5 institutions reported holding $35,268 of J-STAR HLDG CO LTD (YMAT) in SEC 13F filings for 2026-06-30. Largest institutional holders: StoneX Group Inc. ($13,823), XTX Topco Ltd ($11,052), Tower Research Capital LLC (TRC) ($7,209), UBS Group AG ($3,184), CITADEL ADVISORS LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | StoneX Group Inc. | $13,823 | 12,218 | New |
| 2 | XTX Topco Ltd | $11,052 | 20,705 | Added |
| 3 | Tower Research Capital LLC (TRC) | $7,209 | 13,500 | New |
| 4 | UBS Group AG | $3,184 | 5,963 | New |
| 5 | CITADEL ADVISORS LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30