As of the latest Form 4 filed Jun 8, 2026.
What California Water Service Group insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 120 most recent filings for CWT.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-08 | 2026-06-05 | James Sophie Marwieh VP Water Qual | FTax | −50.00 | $45.82 | $2.29K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Jenkins Kenneth G VP Water Res Plan & Sustain | FTax | −38.00 | $45.82 | $1.74K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Bunting Shawn C Sr. VP, GC and Business Dev | FTax | −69.00 | $45.82 | $3.16K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Peters Todd Kenneth Vice President, Engineering | FTax | −40.00 | $45.82 | $1.83K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Scanlon Thomas A VP, Corporate Controller & PAO | FTax | −30.00 | $45.82 | $1.37K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Mares Michael S JR SVP Operations | FTax | −68.00 | $45.82 | $3.12K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Milleman Greg A VP Rates & Regulatory Affairs | FTax | −66.00 | $45.82 | $3.02K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Ouyang Elissa Y VP Facilities Fleet Procure IT | FTax | −66.00 | $45.82 | $3.02K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Dean Shannon C SR. VP, Cust Svc & Chief Sust | FTax | −73.00 | $45.82 | $3.34K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Mortensen Michelle R VP Corp Sect, Gov & Assurance | FTax | −73.00 | $45.82 | $3.34K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Luu Michael B SVP Corp Svce & Chief Risk Of | FTax | −69.00 | $45.82 | $3.16K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | Lynch James Patrick SVP CFO and Treasurer | FTax | −49.00 | $45.82 | $2.25K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-05 | KROPELNICKI MARTIN A Chairman President & CEO | FTax | −493.00 | $45.82 | $22.6K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | HAMNER KRISTAN A VP, Chief Human Resource Offcr | FTax | −41.00 | $45.24 | $1.85K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | James Sophie Marwieh VP Water Qual | FTax | −51.00 | $45.24 | $2.31K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Jenkins Kenneth G VP Water Res Plan & Sustain | FTax | −63.00 | $45.24 | $2.85K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Bunting Shawn C Sr. VP, GC and Business Dev | FTax | −70.00 | $45.24 | $3.17K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Peters Todd Kenneth Vice President, Engineering | FTax | −40.00 | $45.24 | $1.81K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Scanlon Thomas A VP, Corporate Controller & PAO | FTax | −30.00 | $45.24 | $1.36K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Mares Michael S JR SVP Operations | FTax | −69.00 | $45.24 | $3.12K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Milleman Greg A VP Rates & Regulatory Affairs | FTax | −67.00 | $45.24 | $3.03K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Ouyang Elissa Y VP Facilities Fleet Procure IT | FTax | −67.00 | $45.24 | $3.03K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Dean Shannon C SR. VP, Cust Svc & Chief Sust | FTax | −74.00 | $45.24 | $3.35K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Mortensen Michelle R VP Corp Sect, Gov & Assurance | FTax | −74.00 | $45.24 | $3.35K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Luu Michael B SVP Corp Svce & Chief Risk Of | FTax | −70.00 | $45.24 | $3.17K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | Lynch James Patrick SVP CFO and Treasurer | FTax | −49.00 | $45.24 | $2.22K | No | Form 4 ↗ |
| 2026-06-08 | 2026-06-04 | KROPELNICKI MARTIN A Chairman President & CEO | FTax | −504.00 | $45.24 | $22.8K | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-27 | Snow Lester A Director | SSale | −1.10K | $44.00 | $48.4K | No | Form 4 ↗ |
| 2026-05-21 | 2026-05-21 | Krummel Thomas M Director | SSale | −3.70K | $43.30 | $160K | No | Form 4 ↗ |
| 2026-03-24 | 2026-03-20 | Luu Michael B Sr. VP Corp Svcs & Chief Risk | SSale | −739.85 | $44.53 | $32.9K | No | Form 4 ↗ |
| 2026-03-24 | 2026-03-20 | Mares Michael S JR Vice President, Operations | SSale | −3.89K | $44.00 | $171K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | James Sophie Marwieh VP Water Qual & Envir Affairs | FTax | −27.00 | $45.59 | $1.23K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | James Sophie Marwieh, VP Water Qual & Envir Affairs | FTax | −232.00 | $45.59 | $10.6K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | James Sophie Marwieh, VP Water Qual & Envir Affairs | AAward | +548.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Jenkins Kenneth G VP Water Res Plan & Sustain | FTax | −33.00 | $45.59 | $1.50K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Jenkins Kenneth G, VP Water Res Plan & Sustain | FTax | −281.00 | $45.59 | $12.8K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Jenkins Kenneth G, VP Water Res Plan & Sustain | AAward | +548.