Clean Harbors (CLH) Co-CEO Eric Gerstenberg Sells 564 Shares

What Happened
Eric W. Gerstenberg, Co-CEO of Clean Harbors, had 564 shares withheld to satisfy tax withholding obligations related to vested compensation. The shares were recorded as disposed at an average price of $290.74, for a total value of $163,977. This Amended Form 4 corrects the prior filing (footnote F2) and clarifies the withholding treatment (footnote F1).

Key Details

• Transaction date: 2026-07-01
• Transaction type/code: Tax withholding incident to vesting (Code F)
• Shares withheld/disposed: 564 shares
• Price per share: $290.74; Total value: $163,977
• Footnotes: F1 = withholding of securities to pay tax liability under Rule 16b-3; F2 = correction to total number of shares held
• Filing: Amended Form 4 filed 2026-08-14 (filed after the transaction date)

Context
Withholding shares to cover taxes is a routine administrative disposition tied to compensation vesting, not an open-market sale driven by investment sentiment. Such transactions generally don’t signal a change in an insider’s view of the company. Note the filing is an amendment and was submitted after the transaction date; investors watching insider activity should weigh purchases more heavily than routine withholding disposals.