John T. Preston

Companies

• Clean HarborsBoard member Sep 21, 2006 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Clean Harbors CLH7,044 shares²$2.2M at $319.13May 20, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• May 20, 2026Granted 652 shares of Clean Harbors²
• May 21, 2025Granted 789 shares of Clean Harbors³
• May 22, 2024Granted 836 shares of Clean Harbors⁴
• Mar 14, 2024Sold 1,913 shares at $188.36 of Clean Harbors⁵
• Aug 16, 2023Sold 2,095 shares at $173.68 of Clean Harbors⁶
• May 24, 2023Granted 1,148 shares of Clean Harbors⁷
• Mar 2, 2023Sold 3,750 shares at $134.90 of Clean Harbors⁸
• Aug 8, 2022Sold 2,168 shares at $111.50 of Clean Harbors⁹
• May 25, 2022Granted 1,849 shares of Clean Harbors¹⁰
• Jan 3, 2022Granted 257 shares of Clean Harbors¹¹