Weber Brian P 4

What Happened
Brian P. Weber, Executive Vice President (CHESI) of Clean Harbors, had 814 shares withheld to satisfy tax withholding obligations related to vested equity. The shares were valued at $290.74 each, for a total of $236,662. This was a withholding (tax payment) rather than an open-market sale or purchase.

Key Details

• Transaction date: 2026-07-01
• Filing date (Form 4): 2026-07-06 — filed after the typical two-business-day deadline for Form 4s for a 2026-07-01 transaction (appears late).
• Shares withheld/disposed: 814 shares at $290.74 per share — total value $236,662.
• Shares owned after transaction: Not disclosed in the provided filing excerpt.
• Footnote: F1 — Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b-3.
• Transaction code: F = Tax withholding incident to vesting (not a market sale).

Context
Tax-withholding dispositions are routine when restricted stock or other equity vests; the company or insider withholds shares to cover tax obligations. These transactions generally do not indicate a change in the insider’s market view, unlike voluntary open-market sales or purchases.