CWT · Insider Trading
California Water Service
Every open-market purchase and sale reported by CWT officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Form 4 Filings
50
most recent
Open-Market Buys
0
code P
Sales
6
code S
Reporting Insiders
25
current holders
CWT — Recent Form 4 Transactions (latest 2026-09-08)
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-08 | Kenneth G Jenkins | VP Water Res Plan & Sustain | F | −102 | −$5.10K |
| 2026-09-08 | Kristan A Hamner | VP, Chief Human Resource Offcr | F | −42 | −$2.10K |
| 2026-09-08 | Todd Kenneth Peters | Vice President, Engineering | F | −81 | −$4.05K |
| 2026-09-08 | Thomas A Scanlon | VP, Corporate Controller & PAO | F | −60 | −$3.00K |
| 2026-09-08 | Shannon C Dean | SVP, Cust Svc & Chief Sust Of | F | −147 | −$7.35K |
| 2026-09-08 | Michael S Mares JR | SVP Operations | F | −136 | −$6.80K |
| 2026-09-08 | Martin A Kropelnicki | Chairman President & CEO | F | −998 | −$49.93K |
| 2026-09-08 | James Patrick Lynch | SVP CFO and Treasurer | F | −98 | −$4.90K |
| 2026-09-08 | Shawn C Bunting | SVP, Chief Legal Officer & BD | F | −140 | −$7.00K |
| 2026-09-08 | Elissa Y Ouyang | VP Facilities Fleet Procure IT | F | −134 | −$6.70K |
| 2026-09-08 | Michael B Luu | SVP Corp Svce & Chief Risk Of | F | −138 | −$6.90K |
| 2026-09-08 | Michelle R Mortensen | VP Corp Sect, Gov & Assurance | F | −148 | −$7.40K |
| 2026-09-08 | Sophie Marwieh James | VP Water Qual | F | −101 | −$5.05K |
| 2026-09-01 | Lester A Snow | Director | Sell | −500 | −$25.11K |
| 2026-08-14 | Thomas M Krummel | Director | Sell | −3,700 | −$186.35K |
| 2026-08-05 | Gregory Dale Shimansky | VP, Rates & Reg Affairs | A | +446 | — |
| 2026-06-08 | Michael B Luu | SVP Corp Svce & Chief Risk Of | F | −139 | −$6.33K |
| 2026-06-08 | Shawn C Bunting | Sr. VP, GC and Business Dev | F | −139 | −$6.33K |
| 2026-06-08 | Todd Kenneth Peters | Vice President, Engineering | F | −80 | −$3.64K |
| 2026-06-08 | Michelle R Mortensen | VP Corp Sect, Gov & Assurance | F | −147 | −$6.69K |
| 2026-06-08 | Greg A Milleman | VP Rates & Regulatory Affairs | F | −133 | −$6.06K |
| 2026-06-08 | Shannon C Dean | SR. VP, Cust Svc & Chief Sust | F | −147 | −$6.69K |
| 2026-06-08 | Sophie Marwieh James | VP Water Qual | F | −101 | −$4.60K |
| 2026-06-08 | Kenneth G Jenkins | VP Water Res Plan & Sustain | F | −101 | −$4.59K |
| 2026-06-08 | James Patrick Lynch | SVP CFO and Treasurer | F | −98 | −$4.46K |
| 2026-06-08 | Thomas A Scanlon | VP, Corporate Controller & PAO | F | −60 | −$2.73K |
| 2026-06-08 | Martin A Kropelnicki | Chairman President & CEO | F | −997 | −$45.39K |
| 2026-06-08 | Elissa Y Ouyang | VP Facilities Fleet Procure IT | F | −133 | −$6.06K |
| 2026-06-08 | Kristan A Hamner | VP, Chief Human Resource Offcr | F | −41 | −$1.85K |
| 2026-06-08 | Michael S Mares JR | SVP Operations | F | −137 | −$6.24K |
| 2026-05-27 | Lester A Snow | Director | Sell | −1,100 | −$48.40K |
| 2026-05-21 | Thomas M Krummel | Director | Sell | −3,700 | −$160.21K |
| 2026-03-24 | Michael B Luu | Sr. VP Corp Svcs & Chief Risk | Sell | −739 | −$32.95K |
| 2026-03-24 | Michael S Mares JR | Vice President, Operations | Sell | −3,892 | −$171.25K |
| 2026-03-09 | James Patrick Lynch | SVP CFO and Treasurer | F | −56 | −$2.56K |
| 2026-03-09 | Shawn C Bunting | Sr. VP, GC and Business Dev | MIXED | +203 | −$24.95K |
| 2026-03-09 | Greg A Milleman | VP Rates & Regulatory Affairs | MIXED | +284 | −$28.10K |
| 2026-03-09 | Thomas A Scanlon | VP, Corporate Controller & CAO | MIXED | +262 | −$13.05K |
