--- schema_version: "secwatch.filing_event.v1" accession: "0001437749-26-002122" form_type: "8-K" ticker: "ARCI" cik: "0002083910" company_name: "Archimedes Tech SPAC Partners III Co." filed_at: "2026-01-27T23:59:59+00:00" generated_at: "2026-05-16T07:39:34.632666+00:00" event_type: "other_material" sentiment: "neutral" materiality_score: 0.5 calibrated_materiality_score: 0.5 confidence: "high" source: SEC EDGAR --- # Archimedes Tech SPAC Partners III closes $276M IPO; units trade on Nasdaq ## Summary - Raised $276M gross from 27.6M units at $10.00; over-allotment option fully exercised. - Private placement of 762,000 units to sponsor and BTIG raised $7.62M. - Trust account holds $276M from IPO and private placement proceeds. - Units (ARCIU) began trading Jan 23, 2026; shares/warrants expected to follow. - Company led by CEO Long Long and Chairman Eric R. Ball; no business combination announced. ## SEC filing metadata - accession: 0001437749-26-002122 - form_type: 8-K - ticker: ARCI - cik: 0002083910 - company_name: Archimedes Tech SPAC Partners III Co. - filed_at: 2026-01-27T23:59:59+00:00 - event_type: other_material - sentiment: neutral - materiality_score: 0.5 - calibrated_materiality_score: 0.5 - confidence: high - sec_items: 1.01, 3.02, 5.03, 8.01, 9.01 - EDGAR index: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/aiii20260126_8k.htm ## Machine-readable alternates - HTML: https://secwatch.observer/filing/0001437749-26-002122 - JSON: https://secwatch.observer/filing/0001437749-26-002122.json - Plain text: https://secwatch.observer/filing/0001437749-26-002122.txt ## Source-grounded claims - claim_id: d42c3ce0e65242ee990e1abaa2628a8f1fd8da55 claim: Archimedes Tech SPAC Partners III Co.: Adopted amended and restated memorandum and articles of association in connection with IPO (effective 2026-01-22). evidence_excerpt: On January 22, 2026, and in connection with the IPO, the Company adopted its Amended and Restated Memorandum and Articles of Association. evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: 171f7ee7ccd1272c5eeeab5ed2d92ffdd9eb36ae claim: Archimedes Tech SPAC Partners III Co. entered into Investment Management Trust Agreement with Odyssey Transfer and Trust Company valued at Trust agreement for $276,000,000 held for public shareholders (effective 2026-01-22). evidence_excerpt: Investment Management Trust Agreement, dated as of January 22, 2026, by and between the Company and Odyssey Transfer and Trust Company, as trustee evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: 2651da3e9e7d0ce529fbaa37734b290463362f01 claim: Archimedes Tech SPAC Partners III Co. entered into Private Units Subscription Agreement (Sponsor) with Archimedes Tech SPAC Sponsors III LLC valued at Private placement of units to Sponsor in connection with IPO (effective 2026-01-22). evidence_excerpt: ● Letter Agreement, dated January 22, 2026, by and among the Company, Archimedes Tech SPAC Sponsors III LLC (the “Sponsor”), the initial shareholders and the officers and directors of the Company; ● Investment Management Trust Agreement, dated as of January 22, 2026, by and between the Company and Odyssey Transfer and Trust Company, as trustee; ● Registration Rights Agreement, dated as of January 22, 2026, by and among the Company and certain security holders of the Company; ● Private Units Subscription Agreement, dated January 22, 2026, by and between the Company and the Sponsor; ● Private Units Subscription Agreement, dated January 22, 2026, by and between the Company and BTIG; ● Indemnity Agreement, dated as of January 22, 2026, by and among the Company and each of the officers and directors of the Company; and ● Administrative Services Agreement, dated January 22, 2026, by and betwee evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: 823cf131d7905e41c38b2e1167e695c4e2928a5d claim: Archimedes Tech SPAC Partners III Co. entered into Indemnity Agreement with Officers and directors of the Company valued at Indemnification for officers and directors (effective 2026-01-22). evidence_excerpt: Indemnity Agreement, dated as of January 22, 2026, by and among the Company and each of the officers and directors of the Company evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: 9cbac96bbc62beac4cce3e23c11750dc14b53cef claim: Archimedes Tech SPAC Partners III Co. entered into Underwriting Agreement with BTIG, LLC valued at Notional amount