Clean Harbors, Inc
A North American environmental and industrial services company that collects, treats, and disposes of hazardous and non-hazardous waste, and through its Safety-Kleen arm re-refines used oil into fresh base oil and lubricants for manufacturers, refineries, and others. It began in 1980 when Alan McKim started a four-person tank-cleaning business in the Boston area with a single truck. One of its early jobs was cleaning up the 1984 oil spill from the beached tanker Eldia off Cape Cod, helping launch its emergency-response reputation.
Sold 565.5K
Granted 72.6K · Bought 2.0K · Sold 10.0K
Granted 13.6K · Sold 16.6K
Granted 4.6K
Granted 56.2K · Sold 41.5K
Granted 2.3K
Granted 11.9K · Sold 3.5K
Granted 10.4K
Granted 8.4K · Sold 4.4K
Granted 19.5K
Granted 11.4K · Bought 1.1K · Sold 12.5K
Granted 2.3K · Sold 4.6K
Granted 2.3K · Sold 2.0K
Granted 2.3K
Granted 2.3K
Granted 2.3K · Sold 2.0K
Granted 2.3K · Sold 1.9K
Granted 4.2K · Sold 122
Granted 2.3K · Sold 836
Granted 2.3K
Granted 2.3K · Bought 460
Granted 2.3K · Sold 893
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| McKim Alan SEXEC CHAIR, CTO., Director · 27 transactions | — | 2.32M | — | — | 565.5K |
| Battles Michael LouisCO-CEO, Director · 24 transactions | +31% | 97.5K | 72.6K | 2.0K | 10.0K |
| Weber Brian PEVP (CHESI) · 23 transactions | -28.2% | 48.7K | 13.6K | — | 16.6K |
| Curtis George LEXEC. VICE PRESIDENT (CHESI) · 14 transactions | -4.3% | 46.0K | 4.6K | — | — |
| Gerstenberg Eric WCO-CEO · 26 transactions | -49.9% | 38.9K | 56.2K | — | 41.5K |
| Galante Edward GDirector · 3 transactions | +9.8% | 25.5K | 2.3K | — | — |
| Gabriel Sharon M.EVP/CIO (CHESI) · 21 transactions | -11.2% | 22.5K | 11.9K | — | 3.5K |
| Underwood RebeccaPRESIDENT & EVP FACILITIES · 17 transactions | +37.1% | 18.7K | 10.4K | — | — |
| Speights RobertPRESIDENT, INDUSTRIAL SERVICES · 14 transactions | -57.7% | 16.3Kas of May 2025 | 8.4K | — | 4.4K |
| Diderich JeroenEVP&President of Sales&Service · 8 transactions | — | 16.2K | 19.5K | — | — |
| Dugas Eric J.EVP CHIEF FINANCIAL OFFICER · 25 transactions | -46.5% | 15.3K | 11.4K | 1.1K | 12.5K |
| States LaurenDirector · 15 transactions | -20.7% | 11.4K | 2.3K | — | 4.6K |
| Welch John R.Director · 7 transactions | -12.4% | 10.9K | 2.3K | — | 2.0K |
| Geer Charles H. IIEVP, Industrial Services · 6 transactions | — | 10.8K | 2.3K | — | — |
| Willett RobertDirector · 3 transactions | +29.4% | 10.0K | 2.3K | — | — |
| Robertson AndreaDirector · 8 transactions | -8.4% | 9.8K | 2.3K | — | 2.0K |
| Preston John TDirector · 4 transactions | +5.4% | 7.0K | 2.3K | — | 1.9K |
| Harrison Robert W.EVP, EHS · 16 transactions | +101% | 7.0K | 4.2K | — | 122 |
| Reed Marcy L.Director · 4 transactions | +33.6% | 5.7K | 2.3K | — | 836 |
| Stewart Shelley JRDirector · 3 transactions | +101.4% | 4.5K | 2.3K | — | — |
| Polito KarynDirector · 4 transactions | +196.9% | 4.1K | 2.3K | 460 | — |
| Quirk Alison A.Director · 4 transactions | +61.6% | 3.6K | 2.3K | — | 893 |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 3 years: -662.8K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.