SEC Form 4 · Updated Daily
CWT
— CALIFORNIA WATER SERVICE GROUP OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| KROPELNICKI MARTIN A | Officer | 147,779.546 | 2026-09-04 | F |
| MAGNUSON RICHARD P | Director | 56,413 | 2022-03-01 | A |
| MCFARLANE CHRISTINE L | Officer | 55,139 | 2013-03-05 | A |
| FOY ROBERT W | Director | 53,187 | 2012-03-06 | P |
| Smegal Thomas F III | Officer | 46,831 | 2023-06-01 | D |
| EKSTROM PAUL G | Officer | 43,678 | 2012-03-06 | P |
| VERA GEORGE A | Director | 41,513.86 | 2018-04-11 | P |
| BREED CALVIN L | Reporting Owner | 39,859 | 2012-08-28 | S |
| FERRARO FRANCIS S | Reporting Owner | 38,808 | 2016-12-03 | F |
| GUILES EDWIN A | Director | 33,710.19 | 2019-03-05 | A |
| Townsley Paul G. | Officer | 31,540 | 2023-06-03 | D |
| Rossi Michael J | Officer | 31,066 | 2016-12-03 | F |
| MEIER LINDA R | Director | 30,465 | 2016-03-01 | A |
| GUZZETTA ROBERT | Reporting Owner | 30,016 | 2014-11-17 | S |
| HILL BONNIE GUITON | Director | 27,813 | 2017-02-28 | A |
| McGhee Lynne P | Officer | 27,039.36 | 2023-06-01 | D |
| Webb Ronald D | Officer | 26,580.31 | 2025-03-07 | F |
| Aliff Gregory E | Director | 26,395.49 | 2026-03-03 | A |
| BROWN DOUGLAS M | Director | 24,341 | 2013-03-05 | A |
| Luu Michael B | Officer | 23,811.547 | 2026-09-04 | F |
| Dean Shannon C | Officer | 23,684.681 | 2026-09-04 | F |
| NELSON PETER C | Director | 20,420 | 2023-03-07 | A |
| Krummel Thomas M | Director | 20,103.922 | 2026-08-13 | S |
| Pottenger Carol M | Director | 19,186.8 | 2026-03-03 | A |
| Esque Shelly Marian | Director | 18,331 | 2026-03-03 | A |
| Snow Lester A | Director | 17,816.922 | 2026-09-01 | S |
| BAYER TERRY | Director | 16,257 | 2022-03-01 | A |
| Wagner Patricia K | Director | 15,213.8 | 2026-03-03 | A |
| MORRIS SCOTT L | Director | 15,209.23 | 2026-03-03 | A |
| Treloar Timothy D | Officer | 14,907.14 | 2019-12-06 | F |
| Ouyang Elissa Y | Officer | 14,871.45 | 2026-09-04 | F |
| Milleman Greg A | Officer | 13,774.22 | 2026-06-04 | F |
| Mortensen Michelle R | Officer | 12,879.564 | 2026-09-04 | F |
| Kuta Robert J | Officer | 12,861.47 | 2023-06-01 | D |
| Maldonado Yvonne Aida | Director | 12,634.69 | 2026-03-03 | A |
| KARRAKER DAVID R | Officer | 10,435 | 2013-03-05 | A |
| DEL GROSSO HELEN R | Officer | 9,844 | 2014-03-04 | A |
| Patton Charles R. | Director | 9,062.27 | 2026-03-03 | A |
| Kightlinger Jeffrey | Director | 8,354.7 | 2026-03-03 | A |
| James Sophie Marwieh | Officer | 8,337.401 | 2026-09-04 | F |
| Mares Michael S JR | Officer | 8,318.915 | 2026-09-04 | F |
| Peters Todd Kenneth | Officer | 8,298.929 | 2026-09-04 | F |
| Simon Gerald A | Officer | 6,620.46 | 2021-06-05 | F |
| Lynch James Patrick | Officer | 6,533.53 | 2026-09-04 | F |
| Scanlon Thomas A | Officer | 5,720.277 | 2026-09-04 | F |
| HARRIS EDWARD D JR | Director | 5,679 | 2010-03-02 | P |
| Jenkins Kenneth G | Officer | 5,163.854 | 2026-09-04 | F |
| Bunting Shawn C | Officer | 4,642.731 | 2026-09-04 | F |
| Healey David B | Officer | 3,152.87 | 2024-03-02 | A |
| KENNEDY DAVID N | Director | 3,075 | 2007-03-06 | A |
| HAMNER KRISTAN A | Officer | 2,979.22 | 2026-09-04 | F |
| Shimansky Gregory Dale | Officer | 1,311.037 | 2026-08-04 | A |
| STOCKTON DAN L | Officer | 325 | 2006-01-04 | A |
