CALIFORNIA WTR SVC GROUP CWT
COM · Common Stock · CUSIP 130788102 · ISIN US1307881029
- SectorUtilities
- IndustryWater Supply
- HeadquartersSan Jose, CA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($553.1k this quarter). Holder counts are more reliable. Shares outstanding: 61.8m as of 2026-07-20, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $48.65. Options: 1 managers hold calls ($53.5k notional), 1 hold puts ($73.0k).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 282 |
| Q4 2022 | 296 |
| Q1 2023 | 301 |
| Q2 2023 | 287 |
| Q3 2023 | 275 |
| Q4 2023 | 286 |
| Q1 2024 | 275 |
| Q2 2024 | 299 |
| Q3 2024 | 325 |
| Q4 2024 | 324 |
| Q1 2025 | 331 |
| Q2 2025 | 339 |
| Q3 2025 | 337 |
| Q4 2025 | 330 |
| Q1 2026 | 339 |
| Q2 2026 | 344 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 152 | 133 |
| Q4 2024 | 154 | 139 |
| Q1 2025 | 161 | 137 |
| Q2 2025 | 160 | 147 |
| Q3 2025 | 156 | 139 |
| Q4 2025 | 124 | 167 |
| Q1 2026 | 179 | 121 |
| Q2 2026 | 183 | 140 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $3.6m | $234.0k | 0.06 |
| Q4 2025 | $3.2m | $8.7k | 0.00 |
| Q1 2026 | $31.7k | $81.6k | 2.57 |
| Q2 2026 | $53.5k | $73.0k | 1.36 |
Biggest buyers
| ATLAS Infrastructure Partners (UK) Ltd. | New | +2.0m |
| ANTIPODES PARTNERS Ltd | New | +753.4k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | New | +747.2k |
| AQR CAPITAL MANAGEMENT LLC | Added | +512.1k |
| BlackRock, Inc. | Added | +446.9k |
| STATE STREET CORP | Added | +164.2k |
| CITADEL ADVISORS LLC | Added | +161.7k |
| PANAGORA ASSET MANAGEMENT INC | New | +153.0k |
| D. E. Shaw & Co., Inc. | Added | +109.7k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +107.5k |
Biggest sellers
| CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC | Sold out | -647.5k |
| NUANCE INVESTMENTS, LLC | Reduced | -507.7k |
| MARSHALL WACE, LLP | Sold out | -256.8k |
| Qube Research & Technologies Ltd | Sold out | -186.9k |
| MORGAN STANLEY | Reduced | -170.6k |
| Nuveen, LLC | Reduced | -150.7k |
| JANE STREET GROUP, LLC | Sold out | -123.3k |
| FMR LLC | Reduced | -108.6k |
| GOLDMAN SACHS GROUP INC | Reduced | -86.9k |
| TWO SIGMA INVESTMENTS, LP | Reduced | -68.4k |
Biggest calls
| SIMPLEX TRADING, LLC | Added | $53.5k1.1k shares |
Biggest puts
| SIMPLEX TRADING, LLC | Reduced | $73.0k1.5k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-07-17 | 17.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 7.2% |
| Amundi 13G · institution -0.5 pts · filed 2026-10-26 | 5.3% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.3% |
| T. Rowe Price Investment Management, Inc. 13G · institution filed 2025-02-14 | 5.0% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 1 | $50.7k | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 1 | $55.8k | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 1 | $23.5k | 1 | $40.0k | — |
| Q1 2026 | 0 | — | 2 | $204.2k | — |
| Q2 2026 | 0 | — | 2 | $208.6k | — |
| Q3 2026 | 0 | — | 2 | $211.5k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-01 | Snow Lester A Director | Sold | $25.1k500 shares |
| 2026-08-13 | Krummel Thomas M Director | Sold | $186.4k3.7k shares |
| 2026-05-27 | Snow Lester A Director | Sold | $48.4k1.1k shares |
| 2026-05-21 | Krummel Thomas M Director | Sold | $160.2k3.7k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 10.8m $523.3m | Added +446.9k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 4.4m $213.1m | Added +90.0k |
| T. Rowe Price Investment Management, Inc. 0.11% of their portfolio | 3.5m $171.1m | Added +98.8k |
| Amundi 0.04% of their portfolio | 3.5m $169.7m | Added +15.9k |
| STATE STREET CORP 0.00% of their portfolio | 3.3m $158.9m | Added +164.2k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 2.7m $130.9m | Added +25.4k |
| ATLAS Infrastructure Partners (UK) Ltd. 2.93% of their portfolio | 2.0m $96.6m | New |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.6m $75.7m | Added +80.0k |