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Bunting Shawn C Sr. VP, GC and Business Dev | FTax | −49.00 | $45.59 | $2.23K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Bunting Shawn C, Sr. VP, GC and Business Dev | FTax | −422.00 | $45.59 | $19.2K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Bunting Shawn C, Sr. VP, GC and Business Dev | AAward | +750.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Peters Todd Kenneth Vice President, Engineering | FTax | −34.00 | $45.59 | $1.55K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Peters Todd Kenneth, Vice President, Engineering | FTax | −296.00 | $45.59 | $13.5K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Peters Todd Kenneth, Vice President, Engineering | AAward | +548.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Scanlon Thomas A VP, Corporate Controller & CAO | FTax | −26.00 | $45.59 | $1.19K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Scanlon Thomas A, VP, Corporate Controller & CAO | FTax | −226.00 | $45.59 | $10.3K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Scanlon Thomas A, VP, Corporate Controller & CAO | AAward | +548.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Mares Michael S JR SVP Operations | FTax | −58.00 | $45.59 | $2.64K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Mares Michael S JR, SVP Operations | FTax | −495.00 | $45.59 | $22.6K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Mares Michael S JR, SVP Operations | AAward | +900.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Milleman Greg A VP Rates & Regulatory Affairs | FTax | −57.00 | $45.59 | $2.60K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Milleman Greg A, VP Rates & Regulatory Affairs | FTax | −486.00 | $45.59 | $22.2K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Milleman Greg A, VP Rates & Regulatory Affairs | AAward | +900.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Ouyang Elissa Y VP Facilities Fleet & Procure | FTax | −57.00 | $45.59 | $2.60K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Ouyang Elissa Y, VP Facilities Fleet & Procure | FTax | −488.00 | $45.59 | $22.2K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Ouyang Elissa Y, VP Facilities Fleet & Procure | AAward | +900.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Dean Shannon C SR. VP, Cust Svc & Chief Sust | FTax | −62.00 | $45.59 | $2.83K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Dean Shannon C, SR. VP, Cust Svc & Chief Sust | FTax | −531.00 | $45.59 | $24.2K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Dean Shannon C, SR. VP, Cust Svc & Chief Sust | AAward | +900.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Mortensen Michelle R VP Corp Sect & Chief of Staff | FTax | −63.00 | $45.59 | $2.87K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Mortensen Michelle R, VP Corp Sect & Chief of Staff | FTax | −534.00 | $45.59 | $24.3K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Mortensen Michelle R, VP Corp Sect & Chief of Staff | AAward | +900.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Luu Michael B SVP Corp Svce & Chief Risk Of | FTax | −59.00 | $45.59 | $2.69K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Luu Michael B, SVP Corp Svce & Chief Risk Of | FTax | −115.00 | $45.59 | $5.24K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Luu Michael B, SVP Corp Svce & Chief Risk Of | AAward | +205.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Luu Michael B, SVP Corp Svce & Chief Risk Of | FTax | −504.00 | $45.59 | $23.0K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | Luu Michael B, SVP Corp Svce & Chief Risk Of | AAward | +900.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | KROPELNICKI MARTIN A Chairman President & CEO | FTax | −385.00 | $45.59 | $17.6K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | KROPELNICKI MARTIN A, Chairman President & CEO | FTax | −3.82K | $45.59 | $174K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-07 | KROPELNICKI MARTIN A, Chairman President & CEO | AAward | +6.51K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | James Sophie Marwieh VP Water Qual & Envir Affairs | FTax | −57.00 | $45.78 | $2.61K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Jenkins Kenneth G VP Water Res Plan & Sustain | FTax | −42.00 | $45.78 | $1.92K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Bunting Shawn C Sr. VP, GC and Business Dev | FTax | −76.00 | $45.78 | $3.48K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Peters Todd Kenneth Vice President, Engineering | FTax | −44.00 | $45.78 | $2.01K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Scanlon Thomas A VP, Corporate Controller & CAO | FTax | −34.00 | $45.78 | $1.56K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Mares Michael S JR SVP Operations | FTax | −75.00 | $45.78 | $3.43K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Milleman Greg A VP Rates & Regulatory Affairs | FTax | −73.00 | $45.78 | $3.34K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Ouyang