KROPELNICKI MARTIN A 4

What Happened
Martin A. Kropelnicki, Chairman, President & CEO of California Water Service Group (CWT), received an award of 6,507 shares on 2026-03-07 from a vested performance stock unit (PSU). To satisfy tax withholding obligations connected with the vesting of equity awards, a total of 4,695 shares were withheld/surrendered (disposed) across transactions on 2026-03-05 and 2026-03-07, generating proceeds of $214,139. The reported disposals were recorded as tax withholding (transaction code F); the acquisition was an award/grant (transaction code A).

Key Details

• Transactions:
  • 2026-03-05: 493 shares withheld/surrendered at $45.78 — $22,570 (F)
  • 2026-03-07: 6,507 shares awarded (PSU vest) at $0.00 — $0 (A)
  • 2026-03-07: 3,817 shares withheld/surrendered at $45.59 — $174,017 (F)
  • 2026-03-07: 385 shares withheld/surrendered at $45.59 — $17,552 (F)
• Total withheld/surrendered: 4,695 shares for $214,139.
• Footnotes: The PSU was originally granted 3/7/2023 and vested based on performance, resulting in a 46% payout of the original target (F2). Withheld shares were surrendered to satisfy tax withholding from both an RSA and the PSU vest (F1, F3).
• Shares owned after the transactions were not provided in the summary.
• Filing date: Form 4 filed 2026-03-09 for transactions dated 2026-03-05 and 2026-03-07 — appears timely based on typical Form 4 deadlines.

Context
This was primarily an equity award vesting (not an open-market purchase) with routine share withholding to cover taxes — a common administrative step that results in share disposals but does not necessarily indicate a change in the insider’s investment view. The PSU payout was partial relative to target (46% of original goal).