| FIRST TRUST ADVISORS LP 0.04% of their portfolio | 1.3m $63.2m | Reduced -54.1k |
| FMR LLC 0.00% of their portfolio | 1.3m $62.3m | Reduced -108.6k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 1.2m $57.2m | Added +16.6k |
| NUANCE INVESTMENTS, LLC 9.07% of their portfolio | 1.1m $53.3m | Reduced -507.7k |
| Invesco Ltd. 0.00% of their portfolio | 974.8k $47.4m | Reduced -27.5k |
| MORGAN STANLEY 0.00% of their portfolio | 948.1k $46.1m | Reduced -170.6k |
| Legal & General Group Plc 0.01% of their portfolio | 807.5k $39.3m | Added +30.0k |
| ANTIPODES PARTNERS Ltd 0.67% of their portfolio | 753.4k $36.7m | New |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.05% of their portfolio | 747.2k $36.4m | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 725.3k $35.3m | Reduced -3.2k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 708.8k $34.5m | Added +71.5k |
| AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 681.8k $33.2m | Added +512.1k |
| KBC Group NV 0.06% of their portfolio | 577.2k $28.1m | Unchanged |
| Bank of New York Mellon Corp 0.00% of their portfolio | 527.1k $25.6m | Added +20.4k |
| Triodos Investment Management BV 1.46% of their portfolio | 493.0k $24.0m | Added +79.0k |
| Beck Bode, LLC 3.14% of their portfolio | 426.7k $20.8m | Added +15.0k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 397.6k $19.3m | Added +11.2k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 365.5k $17.8m | Added +107.5k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 331.1k $16.1m | Added +9.8k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 289.3k $14.1m | Reduced -333 |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 283.6k $13.8m | Reduced -10.9k |
| Nuveen, LLC 0.00% of their portfolio | 274.4k $13.4m | Reduced -150.7k |
| AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio | 245.0k $11.9m | Reduced -16.2k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 244.4k $11.9m | Added +9.7k |
| Public Sector Pension Investment Board 0.03% of their portfolio | 205.6k $10.0m | Reduced -7.5k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 197.1k $9.6m | Reduced -86.9k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 196.4k $9.6m | Added +161.7k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 192.5k $9.4m | Added +109.7k |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO 0.08% of their portfolio | 183.2k $8.9m | Added +98.1k |
| UBS Group AG 0.00% of their portfolio | 172.7k $8.4m | Reduced -13.2k |
| ProShare Advisors LLC 0.01% of their portfolio | 162.7k $7.9m | Added +10.7k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 158.3k $7.7m | Reduced -16.1k |
| FEDERATED HERMES, INC. 0.01% of their portfolio | 155.1k $7.5m | Added +25.9k |
| PANAGORA ASSET MANAGEMENT INC 0.02% of their portfolio | 153.0k $7.4m | New |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 144.2k $7.0m | Added +43.8k |
| GABELLI FUNDS LLC 0.04% of their portfolio | 141.1k $6.9m | Added +97.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 135.5k $6.8m | Reduced -15.6k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 133.8k $6.5m | Added +11.9k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 130.5k $6.3m | Reduced -5.6k |
| Meiji Yasuda Asset Management Co Ltd. 0.27% of their portfolio | 123.5k $6.0m | Reduced -10.6k |
| Mariner, LLC 0.01% of their portfolio | 122.2k $5.9m | Reduced -16.0k |
| Swiss National Bank 0.00% of their portfolio | 119.7k $5.8m | Added +2.2k |
| Trexquant Investment LP 0.04% of their portfolio | 119.5k $5.8m | Added +32.9k |
| MARTINGALE ASSET MANAGEMENT L P 0.13% of their portfolio | 114.7k $5.6m | Added +10.7k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 110.4k $5.4m | Added +49.1k |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 105.3k $5.1m | Added +10.8k |
