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 filed 2026-04-13, as of 2025-12-31)
| Class | Listed | Shares outstanding | Held by 13F filers | % of class | Holders | CUSIP |
|---|---|---|---|---|---|---|
| Common stock | MRT · NYSEAMER | 86,042,726 | 12,574,123 | 14.6% | 16 | 573134103 |
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 (16 of 16 · 573134103)
change vs 2026-03-31| # | Filer | Shares | % of class | Value | Change |
|---|---|---|---|---|---|
| 1 | DLD Asset Management, LP | 7,063,117 | 8.21% | $9.3M | +497,000 (+7.6%) |
| 2 | Gramercy Funds Management LLC | 2,570,413 | 2.99% | $3.4M | +242,385 (+10.4%) |
| 3 | WELLS FARGO & COMPANY/MN | 1,000,000 | 1.16% | $1.3M | — |
| 4 | Arbiter Partners Capital Management LLC | 969,228 | 1.13% | $1.3M | +682,974 (+238.6%) |
| 5 | Luxor Capital Group, LP | 355,990 | 0.41% | $466K | — |
| 6 | Weiss Asset Management LP | 308,905 | 0.36% | $405K | +181,499 (+142.5%) |
| 7 | OSAIC HOLDINGS, INC. | 158,794 | 0.18% | $208K | NEW |
| 8 | BBR PARTNERS, LLC | 35,000 | 0.04% | $46K | — |
| 9 | Curi Capital, LLC | 35,000 | 0.04% | $46K | — |
| 10 | CJM Wealth Advisers, Ltd. | 35,000 | 0.04% | $46K | — |
| 11 | STATE STREET CORP | 31,330 | 0.04% | $41K | -2,296 (-6.8%) |
| 12 | XTX Topco Ltd | 10,244 | 0.01% | $13K | NEW |
| 13 | MORGAN STANLEY | 1,000 | 0.00% | $1K | NEW |
| 14 | SBI Securities Co., Ltd. | 100 | 0.00% | $131 | NEW |
| 15 | Farther Finance Advisors, LLC | 1 | 0.00% | $1 | — |
| 16 | Caitong International Asset Management Co., Ltd | 1 | 0.00% | $1 | NEW |
Exited since 2026-03-31 (4 filers; largest 4 shown)
| RENAISSANCE TECHNOLOGIES LLC | −40,200 |
| CITADEL ADVISORS LLC | −11,288 |
| UBS Group AG | −494 |
| CITIGROUP INC | −1 |
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 |
|---|---|---|---|---|---|
| Cankut Durgun | SCHEDULE 13D/A | 2026-04-24 | 2026-04-22 | 14,716,803 | 17.1% |
| Esra Unluaslan Durgun | SCHEDULE 13D/A | 2026-04-24 | 2026-04-22 | 14,716,803 | 17.1% |
| Oguz Alper Oktem | SCHEDULE 13D/A | 2026-04-24 | 2026-04-22 | 14,275,626 | 16.6% |
| DLD Asset Management, LP | SCHEDULE 13G | 2026-01-02 | 2023-09-30 | 8,160,068 | 9.99% |
| BECO Booster Fund II GP, LLC | SCHEDULE 13D/A | 2025-10-29 | 2025-03-29 | 8,099,981 | 10.3% |
| BECO Booster Fund II, L.P. | SCHEDULE 13D/A | 2025-10-29 | 2025-03-29 | 8,063,869 | 10.3% |
| Dany Farha | SCHEDULE 13D/A | 2025-10-29 | 2025-03-29 | 8,099,981 | 10.3% |
| Sumed Equity Ltd | SCHEDULE 13D/A | 2025-10-29 | 2025-03-29 | 8,063,869 | 10.3% |
| Yousef Hammad | SCHEDULE 13D/A | 2025-10-29 | 2025-03-29 | 8,211,131 | 10.5% |
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.