CLH · Insider Trading
Clean Harbors, Inc
Every open-market purchase and sale reported by CLH officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-11-03 | Charles H. Geer II | EVP, Industrial Services | F | −294 | −$88.82K |
| 2026-11-02 | Karyn Polito | Director | Buy | +125 | +$39.35K |
| 2026-08-18 | Eric W Gerstenberg | CO-CEO | Sell | −2,500 | −$803.35K |
| 2026-08-14 | Eric W Gerstenberg | CO-CEO | F | −564 | −$163.98K |
| 2026-08-14 | Eric W Gerstenberg | CO-CEO | Sell | −1,000 | −$293.00K |
| 2026-08-14 | Eric J. Dugas | EVP CHIEF FINANCIAL OFFICER | Sell | −2,788 | −$784.29K |
| 2026-08-14 | Eric W Gerstenberg | CO-CEO | Sell | −2,500 | −$699.65K |
| 2026-08-14 | Eric W Gerstenberg | CO-CEO | MIXED | −3,143 | −$282.28K |
| 2026-08-14 | Eric J. Dugas | EVP CHIEF FINANCIAL OFFICER | MIXED | −1,954 | −$182.03K |
| 2026-08-14 | Eric J. Dugas | EVP CHIEF FINANCIAL OFFICER | F | −447 | −$129.96K |
| 2026-08-12 | Michael Louis Battles | CO-CEO | F | −1,032 | −$300.04K |
| 2026-08-11 | George L Curtis | EXEC. VICE PRESIDENT (CHESI) | F | −1,757 | −$510.83K |
| 2026-08-03 | Andrea Robertson | Director | Sell | −789 | −$247.75K |
| 2026-07-20 | Alan S McKim | EXEC CHAIR, CTO. | F | −1,265 | −$392.88K |
| 2026-07-06 | Rebecca Underwood | PRESIDENT & EVP FACILITIES | F | −311 | −$90.42K |
| 2026-07-06 | Eric J. Dugas | EVP CHIEF FINANCIAL OFFICER | F | −447 | −$129.96K |
| 2026-07-06 | Brian P Weber | EVP (CHESI) | F | −814 | −$236.66K |
| 2026-07-06 | Charles H. Geer II | EVP, Industrial Services | F | −40 | −$11.63K |
| 2026-07-06 | Sharon M. Gabriel | EVP/CIO (CHESI) | F | −359 | −$104.38K |
| 2026-07-06 | Alan S McKim | EXEC CHAIR, CTO. | F | −1,343 | −$390.46K |
| 2026-07-06 | Eric W Gerstenberg | CO-CEO | F | −564 | −$163.98K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Alan S McKim | EXEC CHAIR, CTO. | 130,154 | $37.55M |
| Michael Louis Battles | CO-CEO | 94,355 | $27.22M |
| Eric W Gerstenberg | CO-CEO | 56,793 | $16.39M |
| Brian P Weber | EVP (CHESI) | 47,914 | $13.82M |
| George L Curtis | EXEC. VICE PRESIDENT (CHESI) | 44,291 | $12.78M |
| Sharon M. Gabriel | EVP/CIO (CHESI) | 20,706 | $5.97M |
| Rebecca Underwood | PRESIDENT & EVP FACILITIES | 18,373 | $5.30M |
| Eric J. Dugas | EVP CHIEF FINANCIAL OFFICER | 17,620 | $5.08M |
| Charles H. Geer II | EVP, Industrial Services | 10,505 | $3.03M |
| Andrea Robertson | Director | 8,979 | $2.59M |
| Karyn Polito | Director | 4,252 | $1.23M |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the CLH quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.