Security Snapshot

CALIFORNIA WATER SERVICE GROUP - Common Stock (CWT) Institutional Ownership

CUSIP: 130788102

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

332

Shares (Excl. Options)

51,258,091

Price

$45.34

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Type / Class
Equity / Common Stock
Symbol
CWT on NYSE
Shares outstanding
59,748,750
Price per share
$44.81
All holders as of 31 Mar 2026
Q1 2026
Total 13F shares
51,258,091
Total reported value
$2,324,118,188
% of total 13F portfolios
0%
Share change
+1,052,226
Value change
+$49,249,977
Number of holders
332
Price from insider filings
$44.81
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Key facts

  • CWT - CALIFORNIA WATER SERVICE GROUP - Common Stock is tracked under CUSIP 130788102.
  • 332 institutions reported positions in Q1 2026.
  • 5 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 328 to 332 between Q4 2025 and Q1 2026.
  • Reported value moved from $2,171,626,575 to $2,324,118,188.

Research use

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 332 institutions filings for Q1 2026.

Open SEC Evidence

Security key

130788102

Latest holder period

Q1 2026

13F holders

332

13D/G owners

5

CIK / CUSIP context first

Open Q1 2026 holders CWT full holder history CALIFORNIA WATER SERVICE GROUP SEC filings CALIFORNIA WATER SERVICE GROUP company facts CALIFORNIA WATER SERVICE GROUP insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Significant Owners of CALIFORNIA WATER SERVICE GROUP - Common Stock (CWT) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BlackRock, Inc. 17% $463,981,230 10,201,874 BlackRock, Inc. 30 Jun 2025
VANGUARD PORTFOLIO MANAGEMENT LLC 7.2% $195,536,367 4,312,668 Vanguard Portfolio Management 31 Mar 2026
Amundi 5.8% $157,384,376 3,470,997 AMUNDI 31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC 5.3% $143,035,640 3,154,734 Vanguard Capital Management 31 Mar 2026
T. Rowe Price Investment Management, Inc. 5% $147,457,710 2,962,783 T. Rowe Price Investment Management, Inc. 31 Dec 2024

As of 31 Mar 2026, 332 institutional investors reported holding 51,258,091 shares of CALIFORNIA WATER SERVICE GROUP - Common Stock (CWT). This represents 86% of the company’s total 59,748,750 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of CALIFORNIA WATER SERVICE GROUP - Common Stock (CWT) together control 71% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 17% 10,308,555 -3.5% 0.01% $467,389,882
VANGUARD PORTFOLIO MANAGEMENT LLC 7.2% 4,289,673 0% 0.01% $194,493,774
Amundi 5.8% 3,470,997 +27% 0.04% $157,420,813
T. Rowe Price Investment Management, Inc. 5.7% 3,418,294 +2.4% 0.11% $154,986,000
STATE STREET CORP 5.2% 3,102,659 +2.4% 0% $140,674,559
VANGUARD CAPITAL MANAGEMENT LLC 4.5% 2,665,225 0% 0% $120,841,302
NUANCE INVESTMENTS, LLC 2.7% 1,603,748 -12% 10% $72,713,945
GEODE CAPITAL MANAGEMENT, LLC 2.5% 1,475,405 +3.8% 0% $66,907,180
FMR LLC 2.3% 1,390,014 -23% 0% $63,023,240
FIRST TRUST ADVISORS LP 2.3% 1,354,165 -1% 0.04% $61,397,834
DIMENSIONAL FUND ADVISORS LP 1.9% 1,158,359 +0.38% 0.01% $52,522,124
MORGAN STANLEY 1.9% 1,118,705 +46% 0% $50,722,161
Invesco Ltd. 1.7% 1,002,232 +5% 0.01% $45,441,200
Legal & General Group Plc 1.3% 777,542 +1.8% 0.01% $35,253,755
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 1.2% 728,456 +2.5% 0.01% $33,028,195
CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC 1.1% 647,515 -10% 0.44% $29,358,330
NORTHERN TRUST CORP 1.1% 637,303 +4.2% 0% $28,895,319
KBC Group NV 0.97% 577,247 +29% 0.07% $26,172,000
Bank of New York Mellon Corp 0.85% 506,702 +0.37% 0% $22,973,865
Nuveen, LLC 0.71% 425,114 -3.4% 0.01% $19,274,668
Triodos Investment Management BV 0.69% 414,000 0% 1.4% $18,770,760
Beck Bode, LLC 0.69% 411,714 +6% 3.2% $18,667,103
VANGUARD FIDUCIARY TRUST CO 0.65% 386,412 0% 0% $17,519,920
VICTORY CAPITAL MANAGEMENT INC 0.54% 321,315 +1.9% 0.01% $14,568,422
RAYMOND JAMES FINANCIAL INC 0.49% 294,518 +4.5% 0% $13,353,449

