J-Star Holding (YMAT) director discloses 240,000 Class A share stake

Rhea-AI Filing Summary

J-Star Holding Co., Ltd. director WANG SHEN-HUEI has filed an initial ownership report, showing direct holdings of 240,000 Class A Ordinary Shares. This Form 3 does not record any new purchase or sale activity; it simply establishes the director’s existing equity position in the company.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

WANG SHEN-HUEI

(Last) (First) (Middle)

7/F-1, NO. 633, SEC. 2, TAIWAN BLVD.,

XITUN DISTRICT,

(Street)

TAICHUNG CITY 407

(City) (State) (Zip)

TAIWAN, PROVINCE OF CHINA

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
J-Star Holding Co., Ltd. [ YMAT ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Ordinary Shares	240,000	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Wang Shen-Huei	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does J-Star Holding (YMAT) director WANG SHEN-HUEI report on this Form 3?

The filing reports that director WANG SHEN-HUEI holds 240,000 Class A Ordinary Shares of J-Star Holding Co., Ltd. It is an initial ownership statement, establishing this equity stake without indicating any recent trade activity or transaction changes.

Is there any buy or sell transaction disclosed for YMAT in this Form 3?

No, this Form 3 does not disclose any buy or sell transaction. It lists 240,000 Class A Ordinary Shares as directly owned, serving as a baseline ownership record rather than documenting a new trade or change in position.

How many J-Star Holding (YMAT) shares does the director directly own?

The director is shown as directly owning 240,000 Class A Ordinary Shares of J-Star Holding Co., Ltd. This figure comes from the post-transaction holdings column and represents the director’s reported equity stake at the time of this Form 3 filing.

Does this YMAT Form 3 include any derivative securities or options?

The filing does not list any derivative securities or options for the director. The derivative section is empty, and only 240,000 Class A Ordinary Shares are reported, indicating no visible option, warrant, or convertible positions in this particular disclosure.

Is the 240,000-share YMAT position held directly or indirectly?

The 240,000 Class A Ordinary Shares are reported as held directly by the director. The ownership code is marked as "D" for direct ownership, with no nature-of-ownership footnote describing any trusts, partnerships, or other indirect holding structures.