Every 8-K that Archimedes Tech SPAC Partners III Co. Units (ARCIU) has filed with the SEC in the last 24 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 8-K covers material events a company has to report between its quarterly reports, so if you follow ARCIU and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full ARCIU filings page.
Archimedes Tech SPAC Partners III Co. appointed Stephen N. Cannon as a Class II director on July 13, 2026, effective immediately. The board determined he qualifies as an independent director and assigned him to the audit, compensation, and nominating and corporate governance committees.
Cannon, age 58, has held senior roles at multiple special purpose acquisition companies and is President of Everest Partners Limited. He has no family relationships with current directors or executive officers, and no reportable related party transactions beyond those previously disclosed. In connection with his appointment, he entered into joinder agreements to existing letter and registration rights agreements dated January 22, 2026, and an indemnification agreement similar to those of other officers and directors.
Archimedes Tech SPAC Partners III Co. reported a leadership change. On April 28, 2026, Long Long resigned as Chief Executive Officer, effective immediately, but will remain on the board of directors. The company stated his resignation did not result from any disagreement over operations, policies, or practices.
On the same date, the board appointed Ben Landen as Chief Executive Officer, effective immediately. Landen will also continue serving as Chief Technology Officer. The filing outlines his prior roles with the Archimedes SPAC platform and his background in autonomous vehicle and semiconductor businesses, and notes there are no family relationships, special arrangements, or reportable related party transactions tied to his appointment.
Archimedes Tech SPAC Partners III Co. is allowing investors to trade its ordinary shares and warrants separately from its units. Each unit currently trades on Nasdaq under the symbol ARCIU and consists of one ordinary share and one-fourth of one redeemable warrant.
Beginning on or about March 16, 2026, holders of units sold in the company’s IPO may elect to separate them so that the ordinary shares trade under ARCI and the whole warrants trade under ARCIW. Units that are not separated will continue to trade under ARCIU, and holders must work through their brokers and the transfer agent, Odyssey Transfer and Trust Company, to complete any separation.
Archimedes Tech SPAC Partners III Co. completed its initial public offering of 27,600,000 units at $10.00 each, raising gross proceeds of $276,000,000. Each unit includes one ordinary share and one-quarter of a warrant exercisable at $11.50 per share.
The sponsor and BTIG bought 762,000 private units for $7,620,000, bringing total cash in the trust account to $276,000,000 as of January 26, 2026. The audited balance sheet shows current cash outside the trust of $1,267,360, total assets of $277,516,995 and a shareholders’ deficit driven by $276,000,000 of ordinary shares classified as redeemable.
The SPAC has 24 months from the IPO closing to complete a business combination, or it must return trust funds (plus interest, less permitted amounts) to public shareholders. A total of 7,090,500 warrants are outstanding, and founders hold 6,900,000 locked-up founder shares aligned to 20% of post-IPO ordinary shares.