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 10-Q filed 2026-03-17, as of 2026-03-17)
| Class | Listed | Shares outstanding | Held by 13F filers | % of class | Holders | CUSIP |
|---|---|---|---|---|---|---|
| Common Class A | MSS · NASDAQ | 27,451,517 | 250,163 | 0.9% | 10 | 560667305 |
| Common Class B | not listed | 3,000,000 | — | — |
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 · 560667305)
change vs 2026-03-31| # | Filer | Shares | % of class | Value | Change |
|---|---|---|---|---|---|
| 1 | CITADEL ADVISORS LLC | 56,118 | 0.20% | $39K | NEW |
| 2 | JANE STREET GROUP, LLC | 51,615 | 0.19% | $36K | NEW |
| 3 | HRT FINANCIAL LP | 39,750 | 0.14% | $27K | NEW |
| 4 | XTX Topco Ltd | 37,509 | 0.14% | $26K | NEW |
| 5 | Virtu Financial LLC | 22,302 | 0.08% | $15K | NEW |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 11,842 | 0.04% | $8K | NEW |
| 7 | Tower Research Capital LLC (TRC) | 11,125 | 0.04% | $8K | NEW |
| 8 | BlackRock, Inc. | 10,261 | 0.04% | $7K | NEW |
| 9 | UBS Group AG | 8,512 | 0.03% | $6K | NEW |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 1,129 | 0.00% | $779 | NEW |
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 |
|---|---|---|---|---|---|
| Jane Street Capital, LLC | SCHEDULE 13G | 2026-09-18 | 2026-09-14 | 22,953 | 2.8% |
| Jane Street Global Trading, LLC | SCHEDULE 13G | 2026-09-18 | 2026-09-14 | 19,791 | 2.4% |
| JANE STREET GROUP, LLC | SCHEDULE 13G | 2026-09-18 | 2026-09-14 | 42,744 | 5.3% |
| Amsterdam NYC Fund, LP | SCHEDULE 13G | 2026-04-29 | 2023-06-14 | 168,000 | 5.81% |
| Golden Tree USA, Inc. | SCHEDULE 13G | 2026-04-29 | 2023-06-14 | 1,400,000 | 44.94% |
| John Xu | SCHEDULE 13G | 2026-04-29 | 2023-06-14 | 1,406,740 | 45.16% |
| Stratton Arms Holding, LLC | SCHEDULE 13G | 2026-04-29 | 2023-06-14 | 1,208,000 | 41.78% |
| Antonio Ruiz-Gimenez | SCHEDULE 13G/A | 2025-04-04 | 2025-03-12 | 916,512 | 4.9% |
| ATW Master Fund V, L.P. | SCHEDULE 13G/A | 2025-04-04 | 2025-03-12 | 916,512 | 4.9% |
| ATW Partners Opportunities Management, LLC | SCHEDULE 13G/A | 2025-04-04 | 2025-03-12 | 916,512 | 4.9% |
| JAK Opportunities XV LLC | SCHEDULE 13G/A | 2025-04-04 | 2025-03-12 | 916,512 | 4.9% |
| Kerry Propper | SCHEDULE 13G/A | 2025-04-04 | 2025-03-12 | 916,512 | 4.9% |
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.