What does CUSIP G81237128 represent in this 13F holders report?

CUSIP G81237128 is the security identifier for YMAT - J-Star Holding Co., Ltd. - ORD SHS CLASS A used to aggregate holder disclosures.

How many institutions held YMAT - J-Star Holding Co., Ltd. - ORD SHS CLASS A in Q1 2026?

2 institutional investors reported YMAT - J-Star Holding Co., Ltd. - ORD SHS CLASS A for Q1 2026. Use the holders table for investor-level position and value details.

J-Star Holding Co., Ltd. - ORD SHS CLASS A (YMAT)

CUSIP: G81237128

Q1 2026 13F Holders as of 31 Mar 2026

Type / Class: Equity / ORD SHS CLASS A
Total 13F shares: 36,144
Share change: -13,857
Total reported value: $10,160
Price per share: $0.28
Number of holders: 2
Value change: -$13,529
Number of buys: 2
Number of sells: 3

Security key

G81237128

Report period

Q1 2026

Institutions

Top holders

YMAT full security history Ownership snapshot Full 13F holder table Previous quarter: Q4 2025 J-Star Holding Co., Ltd. SEC filings J-Star Holding Co., Ltd. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP G81237128

Previous quarter: Q4 2025

Recent filing periods:

Q1 2026 Q4 2025

Ownership snapshot

Top shareholders of YMAT - J-Star Holding Co., Ltd. - ORD SHS CLASS A (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Lead holder

Chiang Jing-Bin

13D/G signal

—

Evidence rows

Latest as of

18 Mar 2026

3/4/5 13F Highest disclosed value: $117,600 Showing first 8 of 10 holder rows. Open remaining rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Chiang Jing-Bin	3/4/5 Director, Chairman, 10%+ Owner 3/4/5	— class O/S missing	— 6,097,183 shares	—	18 Mar 2026
New Moon Corp	3/4/5 10%+ Owner 3/4/5	— class O/S missing	— 4,888,092 shares	—	18 Mar 2026
Ching-Chou Huang	3/4/5 Director 3/4/5	— class O/S missing	$117,600 240,000 shares	—	18 Mar 2026
Ping-Hong Lin	3/4/5 Director 3/4/5	— class O/S missing	$117,600 240,000 shares	—	18 Mar 2026
Shen-Huei Wang	3/4/5 Director 3/4/5	— class O/S missing	$117,600 240,000 shares	—	18 Mar 2026
Ting-Pang Sung	3/4/5 Director 3/4/5	— class O/S missing	$117,600 240,000 shares	—	18 Mar 2026
Sam van	3/4/5 CEO 3/4/5	— class O/S missing	$83,853 171,129 shares	—	18 Mar 2026
HRT FINANCIAL LP	13F Company 13F	— class O/S missing	$17,000 35,647 shares	—	31 Dec 2025

Show 2 additional holder rows in the full holder list

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
TWO SIGMA SECURITIES, LLC	13F Company 13F	— class O/S missing	$6,354 13,635 shares	—	31 Dec 2025
UBS Group AG	13F Company 13F	— class O/S missing	$335 719 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

36,144

Rows loaded

Investor	Option	Weight %	Change %	Reported value	* Price	Shares	Share Change	Activity	Report Period

* Reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. An asterisk next to the price means the price is likely invalid.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders

Q1 2026 holders

Holder diff

-1

Investor	Q4 2025 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q4 2025 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend