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Mares Michael S JR

Disclosed activity across 1 company

Tapewire entity
40637
SEC CIK
0001763820

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
CALIFORNIA WATER SERVICE GROUPCWT · Entity 4212SVP OperationsSeptember 04, 2026September 08, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

CALIFORNIA WATER SERVICE GROUP

Report date September 04, 2026 · Filed September 08, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect8,251.915 Ending reported balance After 2026-09-05 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-09-04 · Tax withholding · Disposed 69 · Balance 8,318.915

F1: 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

Row 2 · 2026-09-05 · Tax withholding · Disposed 67 · Balance 8,251.915

F2: 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 June 5, 2024.

Filing footnotes · ownership attribution and instrument terms

F1: 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

F2: 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 June 5, 2024.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
December 02, 2022 Filed Dec 5, 2022 16:56 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 43 $64.30 $2,764.90
Disclosure

SEC source: 0001214659-22-014507 · marketforms-57690.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,116

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 (RSA) Award #598.

Read SEC document
September 03, 2022 Filed Sep 6, 2022 20:29 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 28 $58.44 $1,636.32
Disclosure

SEC source: 0001214659-22-010921 · marketforms-57018.xml · nonDerivative · entry 2

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,159

F2 · 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 (RSA) Award #525.

Read SEC document
September 02, 2022 Filed Sep 6, 2022 20:29 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 44 $58.44 $2,571.36
Disclosure

SEC source: 0001214659-22-010921 · marketforms-57018.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,187

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 (RSA) Award #598.

Read SEC document
June 03, 2022 Filed Jun 6, 2022 18:17 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 28 $54.96 $1,538.88
Disclosure

SEC source: 0001214659-22-007838 · marketforms-56349.xml · nonDerivative · entry 2

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,231

F2 · 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 (RSA) Award #525.

Read SEC document
June 02, 2022 Filed Jun 6, 2022 18:17 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 43 $55.21 $2,374.03
Disclosure

SEC source: 0001214659-22-007838 · marketforms-56349.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,259

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 (RSA) Award #598.

Read SEC document
March 05, 2022 Filed Mar 8, 2022 01:44 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 761 $58.63 $44,617.43
Disclosure

SEC source: 0001214659-22-003709 · marketforms-55707.xml · nonDerivative · entry 4

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,302

F4 · 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 Performance Stock Unit (PSU) Award #505.

Read SEC document
March 05, 2022 Filed Mar 8, 2022 01:44 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 GrantCommon Stock 1,389 $0.00 $0.00
Disclosure

SEC source: 0001214659-22-003709 · marketforms-55707.xml · nonDerivative · entry 3

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,063

F3 · shares: On 3/5/2019, the reporting person was granted a Performance Stock Unit (PSU) of 875 shares of common stock. The PSU vested in full based on satisfaction of certain performance criteria approved by the Board of Directors. The performance criteria was met resulting in 159% payout of the original goal.

Read SEC document
March 05, 2022 Filed Mar 8, 2022 01:44 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 41 $58.63 $2,403.83
Disclosure

SEC source: 0001214659-22-003709 · marketforms-55707.xml · nonDerivative · entry 2

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,674

F2 · 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 (RSA) Award #503.

Read SEC document
March 03, 2022 Filed Mar 8, 2022 01:44 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 39 $57.01 $2,223.39
Disclosure

SEC source: 0001214659-22-003709 · marketforms-55707.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,715

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 (RSA) Award #525.

Read SEC document
March 02, 2022 Filed Mar 3, 2022 22:47 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 247 $56.90 $14,054.30
Disclosure

SEC source: 0001214659-22-003603 · marketforms-55672.xml · nonDerivative · entry 2

Mares Michael S JR · CIK 0001763820 · VP, Rates and Regulatory Aff

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,754

F2 · 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 (RSA) Award #598.

F3 · balance_after: Includes shares acquired through Dividend Reinvestment.

Read SEC document
March 01, 2022 Filed Mar 3, 2022 22:47 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 GrantCommon Stock 1,278 $0.00 $0.00
Disclosure

SEC source: 0001214659-22-003603 · marketforms-55672.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · VP, Rates and Regulatory Aff

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,969

F1 · shares: Restricted stock granted 3/1/2022 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3. RSA vests with one-third on March 1, 2023, with the remaining 2/3 vesting quarterly over the succeeding 24 months.

Read SEC document
January 04, 2022 Filed Jan 5, 2022 23:53 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 94 $69.87 $6,567.78
Disclosure

SEC source: 0001214659-22-000366 · marketforms-54980.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,691

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 (RSA) Award #565.

Read SEC document
December 05, 2021 Filed Dec 6, 2021 22:48 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 29 $65.36 $1,895.44
Disclosure

SEC source: 0001214659-21-012754 · marketforms-54511.xml · nonDerivative · entry 2

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,785

F2 · 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 (RSA) Award #503.

Read SEC document
December 03, 2021 Filed Dec 6, 2021 22:48 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 28 $65.36 $1,830.08
Disclosure

SEC source: 0001214659-21-012754 · marketforms-54511.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,814

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 (RSA) Award #525.

Read SEC document
September 05, 2021 Filed Sep 7, 2021 17:23 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 29 $64.49 $1,870.21
Disclosure

SEC source: 0001214659-21-009332 · marketforms-53738.xml · nonDerivative · entry 2

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,842

F2 · 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 (RSA) Award #503.

Read SEC document
September 03, 2021 Filed Sep 7, 2021 17:23 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 28 $64.49 $1,805.72
Disclosure

SEC source: 0001214659-21-009332 · marketforms-53738.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,871

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 (RSA) Award #525.

Read SEC document
June 05, 2021 Filed Jun 7, 2021 17:35 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 29 $56.66 $1,643.14
Disclosure

SEC source: 0001214659-21-006349 · marketforms-53052.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,899

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 (RSA) Award #503.

Read SEC document
June 03, 2021 Filed Jun 4, 2021 20:15 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 27 $56.94 $1,537.38
Disclosure

SEC source: 0001214659-21-006311 · marketforms-53051.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,909

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 (RSA) Award #525.

Read SEC document
March 05, 2021 Filed Mar 9, 2021 02:03 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 34 $52.96 $1,800.64
Disclosure

SEC source: 0001214659-21-002874 · marketforms-51799.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,936

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 (RSA) Award #503.

Read SEC document
March 03, 2021 Filed Mar 4, 2021 22:19 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 Tax withholdingCommon Stock 130 $53.21 $6,917.30
Disclosure

SEC source: 0001214659-21-002742 · marketforms-51754.xml · nonDerivative · entry 2

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,970

F2 · 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) Award #525.

Read SEC document
March 02, 2021 Filed Mar 4, 2021 22:19 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 GrantCommon Stock 1,131 $0.00 $0.00
Disclosure

SEC source: 0001214659-21-002742 · marketforms-51754.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,100

F1 · shares: Restricted stock granted 3/2/2021 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3. RSA vests with one-third on March 2, 2022, with the remaining 2/3 vesting quarterly over the succeeding 24 months.

Read SEC document
January 04, 2021 Filed Jan 6, 2021 20:59 UTC CALIFORNIA WATER SERVICE GROUP CWT · Entity 4212 GrantCommon Stock 203 $0.00 $0.00
Disclosure

SEC source: 0001214659-21-000206 · marketforms-50897.xml · nonDerivative · entry 1

Mares Michael S JR · CIK 0001763820 · Vice President, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,789

F1 · shares: Restricted stock granted 01/04/2021 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3. RSA vests with a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date. Includes dividend reinvestment.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.