Welch John R. - Insider Non-Derivative Transactions at CLEAN HARBORS INC (CLH) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Dec 17, 2025, Welch John R.'s relationship to CLEAN HARBORS INC (CLH) is Director, and currently has 10,987 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other CLH insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Welch John R. - Insider Non-Derivative Transactions of CLH Common Stock

Welch John R. - Insider Non-Derivative Transactions at CLH

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Dec 18, 2025	G -- (Common Stock)	415	0	10987
May 29, 2025	Sell -- (Common Stock)	1250	228.51	11402
May 22, 2025	Acquisition -- (Common Stock)	789	0	12652
May 23, 2024	Acquisition -- (Common Stock)	836	0	11863
Feb 27, 2024	G -- (Common Stock)	1400	0	11027
Jun 3, 2023	Sell -- (Common Stock)	1000	150.43	12427
May 25, 2023	Acquisition -- (Common Stock)	1148	0	13427