GERSTENBERG ERIC W 4

What Happened
Eric W. Gerstenberg, Co‑Chief Executive Officer of Clean Harbors, reported the sale of 1,000 shares of CLH common stock on 2026-03-18. The shares were disposed at $293.00 per share, generating proceeds of $293,000. The Form 4 was filed on 2026-03-19. This transaction is a sale (code “S”), not a purchase.

Key Details

• Transaction date: 2026-03-18
• Price per share: $293.00; Total proceeds: $293,000
• Transaction type: Sale (Form 4 code S), reported as “open market or private sale”
• Shares owned after transaction: not specified in the summary provided—see the full Form 4 for post‑transaction holdings
• Footnotes/plan: No 10b5‑1 plan, tax withholding, or other special footnotes were indicated in the information provided
• Timeliness: Filed on 2026-03-19 for a 2026-03-18 trade — appears timely (filed within one business day)

Context
Insider sales are often routine (liquidity, diversification, tax planning) and don’t necessarily indicate the executive’s view of company prospects. Purchases tend to be a stronger signal of confidence. This report notes a straightforward sale by an executive; investors who want full ownership details or additional context should review the complete SEC Form 4 filing (accession 0001211558-26-000008).