X0609 4 2026-10-22 0 0002101833 Forge Nano Holdings, Inc. NANO 0001889093 Landen Ben false C/O FORGE NANO HOLDINGS, INC. 12300 GRANT STREET, SUITE 110 THORNTON CO 80241 1 0 0 0 0 Common Stock, par value $0.0001 per share 2026-10-22 4 A 0 91987 A 91987 D Private Placement Warrants (right to buy) 11.50 2026-10-22 4 A 0 1250 A Common Stock 1250 1250 D Received in exchange for ordinary shares of Archimedes Tech SPAC Partners II Co. ("ATII") in connection with the merger of ATII with and into the Issuer (the "Domestication Merger") as part of the Issuer's business combination (the "Business Combination") pursuant to the Agreement and Plan of Merger dated April 20, 2026, by and among ATII, the Issuer (f/k/a ATII Holdings Inc.), ATII Merger Sub Inc., ATII Merger Sub II, LLC and Forge Nano, Inc. Represents private placement warrants of ATII, each exercisable for one ordinary share at $11.50 per share, that were exchanged in the Domestication Merger for an equal number of warrants of the Issuer, each exercisable for one share of Common Stock at $11.50 per share. /s/ Michael Kleinberg, as Attorney-in-fact for Ben Landen 2026-10-26