H2O America (HTO) Ownership
HTO ownership summary
as of October 18, 2026- Institutions
- 119.9% of shares outstanding
- Insiders
- 17.59% of shares outstanding
- Shares outstanding
- 41.9M
- Float
- 36.5M shares available to trade
- Short interest
- 6.39% 2.0M shares short
- Days to cover
- 4.31 short interest down 61.0% vs prior month
- Institutions 119.88%
- Insiders 17.59%
HTO top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 16.98% | 7.1M | $410.0M | +688,680 (+10.7%) | June 30, 2026 |
| 2 | ATLAS Infrastructure Partners (UK) Ltd | 11.02% | 4.6M | $266.1M | +79,951 (+1.8%) | June 30, 2026 |
| 3 | Wellington Management Company LLP | 4.77% | 2.0M | $115.1M | +382,268 (+23.7%) | June 30, 2026 |
| 4 | Antipodes Partners Limited | 4.20% | 1.8M | $101.5M | −489,427 (−21.8%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 3.76% | 1.6M | $90.8M | −112,876 (−6.7%) | June 30, 2026 |
| 6 | State Street Corp | 3.71% | 1.6M | $89.7M | +123,532 (+8.6%) | June 30, 2026 |
| 7 | HPM Partners LLC | 3.12% | 1.3M | $75.4M | −2,452 (−0.2%) | June 30, 2026 |
| 8 | Vanguard Portfolio Management, LLC | 3.02% | 1.3M | $72.9M | +94,820 (+8.1%) | June 30, 2026 |
| 9 | Soros Fund Management LLC | 3.00% | 1.3M | $72.4M | +25,621 (+2.1%) | June 30, 2026 |
| 10 | Victory Capital Management Inc. | 2.79% | 1.2M | $67.4M | +256,839 (+28.2%) | June 30, 2026 |
| 11 | Amundi | 2.64% | 1.1M | $63.8M | −51,585 (−4.5%) | June 30, 2026 |
| 12 | Geode Capital Management, LLC | 2.37% | 992K | $57.3M | +95,389 (+10.6%) | June 30, 2026 |
| 13 | Yaupon Capital Management LP | 2.04% | 852K | $49.1M | −43,589 (−4.9%) | June 30, 2026 |
| 14 | Two Sigma Investments LLC | 1.93% | 806K | $46.5M | +556,161 (+222.2%) | June 30, 2026 |
| 15 | Amvescap Plc. | 1.85% | 776K | $44.8M | +75,722 (+10.8%) | June 30, 2026 |
| 16 | Dimensional Fund Advisors, Inc. | 1.71% | 715K | $41.2M | +9,256 (+1.3%) | June 30, 2026 |
| 17 | Kbc Group NV | 1.46% | 610K | $35.2M | +17,003 (+2.9%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 1.41% | 590K | $34.0M | −191,549 (−24.5%) | June 30, 2026 |
| 19 | Legal & General Group PLC | 1.37% | 572K | $33.0M | +28,064 (+5.2%) | June 30, 2026 |
| 20 | Resolution Capital Limited | 1.23% | 516K | $29.8M | +33,335 (+6.9%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 2.5M shares and 6 cut 891K.
