Archimedes Tech SPAC Partners II Co. 10-Q

Item 5. Other Information. None. Item 6. Exhibits. The following exhibits are filed as part of, or incorporated by reference into, this report: No. Description of Exhibit 31.1 ​ Certification of the Principal Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes Oxley Act of 2002. 31.2 ​ Certification of the Principal Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes Oxley Act of 2002. 32.1* ​ Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 32.2* ​ Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 101.CAL XBRL Taxonomy Extension Calculation Linkbase Document 101.SCH XBRL Taxonomy Extension Schema Document 101.DEF XBRL Taxonomy Extension Definition Linkbase Document 101.LAB XBRL Taxonomy Extension Labels Linkbase Document 101.PRE XBRL Taxonomy Extension Presentation Linkbase Document 104 ​ Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) * Furnished herewith 23 Table of Contents 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. Date: May 14, 2025 ARCHIMEDES TECH SPAC PARTNERS II CO. By: /s/ Long Long Name: Long Long Title: Chief Executive Officer (Principal Executive Officer) By: /s/ Daniel L. Sheehan Name: Daniel L. Sheehan Title: Chief Financial Officer (Principal Financial and Accounting Officer) 24