As of November 6, 2026, Casella Waste Systems Inc is a publicly traded company (Nasdaq: CWST); its largest reported holder is BlackRock, with 14.3% on Schedule 13G/A of January 8, 2026, then Vanguard (5.45%). The largest insider holding is Douglas R. Casella, the chairman and bd of directors, with 584,241 shares, per Form 4 of August 14, 2026 (Schedule 13G/A, January 8, 2026).
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Is Casella Waste Systems Inc a real, registered company?
- Casella Waste Systems Inc files with the SEC under CIK 911177 (its SEC filings).
- Its shares are listed under the ticker CWST on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Rutland, Vermont, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Casella Waste Systems Inc in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Damian A. Ribar, Chief Operating Officer (Form 8-K filed 2026-07-01). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Wasatch (filed 2026-07-09).
Who are Casella Waste Systems Inc's owners and officers?
Casella Waste Systems Inc: incorporated in Delaware; business address in Rutland, Vermont; industry Refuse Systems (Schedule 13G/A, 2026-10-09).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-10-09 | Wasatch Advisors LP | 4.9% |
| Schedule 13G, 2026-07-09 | Wasatch Advisors LP | 5.6% |
| Schedule 13G, 2026-04-29 | Vanguard Capital Management | 5.23% |
| Schedule 13G, 2026-04-29 | Vanguard Portfolio Management | 5.45% |
| Schedule 13G/A, 2026-04-22 | Wasatch Advisors LP | 4.1% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-01-08 | Blackrock, Inc. | 14.3% |
| Schedule 13G/A, 2026-01-07 | The Vanguard Group | 10.51% |
| Schedule 13G, 2025-08-14 | Wasatch Advisors LP | 5.5% |
Questions about who owns Casella Waste Systems Inc
Who owns Casella Waste Systems Inc?
On this page, 3 holders' latest ownership filings report 5% or more of Casella Waste Systems Inc: Blackrock, Inc. (14.3%, Schedule 13G/A, filed 2026-01-08), Vanguard Portfolio Management (5.45%, Schedule 13G, filed 2026-04-29) and Vanguard Capital Management (5.23%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of Casella Waste Systems Inc?
By the share each holder's latest filing reports, the largest holders of Casella Waste Systems Inc on this page are Blackrock, Inc. (14.3%), Vanguard Portfolio Management (5.45%) and Vanguard Capital Management (5.23%).
When did Blackrock, Inc. buy into Casella Waste Systems Inc?
The filings give report dates, not purchase dates. The earliest filing from Blackrock, Inc. on this page is the Schedule 13G/A, filed 2026-01-08, reporting 14.3%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 9 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Casella Waste Systems Inc covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-07-01 | Damian A. Ribar | Chief Operating Officer | appointed |
Which insiders own Casella Waste Systems Inc shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chairman and bd of directors: 584,241 shares, 219,141 held directly and 365,100 indirectly (Form 4, 2026-08-14).
- , a director: 525,589 shares, 160,595 held directly and 364,994 indirectly (Form 4, 2026-06-02).
- , the chief executive and president: 140,118 shares (Form 4, 2026-05-22).
- , the general counsel and senior vice president: 28,369 shares (Form 4, 2026-03-16).
- , the senior vice president of sustainable growth: 18,374 shares, 18,347 held directly and 27 indirectly (Form 4, 2025-08-05).
Shares only: the company's cover page does not give one share count for a single class, so no percentage is worked out.
How much has Casella Waste Systems Inc raised?
No fundraising or offering filing from Casella Waste Systems Inc is on file with us.
Keep reading
More on Casella Waste Systems Inc and the records around it.
Casella Waste Systems Inc elsewhere on the record
- Leadership changes Jul 2026
Companies that share a holder
- Wasatch Advisors LP also filed stake reports on 72 other companies: Smith Douglas Homes Corp (Oct 2026), Amtech Systems Inc (Oct 2026), BBB Foods Inc (Oct 2026)
- Vanguard Portfolio Management also filed stake reports on 941 other companies: Newmark Group Inc (Nov 2026), A10 Networks Inc (Oct 2026), ADT Inc (Oct 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
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