J-Star director discloses 240K-share insider stake

J-Star Holding Co., Ltd. director Lin Ping-Hong has filed an initial ownership report showing direct holdings of 240,000 Class A Ordinary Shares.

Rhea-AI Filing Summary

J-Star Holding Co., Ltd. director Lin Ping-Hong has filed an initial ownership report showing direct holdings of 240,000 Class A Ordinary Shares. This Form 3 serves as a baseline disclosure of his stake as a company insider and does not reflect new share purchases or sales.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider LIN PING-HONG

Role Director

Type	Security	Shares	Price	Value
holding	Class A Ordinary Shares	--	--	--

Holdings After Transaction: Class A Ordinary Shares — 240,000 shares (Direct)

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does J-Star Holding (YMAT) director Lin Ping-Hong report on this Form 3?

Director Lin Ping-Hong reports holding 240,000 Class A Ordinary Shares of J-Star Holding Co., Ltd. This is an initial ownership statement, establishing his direct equity position as an insider rather than reporting a new transaction or change in holdings.

Is the J-Star Holding (YMAT) Form 3 a buy or sell transaction?

The Form 3 is not a buy or sell report; it is an initial disclosure of existing ownership. It shows Lin Ping-Hong directly holds 240,000 Class A Ordinary Shares, with no accompanying purchases, sales, or derivative exercises reported in this filing.

How many J-Star Holding (YMAT) shares does Lin Ping-Hong directly own?

Lin Ping-Hong is listed as directly owning 240,000 Class A Ordinary Shares of J-Star Holding Co., Ltd. This figure represents his reported beneficial ownership following the reporting date and forms the baseline for future updates on his insider holdings.

Does the J-Star Holding (YMAT) Form 3 include any derivative securities?

No derivative securities are listed for Lin Ping-Hong in this Form 3. The filing focuses solely on his direct ownership of 240,000 Class A Ordinary Shares, with no options, warrants, or other derivative positions disclosed in the provided data.

Why is J-Star Holding (YMAT) filing a Form 3 for Lin Ping-Hong?

A Form 3 is required when someone becomes an insider, such as a director, and must disclose their current holdings. This filing records Lin Ping-Hong’s direct ownership of 240,000 Class A Ordinary Shares as the starting point for any future Form 4 or Form 5 updates.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/18/2026 - 09:01 AM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

LIN PING-HONG

(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/ Lin Ping Hong	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)