Casella Waste Systems, Inc. (CWST) Ownership
CWST ownership summary
as of October 18, 2026- Institutions
- 125.8% of shares outstanding
- Insiders
- 0.56% of shares outstanding
- Shares outstanding
- 62.7M
- Float
- 62.3M shares available to trade
- Short interest
- 10.83% 5.1M shares short
- Days to cover
- 9.69 short interest down 0.1% vs prior month
- Institutions 125.79%
- Insiders 0.56%
CWST top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 14.76% | 9.4M | $826.3M | +342,840 (+3.8%) | June 30, 2026 |
| 2 | Wasatch Advisors LP | 5.55% | 3.5M | $310.8M | +949,374 (+36.8%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 5.42% | 3.4M | $303.5M | +95,507 (+2.8%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 4.44% | 2.8M | $248.4M | +24,106 (+0.9%) | June 30, 2026 |
| 5 | State Street Corp | 3.96% | 2.5M | $221.8M | +130,973 (+5.5%) | June 30, 2026 |
| 6 | Conestoga Capital Advisors, LLC | 3.67% | 2.3M | $205.6M | −468,319 (−16.7%) | June 30, 2026 |
| 7 | T. Rowe Price Investment Management,Inc. | 3.27% | 2.1M | $182.9M | +378,532 (+22.3%) | June 30, 2026 |
| 8 | Capital Research & Mgmt Co - Division 3 | 3.23% | 2.1M | $180.8M | +101,579 (+5.2%) | June 30, 2026 |
| 9 | Capital Research Global Investors | 3.19% | 2.0M | $178.5M | −301,519 (−12.9%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 2.59% | 1.6M | $144.9M | +93,984 (+6.1%) | June 30, 2026 |
| 11 | JPMorgan Chase & Co | 2.43% | 1.5M | $135.9M | +185,242 (+13.6%) | June 30, 2026 |
| 12 | Amvescap Plc. | 2.29% | 1.5M | $128.4M | −194,429 (−11.8%) | June 30, 2026 |
| 13 | Neuberger Berman Group LLC | 2.25% | 1.4M | $126.2M | +480,686 (+50.4%) | June 30, 2026 |
| 14 | Earnest Partners LLC | 2.20% | 1.4M | $123.2M | +266,621 (+23.5%) | June 30, 2026 |
| 15 | Wellington Management Company LLP | 2.03% | 1.3M | $113.7M | +80,299 (+6.6%) | June 30, 2026 |
| 16 | ClearBridge Advisors, LLC | 1.92% | 1.2M | $107.3M | +78,106 (+6.8%) | June 30, 2026 |
| 17 | Morgan Stanley - Brokerage Accounts | 1.91% | 1.2M | $106.8M | +18,175 (+1.5%) | June 30, 2026 |
| 18 | Dimensional Fund Advisors, Inc. | 1.86% | 1.2M | $104.2M | +117,064 (+11.0%) | June 30, 2026 |
| 19 | Silvercrest Asset Management Group LLC | 1.86% | 1.2M | $104.0M | −70,101 (−5.6%) | June 30, 2026 |
| 20 | Pictet Asset Manangement SA | 1.65% | 1.1M | $92.6M | +127,955 (+13.8%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 16 holders added 3.5M shares and 4 cut 1.0M.
