SCHEDULE 13G/A: Wellington Management Group Amends Clean Harbors Stake, Maintains Significant Ownership

Wellington Management Group LLP and its affiliates have filed an amended Schedule 13G, reporting a 9.8% beneficial ownership stake in Clean Harbors, Inc. as of March 31, 2025.

Summary

• Wellington Management Group LLP, along with its affiliates Wellington Group Holdings LLP, Wellington Investment Advisors Holdings LLP, and Wellington Management Company LLP, filed an Amendment No. 13 to Schedule 13G.
• The filing reports their beneficial ownership in Clean Harbors, Inc. Common Stock (CUSIP: 184496107).
• As of March 31, 2025, the aggregate amount beneficially owned by the group is 5,293,796 shares.
• This represents 9.8% of the class of Clean Harbors, Inc. Common Stock.
• Wellington Management Company LLP specifically holds shared voting power over 4,110,917 shares and shared dispositive power over 4,284,378 shares, representing 8.0% of the class.
• The securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

Sentiment

Score: 5

Explanation: The document is a neutral, factual report of beneficial ownership, with no positive or negative implications for the issuer's performance or outlook.

Future Outlook

NA

Industry Context

NA

Stakeholder Impact

• This filing indicates continued significant institutional investor confidence in Clean Harbors, Inc. by Wellington Management Group, which may be viewed positively by existing shareholders.

Key Dates

Keywords

Clean Harbors Inc., Wellington Management Group, Schedule 13G, Beneficial Ownership, Institutional Investor, Common Stock, SEC Filing, Investment Management