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 2026-06-29, as of 2026-03-31)
| Class | Listed | Shares outstanding | Held by 13F filers | % of class | Holders | CUSIP |
|---|---|---|---|---|---|---|
| Common stock | CNCK · NASDAQ | 162,983,725 | 909,868 | 0.6% | 17 | N20967118 |
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 (19 of 19 · N20967100)
change vs 2026-03-31| # | Filer | Shares / principal | % of class | Value | Change |
|---|---|---|---|---|---|
| 1 | LMR Partners LLP | 521,260 | — | $120K | — |
| 2 | Linden Advisors LP | 456,286 | — | $104K | — |
| 3 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 200,000 | — | $40K | — |
| 4 | Oasis Management Co Ltd. | 160,430 | — | $356K | — |
| 5 | Calamos Advisors LLC | 100,000 | — | $23K | — |
| 6 | Q Global Advisors, LLC | 89,237 | — | $21K | — |
| 7 | Clear Street Group Inc. | 58,772 | — | $14K | +100 (+0.2%) |
| 8 | WHITEBOX ADVISORS LLC | 50,079 | — | $12K | — |
| 9 | MOORE CAPITAL MANAGEMENT, LP | 50,000 | — | $12K | — |
| 10 | JANE STREET GROUP, LLC | 44,937 | — | $10K | — |
| 11 | ARISTEIA CAPITAL, L.L.C. | 44,882 | — | $10K | NEW |
| 12 | DUPONT CAPITAL MANAGEMENT CORP | 30,000 | — | $7K | — |
| 13 | TPG GP A, LLC | 30,000 | — | $7K | — |
| 14 | Sculptor Capital LP | 29,100 | — | $7K | -600 (-2.0%) |
| 15 | D. E. Shaw & Co., Inc. | 21,831 | — | $4K | — |
| 16 | TENOR CAPITAL MANAGEMENT Co., L.P. | 20,000 | — | $5K | — |
| 17 | Vestcor Inc | 19,999 | — | $5K | — |
| 18 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | 15,302 | — | $3K | -148,825 (-90.7%) |
| 19 | WOLVERINE ASSET MANAGEMENT LLC | 14,004 | — | $3K | -7,375 (-34.5%) |
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 |
|---|---|---|---|---|---|
| KDDI Corporation | SCHEDULE 13D | 2026-06-09 | 2026-06-09 | 28,536,516 | 14.9% |
| MONEX GROUP, INC. | SCHEDULE 13D/A | 2026-05-14 | 2026-05-12 | 136,247,594 | 83.6% |
| Koichiro Wada | SCHEDULE 13G | 2025-02-14 | 2024-12-31 | 9,700,464 | 7.5% |
| BIP GP LLC | SCHEDULE 13G/A | 2025-02-12 | 2024-12-31 | 138,262 | 0.1% |
| WAM GP LLC | SCHEDULE 13G/A | 2025-02-12 | 2024-12-31 | 220,001 | 0.2% |
| WEISS ANDREW M | SCHEDULE 13G/A | 2025-02-12 | 2024-12-31 | 220,001 | 0.2% |
| Weiss Asset Management LP | SCHEDULE 13G/A | 2025-02-12 | 2024-12-31 | 220,001 | 0.2% |
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.