CWT

SEC source: 0001629473-26-000004 · edgardoc.xml · nonDerivative · entry 1

Mortensen Michelle R · CIK 0001629473 · VP Corp Sect & Chief of Staff

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,797.8

F1 · shares: 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)

SEC source: 0001763798-26-000004 · edgardoc.xml · nonDerivative · entry 1

Milleman Greg A · CIK 0001763798 · VP Rates & Regulatory Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,030.166

F1 · shares: 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)

SEC source: 0001763820-26-000004 · edgardoc.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · SVP Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,069.6

F1 · shares: 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)

SEC source: 0001502013-26-000004 · edgardoc.xml · nonDerivative · entry 1

Lynch James Patrick · CIK 0001502013 · SVP CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,205.699

F1 · shares: 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)

SEC source: 0001583179-26-000004 · edgardoc.xml · nonDerivative · entry 1

Luu Michael B · CIK 0001583179 · SVP Corp Svce & Chief Risk Of

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,967.735

F1 · shares: 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)

SEC source: 0001222882-26-000004 · edgardoc.xml · nonDerivative · entry 1

KROPELNICKI MARTIN A · CIK 0001222882 · Chairman President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,523.307

F1 · shares: 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)

SEC source: 0001998622-26-000004 · edgardoc.xml · nonDerivative · entry 1

James Sophie Marwieh · CIK 0001998622 · VP Water Qual & Envir Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,037.706

F1 · shares: 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)

SEC source: 0001996303-26-000004 · edgardoc.xml · nonDerivative · entry 1

Jenkins Kenneth G · CIK 0001996303 · VP Water Res Plan & Sustain

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,095

F1 · shares: 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)

SEC source: 0001629475-26-000004 · edgardoc.xml · nonDerivative · entry 1

Dean Shannon C · CIK 0001629475 · SR. VP, Cust Svc & Chief Sust

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,509.266

F1 · shares: 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)

SEC source: 0001965747-26-000004 · edgardoc.xml · nonDerivative · entry 1

Bunting Shawn C · CIK 0001965747 · Sr. VP, GC and Business Dev

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,574

F1 · shares: 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)

SEC source: 0001965544-26-000002 · edgardoc.xml · nonDerivative · entry 2

Peters Todd Kenneth · CIK 0001965544 · Vice President, Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,246

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001958895-26-000002 · edgardoc.xml · nonDerivative · entry 2

Scanlon Thomas A · CIK 0001958895 · Corporate Controller & PAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,521.135

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001668263-26-000002 · edgardoc.xml · nonDerivative · entry 2

Ouyang Elissa Y · CIK 0001668263 · VP Facilities Fleet & Procure

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,785

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001629473-26-000002 · edgardoc.xml · nonDerivative · entry 2

Mortensen Michelle R · CIK 0001629473 · VP Corp Sect & Chief of Staff

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,877.8

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001763798-26-000002 · edgardoc.xml · nonDerivative · entry 2

Milleman Greg A · CIK 0001763798 · VP Rates & Regulatory Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,103.166

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001763820-26-000002 · edgardoc.xml · nonDerivative · entry 2

Mares Michael S JR · CIK 0001763820 · SVP Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,144.6

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001502013-26-000002 · edgardoc.xml · nonDerivative · entry 2

Lynch James Patrick · CIK 0001502013 · SVP CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,261.699

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001583179-26-000002 · edgardoc.xml · nonDerivative · entry 2

Luu Michael B · CIK 0001583179 · SVP Corp Svce & Chief Risk Of

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,043.735

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001222882-26-000002 · edgardoc.xml · nonDerivative · entry 2

KROPELNICKI MARTIN A · CIK 0001222882 · Chairman President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 147,016.307

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001996303-26-000002 · edgardoc.xml · nonDerivative · entry 2

Jenkins Kenneth G · CIK 0001996303 · VP Water Res Plan & Sustain

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,137

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001998622-26-000002 · edgardoc.xml · nonDerivative · entry 2

James Sophie Marwieh · CIK 0001998622 · VP Water Qual & Envir Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,094.706

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0002058905-26-000003 · edgardoc.xml · nonDerivative · entry 2

HAMNER KRISTAN A · CIK 0002058905 · VP, Chief Human Resource Offcr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,943.457

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001629475-26-000002 · edgardoc.xml · nonDerivative · entry 2

Dean Shannon C · CIK 0001629475 · SR. VP, Cust Svc & Chief Sust

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,589.266

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001965747-26-000002 · edgardoc.xml · nonDerivative · entry 2

Bunting Shawn C · CIK 0001965747 · Sr. VP, GC and Business Dev

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,650

F3 · shares: Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025

SEC source: 0001965544-26-000002 · edgardoc.xml · nonDerivative · entry 1

Peters Todd Kenneth · CIK 0001965544 · Vice President, Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,425

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001958895-26-000002 · edgardoc.xml · nonDerivative · entry 1

