California Water Service (CWT)
NYSE: CWT · Water Supply · San Jose, CA · filing with the SEC since 1997
Grade5.0
◀ Past 5.1● Present 4.8▶ Future 5.1
Who owns California Water Service
As filed with the SECHolders of 5% or more
5
Blackrock, Inc. holds 17.1% of Common Stock, as its SCHEDULE 13G/A filed Jul 17, 2025 says.
Directors and officers
25
report now, of 42 people on the record since 0016. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Blackrock, Inc.
SCHEDULE 13G/A · filed Jul 17, 2025 · Common Stock
Vanguard Portfolio Management
SCHEDULE 13G · filed Apr 29, 2026 · Common Stock
Amundi
SCHEDULE 13G/A · filed Oct 26, 2026 · Common Shares, par value $0.01 · 5.83% in Jul 22, 2026
Vanguard Capital Management
SCHEDULE 13G · filed Apr 29, 2026 · Common Stock
T. Rowe Price Investment Management, Inc.
SCHEDULE 13G/A · filed Feb 14, 2025 · COMMON STOCK
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%
What CWT reports owning in othersstakes of 5% or more, and other ties
7 subsidiaries in 1 country, from the list filed with the 10-K filed Feb 27, 2026.
Insider tradesForm 4
10sales
1purchases
0sales on a scheduled plan
7people selling
$1.0Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 9, 2025 to Nov 9, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 9, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window8 of 42 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Krummel Thomas M | director | 3 | $500,000 | 0 | 0 | $0 |
| Mares Michael S Jr | SVP Operations | 1 | $200,000 | 0 | 0 | $0 |
| Pottenger Carol M | director | 1 | $100,000 | 0 | 0 | $0 |
| Snow Lester A | director | 2 | $100,000 | 0 | 0 | $0 |
| Lynch James Patrick | SVP CFO and Treasurer | 0 | $0 | 0 | 1 | $0 |
| Luu Michael B | SVP Corp Svce & Chief Risk Of | 1 | $0 | 0 | 0 | $0 |
| Shimansky Gregory Dale | VP, Rates & Reg Affairs | 1 | $0 | 0 | 0 | $0 |
| Mortensen Michelle R | VP Corp Sect, Gov & Assurance | 1 | $0 | 0 | 0 | $0 |