By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
It has been a mixed year for Clean Harbors Inc insiders: $136,000 bought by one person and $65.2 million sold by nine, so more selling than buying overall.
The largest purchase came from Polito Karyn (Director), about $136,000.
Zooming out by quarter: 4 quarters in a row of net selling by insiders. Insiders bought in 3 of the last 7 full quarters. CLH also shows up in congressional disclosures: 13 reported trades from two lawmakers in two years. On the institutional side, 660 funds reported holding CLH at the end of Q2 2026, and funds were split between buying and selling.
Are insiders buying or selling CLH stock?
In the last 12 months Clean Harbors Inc insiders made open-market purchases worth about $136,000 and sales worth about $65.2 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in CLH?
The most recent open-market insider trade in CLH was filed on 2026-08-18.
How many institutions own CLH?
660 investment managers reported holding CLH in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded CLH?
Yes. Members of Congress reported 13 trades in CLH over the past two years. The full list is free on CapitalSnitch.
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Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).