Elissa Y VP Facilities Fleet & Procure | FTax | −74.00 | $45.78 | $3.39K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Dean Shannon C SR. VP, Cust Svc & Chief Sust | FTax | −80.00 | $45.78 | $3.66K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Mortensen Michelle R VP Corp Sect & Chief of Staff | FTax | −80.00 | $45.78 | $3.66K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Luu Michael B SVP Corp Svce & Chief Risk Of | FTax | −76.00 | $45.78 | $3.48K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Lynch James Patrick SVP CFO and Treasurer | FTax | −56.00 | $45.78 | $2.56K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | KROPELNICKI MARTIN A Chairman President & CEO | FTax | −493.00 | $45.78 | $22.6K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | HAMNER KRISTAN A VP, Chief Human Resource Offcr | FTax | −190.00 | $46.99 | $8.93K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | James Sophie Marwieh VP Water Qual & Envir Affairs | FTax | −233.00 | $46.99 | $10.9K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Jenkins Kenneth G VP Water Res Plan & Sustain | FTax | −283.00 | $46.99 | $13.3K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Bunting Shawn C Sr. VP, GC and Business Dev | FTax | −310.00 | $46.99 | $14.6K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Peters Todd Kenneth Vice President, Engineering | FTax | −179.00 | $46.99 | $8.41K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Scanlon Thomas A Corporate Controller & PAO | FTax | −137.00 | $46.99 | $6.44K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Mares Michael S JR SVP Operations | FTax | −303.00 | $46.99 | $14.2K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Milleman Greg A VP Rates & Regulatory Affairs | FTax | −298.00 | $46.99 | $14.0K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Ouyang Elissa Y VP Facilities Fleet & Procure | FTax | −299.00 | $46.99 | $14.1K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Dean Shannon C SR. VP, Cust Svc & Chief Sust | FTax | −325.00 | $46.99 | $15.3K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Mortensen Michelle R VP Corp Sect & Chief of Staff | FTax | −327.00 | $46.99 | $15.4K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Luu Michael B SVP Corp Svce & Chief Risk Of | FTax | −309.00 | $46.99 | $14.5K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Lynch James Patrick SVP CFO and Treasurer | FTax | −226.00 | $46.99 | $10.6K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | KROPELNICKI MARTIN A Chairman President & CEO | FTax | −2.02K | $46.99 | $94.8K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | HAMNER KRISTAN A VP, Chief Human Resource Offcr | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Kightlinger Jeffrey Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | James Sophie Marwieh VP Water Qual & Envir Affairs | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Jenkins Kenneth G VP Water Res Plan & Sustain | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Bunting Shawn C Sr. VP, GC and Business Dev | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Peters Todd Kenneth Vice President, Engineering | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Scanlon Thomas A Corporate Controller & PAO | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Maldonado Yvonne Aida Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Mares Michael S JR SVP Operations | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Milleman Greg A VP Rates & Regulatory Affairs | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Esque Shelly Marian Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Pottenger Carol M Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Ouyang Elissa Y VP Facilities Fleet & Procure | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Wagner Patricia K Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Aliff Gregory E Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Dean Shannon C SR. VP, Cust Svc & Chief Sust | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Mortensen Michelle R VP Corp Sect & Chief of Staff | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Luu Michael B SVP Corp Svce & Chief Risk Of | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Snow Lester A Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Lynch James Patrick SVP CFO and Treasurer | AAward | +1.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Krummel Thomas M Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Patton Charles R. Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | KROPELNICKI MARTIN A Chairman President & CEO | AAward | +10.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | MORRIS SCOTT L Director | AAward | +2.82K | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also CWT’s full analysis or the market-wide insider trading feed. The tabs above jump to CWT’s other SEC data.
Source: SEC Form 4 filings for CWT, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.