Clean Harbors Inc
CLH- Exchange
- NYSE
- Industry
- Hazardous Waste Management
- SEC CIK
- 0000822818
In the last 90 days, Clean Harbors Inc insiders filed 0 open-market purchases and 5 sales; 663 institutions reported holding it in 13F filings for Q2 2026, worth $14.8B in total; D1 Capital Partners is the only superinvestor holding it.
Holders of 5% or more of CLH
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Clean Harbors Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Wellington Management Group LLP | 13G/A | 9.70%5.18M shares | −1.20 ppfrom 10.90% | May 7, 20253 filings | Feb 10, 2026 | SEC |
| D1 Capital Partners L.P.SuperinvestorD1 Capital Partners | 13G | 5.20%2.78M shares | New | Feb 17, 20261 filing | Feb 17, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
5 Schedule 13D and 13G filings on Clean Harbors Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 26, 20265:17 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 17, 202612:08 PM ET | D1 Capital Partners L.P.and 1 otherSuperinvestorD1 Capital Partners | 13G | 5.20%2.78M shares | New | Dec 31, 2025 | SEC |
| Feb 10, 202611:19 AM ET | Wellington Management Group LLPand 3 others | 13G/A | 9.70%5.18M shares | −1.20 ppfrom 10.90% | Dec 31, 2025 | SEC |
| May 7, 202510:02 AM ET | Wellington Management Group LLPand 3 others | 13G/A | 10.90%5.81M shares | +1.10 ppfrom 9.80% | Apr 30, 2025 | SEC |
| May 7, 20259:59 AM ET | Wellington Management Group LLPand 3 others | 13G/A | 9.80%5.29M shares | – | Mar 31, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Clean Harbors Inc shares.
No Form 144 notices for Clean Harbors Inc are on file.