Archimedes Tech SPAC Partners III Co. filings document the company's SPAC security structure, trust-account arrangements, public and private unit issuances, and Nasdaq-listed ordinary shares and warrants. The Form 8-K record includes material-event disclosures on the ARCIU unit structure, separate trading of ordinary shares and warrants, IPO-related trust funding, private placement units, emerging growth company status and governance changes.
Archimedes Tech SPAC Partners III Co. beneficial ownership disclosure: Adage Capital Management, L.P., together with Robert Atchinson and Phillip Gross, report shared voting and dispositive power over 1,800,000 Ordinary Shares, representing 5.10% of 35,262,000 Ordinary Shares outstanding as of January 26, 2026.
The shares are directly held by Adage Capital Partners, L.P. and reported by the named managers in a joint Schedule 13G filing; the cover lists CUSIP G0453R105.
Archimedes Tech SPAC Partners III Co. beneficial ownership disclosure: Adage Capital Management, L.P., together with Robert Atchinson and Phillip Gross, report shared voting and dispositive power over 1,800,000 Ordinary Shares, representing 5.10% of 35,262,000 Ordinary Shares outstanding as of January 26, 2026.
The shares are directly held by Adage Capital Partners, L.P. and reported by the named managers in a joint Schedule 13G filing; the cover lists CUSIP G0453R105.
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. 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.
Archimedes Tech SPAC Partners III Co. is offering $240,000,000 through the sale of 24,000,000 units at $10.00 per unit. Each unit consists of one ordinary share and one-fourth of one warrant; whole warrants exercisable at $11.50 per share under the stated terms.
The prospectus states proceeds (including private units) of $246,900,000 and that $240,000,000 will be deposited in a U.S.-based trust account. The company is a Cayman Islands blank check company with a 24-month completion window to consummate an initial business combination, subject to permitted extensions and shareholder approval.