---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-013445"
form_type: "8-K"
ticker: "CTM"
cik: "0001877939"
company_name: "Castellum, Inc."
filed_at: "2025-03-18T23:59:59+00:00"
generated_at: "2026-05-24T14:34:52.848380+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Castellum closes $4.5M unit offering; subsidiary earns CMMI Level 3 appraisal

## Summary
- Closed public offering of 4,500,000 units at $1.00/unit, each unit = 1 common share + 1 warrant exercisable at $1.08 for 60 days; gross proceeds $4.5M.
- Net proceeds to be used for working capital and general corporate purposes; Maxim Group acted as sole placement agent with 7% fee.
- Directors and officers subject to 60-day lock-up; 60-day standstill on equity issuance, extended by 30 days if majority of warrants exercised.
- Subsidiary Global Technology and Management Resources achieved CMMI Maturity Level 3 appraisal, boosting competitiveness for government proposals.

## SEC filing metadata
- accession: 0001628280-25-013445
- form_type: 8-K
- ticker: CTM
- cik: 0001877939
- company_name: Castellum, Inc.
- filed_at: 2025-03-18T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1877939/000162828025013445/0001628280-25-013445-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1877939/000162828025013445/ctm-20250314.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-013445
- JSON: https://secwatch.observer/filing/0001628280-25-013445.json
- Plain text: https://secwatch.observer/filing/0001628280-25-013445.txt

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