New York, June 3, 2026, 07:13 EDT
J-Star Holding Co., Ltd. stock gained in U.S. premarket trading Wednesday, as the Taiwan composites firm outlined more details for its planned $122.5 million solid-state battery facility in Baytown, Texas. Public.com had YMAT at $1.34 at 7:00 a.m. ET, 47.25% above Tuesday’s close at $0.91. Premarket trading generally sees lighter volumes ahead of the Nasdaq session.
Solid-state batteries rely on solid electrolyte instead of a liquid or gel to transfer charge in each cell. Market focus was less on current earnings and more on specific project milestones. J-Star said Tuesday it now has support for its plan thanks to a Taiwan Central Bank authorization for a planned $60 million outbound investment, along with a formal site commitment from the Baytown West Chambers County Economic Development Foundation. CEO and Chairman Jonathan Chiang called these “meaningful progress.” GlobeNewswire
This matters now as the company works to prove the Baytown factory is real and not just a concept. Its application for a U.S. Department of Energy grant is still under review. J-Star said there’s been no decision yet on DOE funding.
Baytown’s letter of intent calls for an 18-month site availability period, at least five acres, a planned 12,000-square-foot ISO-7 Ultra-Dry Room and access to about 4,000 amps of electrical service, the company said Monday. An ISO-7 room is a controlled clean space—dust and moisture are kept out to protect sensitive materials. Chiang said the new details point to work moving “from concept toward execution.” GlobeNewswire
The financing is still being worked out. J-Star said on May 26 that its unit YMA Corporation got approval in Taiwan to start lining up a $60 million U.S.-dollar loan with certain local banks, backing a 100 MWh battery manufacturing line in Texas. The Texas plant will run under YMA(TX) Inc. CEO Chiang said it was an “important milestone” for its U.S. growth plans. GlobeNewswire
J-Star has only traded publicly for a short time but has already seen sharp swings. The company listed on the Nasdaq Capital Market as YMAT, priced at $4 a share in a 1.25 million-share IPO. Its prospectus cautioned that small-float IPOs could be highly volatile and may not reflect the company’s operating results.
J-Star has flagged the risk on the downside, with shareholders set to vote June 8 on a reverse split to lift its share price. The company was out of compliance with Nasdaq’s $1 minimum bid and has a June 10 deadline to get back in line. J-Star also said there’s no guarantee the share price or liquidity will hold after the consolidation. A bank process, a site letter, and a grant application don’t mean the factory is funded.
The competitive impact here isn’t huge, but it’s there. J-Star’s move sends a small composites player into the battery sector, an area already pushed by more prominent names like QuantumScape, which is working on lithium-metal solid-state batteries, and Solid Power, which is building all-solid-state battery cells. Amprius doesn’t make solid-state batteries but sells high-energy batteries for drones and aircraft—one of the markets J-Star is talking up.
Broader markets were quiet. U.S. stock index futures barely moved in early trading, with Nasdaq 100 futures unchanged as of 4:23 a.m. ET, according to Reuters.
J-Star is still mainly a carbon-fiber and advanced composites business, run out of Taiwan with R&D there. Its focus so far has been lightweight composites for sports gear, e-bikes, car parts and health products. The Baytown battery project moves it into a bigger, more capital-heavy market.
Markets will watch if the early bid sticks as regular trading resumes. The next set of key dates is near, with the shareholder vote on June 8 and Nasdaq’s bid-price deadline on June 10. Investors also wait for news on bank picks, DOE review, or final construction terms.
