Quirk Alison A. 4

What Happened Alison A. Quirk, a member of the board of directors of Clean Harbors, was granted 652 shares of restricted common stock on 2026-05-20. The transaction is recorded as an award (code A) at $0.00 per share (total reported cost $0). The award was granted to a non-employee director and will vest according to the footnote.

Key Details

• Transaction date: 2026-05-20; SEC filing date: 2026-05-22 (filed timely).
• Grant: 652 shares @ $0.00 (award); reported acquisition value $0.
• Shares owned after transaction: not specified in the Form 4 filing.
• Footnote: Award vests 100% upon the date of the next annual meeting of shareholders (non-employee director grant).
• Transaction code: A (award/grant to acquire securities).

Context This is a standard non-cash equity award to a non-employee director, commonly used to compensate directors and align their interests with shareholders. Such awards are not the same as an open-market purchase and do not necessarily indicate a personal cash investment by the insider.