---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-025425"
form_type: "8-K"
ticker: "ARCI"
cik: "0002083910"
company_name: "Archimedes Tech SPAC Partners III Co."
filed_at: "2026-03-10T23:59:59+00:00"
generated_at: "2026-05-15T17:12:23.366898+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Archimedes Tech SPAC units eligible for separate trading of shares and warrants on March 16

## Summary
- Separate trading of ordinary shares (ARCI) and warrants (ARCIW) begins March 16, 2026.
- Units not separated continue trading under ARCIU on Nasdaq.
- No fractional warrants issued; only whole warrants will trade.
- Holders contact broker and Odyssey Transfer and Trust Company to separate units.
- Offering made via prospectus from BTIG (ProspectusDelivery@btig.com).

## SEC filing metadata
- accession: 0001213900-26-025425
- form_type: 8-K
- ticker: ARCI
- cik: 0002083910
- company_name: Archimedes Tech SPAC Partners III Co.
- filed_at: 2026-03-10T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2083910/000121390026025425/0001213900-26-025425-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2083910/000121390026025425/ea028064201-8k_arch3co.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-025425
- JSON: https://secwatch.observer/filing/0001213900-26-025425.json
- Plain text: https://secwatch.observer/filing/0001213900-26-025425.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.