---
schema_version: "secwatch.filing_event.v1"
accession: "0001877939-26-000052"
form_type: "8-K"
ticker: "CTM"
cik: "0001877939"
company_name: "Castellum, Inc."
filed_at: "2026-06-24T20:02:33+00:00"
generated_at: "2026-06-24T20:03:17.234616+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Castellum subsidiary SSI awarded $4M U.S. Navy ADMACS modernization subcontract

## Summary
- Subsidiary SSI awarded $4M directed subcontract to modernize U.S. Navy's ADMACS system.
- Award issued under SAIC prime contract on GSA ASTRO pool; SSI is lead system integrator.
- SSI will execute phased modernization including DevSecOps, containerization, automated testing.
- Strengthens Castellum's software engineering and Navy mission-system sustainment portfolio.
- CEO cites contract as expanding higher-value modernization work and supporting organic growth.

## SEC filing metadata
- accession: 0001877939-26-000052
- form_type: 8-K
- ticker: CTM
- cik: 0001877939
- company_name: Castellum, Inc.
- filed_at: 2026-06-24T20:02:33+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000052/0001877939-26-000052-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000052/ctm-20260623.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001877939-26-000052
- JSON: https://secwatch.observer/filing/0001877939-26-000052.json
- Plain text: https://secwatch.observer/filing/0001877939-26-000052.txt

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