Archimedes Technologies Spac Partners II Co.

ATII·NASDAQ·$11.33Share Price as of 11/2·$335MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/13/26 10-QQ1 ended 03/31/2605/14/26 10-KFY 202503/04/26 10-QQ3 ended 09/30/2511/07/25 10-QQ2 ended 06/30/2508/08/25

Disclosures

8-KCurrent report10/19/26 8-KCurrent report07/14/26 8-KCurrent report06/25/26 8-KCurrent report04/30/26 8-KCurrent report04/22/26

Prospectuses and Registrations

424B4Prospectus02/11/25 S-1/ARegistration statement (amended)02/05/25 S-1/ARegistration statement (amended)02/03/25 S-1/ARegistration statement (amended)01/21/25 S-1/ARegistration statement (amended)11/27/24

Proxies

DEFA14AAdditional proxy materials10/13/26 DEFM14ADefinitive proxy (merger)09/24/26

Ownership

SC 13G/ABeneficial ownership (amended)08/14/26 SC 13G/ABeneficial ownership (amended)02/11/26 SC 13G/ABeneficial ownership (amended)11/07/25 SC 13G/ABeneficial ownership (amended)08/14/25 SC 13GBeneficial ownership08/12/25

Other

25-NSERemoval from listing10/21/26 42542507/27/26 42542504/30/26 42542504/23/26 42542504/22/26