California Water Service CWT Insider Ownership

NYSE CWT
$50.14 +0.40 (+0.80%)
At close: Sep 2, 2026 · 4:00 PM EDT

Insider Holdings by Owner

698.72K Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
1.17%
▼-0.0048% pp QoQ
Shares Held by Insiders
698.72K
filed for Sep 2026
▼-0.41% QoQ
Shares Outstanding
59.65Mn
59,653,000 shares
Direct Holdings
695.40K
Indirect: 3.32K
Net Shares Traded (QoQ)
-2.89K
net selling in Sep 2026
Insiders Holding Shares
34
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

California Water Service's three largest insider shareholders as of August 29, 2026 are Martin A Kropelnicki (Chairman President Ceo, 148.83K shares), Martin A Kropelnicki (Chairman President Ceo, 148.28K shares), Richard P Magnuson (Director, 59.73K shares).

Form 4 Holdings

Insiders Holding CWT

Insiders 34
Shares held 698.72K
Of outstanding 1.17%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Martin A Kropelnicki Chairman President Ceo 148,285 0 148,285 21.2% 08 Jun, 2026
2 Richard P Magnuson Director 56,413 3,320 59,733 8.5% 03 Mar, 2022
3 Thomas F Iii Smegal Vp, Cfo Treasurer 46,777 0 46,777 6.7% 05 Jun, 2023
4 Paul G. Townsley Vp, Rates Reg Matters 31,540 0 31,540 4.5% 05 Jun, 2023
5 Lynne P Mcghee Vp, General Counsel 26,981 0 26,981 3.9% 05 Jun, 2023
6 Ronald D Webb Vp, Human Resources 26,580 0 26,580 3.8% 11 Mar, 2025
7 Gregory E Aliff Director 26,395 0 26,395 3.8% 05 Mar, 2026
8 Michael B Luu Svp Corp Svce Chief Risk Of 23,807 0 23,807 3.4% 08 Jun, 2026
9 Shannon C Dean Sr. Vp, Cust Svc Chief Sust 23,742 0 23,742 3.4% 08 Jun, 2026
10 Peter C Nelson Chairman Ceo 20,420 0 20,420 2.9% 09 Mar, 2023
11 Thomas M Krummel Director 20,104 0 20,104 2.9% 13 Aug, 2026
12 Carol M Pottenger Director 19,187 0 19,187 2.7% 05 Mar, 2026
13 Shelly Marian Esque Director 18,331 0 18,331 2.6% 05 Mar, 2026
14 Lester A Snow Director 17,817 0 17,817 2.5% 01 Sep, 2026
15 Terry Bayer Director 16,257 0 16,257 2.3% 03 Mar, 2022
16 Patricia K Wagner Director 15,214 0 15,214 2.2% 05 Mar, 2026
17 Scott L Morris Director 15,209 0 15,209 2.2% 05 Mar, 2026
18 Elissa Y Ouyang Vp Facilities Fleet Procure It 14,939 0 14,939 2.1% 08 Jun, 2026
19 Greg A Milleman Vp Rates Regulatory Affairs 13,708 0 13,708 2.0% 08 Jun, 2026
20 Michelle R Mortensen Vp Corp Sect, Gov Assurance 12,954 0 12,954 1.9% 08 Jun, 2026
21 Robert J Kuta Vp, Engineering 12,805 0 12,805 1.8% 05 Jun, 2023
22 Yvonne Aida Maldonado Director 12,635 0 12,635 1.8% 05 Mar, 2026
23 Kenneth G Jenkins Vp Water Res Plan Sustain 9,118 0 9,118 1.3% 08 Jun, 2026
24 Charles R. Patton Director 9,062 0 9,062 1.3% 05 Mar, 2026
25 Michael S Jr Mares Svp Operations 8,388 0 8,388 1.2% 08 Jun, 2026
26 Jeffrey Kightlinger Director 8,355 0 8,355 1.2% 05 Mar, 2026
27 Todd Kenneth Peters Vice President, Engineering 8,340 0 8,340 1.2% 08 Jun, 2026
28 Sophie Marwieh James Vp Water Qual 8,321 0 8,321 1.2% 08 Jun, 2026
29 James Patrick Lynch Svp Cfo And Treasurer 6,583 0 6,583 0.9% 08 Jun, 2026
30 Thomas A Scanlon Vp, Corporate Controller Pao 5,723 0 5,723 0.8% 08 Jun, 2026
31 Shawn C Bunting Sr. Vp, Gc And Business Dev 4,714 0 4,714 0.7% 08 Jun, 2026
32 Kristan A Hamner Vp, Chief Human Resource Offcr 3,004 0 3,004 0.4% 08 Jun, 2026
33 David B Healey Vp, Ceo And Treasurer 2,381 0 2,381 0.3% 05 Mar, 2024
34 Gregory Dale Shimansky Vp, Rates Reg Affairs 1,311 0 1,311 0.2% 05 Aug, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

