Michael B Luu - 05 Mar 2026 Form 4 Insider Report for CALIFORNIA WATER SERVICE GROUP (CWT)

Role
SVP Corp Svce & Chief Risk Of
Signature
By: /s/ Michelle R. Mortensen For: Michael B Luu
Issuer symbol
CWT
Transactions as of
05 Mar 2026
Net transactions value
$0
Form type
4
Filing time
09 Mar 2026, 18:13:22 UTC
Previous filing
05 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Luu Michael B SVP Corp Svce & Chief Risk Of 1720 NORTH FIRST STREET, SAN JOSE By: /s/ Michelle R. Mortensen For: Michael B Luu 09 Mar 2026 0001583179

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CWT Common Stock Tax liability -76 -0.32% $45.78* 23,968 05 Mar 2026 Direct F1
transaction CWT Common Stock Award +900 +3.8% $0.000000* 24,868 07 Mar 2026 Direct F2
transaction CWT Common Stock Tax liability -504 -2% $45.59* 24,364 07 Mar 2026 Direct F3
transaction CWT Common Stock Award +205 +0.84% $0.000000* 24,569 07 Mar 2026 Direct F4
transaction CWT Common Stock Tax liability -115 -0.47% $45.59* 24,454 07 Mar 2026 Direct F3
transaction CWT Common Stock Tax liability -59 -0.24% $45.59* 24,395 07 Mar 2026 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents the number of shares withheld by and surrendered to the Issuer to satisfy the tax withholding obligations that arose in connection with the vesting of the Restricted Stock Award (RSA)
F2 The reporting person was granted a Performance Stock Unit (PSU) award on 3/7/2023. The PSU vested in full based on the satisfaction of certain performance criteria approved by the Board of Directors. The performance criteria was met resulting in 46% payout of the original goal
F3 Represents the number of shares withheld by and surrendered to the Issuer to satisfy the tax withholding obligations that arose in connection with the vesting of a Performance Stock Unit (PSU) Award.
F4 The reporting person was granted a Performance Stock Unit (PSU) award on 6/1/2023. The PSU vested in full based on the satisfaction of certain performance criteria approved by the Board of Directors. The performance criteria was met resulting in 46% payout of the original goal