YMAT 6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2026

Commission File Number: 001-42767

J-Star Holding Co., Ltd.

(Registrant’s Name)

7/F-1, No. 633, Sec. 2, Taiwan Blvd.,

Xitun District, Taichung City 407,

Taiwan (R.O.C.)

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

As previously disclosed in the Current Reports on Form 6-K of J-Star Holding Co., Ltd. (the “Company”) filed with the U.S. Securities and Exchange Commission on December 16, 2025, the Company received a notification letter from the Listing Qualifications staff (the “Staff”) of The Nasdaq Stock Market LLC (“Nasdaq”) on December 12, 2025, notifying the Company that the minimum closing bid price per share for its Class A ordinary shares was below $1.00 for a period of 30 consecutive business days and, as a result, the Company did not meet the minimum bid price requirement as set forth in Nasdaq Listing Rule 5550(a)(2) (the “Bid Price Requirement”). Nasdaq provided the Company with a 180-calendar-day compliance period, or until June 10, 2026, to regain compliance.

On June 12, 2026, the Company received a delist determination from Nasdaq stating that, since the Company had not regained compliance with the Bid Price Requirement by June 10, 2026, the Company’s securities were subject to delisting unless the Company timely requested a hearing before an independent Hearings Panel (the “Panel”). In response to the determination, the Company submitted a hearing request, which stayed any suspension or delisting action at least pending the hearing and the issuance of the Panel decision following the hearing on July 21, 2026.

On July 30, 2026, the Company was formally notified by Nasdaq that the Company had regained compliance with the Bid Price Requirement. The compliance determination further stated that the Company remains subject to a Mandatory Panel Monitor through July 30, 2027. If within the one-year monitor period the Company fails to evidence of compliance of any Listing Rules of Nasdaq (the “Nasdaq Listing Rules”), the Company will not be afforded a grace period otherwise available under the Nasdaq Listing Rules; rather, Staff will issue a delist determination.

On July 31, 2026, the Company issued a press release announcing that it has regained compliance with the Bid Price Requirement. A copy of the press release is attached hereto as Exhibit 99.1.

Exhibits.

The following exhibits are being filed herewith:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 99.1

J-Star Holding Co., Ltd Regains Compliance with Nasdaq Minimum Bid Price Requirement

Taichung City, Taiwan – July 31, 2026 – J-Star Holding Co., Ltd. (Nasdaq: YMAT) (“J-Star” or the “Company”), today announced that it has received a written decision from the Nasdaq Hearings Panel determining that the Company has regained compliance with Nasdaq Listing Rule 5550(a)(2), the minimum bid price requirement for continued listing on The Nasdaq Capital Market.

The Panel’s decision follows a hearing held on July 21, 2026, during which the Company’s management presented its strategic business plan and initiatives designed to support long-term shareholder value creation. On July 28, 2026, Nasdaq’s Listing Qualifications Staff confirmed that the Company had regained compliance after its ordinary shares maintained a closing bid price of at least $1.00 per share for the required 10 consecutive trading sessions. Based on this determination, the Panel concluded that the Company is in compliance with the applicable listing standard.

As a result, J-Star remains listed on The Nasdaq Capital Market under the ticker symbol “YMAT” and is in compliance with all applicable Nasdaq continued listing requirements.

Jonathan Chiang, Founder, Chairman and CEO of J-Star, commented, “We appreciate the Nasdaq Hearings Panel’s thoughtful review and its determination that J-Star has regained compliance with the minimum bid price requirement. During the hearing, we presented our strategic roadmap and the operational milestones we believe will drive long-term growth. With this matter behind us, our management team is fully focused on executing our business plan, including advancing our battery materials initiatives, expanding our manufacturing capabilities, pursuing strategic growth opportunities, and creating long-term value for our shareholders. We remain confident in the strength of our strategy and our ability to build a leading advanced materials company.”

About J-Star

J-Star Holding Co., Ltd. (NASDAQ: YMAT) is a holding company with operations conducted through subsidiaries in Taiwan, Hong Kong, and Samoa with its headquarters in Taiwan. J-Star’s predecessor group was established in 1970, and has accumulated over 50 years of know-how in material composites industry. J-Star develops and commercializes the technology on carbon reinforcement and resin systems. With decades of experience and knowledge in composites and materials, J-Star is able to apply its expertise and technology to design and manufacture a great variety of lightweight, high-performance carbon composite products, ranging from key structural parts of electric bicycles and sports bicycles, rackets, automobile parts to healthcare products. Visit j-starholding.com and ymacorp.com to learn more.

Forward Looking-Statements

Certain statements contained in this press release about future expectations, plans and prospects, as well as any other statements regarding matters that are not historical facts, may constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements relating to the expected trading commencement and closing dates. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including: the uncertainties related to market conditions and other factors discussed in the “Risk Factors” section of the final prospectus filed with the SEC. For these reasons, among others, investors are cautioned not to place undue reliance upon any forward-looking statements in this press release. Any forward-looking statements contained in this press release speak only as of the date hereof, and J-Star specifically disclaims any obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law.

Contact:

Matt Chesler, CFA

FNK IR

646-809-2183

[email protected]