H2O America
US ˙ NasdaqGS ˙ US7843051043

SecurityHTO / H2O America
InstitutionFirst Manhattan Co
Latest Disclosed Ownership77,449 shares
Latest Disclosed Value $ 4,543,933
First Manhattan Co reports 9.69% decrease in ownership of HTO / H2O America

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 77,449 shares of H2O America (US:HTO) valued at $4,543,933 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 85,761 shares of H2O America. This represents a change in shares of -9.69% during the quarter. The current value of the position is $4,344,889 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F H2O AMERICA COM 784305104 77,449 -8,312 -9.69 4,544 8.14 0.0126
2026-02-17 2025-12-31 13F H2O AMERICA COM 784305104 85,761 -3,993 -4.45 4,201 -3.89 0.0110
2025-11-14 2025-09-30 13F H2O AMERICA COM 784305104 89,754 -4,184 -4.45 4,371 -10.45 0.0115
2025-08-14 2025-06-30 13F H2O AMERICA COM 784305104 93,938 -6,264 -6.25 4,882 -10.93 0.0138
2025-05-15 2025-03-31 13F SJW GROUP COM 784305104 100,202 -3,075 -2.98 5,480 7.81 0.0160
2025-02-14 2024-12-31 13F SJW GROUP COM 784305104 103,277 -7,977 -7.17 5,083 -21.36 0.0149
2024-11-14 2024-09-30 13F SJW GROUP COM 784305104 111,254 -9,047 -7.52 6,465 -0.89 0.0192
2024-08-15 2024-06-30 13F/A-1 SJW GROUP COM 784305104 120,301 -892 -0.74 6,523 -4.90 0.0209
2024-08-14 2024-06-30 13F SJW GROUP COM 784305104 120,301 -892 6,523 0.0209
2024-05-15 2024-03-31 13F SJW GROUP COM 784305104 121,193 -13,245 -9.85 6,858 -21.94 0.0222
2024-02-13 2023-12-31 13F SJW GROUP COM 784305104 134,438 2,126 1.61 8,786 10.46 0.0305
2023-11-14 2023-09-30 13F SJW GROUP COM 784305104 132,312 -4,066 -2.98 7,953 -16.82 0.0294
2023-08-14 2023-06-30 13F SJW GROUP COM 784305104 136,378 -15,983 -10.49 9,561 -17.57 0.0350
2023-05-15 2023-03-31 13F SJW GROUP COM 784305104 152,361 -28,190 -15.61 11,599 -20.87 0.0445
2023-02-14 2022-12-31 13F SJW GROUP COM 784305104 180,551 -11,335 -5.91 14,659 32.63 0.0537
2022-11-14 2022-09-30 13F SJW GROUP COM 784305104 191,886 -8,315 -4.15 11,052 -11.54 0.0468
2022-08-15 2022-06-30 13F SJW GROUP COM 784305104 200,201 -3,983 -1.95 12,494 -12.06 0.0504
2022-05-16 2022-03-31 13F SJW GROUP COM 784305104 204,184 940 0.46 14,207 -4.50 0.0465
2022-02-14 2021-12-31 13F SJW GROUP COM 784305104 203,244 6,505 3.31 14,877 14.47 0.0490
2021-11-15 2021-09-30 13F SJW GROUP COM 784305104 196,739 -401 -0.20 12,996 4.15 0.0479
2021-08-16 2021-06-30 13F SJW GROUP COM 784305104 197,140 -10,167 -4.90 12,478 -4.44 0.0456
2021-05-14 2021-03-31 13F SJW GROUP COM 784305104 207,307 -27,520 -11.72 13,058 -19.83 0.0563
2021-02-16 2020-12-31 13F SJW GROUP COM 784305104 234,827 -13,322 -5.37 16,287 7.85 0.0779
2020-11-12 2020-09-30 13F SJW GROUP COMMON 784305104 248,149 -1,000 -0.40 15,102 -2.40 0.0778
2020-08-14 2020-06-30 13F SJW GROUP COMMON 784305104 249,149 -825 -0.33 15,474 7.16 0.0894