of $276,000,000 in gross proceeds from IPO, including over-allotment exercise; 27,60 (effective 2026-01-22). evidence_excerpt: Underwriting Agreement, dated January 22, 2026, by and between the Company and BTIG, LLC, as representative of the underwriters ("BTIG") evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: db5ccac71dc67a7ed3b502a01d2783bc4bf88808 claim: Archimedes Tech SPAC Partners III Co. entered into Warrant Agreement with Odyssey Transfer and Trust Company valued at Warrant agency services for redeemable warrants exercisable at $11.50 per share (effective 2026-01-22). evidence_excerpt: Warrant Agreement, dated as of January 22, 2026, by and between the Company and Odyssey Transfer and Trust Company, as warrant agent evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: de5c4f69dd203408a02e7f80ea9276ba822ae1ca claim: Archimedes Tech SPAC Partners III Co. entered into Private Units Subscription Agreement (BTIG) with BTIG, LLC valued at Private placement of units to BTIG in connection with IPO (effective 2026-01-22). evidence_excerpt: In connection therewith, the Company entered into the following agreements, forms of which were previously filed as exhibits to the Registration Statement: ● Underwriting Agreement, dated January 22, 2026, by and between the Company and BTIG, LLC, as representative of the underwriters (“BTIG”); ● Warrant Agreement, dated as of January 22, 2026, by and between the Company and Odyssey Transfer and Trust Company, as warrant agent; ● Letter Agreement, dated January 22, 2026, by and among the Company, Archimedes Tech SPAC Sponsors III LLC (the “Sponsor”), the initial shareholders and the officers and directors of the Company; ● Investment Management Trust Agreement, dated as of January 22, 2026, by and between the Company and Odyssey Transfer and Trust Company, as trustee; ● Registration Rights Agreement, dated as of January 22, 2026, by and among the Company and certain security holders of t evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: e7665448659f37b534c693f8d1be744aeb24573e claim: Archimedes Tech SPAC Partners III Co. entered into Letter Agreement with Archimedes Tech SPAC Sponsors III LLC, initial shareholders, officers and directors valued at Lock-up and other agreements typical for SPAC IPO insiders (effective 2026-01-22). evidence_excerpt: Letter Agreement, dated January 22, 2026, by and among the Company, Archimedes Tech SPAC Sponsors III LLC (the "Sponsor"), the initial shareholders and the officers and directors of the Company evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: fb44fbe0ec93ec1005225c5b0f78ff0746a39dde claim: Archimedes Tech SPAC Partners III Co. entered into Registration Rights Agreement with Certain security holders of the Company valued at Registration rights granted to certain security holders (effective 2026-01-22). evidence_excerpt: Registration Rights Agreement, dated as of January 22, 2026, by and among the Company and certain security holders of the Company evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm - claim_id: fcf68ffabba3ab0ff86a1ae51d4f5a67d072f92e claim: Archimedes Tech SPAC Partners III Co. entered into Administrative Services Agreement with Archimedes Tech SPAC Sponsors III LLC valued at Administrative services provided by Sponsor (effective 2026-01-22). evidence_excerpt: ● Letter Agreement, dated January 22, 2026, by and among the Company, Archimedes Tech SPAC Sponsors III LLC (the “Sponsor”), the initial shareholders and the officers and directors of the Company; ● Investment Management Trust Agreement, dated as of January 22, 2026, by and between the Company and Odyssey Transfer and Trust Company, as trustee; ● Registration Rights Agreement, dated as of January 22, 2026, by and among the Company and certain security holders of the Company; ● Private Units Subscription Agreement, dated January 22, 2026, by and between the Company and the Sponsor; ● Private Units Subscription Agreement, dated January 22, 2026, by and between the Company and BTIG; ● Indemnity Agreement, dated as of January 22, 2026, by and among the Company and each of the officers and directors of the Company; and ● Administrative Services Agreement, dated January 22, 2026, by and betwee evidence_url: https://www.sec.gov/Archives/edgar/data/2083910/000143774926002122/0001437749-26-002122-index.htm This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.