 1,553,163 | $123,250,103 | $138,868,304 | +$15,618,201 | +12.67% | |
| Pictet Asset Management Holding Sa | 0.10% | 1,052,330 | $102,034,062 | $94,088,825 | -$7,945,237 | -7.79% | |
| William Blair Investment Management, Llc | 0.33% | 1,257,092 | $99,737,679 | $112,396,596 | +$12,658,917 | +12.69% | |
| Silvercrest Asset Management Group Llc | 0.72% | 1,252,042 | $99,337,333 | $111,945,075 | +$12,607,742 | +12.69% | |
| Wellington Management Group Llp | 0.02% | 1,211,802 | $96,144,371 | $108,347,217 | +$12,202,846 | +12.69% | |
| Morgan Stanley | 0.01% | 1,195,294 | $94,834,824 | $106,871,237 | +$12,036,413 | +12.69% | |
| Clearbridge Investments, Llc | 0.08% | 1,141,729 | $90,584,766 | $102,081,990 | +$11,497,224 | +12.69% | |
| Earnest Partners Llc | 0.37% | 1,133,077 | $89,898,329 | $101,308,415 | +$11,410,086 | +12.69% | |
| Geneva Capital Management Llc | 2.03% | 911,153 | $88,354,468 | $81,466,190 | -$6,888,278 | -7.80% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,067,132 | $84,662,540 | $95,412,272 | +$10,749,732 | +12.70% | |
| Goldman Sachs Group Inc | 0.01% | 1,050,770 | $83,368,052 | $93,949,346 | +$10,581,294 | +12.69% | |
| Neuberger Berman Group Llc | 0.06% | 953,777 | $75,672,667 | $85,277,202 | +$9,604,535 | +12.69% | |
| Ubs Group Ag | 0.01% | 932,817 | $74,009,701 | $83,403,168 | +$9,393,467 | +12.69% | |
| Nomura Asset Management International Inc. | 0.11% | 835,425 | $66,283,000 | $74,695,349 | +$8,412,349 | +12.69% | |
| Westfield Capital Management Co Lp | 0.27% | 822,492 | $65,256,515 | $73,539,010 | +$8,282,495 | +12.69% | |
| Ameriprise Financial Inc | 0.01% | 780,338 | $61,912,017 | $69,770,021 | +$7,858,004 | +12.69% | |
| Allspring Global Investments Holdings, Llc | 0.10% | 721,890 | $58,862,911 | $64,544,185 | +$5,681,274 | +9.65% | |
| Voya Investment Management Llc | 0.06% | 724,354 | $57,470,247 | $64,764,491 | +$7,294,244 | +12.69% | |
| Bamco Inc | 0.17% | 718,461 | $57,002,696 | $64,237,598 | +$7,234,902 | +12.69% | |
| Northern Trust Corp | 0.01% | 711,776 | $56,472,307 | $63,639,892 | +$7,167,585 | +12.69% | |
| Charles Schwab Investment Management Inc | 0.01% | 652,700 | $51,785,218 | $58,357,907 | +$6,572,689 | +12.69% | |
| Brown Advisory Inc | 0.08% | 649,492 | $51,530,679 | $58,071,080 | +$6,540,401 | +12.69% | |
| Timessquare Capital Management, Llc | 0.72% | 503,732 | $48,846,892 | $45,038,678 | -$3,808,214 | -7.80% | |
| Loomis Sayles & Co L P | 0.06% | 608,654 | $48,290,609 | $54,419,754 | +$6,129,145 | +12.69% | |
| Bnp Paribas Asset Management Holding S.A. | 0.05% | 593,009 | $47,049,334 | $53,020,935 | +$5,971,601 | +12.69% | |
| Bank Of New York Mellon Corp | 0.01% | 436,500 | $42,327,398 | $39,027,465 | -$3,299,933 | -7.80% | |
| London Co Of Virginia | 0.26% | 532,707 | $42,265,710 | $47,629,333 | +$5,363,623 | +12.69% | |
| Fred Alger Management, Llc | 0.18% | 526,659 | $41,785,125 | $47,088,581 | +$5,303,456 | +12.69% | |
| Sei Investments Co | 0.04% | 525,062 | $41,660,342 | $46,945,793 | +$5,285,451 | +12.69% | |
| Point72 Asset Management, L.P. | 0.06% | 463,949 | $36,809,714 | $41,481,680 | +$4,671,966 | +12.69% | |
| Boston Trust Walden Corp | 0.28% | 372,647 | $36,135,580 | $33,318,368 | -$2,817,212 | -7.80% | |
| Fifth Third Bancorp | 0.06% | 364,397 | $35,335,598 | $32,580,736 | -$2,754,862 | -7.80% | |
| Schroder Investment Management Group | 0.03% | 448,049 | $35,118,081 | $40,060,061 | +$4,941,980 | +14.07% | |
| Bank Of America Corp | 0.00% | 438,906 | $34,822,802 | $39,242,585 | +$4,419,783 | +12.69% | |
| Vanguard Fiduciary Trust Co | 0.01% | 436,116 | $34,601,443 | $38,993,132 | +$4,391,689 | +12.69% | |
| Woodline Partners Lp | 0.12% | 415,406 | $32,958,312 | $37,141,450 | +$4,183,138 | +12.69% | |
| Capital World Investors | 0.00% | 392,100 | $31,109,214 | $35,057,661 | +$3,948,447 | +12.69% | |
| Select Equity Group, L.P. | 0.17% | 391,974 | $31,099,217 | $35,046,395 | +$3,947,178 | +12.69% | |
| Principal Financial Group Inc | 0.01% | 306,218 | $29,693,959 | $27,378,951 | -$2,315,008 | -7.80% | |
| Franklin Resources Inc | 0.01% | 345,826 | $27,437,834 | $30,920,303 | +$3,482,469 | +12.69% | |
| Ranger Investment Management, L.P. | 1.96% | 341,689 | $27,109,605 | $30,550,413 | +$3,440,808 | +12.69% |
Frequently asked questions about CWST
Who owns the most CWST stock?
The largest holders of CWST are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CASELLA WASTE SYSTEMS INC-A (CWST).
Is CWST widely held by superinvestors?
Many widely followed stocks like CWST appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CWST is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.