Quick Takeaways
- WELLINGTON MANAGEMENT GROUP LLP filed SCHEDULE 13G/A for Clean Harbors, Inc. Common Stock (CLH).
- Disclosed ownership: 9.7%.
- Date of event: 31 Dec 2025.
WELLINGTON MANAGEMENT GROUP LLP - 31 Dec 2025 SCHEDULE 13G/A Report for Clean Harbors, Inc. Common Stock (CLH)
- Filing Manager
- WELLINGTON MANAGEMENT GROUP LLP
- Reporting Manager
- Wellington Management Group LLP
- Security
- Clean Harbors, Inc. Common Stock
- Symbol
- CLH
- Shares outstanding
- 53,428,227 shares
- Disclosed Ownership
- 5,182,538 shares
- Ownership
- 9.7%
- Form type
- SCHEDULE 13G/A
- Filing time
- 10 Feb 2026, 11:19:49 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 07 May 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"WELLINGTON MANAGEMENT GROUP LLP disclosed 9.7% ownership in Clean Harbors, Inc. Common Stock (CLH) on 31 Dec 2025."
What Changed
- Previous schedule filing date: 07 May 2025.
- Current filing was accepted on 10 Feb 2026, 11:19.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (4)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Wellington Management Group LLP | 9.7% | 5,182,538 | 0 | 4,325,963 | Taisia Lowe | Regulatory Analyst | |
| Wellington Group Holdings LLP | 9.7% | 5,182,538 | 0 | 4,325,963 | Taisia Lowe | Regulatory Analyst | |
| Wellington Investment Advisors Holdings LLP | 9.7% | 5,182,538 | 0 | 4,325,963 | Taisia Lowe | Regulatory Analyst | |
| Wellington Management Company LLP | 7.9% | 5,182,538 | 0 | 4,036,402 | Taisia Lowe | Regulatory Analyst |