The world's largest lithium-ion battery copper foil supplier by sales volume is now a US-listed company — and the timing is complicated.

Londian Wason New Energy Tech Inc. (NYSE: FOIL) began trading on August 13, 2026, pricing 4.3 million American Depositary Shares at $22.00 and opening at $26.00, an 18.18% jump from the offer price, per the company's August 13 news release on PR Newswire. The session closed with an 11.4% gain. The raise totaled approximately $94.3 million, with underwriters including Cantor Fitzgerald, Huatai Securities (USA), CMB International Capital, US Tiger Securities, Fortune Securities, BOCOM International, and VC Brokerage.

According to Frost & Sullivan data cited in the company's prospectus, Londian Wason held a 7.6% global market share in 2025, supplying approximately 111,985 metric tons of LiB copper foil from six manufacturing facilities with combined designed capacity of about 180,500 metric tons per year.

The customer list reads like a who's who of global battery manufacturing: CATL, BYD, LG Energy Solution, SK On, Samsung SDI, ATL, Panasonic Industrial Materials, and Sunwoda. Londian Wason has supplied LG Energy Solution since 2015, winning LG's Level S Supplier Award in 2024, and has sold PCB-grade foil to Panasonic Industrial Materials for 12 years. Still, the top five customers accounted for 63.6% of 2025 revenue — concentration risk worth watching.

Financially, the 2025 fiscal year showed a company in transition: revenue of RMB 10.942 billion (approximately $1.565 billion), up 24.9% year-over-year, and a swing from a RMB 293 million net loss to a RMB 20.315 million net profit. LiB copper foil generated 90.4% of revenue; PCB-grade foil added 7.9%; and FCCLs, waste copper foil, and anode plates contributed the remaining 1.7%.

Cornerstone investors Harvest Global Capital Investments Limited and Hithium Global Pte. Ltd. participated in the IPO. Net proceeds are earmarked primarily for global production expansion and upgrades, R&D of advanced technologies, and general corporate purposes, per the PR Newswire release.

Chairman and Co-CEO Wang Guanran stated: "As an industry leader, we have consistently driven the evolution of products and solutions in the copper foil industry. With the successful IPO, we look forward to continuing to advance our strategy to scale-up our key product range with our ultra-thin and high tensile performance battery foil product ranges, as well as our VLP, RTF and HVLP copper foil solutions for high-end CCL and PCB customers."

The structural fact that makes this listing unusual: Londian Wason is the only copper foil manufacturer in the world to go public in the United States, against a backdrop of declining Chinese public offerings driven by stricter US auditing requirements and increased Chinese regulatory oversight.

The tariff environment is the most material risk. Copper itself carries a 50% US tariff. Non-EV lithium-ion battery packs from China face a stacked ad valorem duty of 40.9% as of August 2026 — the 3.4% base rate, plus 25% under Section 301, plus a 12.5% Section 301 forced-labor action that took effect July 24, 2026. Combined tariffs on Chinese lithium-ion batteries and components briefly reached nearly 156% in April 2025. A Malaysia manufacturing facility is under construction, which could eventually offer a partial tariff bypass, but execution timing is not disclosed.

Demand fundamentals from China are solid: China's power battery installations reached 410.2 GWh in the first seven months of 2026, up 15.4% year-on-year, with NEV sales hitting 9.007 million units in the same period, up 9.6% year-on-year, per ichongqing.info reporting dated August 27, 2026.

FOIL's IPO raised real capital with a real customer base. The tariff stack on its core export product is equally real. Investors pricing the stock from here will need to watch the Malaysia facility timeline and any Section 301 developments closely.