Underwood Rebecca 4

What Happened

• Rebecca Underwood, President & EVP Facilities of Clean Harbors (CLH), reported dispositions on 2026-03-13: 1,401 restricted shares were forfeited to the issuer (no cash value) and 125 shares were withheld to cover tax liability at $288.93/share, totaling $36,116.
• These were not open-market sales. The 125-share transfer was a tax-withholding incident to vesting; the 1,401-share disposition was a forfeiture under the company’s long-term incentive program.

Key Details

• Transaction date: 2026-03-13; Filing date: 2026-03-17 (filed within the typical 2-business-day Form 4 window).
• Prices/values: 125 shares withheld at $288.93 each = $36,116; 1,401 shares forfeited valued at $0.
• Transaction codes: F = tax withholding of shares; D = disposition to issuer (forfeiture).
• Footnotes: F1 — withholding of securities to pay tax liability incident to vesting under Rule 16b-3. F2 — restricted shares forfeited because performance targets were not met under the Long Term Equity Incentive Program.
• Shares owned after the transactions: not specified in the Form 4 filing.

Context

• Tax-withholding of vested shares and forfeiture for unmet performance targets are routine compensation-related actions and do not reflect an open-market sale or a personal cash liquidity decision.
• These dispositions reduce outstanding awarded shares but are not a direct signal of insider buying or selling activity in the market.