CWST top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.86% | 3.7M | $328.4M | +810 (+0.0%) | September 30, 2026 |
| 2 | American Funds SMALLCAP World A | 4.15% | 2.6M | $232.3M | −396,531 (−13.1%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 3.13% | 2.0M | $175.4M | −2,658 (−0.1%) | August 31, 2026 |
| 4 | iShares Russell 2000 ETF | 2.60% | 1.7M | $145.5M | −14,531 (−0.9%) | September 30, 2026 |
| 5 | Wasatch Core Growth | 2.34% | 1.5M | $131.3M | +534,707 (+55.9%) | June 30, 2026 |
| 6 | Vanguard Small Cap Index | 2.22% | 1.4M | $124.2M | −30,332 (−2.1%) | September 30, 2026 |
| 7 | American Funds IS® Growth 1 | 1.51% | 963K | $84.7M | — | September 30, 2026 |
| 8 | Pictet-Water I EUR | 1.34% | 853K | $75.1M | +110,297 (+14.8%) | June 30, 2026 |
| 9 | Vanguard MStar Small Cap Growth Indx Inv | 1.23% | 785K | $69.1M | −41,942 (−5.1%) | September 30, 2026 |
| 10 | Neuberger Genesis Inv | 1.21% | 768K | $67.6M | −45,696 (−5.6%) | September 30, 2026 |
| 11 | Conestoga Small Cap Investors | 1.19% | 757K | $66.7M | −76,900 (−9.2%) | August 31, 2026 |
| 12 | Fidelity Small Cap Index | 1.10% | 698K | $61.5M | +5,977 (+0.9%) | July 31, 2026 |
| 13 | Voya Small Cap Growth I | 1.03% | 658K | $57.9M | +12,815 (+2.0%) | September 30, 2026 |
| 14 | iShares Russell 2000 Growth ETF | 0.94% | 599K | $52.7M | −758 (−0.1%) | September 30, 2026 |
| 15 | iShares S&P Small-Cap 600 Growth ETF | 0.91% | 580K | $51.0M | — | September 30, 2026 |
| 16 | State Street SPDR Port S&P 600 Sm CpETF | 0.90% | 570K | $50.2M | — | September 30, 2026 |
| 17 | T. Rowe Price Small-Cap Value | 0.87% | 554K | $48.8M | — | September 30, 2026 |
| 18 | T. Rowe Price Small-Cap Stock | 0.84% | 537K | $47.3M | +26,580 (+5.2%) | September 30, 2026 |
| 19 | BNP Paribas US Small Cap ClassicC | 0.81% | 518K | $45.6M | −992 (−0.2%) | August 31, 2026 |
| 20 | Harbor Small Cap Value Instl | 0.80% | 512K | $45.1M | −9,906 (−1.9%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
CWST insider transactions
latest 13| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-16 | Bradford John Helgeson | Sell | $87.73 | 405 | $35,531 |
| 2026-03-16 | Edmond Coletta | Sell | $87.81 | 988 | $86,756 |
| 2026-03-16 | John W Casella | Sell | $87.77 | 1,744 | $153,071 |
| 2026-03-16 | Kevin Drohan | Sell | $87.73 | 85 | $7,457 |
| 2026-03-12 | Edmond Coletta | Sell | $89.80 | 377 | $33,855 |
| 2026-03-12 | John W Casella | Sell | $90.06 | 963 | $86,728 |
| 2026-03-12 | Kevin Drohan | Sell | $89.52 | 55 | $4,924 |
| 2026-02-27 | Edmond Coletta | Sell | $93.70 | 3,812 | $357,184 |
| 2026-02-27 | John W Casella | Sell | $93.10 | 6,726 | $626,191 |
| 2026-02-27 | Kevin Drohan | Sell | $92.61 | 675 | $62,512 |
| 2025-11-07 | Bradford John Helgeson | Sell | $87.65 | 262 | $22,964 |
| 2025-05-12 | Jefferson Shreve | Sell | $113.24 | — | — |
| 2025-05-06 | Edmond Coletta | Sell | $119.18 | 5,562 | $662,879 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
CWST shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CWST
Institutional investors own 125.8% of Casella Waste Systems's shares and insiders 0.56%. The largest holder is BlackRock Inc with 14.76% of the shares (9.4M), as of June 30, 2026. Among the top 20 institutions, 16 added shares and 4 reduced their stake in the latest filings. Short interest is 10.83% of the float, or 9.69 days of average trading volume. The share count rose 57.7% since 2014.
Related: CWST analyst forecast, CWST key metrics. See the CWST stock overview for the latest quote and news.
CWST ownership FAQ
Who owns the most Casella Waste Systems stock?
The largest shareholders of Casella Waste Systems are BlackRock Inc (14.76%), Wasatch Advisors LP (5.55%), Vanguard Portfolio Management, LLC (5.42%), Vanguard Capital Management, LLC (4.44%), State Street Corp (3.96%).
What percentage of Casella Waste Systems is owned by institutions?
Institutions hold 125.8% of Casella Waste Systems's shares outstanding; insiders hold 0.56%.
Which funds own Casella Waste Systems?
The largest fund holders of Casella Waste Systems are iShares Core S&P Small-Cap ETF (5.86%), American Funds SMALLCAP World A (4.15%), Vanguard MStar Total Stk Mkt Idx Invest (3.13%), iShares Russell 2000 ETF (2.60%), Wasatch Core Growth (2.34%).
What is Casella Waste Systems's short interest?
5.1M shares of Casella Waste Systems were sold short, 10.83% of the float; at the average daily volume it would take 9.69 days to cover.
Are insiders buying or selling Casella Waste Systems?
Of the latest 13 reported insider transactions in Casella Waste Systems (since May 6, 2025), 0 were purchases and 13 were sales.
How many shares of Casella Waste Systems are outstanding?
Casella Waste Systems has 62.7M shares outstanding, of which 62.3M are in the public float.