Harrison Robert W. 4

What Happened Robert W. Harrison, EVP, Environment, Health & Safety (EHS) at Clean Harbors, reported dispositions on 2026-03-13 totaling 386 shares. Eighteen shares were withheld to cover tax liability at $288.93 per share (proceeds reported as $5,201). An additional 368 restricted shares were forfeited back to the company with $0 proceeds due to unmet performance targets.

Key Details

• Transaction dates: 2026-03-13 (reported in Form 4 filed 2026-03-17)
• Dispositions:
  • 18 shares @ $288.93 (withheld for tax; reported proceeds $5,201) — footnote F1
  • 368 shares @ $0.00 (forfeiture of restricted stock for unmet performance targets) — footnote F2
• Total shares disposed: 386
• Shares owned after transaction: not specified in the filing
• Footnotes:
  • F1: Payment of tax liability by withholding of securities incident to vesting (Rule 16b-3)
  • F2: Restricted stock forfeited due to company not achieving performance targets under Long Term Equity Incentive Program
• No indication in the filing of a trading plan (10b5-1) or that the transactions were open-market purchases

Context

• The 18-share withholding is a routine tax-related disposition tied to vesting; the 368-share transaction is a forfeiture (not a market sale) because performance targets were not met. Such actions are administrative and do not necessarily indicate the insider’s view on the company’s stock price.