---
schema_version: "secwatch.filing_event.v1"
accession: "0001877939-26-000040"
form_type: "8-K"
ticker: "CTM"
cik: "0001877939"
company_name: "Castellum, Inc."
filed_at: "2026-05-18T10:55:43+00:00"
generated_at: "2026-05-18T11:00:53.510309+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Castellum reminds stockholders to vote at 2026 Annual Meeting on May 19

## Summary
- Annual meeting scheduled May 19, 2026 at 10:00 a.m. ET; record date March 20, 2026.
- In-person at Intelligent Office, Tysons, VA; virtual via dial-in (800-715-9871), conference ID 9842123.
- Management presentation to follow adjournment; copy posted on investor relations website.
- Stockholders encouraged to vote in advance via internet, telephone, or mail.

## SEC filing metadata
- accession: 0001877939-26-000040
- form_type: 8-K
- ticker: CTM
- cik: 0001877939
- company_name: Castellum, Inc.
- filed_at: 2026-05-18T10:55:43+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000040/0001877939-26-000040-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000040/ctm-20260518.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001877939-26-000040
- JSON: https://secwatch.observer/filing/0001877939-26-000040.json
- Plain text: https://secwatch.observer/filing/0001877939-26-000040.txt

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