---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-26-012856"
form_type: "8-K"
ticker: "ATII"
cik: "0002028516"
company_name: "Archimedes Tech SPAC Partners II Co."
filed_at: "2026-04-20T23:59:59+00:00"
generated_at: "2026-05-15T05:23:36.737093+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Archimedes Tech SPAC to merge with Forge Nano at $1.2B enterprise value; expected close Q3 2026

## Summary
- Merger values Forge Nano at $1.2B; SPAC shareholders receive $10 per share reference price for Pubco Common Stock.
- Up to 90M earn-out shares issuable if Pubco shares hit $15/$20/$25 or revenue reaches $400M/$600M/$800M within 5 years.
- Sponsor agreed to vote for deal and not redeem; contributes up to 3.3M ordinary shares to secure financing.
- Forge Nano stockholders representing ~56% of pro forma shares (66% under max redemptions) subject to 6-month lock-up.
- Closing expected in Q3 2026; subject to shareholder approval, HSR clearance, SEC effectiveness, and Nasdaq listing.

## SEC filing metadata
- accession: 0001437749-26-012856
- form_type: 8-K
- ticker: ATII
- cik: 0002028516
- company_name: Archimedes Tech SPAC Partners II Co.
- filed_at: 2026-04-20T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.01, 3.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2028516/000143774926012856/0001437749-26-012856-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2028516/000143774926012856/atii20260419_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-26-012856
- JSON: https://secwatch.observer/filing/0001437749-26-012856.json
- Plain text: https://secwatch.observer/filing/0001437749-26-012856.txt

## Source-grounded claims
- claim_id: f09c0b1d2dd06629ad057a85fccc5af923dd9dec
  claim: Archimedes Tech SPAC Partners II Co. entered into Agreement and Plan of Merger with Forge Nano, Inc. (effective 2026-04-20).
  evidence_excerpt: On April 20, 2026, Archimedes Tech SPAC Partners II Co., a Cayman Islands exempted company (“ ATII ” or the “ Company ”), ATII Holdings Inc., a Delaware corporation and a wholly-owned subsidiary of ATII (“ Pubco ”), ATII Merger Sub Inc., a Delaware corporation and a wholly-owned subsidiary of ATII (“ Merger Sub I ”), ATII Merger Sub II, LLC, a Delaware limited liability company and a wholly owned subsidiary of ATII (“ Merger Sub II ”) and Forge Nano, Inc., a Delaware corporation (“ Forge Nano ”), entered into an Agreement and Plan of Merger (the “ Merger Agreement ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/2028516/000143774926012856/0001437749-26-012856-index.htm

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