CWT · California Water Service Group · Insider Trading

$48.04 +0.50 (+1.05%)

S&P 600 member Russell 2000 member Rebalance outlook locked

Market Cap

$2.97B

61.84M

Volume · Oct 23 358.62K Avg daily vol (3M) 474.72K

Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 4 and 5. Form 3 supplies initial ownership rather than a trade; Form 4 must be filed within two business days of the trade.

Query insider transactions through the insider trading API or MCP →

Insider Sentiment Score

Peer-relative 0–100 rank of how aggressively insiders accumulated over the trailing 90 days. See the full ranking.

Net buyers

-2

Net shares bought

-0.01%

Net buy value

-$211,455

Date	Insider	Role	Type	Security	Shares	Price	Value	After
2026-09-05	Bunting Shawn C	Sr. VP, GC and Business Dev	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	69	$50.03	$3,452	4,573
2026-09-05	James Sophie Marwieh	VP Water Qual & Envir Affairs	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	50	$50.03	$2,502	8,287
2026-09-05	Peters Todd Kenneth	Vice President, Engineering	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	40	$50.03	$2,001	8,258
2026-09-05	Luu Michael B	Sr. VP Corp Svcs & Chief Risk	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	68	$50.03	$3,402	23,743
2026-09-05	KROPELNICKI MARTIN A	Chairman President & CEO	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	493	$50.03	$24,665	147,286
2026-09-05	Lynch James Patrick	SVP CFO and Treasurer	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	48	$50.03	$2,401	6,485
2026-09-05	Mares Michael S JR	Vice President, Operations	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	67	$50.03	$3,352	8,251
2026-09-05	Mortensen Michelle R	VP Corp Sect & Chief of Staff	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	73	$50.03	$3,652	12,806
2026-09-05	Ouyang Elissa Y	VP Facilities Fleet & Procure	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	66	$50.03	$3,302	14,805
2026-09-05	Scanlon Thomas A	VP, Corporate Controller & CAO	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	30	$50.03	$1,501	5,690
2026-09-05	Jenkins Kenneth G	VP Water Res Plan & Sustain	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	38	$50.03	$1,901	5,125
2026-09-05	Dean Shannon C	SR. VP, Cust Svc & Chief Sust	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	72	$50.03	$3,602	23,612
2026-09-04	James Sophie Marwieh	VP Water Qual & Envir Affairs	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	51	$50.03	$2,552	8,337
2026-09-04	Peters Todd Kenneth	Vice President, Engineering	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	41	$50.03	$2,051	8,298
2026-09-04	Scanlon Thomas A	VP, Corporate Controller & CAO	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	30	$50.03	$1,501	5,720
2026-09-04	Bunting Shawn C	Sr. VP, GC and Business Dev	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	71	$50.03	$3,552	4,642
2026-09-04	HAMNER KRISTAN A	VP, Chief Human Resource Offcr	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	42	$50.03	$2,101	2,979
2026-09-04	KROPELNICKI MARTIN A	Chairman President & CEO	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	505	$50.03	$25,265	147,779
2026-09-04	Jenkins Kenneth G	VP Water Res Plan & Sustain	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	64	$50.03	$3,202	5,163
2026-09-04	Lynch James Patrick	SVP CFO and Treasurer	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	50	$50.03	$2,502	6,533
2026-09-04	Luu Michael B	Sr. VP Corp Svcs & Chief Risk	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	70	$50.03	$3,502	23,811
2026-09-04	Mares Michael S JR	Vice President, Operations	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	69	$50.03	$3,452	8,318
2026-09-04	Mortensen Michelle R	VP Corp Sect & Chief of Staff	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	75	$50.03	$3,752	12,879
2026-09-04	Dean Shannon C	SR. VP, Cust Svc & Chief Sust	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	75	$50.03	$3,752	23,684
2026-09-04	Ouyang Elissa Y	VP Facilities Fleet & Procure	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	68	$50.03	$3,402	14,871
