J-Star Holding Co., Ltd. (YMAT) — Institutional Holders, Q2 2026
4 institutional investment managers reported a YMAT position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $35.3K. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
YMAT in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- Tower Research Capital (TRC)New · +13,500 sh+$7.2K
- StoneX GroupNew · +12,218 sh+$6.5K
- XTX Topco LtdAdded · +6,721 sh+$3.6K
- UBS Group AGNew · +5,963 sh+$3.2K
Biggest sellers
- CITADEL ADVISORSSold out · -22,160 sh-$11.8K
YMAT 13F holders ranked 1–4 of 4
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | StoneX Group#1 · 12,218 sh | 12,218 | $13.8K | <0.01% | New |
| 2 | XTX Topco Ltd#2 · 20,705 sh | 20,705 | $11.1K | <0.01% | +48.1% |
| 3 | Tower Research Capital (TRC)#3 · 13,500 sh | 13,500 | $7.2K | <0.01% | New |
| 4 | UBS Group AG#4 · 5,963 sh | 5,963 | $3.2K | 0.00% | New |
Funds that sold out of YMAT in Q2 2026 (1)
Held YMAT at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| CITADEL ADVISORS22,160 sh | 22,160 | $6.2K |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.