CLH insider trading — Clean Harbors Inc
Over the last 90 days, insiders at Clean Harbors Inc (CLH) made 0 open-market purchases worth $0 and 2 open-market sales worth $1.05M, making them net sellers by $1.05M. The largest sale was by Gerstenberg Eric W (CO-CEO), who sold 2,500 shares for $803K on Aug 14, 2026.
Updated Oct 16, 2026.
Recent CLH insider transactions
Every Form 4 filed by Clean Harbors Inc officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 14, 2026 | Gerstenberg Eric W | CO-CEO | S · Sale | Direct | 2,500 | $321.34 | $803K | Form 4 |
| Jul 1, 2026 | Battles Michael Louis | CO-CEO | F · Tax withholding | Direct | 1,032 | $290.74 | $300K | Form 4 |
| Jul 1, 2026 | Curtis George L | EXEC. VICE PRESIDENT (CHESI) | F · Tax withholding | Direct | 1,757 | $290.74 | $511K | Form 4 |
| Aug 3, 2026 | Robertson Andrea | Director | S · Sale | Direct | 789 | $314.01 | $248K | Form 4 |
| Jul 17, 2026 | Mckim Alan S | EXEC CHAIR, CTO. | F · Tax withholding | Direct | 1,265 | $310.58 | $393K | Form 4 |
CLH insider trading FAQ
Are insiders buying CLH stock?
Not on the open market. In the last 90 days, Clean Harbors Inc insiders made no open-market purchases, and 2 open-market sales totaling $1.05M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading CLH?
Recent sellers: Gerstenberg Eric W, Robertson Andrea.
Where does CLH insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.