J-Star Holding Co., Ltd.

YMAT

Exchange: Nasdaq
Industry: Sporting & Athletic Goods, NEC
SEC CIK: 0001875016

SEC filings (opens in a new tab)

No open-market purchases or sales by J-Star Holding Co., Ltd. insiders were filed in the last 90 days; 4 institutions reported holding it in 13F filings for Q2 2026, worth $35.3K in total; no superinvestor holds it.

Q2 2026 vs. Q1 2026

How the institutions holding J-Star Holding Co., Ltd. changed between Q1 2026 and Q2 2026.

All holders in Q2 2026 All holders in Q1 2026

13F holders of YMAT: Q1 2026 compared with Q2 2026
Measure	Q1 2026	Q2 2026	Change
Holders	2	4	+2
Shares	36.1K	52.4K	+16.2K (+44.9%)
Value	$10.2K	$35.3K	+$25.1K (+247.1%)

New holders (3)

Institutions that held J-Star Holding Co., Ltd. at the end of Q2 2026 but not at the end of Q1 2026.

Institutions new to YMAT in Q2 2026
Institution	Shares	Value	% of portfolio
StoneX Group Inc.	12,218	$13.8K	0.00%
Tower Research Capital LLC (TRC)	13,500	$7.21K	0.00%
UBS Group AG	5,963	$3.18K	0.00%

Sold out (1)

Institutions that held J-Star Holding Co., Ltd. at the end of Q1 2026 and filed for Q2 2026 without it.

Institutions that sold out of YMAT in Q2 2026
Institution	Shares, Q1 2026	Value, Q1 2026
Citadel Advisors LLC	22,160	$6.23K