---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-211927"
form_type: "8-K"
ticker: "HII"
cik: "0001501585"
company_name: "HUNTINGTON INGALLS INDUSTRIES, INC."
filed_at: "2021-07-09T23:59:59+00:00"
generated_at: "2026-06-30T06:21:21.670880+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# HII to acquire Alion Science and Technology for $1.65 billion in cash

## Summary
- HII acquires all outstanding common stock of Alion Holding Corp. for $1.65B cash, subject to working capital and purchase price adjustments.
- Closing conditioned on antitrust approvals and no material adverse effect; no financing contingency.
- If antitrust approval fails or HII cannot obtain financing, HII pays a termination fee of $82.5 million.
- Acquisition must close by April 4, 2022, unless extended.

## SEC filing metadata
- accession: 0001193125-21-211927
- form_type: 8-K
- ticker: HII
- cik: 0001501585
- company_name: HUNTINGTON INGALLS INDUSTRIES, INC.
- filed_at: 2021-07-09T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1501585/000119312521211927/0001193125-21-211927-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1501585/000119312521211927/d201679d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-211927
- JSON: https://secwatch.observer/filing/0001193125-21-211927.json
- Plain text: https://secwatch.observer/filing/0001193125-21-211927.txt

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