HTO top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.18% | 2.2M | $125.1M | +522 (+0.0%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.55% | 1.1M | $61.6M | −2,058 (−0.2%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.19% | 915K | $52.8M | −10,560 (−1.1%) | September 30, 2026 |
| 4 | ATLAS Global Infrastructure USD Unhedged | 1.72% | 719K | $41.5M | — | June 30, 2026 |
| 5 | iShares Global Water ETF USD Dist | 1.41% | 591K | $34.1M | — | September 30, 2026 |
| 6 | Victory Sycamore Small Company Opp R | 1.37% | 575K | $33.2M | +215,000 (+59.7%) | June 30, 2026 |
| 7 | Renaissance Global Infrastructure | 1.25% | 525K | $30.3M | −74,996 (−12.5%) | June 30, 2026 |
| 8 | Barrow Hanley ConsciousGlblValEqS3USDAcc | 1.18% | 492K | $28.4M | — | July 31, 2026 |
| 9 | Fidelity Small Cap Index | 0.93% | 387K | $22.3M | +3,547 (+0.9%) | July 31, 2026 |
| 10 | DWS Invest Global Infras FC | 0.87% | 365K | $21.0M | +141,678 (+63.6%) | August 31, 2026 |
| 11 | First Trust Water ETF | 0.85% | 356K | $20.5M | — | September 30, 2026 |
| 12 | State Street SPDR Port S&P 600 Sm CpETF | 0.80% | 334K | $19.3M | — | September 30, 2026 |
| 13 | iShares Russell 2000 Value ETF | 0.79% | 332K | $19.1M | +502 (+0.2%) | September 30, 2026 |
| 14 | Cohen & Steers Infrastructure | 0.74% | 311K | $17.9M | — | June 30, 2026 |
| 15 | iShares S&P Small-Cap 600 Value ETF | 0.74% | 308K | $17.8M | — | September 30, 2026 |
| 16 | Invesco S&P Global Water ETF | 0.67% | 279K | $16.1M | — | September 30, 2026 |
| 17 | Amundi MSCI Water UCITS ETF Dist | 0.60% | 252K | $14.5M | — | September 29, 2026 |
| 18 | Invesco MSCI World ETF | 0.59% | 247K | $14.3M | +247,237 (0.0%) | December 31, 2025 |
| 19 | Pacific Maple-Brown AbbGlInfGBPIAcc(Unh) | 0.58% | 242K | $14.0M | −13,285 (−5.2%) | July 31, 2026 |
| 20 | Vanguard Utilities ETF | 0.57% | 238K | $13.7M | −28,654 (−10.8%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
HTO insider transactions
latest 2| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-10 | Atlas Holdings Ltd Gip | Buy | $59.06 | 50,385 | $3.0M |
| 2026-04-10 | Atlas Infrastructure Partners | Buy | $59.06 | 50,385 | $3.0M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
HTO shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns HTO
Institutional investors own 119.9% of H2O America's shares and insiders 17.59%. The largest holder is BlackRock Inc with 16.98% of the shares (7.1M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 6 reduced their stake in the latest filings. Short interest is 6.39% of the float, or 4.31 days of average trading volume. The share count rose 76.0% since 2014.
Related: HTO analyst forecast, HTO key metrics, HTO dividend history. See the HTO stock overview for the latest quote and news.
HTO ownership FAQ
Who owns the most H2O America stock?
The largest shareholders of H2O America are BlackRock Inc (16.98%), ATLAS Infrastructure Partners (UK) Ltd (11.02%), Wellington Management Company LLP (4.77%), Antipodes Partners Limited (4.20%), Vanguard Capital Management, LLC (3.76%).
What percentage of H2O America is owned by institutions?
Institutions hold 119.9% of H2O America's shares outstanding; insiders hold 17.59%.
Which funds own H2O America?
The largest fund holders of H2O America are iShares Core S&P Small-Cap ETF (5.18%), Vanguard MStar Total Stk Mkt Idx Invest (2.55%), iShares Russell 2000 ETF (2.19%), ATLAS Global Infrastructure USD Unhedged (1.72%), iShares Global Water ETF USD Dist (1.41%).
What is H2O America's short interest?
2.0M shares of H2O America were sold short, 6.39% of the float; at the average daily volume it would take 4.31 days to cover.
Are insiders buying or selling H2O America?
Of the latest 2 reported insider transactions in H2O America (since April 10, 2026), 2 were purchases and 0 were sales.
How many shares of H2O America are outstanding?
H2O America has 41.9M shares outstanding, of which 36.5M are in the public float.