2020-05-06 2020-03-31 13F SJW GROUP COMMON 784305104 249,974 -2,550 -1.01 14,440 -19.53 0.0936
2020-02-13 2019-12-31 13F SJW GROUP COMMON 784305104 252,524 -8,231 -3.16 17,944 0.78 0.0900
2019-11-13 2019-09-30 13F SJW GROUP COMMON 784305104 260,755 -14,763 -5.36 17,806 6.35 0.0981
2019-08-16 2019-06-30 13F SJW GROUP COMMON 784305104 275,518 -6,059 -2.15 16,743 -3.69 0.0929
2019-04-12 2019-03-31 13F SJW GROUP COMMON 784305104 281,577 -4,120 -1.44 17,384 9.40 0.1004
2019-01-30 2018-12-31 13F SJW GROUP COMMON 784305104 285,697 -3,503 -1.21 15,890 -10.14 0.0989
2018-10-15 2018-09-30 13F SJW GROUP COMMON 784305104 289,200 -8,805 -2.95 17,684 -10.38 0.0942
2018-08-01 2018-06-30 13F SJW GROUP COMMON 784305104 298,005 -1,950 -0.65 19,733 24.81 0.1138
2018-04-20 2018-03-31 13F SJW GROUP COMMON 784305104 299,955 -525 -0.17 15,810 -17.57 0.0900
2018-01-22 2017-12-31 13F SJW GROUP COMMON 784305104 300,480 -10 -0.00 19,179 12.77 0.1051
2017-10-25 2017-09-30 13F SJW GROUP COMMON 784305104 300,490 -2,200 -0.73 17,007 14.25 0.0974
2017-08-10 2017-06-30 13F/A-2 SJW GROUP COMMON 784305104 302,690 49,150 19.39 14,886 21.77 0.0868
2017-08-01 2017-06-30 13F/A-1 SJW GROUP COMMON 784305104 302,690 0 14,886 0.0868
2017-07-28 2017-06-30 13F SJW GROUP COMMON 784305104 302,690 49,150 14,886
2017-04-25 2017-03-31 13F/A-1 SJW GROUP COMMON 784305104 253,540 -7,110 -2.73 12,225 -16.22 0.0726
2017-04-24 2017-03-31 13F SJW COMMON 784305104 262,910 11,483
2017-01-25 2016-12-31 13F SJW GROUP COMMON 784305104 260,650 -2,260 -0.86 14,591 27.07 0.0887
2016-10-20 2016-09-30 13F SJW COMMON 784305104 262,910 -700 -0.27 11,483 10.63 0.0700
2016-07-14 2016-06-30 13F SJW COMMON 784305104 263,610 3,000 1.15 10,380 9.57 0.0638
2016-04-22 2016-03-31 13F SJW COMMON 784305104 260,610 3,750 1.46 9,473 24.40 0.0583
2016-01-20 2015-12-31 13F SJW COMMON 784305104 256,860 13,150 5.40 7,615 1.61 0.0467
2015-10-26 2015-09-30 13F SJW COMMON 784305104 243,710 26,000 11.94 7,494 12.17 0.0482
2015-07-17 2015-06-30 13F SJW COMMON 784305104 217,710 95,090 77.55 6,681 76.28 0.0394
2015-04-30 2015-03-31 13F SJW COMMON 784305104 122,620 0 0.00 3,790 -3.76 0.0218
2015-01-20 2014-12-31 13F SJW COMMON 784305104 122,620 4,500 3.81 3,938 24.11 0.0223
2014-10-23 2014-09-30 13F SJW COMMON 784305104 118,120 2,250 1.94 3,173 0.70 0.0185
2014-08-14 2014-06-30 13F/A-1 SJW COMMON 784305104 115,870 8,320 7.74 3,151 -0.88 0.0200
2014-05-16 2014-03-31 13F SJW COMMON 784305104 107,550 0 0.00 3,179 -0.75 0.0209
2014-02-04 2013-12-31 13F SJW COMMON 784305104 107,550 3,500 3.36 3,203 9.88 0.0212
2013-10-29 2013-09-30 13F SJW COMMON 784305104 104,050 2,000 1.96 2,915 3.52 0.0204
2013-08-13 2013-06-30 13F SJW COMMON 784305104 102,050 102,050 2,816 0.0194
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.