Gabriel Sharon M. 4

What Happened

• Gabriel Sharon, EVP and CIO of Clean Harbors (CLH), had 727 shares withheld to satisfy tax withholding on vested equity (paid at $288.93 per share, $210,052 total) and had 1,401 restricted shares forfeited back to the company (no cash value) on March 13, 2026. These were not open-market sales but administrative dispositions related to vesting and performance-based forfeiture.

Key Details

• Transaction date: 2026-03-13 (filed on 2026-03-17)
• Withholding: 727 shares withheld at $288.93/share, value $210,052 (code F — tax withholding)
• Forfeiture: 1,401 shares disposed to issuer at $0.00 (code D — forfeiture due to unmet performance targets)
• Shares owned after transaction: Not specified in the provided filing excerpt
• Footnotes: F1 = tax withholding by surrender of shares incident to vesting; F2 = restricted stock forfeited because performance targets under the Long Term Equity Incentive Program were not met
• Filing timeliness: Filed 4 days after the transaction date (3/13 → 3/17); this appears to be within the standard two business-day Form 4 filing window (timely)

Context

• These actions reflect routine administrative adjustments to an equity award: shares withheld to cover taxes when awards vest, and forfeiture of performance-based restricted shares when targets aren't achieved. They are not market sales and do not necessarily signal the insider’s buying/selling sentiment.