| CRAWFORD INVESTMENT COUNSEL INC 0.08% of their portfolio | 101.6k $4.9m | Reduced -1.4k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 97.9k $4.8m | Added +14.5k |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.02% of their portfolio | 95.6k $4.7m | Reduced -10.3k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 88.7k $4.3m | Reduced -6.7k |
| Sagefield Capital LP 0.31% of their portfolio | 86.2k $4.2m | New |
| NIA IMPACT ADVISORS, LLC 1.73% of their portfolio | 85.8k $4.2m | Added +49.9k |
| Assenagon Asset Management S.A. 0.00% of their portfolio | 84.7k $4.1m | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 83.5k $4.1m | Added +30.7k |
| WEDGE CAPITAL MANAGEMENT L L P/NC 0.06% of their portfolio | 78.4k $3.8m | Added +33.9k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.01% of their portfolio | 73.4k $3.6m | Added +13.2k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 68.2k $3.3m | Added +644 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 66.8k $3.0m | Added +989 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 65.9k $3.2m | Added +9.7k |
| Maryland State Retirement & Pension System 0.05% of their portfolio | 64.9k $3.2m | Added +3.1k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 64.0k $3.1m | Added +957 |
| CAPITAL FUND MANAGEMENT S.A. 0.02% of their portfolio | 63.8k $3.1m | Added +26.4k |
| IEQ CAPITAL, LLC 0.01% of their portfolio | 63.3k $3.1m | New |
| XTX Topco Ltd 0.04% of their portfolio | 62.6k $3.0m | Added +43.3k |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 62.3k $3.0m | Added +705 |
| Magellan Asset Management Ltd 0.07% of their portfolio | 61.4k $3.0m | Unchanged |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.01% of their portfolio | 60.0k $2.9m | Reduced -6.5k |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 59.9k $2.9m | Reduced -472 |
| Allianz Asset Management GmbH 0.00% of their portfolio | 58.9k $2.7m | Added +84 |
| NORDEA INVESTMENT MANAGEMENT AB 0.00% of their portfolio | 55.9k $2.7m | New |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 55.7k $2.7m | Unchanged |
| TD Asset Management Inc 0.00% of their portfolio | 55.2k $2.7m | Reduced -2.8k |
| KORNITZER CAPITAL MANAGEMENT INC /KS 0.06% of their portfolio | 55.0k $2.7m | Added +12.5k |
| EXCHANGE TRADED CONCEPTS, LLC 0.01% of their portfolio | 54.1k $2.6m | Added +1.3k |
| Midwest Trust Co 0.03% of their portfolio | 52.0k $2.5m | Reduced -831 |
| KENNEDY CAPITAL MANAGEMENT LLC 0.04% of their portfolio | 51.6k $2.5m | Added +19.9k |
| STOREBRAND ASSET MANAGEMENT AS 0.01% of their portfolio | 51.1k $2.5m | Added +1.9k |
| Clear Harbor Asset Management, LLC 0.15% of their portfolio | 49.2k $2.4m | Reduced -100 |
| MACKENZIE FINANCIAL CORP 0.00% of their portfolio | 48.8k $2.4m | Added +7.8k |
| NORTHSTAR ASSET MANAGEMENT INC 0.69% of their portfolio | 48.2k $2.3m | Reduced -11.8k |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 47.9k $2.3m | Added +934 |
| MACQUARIE GROUP LTD 0.01% of their portfolio | 46.6k $2.3m | Reduced -6.8k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 46.1k $2.2m | Reduced -1.1k |
| Vanguard Investments Australia, Ltd. 0.01% of their portfolio | 45.7k $2.2m | Added +1.2k |
| Focus Partners Wealth 0.00% of their portfolio | 45.0k $2.2m | Added +16.8k |
| Ilex Capital Partners (UK) LLP 0.04% of their portfolio | 44.9k $2.2m | New |
| SG Americas Securities, LLC 0.00% of their portfolio | 43.3k $2.1m | Reduced -1.0k |
| CoreCommodity Management, LLC 0.41% of their portfolio | 42.1k $2.1m | Added +13.6k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 41.2k $2.0m | Reduced -11.7k |
| FIFTH THIRD BANCORP 0.00% of their portfolio | 40.4k $2.0m | Added +10.5k |
| Vontobel Holding Ltd. 0.01% of their portfolio | 40.3k $2.0m | Added +144 |
| Cerity Partners LLC 0.00% of their portfolio | 38.0k $1.9m | Added +18.9k |