California Water Service Group
California Water Service Group (CWT) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CWT · as of Mar 31, 2025
Ownership Breakdown
331
Institutional Holders
▲ 7 vs Q4
$2.45B
Total Inst. Value
▲ $213.60M vs Q4
59.85M
Shares Outstanding
freeFloat 99.20%
50.49M
13F Shares Held
▲ 1.35M vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CWT largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. water supply | 10.98M | 18.45% | 18.45% | $532.21B | May 2, 2025 | ▼ 184.3K |
VANGUARD GROUP INC water supply | 7.38M | 12.41% | 12.41% | $357.80B | May 9, 2025 | ▼ 131.2K |
STATE STREET CORP water supply | 3.26M | 5.48% | 5.48% | $158.15B | May 15, 2025 | ▼ 164.3K |
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. water supply | 3.03M | 5.09% | 5.09% | $146.82B | May 14, 2025 | ▲ 67.0K |
NUANCE INVESTMENTS, LLC water supply | 2.02M | 3.39% | 3.39% | $97.77B | May 13, 2025 | ▲ 527.3K |
AMUNDI water supply | 1.89M | 3.18% | 3.18% | $92.17B | May 15, 2025 | ▼ 18.2K |
FIRST TRUST ADVISORS LP water supply | 1.44M | 2.42% | 2.42% | $69.78B | May 14, 2025 | ▼ 249.9K |
GEODE CAPITAL MANAGEMENT, LLC water supply | 1.40M | 2.36% | 2.36% | $68.00B | May 13, 2025 | ▲ 42.8K |
DIMENSIONAL FUND ADVISORS LP water supply | 1.20M | 2.02% | 2.02% | $58.32B | May 13, 2025 | ▼ 60.3K |
INVESCO LTD. water supply | 985.1K | 1.66% | 1.66% | $47.74B | May 12, 2025 | ▲ 57.0K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
24
Increased
+1.93M shares3
New Positions
first time holders22
Decreased
−1.42M shares0
Sold Out
fully exitedNet shares change (top 50)
+510.8K
+1.93M / −1.42M
Net new holders
+5
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CWT insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
2
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Snow Lester A director | May 27, 2026 | Sale | 1,100 | $44.00 | $48.4K | 18.3K | Form 4 ↗ |
Krummel Thomas M director | May 21, 2026 | Sale | 3,700 | $43.30 | $160.2K | 23.8K | Form 4 ↗ |
Luu Michael B Sr. VP Corp Svcs & Chief Risk | Mar 20, 2026 | Sale | 739.848 | $44.53 | $32.9K | 23.7K | Form 4 ↗ |
Mares Michael S JR Vice President, Operations | Mar 20, 2026 | Sale | 3,892 | $44.00 | $171.2K | 8.5K | Form 4 ↗ |
Scanlon Thomas A VP, Corporate Controller & CAO | Mar 7, 2026 | Award | 548 | — | — | 6.0K | Form 4 ↗ |
Scanlon Thomas A VP, Corporate Controller & CAO | Mar 7, 2026 | Tax Withhold | 226 | $45.59 | $10.3K | 5.8K | Form 4 ↗ |
Scanlon Thomas A VP, Corporate Controller & CAO | Mar 7, 2026 | Tax Withhold | 26 | $45.59 | $1.2K | 5.8K | Form 4 ↗ |
Scanlon Thomas A VP, Corporate Controller & CAO | Mar 5, 2026 | Tax Withhold | 34 | $45.78 | $1.6K | 5.5K | Form 4 ↗ |
Peters Todd Kenneth Vice President, Engineering | Mar 7, 2026 | Award | 548 | — | — | 8.8K | Form 4 ↗ |
Peters Todd Kenneth Vice President, Engineering | Mar 7, 2026 | Tax Withhold | 296 | $45.59 | $13.5K | 8.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
California Water Service Group (CWT) is primarily owned by institutional investors, who hold approximately 84.3% of total shares outstanding. Company insiders own approximately 0.80%, while retail and public investors account for the remaining 14.85%.
The largest institutional shareholder of California Water Service Group is BLACKROCK, INC., holding approximately 10.98 million shares — equal to 18.45% of outstanding shares — as of March 31, 2025.
A total of 331 institutional investors currently hold CWT stock, with a combined institutional value of approximately $2.45 billion as of the most recent 13F filing period.
Frequently asked questions
CWT ownershipCalifornia Water Service Group (CWT) is primarily owned by institutional investors, who hold approximately 84.3% of shares. The largest shareholder is BLACKROCK, INC. with a 18.45% stake. Company insiders hold 0.80%. Data sourced from SEC Form 13F as of March 31, 2025.