Archimedes Tech SPAC Partners II Co. (ATIIU) is a NASDAQ-listed special purpose acquisition company ("SPAC") that closed its $230 million IPO on February 12, 2025.

On September 22, 2026, the registration statement on Form
S-4 in connection with its previously announced proposed business combination with Forge Nano, Inc., a technology company pioneering domestic battery and semiconductor innovations, was declared effective by the U.S. Securities and Exchange Commission.

UPCOMING: ATII will hold an extraordinary general meeting of the holders of ATII Ordinary Shares (the “extraordinary general meeting”) to consider proposals to approve matters relating to the Business Combination at 10:00 a.m. Eastern Time, on October 16, 2026. The extraordinary general meeting will be a virtual meeting conducted via live webcast. For full details are available in the Definitive Proxy Statement.