H2O America
DE ˙ DB ˙ US7843051043
SecurityDE:76W / H2O America
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership416,111 shares
Latest Disclosed Value $ 24,413,233
Citadel Advisors Llc ownership in 76W / H2O America

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 416,111 shares of H2O America (DE:76W) valued at $24,413,233 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 66,077 shares of H2O America. This represents a change in shares of 529.74% during the quarter.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (76W) in the form of stock options. The firm currently holds call options representing 253,900 of underlying shares valued at $14,896,313 USD and put options representing 502,800 of underlying shares valued at $29,499,276 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

DE:76W / H2O America Historical Put/Call Ratio
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 416,111 350,034 529.74 24,413 654.19 0.0035
2026-02-17 2025-12-31 13F H2O AMERICA COM 784305104 66,077 27,249 70.18 3,237 71.27 0.0005
2025-11-14 2025-09-30 13F H2O AMERICA COM 784305104 38,828 25,652 194.69 1,891 176.32 0.0003
2025-08-14 2025-06-30 13F H2O AMERICA COM 784305104 13,176 -3,923 -22.94 685 -26.84 0.0001
2025-05-15 2025-03-31 13F SJW GROUP COM 784305104 17,099 -7,251 -29.78 935 -21.95 0.0002
2025-02-14 2024-12-31 13F SJW GROUP COM 784305104 24,350 -22,359 -47.87 1,199 -55.86 0.0002
2024-11-14 2024-09-30 13F SJW GROUP COM 784305104 46,709 -83,857 -64.23 2,714 -61.66 0.0005
2024-08-14 2024-06-30 13F SJW GROUP COM 784305104 130,566 96,401 282.16 7,079 266.22 0.0014
2024-05-15 2024-03-31 13F SJW GROUP COM 784305104 34,165 29,993 718.91 1,933 610.66 0.0004
2024-02-14 2023-12-31 13F SJW GROUP COM 784305104 4,172 4,172 273 0.0001
2023-11-14 2023-09-30 13F SJW GROUP COM 784305104 0 -12,944 -100.00 0 -100.00
2023-08-14 2023-06-30 13F SJW GROUP COM 784305104 12,944 12,944 908 0.0002
2023-05-15 2023-03-31 13F SJW GROUP COM 784305104 0 -50,758 -100.00 0 -100.00
2023-02-14 2022-12-31 13F SJW GROUP COM 784305104 50,758 38,626 318.38 4,121 489.56 0.0010
2022-11-14 2022-09-30 13F SJW GROUP COM 784305104 12,132 -34,037 -73.72 699 -75.75 0.0002
2022-08-15 2022-06-30 13F SJW GROUP COM 784305104 46,169 24,783 115.88 2,882 93.68 0.0007
2022-05-16 2022-03-31 13F SJW GROUP COM 784305104 21,386 -28,460 -57.10 1,488 -59.22 0.0003
2022-02-14 2021-12-31 13F SJW GROUP COM 784305104 49,846 49,846 3,649 0.0007
2021-08-16 2021-06-30 13F SJW GROUP COM 784305104 0 -42,899 -100.00 0 -100.00
2021-05-21 2021-03-31 13F/A-1 SJW GROUP COM 784305104 42,899 10,484 32.34 2,702 20.20 0.0007
2021-05-17 2021-03-31 13F SJW GROUP COM 784305104 42,899 10,484 2,702 0.0007
2021-02-16 2020-12-31 13F SJW GROUP COM 784305104 32,415 3,702 12.89 2,248 28.68 0.0006
2020-11-16 2020-09-30 13F SJW GROUP COM 784305104 28,713 -3,699 -11.41 1,747 -13.21 0.0005
2020-08-14 2020-06-30 13F SJW GROUP Cmn 784305104 32,412 -60,549 -65.13 2,013 -62.51 0.0007
2020-05-15 2020-03-31 13F SJW GROUP Cmn 784305104 92,961 49,028 111.60 5,370 72.01 0.0024
2020-02-14 2019-12-31 13F SJW GROUP Cmn 784305104 43,933 -69,301 -61.20 3,122 -59.63 0.0014
2019-11-14 2019-09-30 13F SJW GROUP Cmn 784305104 113,234 -10,907 -8.79 7,733 2.51 0.0036
2019-08-14 2019-06-30 13F SJW GROUP Cmn 784305104 124,141 -34,431 -21.71 7,544 -22.95 0.0035
2019-05-15 2019-03-31 13F SJW GROUP Cmn 784305104 158,572 -51,701 -24.59 9,791 -16.29 0.0049
2019-02-14 2018-12-31 13F SJW GROUP Cmn 784305104 210,273 175,157 498.80 11,696 444.51 0.0064
