Clean Harbors

At a glance

Clean Harbors reported 2025 revenue of $6.03B, up 2.4% from $5.89B in 2024. Over 4 years since 2021 ($3.81B), that is growth of about 12.2% a year. Operating margin was 11.2%, up from 9.1% in 2021. 2025 was the highest revenue year in this period.

In the last 12 months 10 insiders reported 1 open-market purchase ($136K) and 13 sales ($63.4M). None of the sales were flagged as 10b5-1 plan trades. The largest was a sale of $29.3M by EXEC CHAIR, CTO. Alan S Mckim on Mar 5, 2026. Net, insiders were sellers of $63.3M.

Clean Harbors filed 10 current reports (Form 8-K) in the last 12 months, most often for results of operations (4), other events (3), material agreement (1) and new financial obligation (1). The latest officer or director change was reported on May 20, 2026. It reported a material agreement or a completed acquisition or disposal 1 time.

1 of the 20 investors tracked here held Clean Harbors at the last quarter end, worth $24.6M combined. It is the largest weight for Renaissance Technologies (0% of its portfolio). New this quarter: Renaissance Technologies.

Annual results

Fiscal year ends Dec 31 · incorporated in MA

Tracked investors holding (13F)

Weight is the share of each investor's portfolio, as of the quarter end.