2026-09-01	Snow Lester A	Director	Sell↓ Filing footnotes — Common Stock (Direct) This transaction was a single trade at a price of $50.21.	Common Stock	500	$50.21	$25,105	17,816
2026-08-13	Krummel Thomas M	Director	Sell↓	Common Stock	3,700	$50.37	$186,351	20,103
2026-08-04	Shimansky Gregory Dale	VP, Rates & Reg Affairs	Award↑ Filing footnotes — Common Stock (Direct) Restricted stock granted on 8/4/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3. RSA vests one-third on March 3, 2027 with the remaining 2/3 vesting quarterly over the succeeding 24 months.	Common Stock	446	—	—	1,311
2026-06-05	Peters Todd Kenneth	Vice President, Engineering	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	40	$45.82	$1,833	8,340
2026-06-05	Jenkins Kenneth G	VP Water Res Plan & Sustain	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	38	$45.82	$1,741	5,228
2026-06-05	Lynch James Patrick	SVP CFO and Treasurer	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	49	$45.82	$2,245	6,583
2026-06-05	Bunting Shawn C	Sr. VP, GC and Business Dev	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	69	$45.82	$3,162	4,714
2026-06-05	Scanlon Thomas A	VP, Corporate Controller & CAO	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	30	$45.82	$1,375	5,723
2026-06-05	James Sophie Marwieh	VP Water Qual & Envir Affairs	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	50	$45.82	$2,291	8,321
2026-06-05	KROPELNICKI MARTIN A	Chairman President & CEO	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	493	$45.82	$22,589	148,284
2026-06-05	Mares Michael S JR	Vice President, Operations	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	68	$45.82	$3,116	8,387
2026-06-05	Mortensen Michelle R	VP Corp Sect & Chief of Staff	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	73	$45.82	$3,345	12,953
2026-06-05	Milleman Greg A	VP Rates & Regulatory Affairs	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	66	$45.82	$3,024	13,708
2026-06-05	Luu Michael B	Sr. VP Corp Svcs & Chief Risk	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	69	$45.82	$3,162	23,806
2026-06-05	Dean Shannon C	SR. VP, Cust Svc & Chief Sust	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	73	$45.82	$3,345	23,741
2026-06-05	Ouyang Elissa Y	VP Facilities Fleet & Procure	Tax↓ Filing footnotes — Common Stock (Direct) 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.	Common Stock	66	$45.82	$3,024	14,939
2026-06-04	James Sophie Marwieh	VP Water Qual & Envir Affairs	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	51	$45.24	$2,307	8,371
2026-06-04	Bunting Shawn C	Sr. VP, GC and Business Dev	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	70	$45.24	$3,167	4,783
2026-06-04	Mares Michael S JR	Vice President, Operations	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	69	$45.24	$3,122	8,455
2026-06-04	Lynch James Patrick	SVP CFO and Treasurer	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	49	$45.24	$2,217	6,632
2026-06-04	Dean Shannon C	SR. VP, Cust Svc & Chief Sust	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	74	$45.24	$3,348	23,814
2026-06-04	Peters Todd Kenneth	Vice President, Engineering	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	40	$45.24	$1,810	8,380
2026-06-04	KROPELNICKI MARTIN A	Chairman President & CEO	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	504	$45.24	$22,801	148,777
2026-06-04	Mortensen Michelle R	VP Corp Sect & Chief of Staff	Tax↓ Filing footnotes — Common Stock (Direct) 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	Common Stock	74	$45.24	$3,348	13,026
2026-06-04	Luu Michael B	Sr. VP Corp Svcs & Chief Risk	Tax↓ Filing footnotes — Common Stock (Direct) 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 Includes shares acquired through the Employee Stock Purchase Program (ESPP).	Common Stock	70	$45.24	$3,167	23,875

Legend Buy — open-market purchase Sell — open-market sale ↑ Shares acquired ↓ Shares disposed (gift, conversion, tax…)

Showing 1–50 of 1,167 transactions

Key facts CIK 1035201 CUSIP 130788102 13F (30d) 56 filings 56 filers Visit website Investor relations