# EDGAR Filing Document

**Accession Number:** 0001875016
**File Stem:** 0001493152-26-010937
**Filing Date:** 2026-3
**Character Count:** 4722
**Document Hash:** 2a2db5e90701655cee74803b493793f1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-26-010937.hdr.sgml**: 20260416

**ACCESSION NUMBER**: 0001493152-26-010937

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260318

**FILED AS OF DATE**: 20260318

**DATE AS OF CHANGE**: 20260318

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Chiang Jing-Bin
- **CENTRAL INDEX KEY:** 0002098136

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42767
- **FILM NUMBER:** 26765924

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 7/F-1, NO. 633, SEC. 2, TAIWAN BLVD.
- **STREET 2:** XITUN DISTRICT
- **CITY:** TAICHUNG CITY
- **PROVINCE COUNTRY:** F5
- **ZIP:** 407
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** J-Star Holding Co., Ltd.
- **CENTRAL INDEX KEY:** 0001875016
- **STANDARD INDUSTRIAL CLASSIFICATION:** [3949]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000

**BUSINESS ADDRESS:**
- **STREET 1:** 7/F-1, NO. 633, SEC. 2, TAIWAN BLVD.
- **STREET 2:** XITUN DISTRICT
- **CITY:** TAICHUNG CITY 407
- **STATE:** F4
- **ZIP:** 40759
- **BUSINESS PHONE:** 886 423229900

**MAIL ADDRESS:**
- **STREET 1:** 7/F-1, NO. 633, SEC. 2, TAIWAN BLVD.
- **STREET 2:** XITUN DISTRICT
- **CITY:** TAICHUNG CITY 407
- **STATE:** F4
- **ZIP:** 40759

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Chiang Jing-Bin<br><sub>(Last) (First) (Middle)</sub><br>7/F-1, NO. 633, SEC. 2, TAIWAN BLVD.,<br>XITUN DISTRICT,<br><sub>(Street)</sub><br>TAICHUNG CITY, TAIWAN 407<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>J-Star Holding Co., Ltd. [ YMAT ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-18 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [X] 10% Owner<br>[ ] Officer (give title below)   [X] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Class B Ordinary Shares | 4888092 | I | Refer to Footnote<sup>(1)</sup> |
| Class B Ordinary Shares | 1209091 | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) The registered address of NEW MOON CORPORATION, a British Virgin Islands company, is OMC Chambers, Wickhams Cay 1, Road Town, Tortola, British Virgin Islands. 4,888,092 Class B Ordinary Shares directly held by NEW MOON CORPORATION of which Jing-Bin Chiang is the sole shareholder and holds the voting and dispositive power over the ordinary shares held by such entity.

**Signature:** /s/ Chiang Jing-Bin  
**Date:** 2026-03-18

### Remarks:

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 4 (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.**