California Water Service Group
Operates regulated water and wastewater utilities across five western states.
$50.48
After-hours close0.00 (0.00%)
At close$50.48(+0.78%)
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Breakdown13F · Form 4
Institutions 95.68%59.17M sharesInsiders 0.77%478.4K sharesOther 3.55%2.19M shares
Shares outstanding 61.84M · Float 61.34M · 99.2% free float
Institutions13F, as of Jun 30, 2026
343 holders · 59.17M shares · 52 new positions · 190 increased · 98 reduced · 47 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 10.76M | 17.39% | +446.9K | Aug 7, 2026 |
| Vanguard Portfolio Management LLC | 4.38M | 7.08% | +90.0K | Aug 13, 2026 |
| T. Rowe Price Investment Management, Inc. | 3.52M | 5.69% | +98.8K | Aug 14, 2026 |
| Amundi | 3.49M | 5.64% | +15.9K | Aug 11, 2026 |
| State Street Corp | 3.27M | 5.28% | +164.2K | Aug 7, 2026 |
| Vanguard Capital Management LLC | 2.69M | 4.35% | +25.4K | Aug 13, 2026 |
| Atlas Infrastructure Partners (UK) Ltd. | 1.98M | 3.21% | +1.98Mnew | Aug 14, 2026 |
| Geode Capital Management, LLC | 1.56M | 2.52% | +80.0K | Aug 12, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 17.10% | 10.20M | 13G | Jul 17, 2025 ↗ |
| Vanguard Portfolio Management | 7.23% | 4.31M | 13G | Apr 29, 2026 ↗ |
| Amundi | 5.82% | 3.47M | 13G | Apr 10, 2026 ↗ |
| Vanguard Capital Management | 5.28% | 3.15M | 13G | Apr 29, 2026 ↗ |
| T. Rowe Price Investment Management, Inc. | 5.00% | 2.96M | 13G | Feb 14, 2025 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Martin A. Kropelnicki | officer: Chairman President & CEO | 148.3K | 0.24% | Jun 8, 2026 |
| Ronald D. Webb | officer: VP, Human Resources | 26.6K | 0.04% | Mar 11, 2025 |
| Gregory E. Aliff | director | 26.4K | 0.04% | Mar 5, 2026 |
| Michael B. Luu | officer: SVP Corp Svce & Chief Risk Of | 23.8K | 0.04% | Jun 8, 2026 |
| Shannon C. Dean | officer: SR. VP, Cust Svc & Chief Sust | 23.7K | 0.04% | Jun 8, 2026 |
| Thomas M. Krummel | director | 20.1K | 0.03% | Aug 14, 2026 |
| Carol M. Pottenger | director | 19.2K | 0.03% | Mar 5, 2026 |
| Shelly Marian Esque | director | 18.3K | 0.03% | Mar 5, 2026 |
| Lester A. Snow | director | 18.3K | 0.03% | May 27, 2026 |
| Patricia K. Wagner | director | 15.2K | 0.02% | Mar 5, 2026 |
2 ten-percent owners hold 69.8K shares by Form 4, outside the officers-and-directors figure above · 22 people have not refiled in the last 18 months (582.0K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 13, 2026 | Thomas M. Krummeldirector | Sale | 3,700 | $50.37 | 20,104 |
| May 27, 2026 | Lester A. Snowdirector | Sale | 1,100 | $44.00 | 18,316 |
| May 21, 2026 | Thomas M. Krummeldirector | Sale | 3,700 | $43.30 | 23,805 |
| Mar 20, 2026 | Michael S. JR Maresofficer: Vice President, Operations | Sale | 3,892 | $44.00 | 8,525 |
| Mar 20, 2026 | Michael B. Luuofficer: Sr. VP Corp Svcs & Chief Risk | Sale | 740 | $44.53 | 23,655 |
| Dec 23, 2025 | Michelle R. Mortensenofficer: VP, Corp Sec &Chief of Staff | Sale | 924 | $43.34 | 11,512 |
| Dec 10, 2025 | James Patrick Lynchofficer: SVP CFO and Treasurer | Purchase | 550 | $42.80 | 4,619 |
CongressHouse and Senate disclosures
Not reported.