2018-11-13 2018-09-30 13F SJW GROUP Cmn 784305104 35,116 22,551 179.47 2,148 158.17 0.0010
2018-08-14 2018-06-30 13F/A-1 SJW GROUP Cmn 784305104 12,565 -4,613 -26.85 832 -8.07 0.0004
2018-08-10 2018-06-30 13F SJW GROUP Cmn 784305104 12,565 -4,613 832
2018-05-14 2018-03-31 13F/A-1 SJW GROUP Cmn 784305104 17,178 17,178 905 0.0005
2018-05-11 2018-03-31 13F SJW GROUP Cmn 784305104 17,178 17,178 905
2017-05-12 2017-03-31 13F SJW GROUP Cmn 784305104 0 -12,581 -100.00 0 -100.00
2017-02-10 2016-12-31 13F SJW GROUP Cmn 784305104 12,581 12,581 704 0.0007
2016-11-10 2016-09-30 13F SJW CORP CMN STK Cmn 784305104 0 -14,646 -100.00 0 -100.00
2017-01-31 2016-06-30 13F/A-1 SJW Cmn 784305104 14,646 14,646 0.00 577 0.0006
2016-08-12 2016-06-30 13F SJW CORP CMN STK Cmn 784305104 14,646 577
2017-01-31 2015-12-31 13F/A-1 SJW CORP CMN STK Cmn 784305104 0 -10,409 -100.00 0 -100.00
2015-11-16 2015-09-30 13F SJW CORP CMN STK Cmn 784305104 10,409 -26,973 -72.16 320 -72.10 0.0003
2015-08-14 2015-06-30 13F SJW CORP CMN STK Cmn 784305104 37,382 -33,733 -47.43 1,147 -47.82 0.0010
2015-05-15 2015-03-31 13F SJW CORP CMN STK Cmn 784305104 71,115 32,659 84.93 2,198 77.83 0.0024
2015-02-17 2014-12-31 13F SJW CORP CMN STK Cmn 784305104 38,456 17,573 84.15 1,236 120.32 0.0015
2014-11-14 2014-09-30 13F SJW CORP CMN STK Cmn 784305104 20,883 11,847 131.11 561 128.05 0.0007
2014-08-14 2014-06-30 13F SJW CORP CMN STK Cmn 784305104 9,036 -2,896 -24.27 246 -30.70 0.0003
2014-02-14 2013-12-31 13F SJW CORP CMN STK Cmn 784305104 11,932 11,932 355 0.0005
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F H2O AMERICA COM Call 253,900 2,752.81 14,896 3,316.51 n/a n/a n/a
2026-02-17 2025-12-31 13F H2O AMERICA COM Call 8,900 436 n/a n/a n/a
2025-11-14 2025-09-30 13F H2O AMERICA COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F H2O AMERICA COM Call 114,200 7,513.33 5,935 7,136.59 n/a n/a n/a
2025-05-15 2025-03-31 13F SJW GROUP COM Call 1,500 400.00 82 485.71 n/a n/a n/a
2025-02-14 2024-12-31 13F SJW GROUP COM Call 300 -25.00 15 -39.13 n/a n/a n/a
2024-11-14 2024-09-30 13F SJW GROUP COM Call 400 -71.43 23 -69.33 n/a n/a n/a
2024-08-14 2024-06-30 13F SJW GROUP COM Call 1,400 -46.15 76 -48.98 n/a n/a n/a
2024-05-15 2024-03-31 13F SJW GROUP COM Call 2,600 -10.34 147 -22.22 n/a n/a n/a
2024-02-14 2023-12-31 13F SJW GROUP COM Call 2,900 190 n/a n/a n/a
2023-11-14 2023-09-30 13F SJW GROUP COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-08-14 2023-06-30 13F SJW GROUP COM Call 2,600 182 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F H2O AMERICA COM Put 502,800 4,389.29 29,499 5,283.03 n/a n/a n/a
2026-02-17 2025-12-31 13F H2O AMERICA COM Put 11,200 93.10 549 94.33 n/a n/a n/a
2025-11-14 2025-09-30 13F H2O AMERICA COM Put 5,800 16.00 282 8.88 n/a n/a n/a
2025-08-14 2025-06-30 13F H2O AMERICA COM Put 5,000 150.00 260 137.61 n/a n/a n/a
2025-05-15 2025-03-31 13F SJW GROUP COM Put 2,000 -71.83 109 -68.77 n/a n/a n/a
2025-02-14 2024-12-31 13F SJW GROUP COM Put 7,100 407.14 349 330.86 n/a n/a n/a
2024-11-14 2024-09-30 13F SJW GROUP COM Put 1,400 -73.58 81 -71.78 n/a n/a n/a
2024-08-14 2024-06-30 13F SJW GROUP COM Put 5,300 381.82 287 362.90 n/a n/a n/a
2024-05-15 2024-03-31 13F SJW GROUP COM Put 1,100 -26.67 62 -36.73 n/a n/a n/a
2024-02-14 2023-12-31 13F SJW GROUP COM Put 1,500 98 n/a n/a n/a
2023-11-14 2023-09-30 13F SJW GROUP COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-08-14 2023-06-30 13F SJW GROUP COM Put 1,100 77 n/a n/a n/a
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.