| 2026-03-09 | Michael B Luu | SVP Corp Svce & Chief Risk Of | MIXED | +351 | −$34.39K |
| 2026-03-09 | Shannon C Dean | SR. VP, Cust Svc & Chief Sust | MIXED | +227 | −$30.70K |
| 2026-03-09 | Todd Kenneth Peters | Vice President, Engineering | MIXED | +174 | −$17.06K |
| 2026-03-09 | Kenneth G Jenkins | VP Water Res Plan & Sustain | MIXED | +192 | −$16.24K |
| 2026-03-09 | Michelle R Mortensen | VP Corp Sect & Chief of Staff | MIXED | +223 | −$30.88K |
| 2026-03-09 | Martin A Kropelnicki | Chairman President & CEO | MIXED | +1,812 | −$214.14K |
| 2026-03-09 | Elissa Y Ouyang | VP Facilities Fleet & Procure | MIXED | +281 | −$28.23K |
| 2026-03-09 | Michael S Mares JR | SVP Operations | MIXED | +272 | −$28.64K |
| 2026-03-09 | Sophie Marwieh James | VP Water Qual & Envir Affairs | MIXED | +232 | −$14.42K |
| 2026-03-05 | Patricia K Wagner | Director | A | +2,816 | — |
| 2026-03-05 | Shelly Marian Esque | Director | A | +2,816 | — |
| 2026-03-05 | Thomas M Krummel | Director | A | +2,816 | — |
CWT — Current Insider Holders
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Martin A Kropelnicki | Chairman President & CEO | 147,779 | $7.06M |
| Ronald D Webb | VP, Human Resources | 26,580 | $1.27M |
| Gregory E Aliff | Director | 26,395 | $1.26M |
| Michael B Luu | SVP Corp Svce & Chief Risk Of | 23,811 | $1.14M |
| Shannon C Dean | SVP, Cust Svc & Chief Sust Of | 23,612 | $1.13M |
| Thomas M Krummel | Director | 20,103 | $960.16K |
| Carol M Pottenger | Director | 19,186 | $916.36K |
| Shelly Marian Esque | Director | 18,331 | $875.49K |
| Lester A Snow | Director | 17,816 | $850.94K |
| Patricia K Wagner | Director | 15,213 | $726.61K |
| Scott L Morris | Director | 15,209 | $726.39K |
| Elissa Y Ouyang | VP Facilities Fleet Procure IT | 14,805 | $707.11K |
| Greg A Milleman | VP Rates & Regulatory Affairs | 13,774 | $657.86K |
| Michelle R Mortensen | VP Corp Sect, Gov & Assurance | 12,879 | $615.13K |
| Yvonne Aida Maldonado | Director | 12,634 | $603.43K |
| Charles R. Patton | Director | 9,062 | $432.81K |
| Jeffrey Kightlinger | Director | 8,354 | $399.02K |
| Sophie Marwieh James | VP Water Qual | 8,337 | $398.19K |
| Todd Kenneth Peters | Vice President, Engineering | 8,258 | $394.45K |
| Michael S Mares JR | SVP Operations | 8,251 | $394.11K |
| James Patrick Lynch | SVP CFO and Treasurer | 6,485 | $309.75K |
| Thomas A Scanlon | VP, Corporate Controller & PAO | 5,720 | $273.20K |
| Kenneth G Jenkins | VP Water Res Plan & Sustain | 5,163 | $246.63K |
| Shawn C Bunting | SVP, Chief Legal Officer & BD | 4,573 | $218.44K |
| Kristan A Hamner | VP, Chief Human Resource Offcr | 2,979 | $142.29K |
CWT Insider Trading FAQ
Who are the insiders at CWT?
25 officers, directors and 10%+ beneficial owners currently report holdings in CWT via SEC Form 4.
Are CWT insiders buying or selling?
Across the 50 most recent Form 4 filings for CWT, 0 were open-market purchases (code P) and 6 were sales (code S). Sales frequently reflect scheduled 10b5-1 plans or tax withholding rather than a view on the stock.
How current is CWT insider data?
Form 4 must be filed within two business days of the transaction, so this is close to real time. The most recent CWT filing is dated 2026-09-08.
How to read Form 4 activity
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the CWT quote page; the site-wide leaderboard is on the insider transactions hub.
More on CWT
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.