WALKER LORI A 4

What Happened
Lori A. Walker, a director of Compass Minerals International (CMP), reported the exercise/conversion of derivative awards on March 5, 2026. The filing shows 11,905 shares were acquired via conversion/exercise (transaction code M) at an exercise price of $0.00 and the same 11,905 shares were concurrently disposed (also reported under code M) at $0.00. The $0.00 price indicates these were conversions of award units (not a cash purchase); the filing does not report cash proceeds.

Key Details

• Transaction date: 2026-03-05 (reported on Form 4 filed 2026-03-09). Filing appears timely (within required reporting window).
• Shares acquired (via conversion/exercise): 11,905 at $0.00.
• Shares disposed (simultaneously): 11,905 at $0.00.
• Shares owned after transaction: not specified in the provided excerpt; the filing notes ownership was adjusted to reflect the distribution.
• Footnote F1: 990 deferred stock units were distributed to the reporting person on March 5, 2026 in the form of common stock and ownership was adjusted accordingly.
• Footnote F2: Describes an annual grant of restricted stock units that vest in one year in connection with director service (context on awards, not a separate reported sale/purchase).

Context

• Transaction code M denotes exercise or conversion of a derivative (for example, vested RSUs or deferred stock units being converted to common shares). The equal acquire-and-dispose amounts suggest a conversion with an immediate disposition of the resulting shares; the filing itself does not state the reason (e.g., sale, tax withholding, transfer).
• This appears to be routine award-related activity by a director rather than an open-market purchase indicating additional personal investment.