---
schema_version: "secwatch.filing_event.v1"
accession: "0001877939-26-000044"
form_type: "8-K"
ticker: "CTM"
cik: "0001877939"
company_name: "Castellum, Inc."
filed_at: "2026-05-20T20:01:13+00:00"
generated_at: "2026-05-20T21:51:48.206494+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Castellum stockholders re-elect 5 directors, ratify auditor, approve stock plan amendment

## Summary
- All five director nominees elected with 53-65% of votes cast for each; broker non-votes ~22.8M.
- RSM US LLP ratified as auditor for FY 2026 with 53.8M for, 2.6M against.
- Amendment to 2021 Stock Incentive Plan approved to increase reserved shares to 13,000,000 (19.8M for, 13.6M against).
- All three proposals passed; no change in board composition or audit firm.

## SEC filing metadata
- accession: 0001877939-26-000044
- form_type: 8-K
- ticker: CTM
- cik: 0001877939
- company_name: Castellum, Inc.
- filed_at: 2026-05-20T20:01:13+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.07, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000044/0001877939-26-000044-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000044/ctm-20260519.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001877939-26-000044
- JSON: https://secwatch.observer/filing/0001877939-26-000044.json
- Plain text: https://secwatch.observer/filing/0001877939-26-000044.txt

## Key facts
- Shareholder Votes
  Castellum, Inc. shareholders approved Election of five directors at the 2026-05-19 meeting.
  - Proposal: director election
  - Outcome: passed
  - Meeting: 2026-05-19
  source text: Stockholders elected five directors of the Company to hold office until the next Annual Meeting of Stockholders and until their successors are duly elected and qualify. The name of each director elected, and the votes cast for such individuals are set forth below: Name For Withheld Broker Non-Votes Mark S. Alarie 26,773,763 6,942,753 22,789,172 John F. Campbell 26,063,019 7,653,497 22,789,172 Bernard S. Champoux 26,970,017 6,746,499 22,789,172 Glen R. Ives 29,097,115 4,619,401 22,789,172 C. Thomas McMillen 26,288,648 7,427,868 22,789,172
  evidence_url: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000044/0001877939-26-000044-index.htm
- Shareholder Votes
  Castellum, Inc. shareholders approved Amendment to the Castellum, Inc. Second Amended 2021 Stock Incentive Plan to increase aggregate shares reserved to 13,000,000 at the 2026-05-19 meeting.
  - Proposal: equity plan
  - Outcome: passed
  - Meeting: 2026-05-19
  source text: Stockholders approved an amendment to the Castellum, Inc. Second Amended 2021 Stock Incentive Plan to increase the aggregate number of shares reserved for issuance under the plan to 13,000,000. The votes regarding Proposal 3 are set forth below: For Against Abstentions Broker Non-Votes 19,780,876 13,632,126 303,514 22,789,172
  evidence_url: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000044/0001877939-26-000044-index.htm
- Shareholder Votes
  Castellum, Inc. shareholders approved Ratify the appointment of RSM US LLP as independent registered public accounting firm for fiscal year ended December 31, 2026 at the 2026-05-19 meeting.
  - Proposal: auditor ratification
  - Outcome: passed
  - Meeting: 2026-05-19
  source text: Stockholders approved a proposal to ratify the Company’s appointment of RSM US LLP as the Company’s independent registered public accounting firm for the fiscal year ended December 31, 2026. The votes regarding Proposal 2 are set forth below: For Against Abstentions 53,771,662 2,553,667 180,359
  evidence_url: https://www.sec.gov/Archives/edgar/data/1877939/000187793926000044/0001877939-26-000044-index.htm

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