Scanlon Thomas A · CIK 0001958895 · Corporate Controller & PAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,658.135

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

SEC source: 0001668263-26-000002 · edgardoc.xml · nonDerivative · entry 1

Ouyang Elissa Y · CIK 0001668263 · VP Facilities Fleet & Procure

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,084

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

SEC source: 0001629473-26-000002 · edgardoc.xml · nonDerivative · entry 1

Mortensen Michelle R · CIK 0001629473 · VP Corp Sect & Chief of Staff

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,204.8

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001763798-26-000002 · edgardoc.xml · nonDerivative · entry 1

Milleman Greg A · CIK 0001763798 · VP Rates & Regulatory Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,401.166

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

SEC source: 0001763820-26-000002 · edgardoc.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · SVP Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,447.6

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001502013-26-000002 · edgardoc.xml · nonDerivative · entry 1

Lynch James Patrick · CIK 0001502013 · SVP CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,487.699

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

SEC source: 0001583179-26-000002 · edgardoc.xml · nonDerivative · entry 1

Luu Michael B · CIK 0001583179 · SVP Corp Svce & Chief Risk Of

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,352.735

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

SEC source: 0001222882-26-000002 · edgardoc.xml · nonDerivative · entry 1

KROPELNICKI MARTIN A · CIK 0001222882 · Chairman President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,033.307

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

SEC source: 0001996303-26-000002 · edgardoc.xml · nonDerivative · entry 1

Jenkins Kenneth G · CIK 0001996303 · VP Water Res Plan & Sustain

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,420

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001998622-26-000002 · edgardoc.xml · nonDerivative · entry 1

James Sophie Marwieh · CIK 0001998622 · VP Water Qual & Envir Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,327.706

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

SEC source: 0002058905-26-000003 · edgardoc.xml · nonDerivative · entry 1

HAMNER KRISTAN A · CIK 0002058905 · VP, Chief Human Resource Offcr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,133.457

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through the Employee Stock Purchase Program.

SEC source: 0001629475-26-000002 · edgardoc.xml · nonDerivative · entry 1

Dean Shannon C · CIK 0001629475 · SR. VP, Cust Svc & Chief Sust

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,914.266

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

SEC source: 0001654999-26-000004 · edgardoc.xml · nonDerivative · entry 1

Aliff Gregory E · CIK 0001654999 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,395.49

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001965747-26-000002 · edgardoc.xml · nonDerivative · entry 1

Bunting Shawn C · CIK 0001965747 · Sr. VP, GC and Business Dev

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,960

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001663507-26-000004 · edgardoc.xml · nonDerivative · entry 1

Wagner Patricia K · CIK 0001663507 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,213.8

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001513841-26-000002 · edgardoc.xml · nonDerivative · entry 1

Snow Lester A · CIK 0001513841 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,416

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Amount of securities beneficially owned following reported transaction reflects the transfer of 9,937 shares in a transaction exempt from Section 16 pursuant to Rule 16a-12. The reported includes shares acquired through Dividend Reinvestment.

SEC source: 0001715865-26-000002 · edgardoc.xml · nonDerivative · entry 1

Pottenger Carol M · CIK 0001715865 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,186.8

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001863358-26-000002 · edgardoc.xml · nonDerivative · entry 1

Maldonado Yvonne Aida · CIK 0001863358 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,634.69

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001473188-26-000002 · edgardoc.xml · nonDerivative · entry 1

Patton Charles R. · CIK 0001473188 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,062.27

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001174957-26-000002 · edgardoc.xml · nonDerivative · entry 1

MORRIS SCOTT L · CIK 0001174957 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,209.23

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001495768-26-000002 · edgardoc.xml · nonDerivative · entry 1

Krummel Thomas M · CIK 0001495768 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,504.8

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001998917-26-000002 · edgardoc.xml · nonDerivative · entry 1

Kightlinger Jeffrey · CIK 0001998917 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,354.7

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001745383-26-000010 · edgardoc.xml · nonDerivative · entry 1

Esque Shelly Marian · CIK 0001745383 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,331

F1 · shares: Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.

F2 · balance_after: Includes shares acquired through Dividend Reinvestment.

SEC source: 0001214659-25-018389 · marketforms-71697.xml · nonDerivative · entry 1

Mortensen Michelle R · CIK 0001629473 · VP, Corp Sec &Chief of Staff

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,511.8

F1 · shares: The sale of 924 shares was executed in a single transaction with the share price of $43.34. The reporting person hereby undertakes to provide upon request to the SEC staff the issuer or security holder of the full issuer information regarding the number shares and price at which the transaction was effected.

SEC source: 0001502013-25-000006 · edgardoc.xml · nonDerivative · entry 1

Lynch James Patrick · CIK 0001502013 · SVP CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,618.9

F1 · shares: These shares were purchased in multiple transactions at the price of $42.795. The reporting person undertakes to provide full information regarding the number of shares purchased