| Tootle John S | Officer | 293.37 | 2006-05-09 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-05 | Bunting Shawn C | Tax withholding | 69 | $50.03 | 4,573.731 |
| 2026-09-05 | Dean Shannon C | Tax withholding | 72 | $50.03 | 23,612.681 |
| 2026-09-05 | James Sophie Marwieh | Tax withholding | 50 | $50.03 | 8,287.401 |
| 2026-09-05 | Jenkins Kenneth G | Tax withholding | 38 | $50.03 | 5,125.854 |
| 2026-09-05 | KROPELNICKI MARTIN A | Tax withholding | 493 | $50.03 | 147,286.546 |
| 2026-09-05 | Luu Michael B | Tax withholding | 68 | $50.03 | 23,743.547 |
| 2026-09-05 | Lynch James Patrick | Tax withholding | 48 | $50.03 | 6,485.53 |
| 2026-09-05 | Mares Michael S JR | Tax withholding | 67 | $50.03 | 8,251.915 |
| 2026-09-05 | Mortensen Michelle R | Tax withholding | 73 | $50.03 | 12,806.564 |
| 2026-09-05 | Ouyang Elissa Y | Tax withholding | 66 | $50.03 | 14,805.45 |
| 2026-09-05 | Peters Todd Kenneth | Tax withholding | 40 | $50.03 | 8,258.929 |
| 2026-09-05 | Scanlon Thomas A | Tax withholding | 30 | $50.03 | 5,690.277 |
| 2026-09-04 | Bunting Shawn C | Tax withholding | 71 | $50.03 | 4,642.731 |
| 2026-09-04 | Dean Shannon C | Tax withholding | 75 | $50.03 | 23,684.681 |
| 2026-09-04 | HAMNER KRISTAN A | Tax withholding | 42 | $50.03 | 2,979.22 |
| 2026-09-04 | James Sophie Marwieh | Tax withholding | 51 | $50.03 | 8,337.401 |
| 2026-09-04 | Jenkins Kenneth G | Tax withholding | 64 | $50.03 | 5,163.854 |
| 2026-09-04 | KROPELNICKI MARTIN A | Tax withholding | 505 | $50.03 | 147,779.546 |
| 2026-09-04 | Luu Michael B | Tax withholding | 70 | $50.03 | 23,811.547 |
| 2026-09-04 | Lynch James Patrick | Tax withholding | 50 | $50.03 | 6,533.53 |
| 2026-09-04 | Mares Michael S JR | Tax withholding | 69 | $50.03 | 8,318.915 |
| 2026-09-04 | Mortensen Michelle R | Tax withholding | 75 | $50.03 | 12,879.564 |
| 2026-09-04 | Ouyang Elissa Y | Tax withholding | 68 | $50.03 | 14,871.45 |
| 2026-09-04 | Peters Todd Kenneth | Tax withholding | 41 | $50.03 | 8,298.929 |
| 2026-09-04 | Scanlon Thomas A | Tax withholding | 30 | $50.03 | 5,720.277 |
| 2026-09-01 | Snow Lester A | Open-market sale | 500 | $50.21 | 17,816.922 |
| 2026-08-13 | Krummel Thomas M | Open-market sale | 3,700 | $50.37 | 20,103.922 |
| 2026-08-04 | Shimansky Gregory Dale | Grant / award | 446 | $0.00 | 1,311.037 |
| 2026-07-01 | Shimansky Gregory Dale | — | — | — | 865.04 |
| 2026-06-05 | Bunting Shawn C | Tax withholding | 69 | $45.82 | 4,714 |
| 2026-06-05 | Dean Shannon C | Tax withholding | 73 | $45.82 | 23,741.586 |
| 2026-06-05 | James Sophie Marwieh | Tax withholding | 50 | $45.82 | 8,321.196 |
| 2026-06-05 | Jenkins Kenneth G | Tax withholding | 38 | $45.82 | 5,228 |
| 2026-06-05 | KROPELNICKI MARTIN A | Tax withholding | 493 | $45.82 | 148,284.717 |
| 2026-06-05 | Luu Michael B | Tax withholding | 69 | $45.82 | 23,806.765 |
| 2026-06-05 | Lynch James Patrick | Tax withholding | 49 | $45.82 | 6,583.363 |
| 2026-06-05 | Mares Michael S JR | Tax withholding | 68 | $45.82 | 8,387.6 |
| 2026-06-05 | Milleman Greg A | Tax withholding | 66 | $45.82 | 13,708.22 |
| 2026-06-05 | Mortensen Michelle R | Tax withholding | 73 | $45.82 | 12,953.8 |
| 2026-06-05 | Ouyang Elissa Y | Tax withholding | 66 | $45.82 | 14,939.041 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.