Institutional Holders of CALIFORNIA WATER SERVICE GROUP - Common Stock (CWT) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 51,258,091 $2,324,118,188 +$49,249,977 $45.34 332
2025 Q4 50,114,917 $2,171,626,575 +$5,081,563 $43.33 328
2025 Q3 50,023,716 $2,295,345,475 -$9,851,434 $45.89 333
2025 Q2 50,260,380 $2,290,559,976 +$15,201,786 $45.48 334
2025 Q1 49,810,902 $2,414,372,624 +$33,123,916 $48.46 327
2024 Q4 49,124,933 $2,225,791,901 +$20,294,849 $45.33 321
2024 Q3 48,399,650 $2,622,962,723 +$4,689,847 $54.22 319
2024 Q2 48,332,900 $2,343,544,583 -$16,103,470 $48.49 297
2024 Q1 48,723,728 $2,263,936,064 +$48,477,990 $46.48 272
2023 Q4 47,651,480 $2,470,549,934 -$5,695,730 $51.87 281
2023 Q3 47,752,010 $2,259,645,943 +$49,071,720 $47.31 267
2023 Q2 47,066,437 $2,431,238,453 +$114,833,367 $51.63 281
2023 Q1 44,812,071 $2,608,514,269 -$8,335,890 $58.20 290
2022 Q4 44,987,923 $2,728,938,881 +$65,884,017 $60.64 287
2022 Q3 43,925,216 $2,315,396,836 -$112,496,583 $52.69 270
2022 Q2 43,772,375 $2,431,379,637 +$95,673,614 $55.55 268
2022 Q1 42,249,000 $2,504,179,592 +$60,590,867 $59.28 296
2021 Q4 41,138,579 $2,954,637,886 +$43,651,689 $71.86 295
2021 Q3 40,565,857 $2,390,595,028 +$61,174,825 $58.93 260
2021 Q2 39,507,756 $2,195,188,494 +$52,122,477 $55.54 245
2021 Q1 38,549,191 $2,170,615,549 +$16,664,207 $56.34 252
2020 Q4 38,225,881 $2,065,498,626 +$65,390,253 $54.03 247
2020 Q3 37,045,144 $1,609,908,658 +$31,052,729 $43.45 239
2020 Q2 36,227,958 $1,728,106,014 +$14,507,641 $47.70 250
2020 Q1 35,980,250 $1,810,468,832 -$63,858,090 $50.32 247
2019 Q4 37,249,542 $1,920,703,878 +$47,514,082 $51.56 260
2019 Q3 36,298,749 $1,921,472,040 -$11,087,526 $52.93 264
2019 Q2 36,536,327 $1,849,804,463 +$34,143,953 $50.63 255
2019 Q1 36,054,446 $1,956,725,713 +$40,924,471 $54.28 252
2018 Q4 35,325,615 $1,683,009,189 +$18,014,611 $47.66 233
2018 Q3 34,844,541 $1,494,538,819 +$8,888,565 $42.90 211
2018 Q2 34,693,505 $1,351,414,423 +$24,940,343 $38.95 209
2018 Q1 34,118,096 $1,270,974,077 +$10,593,137 $37.25 222
2017 Q4 33,766,918 $1,531,281,955 +$14,146,356 $45.35 217
2017 Q3 33,395,977 $1,274,395,622 +$17,375,518 $38.15 187
2017 Q2 32,358,568 $1,186,795,759 -$2,515,430 $36.80 188
2017 Q1 32,898,562 $1,178,720,666 +$179,879,430 $35.85 197
2016 Q4 33,342,518 $1,130,295,033 +$1,444,475 $33.90 201
2016 Q3 33,231,695 $1,065,965,080 -$61,526,346 $32.09 183
2016 Q2 35,374,623 $1,219,734,128 +$38,058,388 $34.93 181
2016 Q1 34,845,155 $925,163,817 +$105,163,257 $26.72 184
2015 Q4 30,950,324 $720,592,640 +$42,366,324 $23.27 168
2015 Q3 29,100,546 $643,733,666 -$16,305,846 $22.12 157
2015 Q2 29,910,134 $680,190,020 +$8,179,338 $22.85 159
2015 Q1 29,507,163 $721,713,190 -$4,204,204 $24.51 154
2014 Q4 28,687,792 $706,351,777 -$22,711,092 $24.61 154
2014 Q3 29,379,345 $659,449,857 -$4,173,806 $22.44 136
2014 Q2 29,555,698 $714,625,076 -$14,827,380 $24.20 133
2014 Q1 28,857,575 $690,579,619 +$28,696,767 $23.94 138
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