Institutional HoldersBeta
Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.
Share classes (cover page of the 20-F/A filed 2026-10-06, as of 2025-12-31)
| Class | Listed | Shares outstanding | Held by 13F filers | % of class | Holders | CUSIP |
|---|---|---|---|---|---|---|
| Common stock | HTOO · NASDAQ | 2,288,291 | 21,750 | 1.0% | 10 | G3R25D209 |
Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.
Top holders (10 of 10 · G3R25D209)
change vs 2026-03-31| # | Filer | Shares | % of class | Value | Change |
|---|---|---|---|---|---|
| 1 | CITADEL ADVISORS LLC | 17,682 | 0.77% | $47K | NEW |
| 2 | UBS Group AG | 2,911 | 0.13% | $8K | -814 (-21.9%) |
| 3 | MORGAN STANLEY | 1,015 | 0.04% | $3K | — |
| 4 | SBI Securities Co., Ltd. | 99 | 0.00% | $262 | — |
| 5 | Ameritas Advisory Services, LLC | 15 | 0.00% | $40 | NEW |
| 6 | CREATIVE FINANCIAL DESIGNS INC /ADV | 11 | 0.00% | $29 | — |
| 7 | NATIONAL BANK OF CANADA /FI/ | 7 | 0.00% | $19 | — |
| 8 | ASSETMARK, INC | 6 | 0.00% | $16 | NEW |
| 9 | JONES FINANCIAL COMPANIES LLLP | 3 | 0.00% | $8 | — |
| 10 | GROUP ONE TRADING LLC | 1 | 0.00% | $3 | — |
Exited since 2026-03-31 (1 filers; largest 1 shown)
| ROYAL BANK OF CANADA | −28 |
Large holders from 13D/13G (latest per reporting person, last 2 years)
Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.
| Reporting person | Form | Filed | Event | Shares | % of class |
|---|---|---|---|---|---|
| Bower Four Capital Corp. | SCHEDULE 13G/A | 2026-05-08 | 2026-03-31 | 350,519 | 9.99% |
| Eric Lazer | SCHEDULE 13G/A | 2026-05-08 | 2026-03-31 | 343,709 | 9.99% |
| Gregory Lipschitz | SCHEDULE 13G/A | 2026-05-08 | 2026-03-31 | 350,519 | 9.99% |
| Roxy Capital Corp | SCHEDULE 13G/A | 2026-05-08 | 2026-03-31 | 343,709 | 9.99% |
| Lantern Management Fund GP | SCHEDULE 13G | 2026-02-13 | 2026-01-04 | 1,749,184 | 9.99% |
| Lantern Management Fund LP | SCHEDULE 13G | 2026-02-13 | 2026-01-04 | 1,749,184 | 9.99% |
| Bower Four Capital Corp | SCHEDULE 13G | 2025-12-18 | 2025-12-11 | 139,328 | 6.52% |
| Lipschitz Gregory | SCHEDULE 13G | 2025-12-18 | 2025-12-11 | 139,328 | 6.52% |
| Frederico Figueira de Chaves | SCHEDULE 13D | 2025-12-04 | 2025-11-26 | 418,386 | 17.2% |
| John-Paul Backwell | SCHEDULE 13D | 2025-12-04 | 2025-11-26 | 400,000 | 16.6% |
Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.