10,729 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
01 Sep, 2026 Lester A Snow Director Disposed S 500 $50.21 $25.11K 17,817 Direct
13 Aug, 2026 Thomas M Krummel Director Disposed S 3,700 $50.37 $186.35K 20,104 Direct
04 Aug, 2026 Gregory Dale Shimansky Vp, Rates Reg Affairs Acquired A 446 $0.00 $0 1,311 Direct
04 Jun, 2026 Michael B Luu Svp Corp Svce Chief Risk Of Disposed F 70 $45.24 $3.17K 23,876 Direct
04 Jun, 2026 Michelle R Mortensen Vp Corp Sect, Gov Assurance Disposed F 74 $45.24 $3.35K 13,027 Direct
04 Jun, 2026 Shawn C Bunting Sr. Vp, Gc And Business Dev Disposed F 70 $45.24 $3.17K 4,783 Direct
04 Jun, 2026 Kenneth G Jenkins Vp Water Res Plan Sustain Disposed F 63 $45.24 $2.85K 5,266 Direct
04 Jun, 2026 Greg A Milleman Vp Rates Regulatory Affairs Disposed F 67 $45.24 $3.03K 13,774 Direct
04 Jun, 2026 Kristan A Hamner Vp, Chief Human Resource Offcr Disposed F 41 $45.24 $1.85K 3,004 Direct
04 Jun, 2026 Kenneth G Jenkins Vp Water Res Plan Sustain Disposed F 63 $45.24 $2.85K 5,266 Direct
04 Jun, 2026 Greg A Milleman Vp Rates Regulatory Affairs Disposed F 67 $45.24 $3.03K 13,774 Direct
04 Jun, 2026 Sophie Marwieh James Vp Water Qual Disposed F 51 $45.24 $2.31K 8,371 Direct
04 Jun, 2026 Elissa Y Ouyang Vp Facilities Fleet Procure It Disposed F 67 $45.24 $3.03K 15,005 Direct
04 Jun, 2026 James Patrick Lynch Svp Cfo And Treasurer Disposed F 49 $45.24 $2.22K 6,632 Direct
04 Jun, 2026 Kristan A Hamner Vp, Chief Human Resource Offcr Disposed F 41 $45.24 $1.85K 3,004 Direct
04 Jun, 2026 Elissa Y Ouyang Vp Facilities Fleet Procure It Disposed F 67 $45.24 $3.03K 15,005 Direct
04 Jun, 2026 Shannon C Dean Sr. Vp, Cust Svc Chief Sust Disposed F 74 $45.24 $3.35K 23,815 Direct
04 Jun, 2026 Thomas A Scanlon Vp, Corporate Controller Pao Disposed F 30 $45.24 $1.36K 5,753 Direct
04 Jun, 2026 Michael B Luu Svp Corp Svce Chief Risk Of Disposed F 70 $45.24 $3.17K 23,876 Direct
04 Jun, 2026 Todd Kenneth Peters Vice President, Engineering Disposed F 40 $45.24 $1.81K 8,380 Direct