---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-178071"
form_type: "8-K"
ticker: null
cik: "0000836147"
company_name: "MIDDLEFIELD BANC CORP"
filed_at: "2024-07-12T23:59:59+00:00"
generated_at: "2026-05-31T21:36:27.971755+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Director Darryl E. Mast will not stand for reelection at 2025 Annual Meeting

## Summary
- Director Darryl E. Mast notified Middlefield Banc Corp. he will not run for reelection at the 2025 Annual Meeting.
- Mast's departure is for personal reasons; no disagreement with management or board.
- Mast served as director since 2013, including Audit, Executive, and Risk & Compliance committees.
- His final day as Board member will be at the 2025 Annual Meeting.

## SEC filing metadata
- accession: 0001193125-24-178071
- form_type: 8-K
- cik: 0000836147
- company_name: MIDDLEFIELD BANC CORP
- filed_at: 2024-07-12T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/836147/000119312524178071/0001193125-24-178071-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/836147/000119312524178071/d813595d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-178071
- JSON: https://secwatch.observer/filing/0001193125-24-178071.json
- Plain text: https://secwatch.observer/filing/0001193125-24-178071.txt

## Key facts
- Executive change
  Darryl E. Mast departed as Director at MIDDLEFIELD BANC CORP.
  - Action: not run for reelection
  - Role: Director
  source text: On July 8, 2024 Darryl E. Mast, a member of the Board of Directors (“Board”) of Middlefield Banc Corp. (the “Company”), notified the Company of his decision to not run for reelection as a Board member for the Company at its 2025 Annual Meeting, which will also be Mr. Mast’s final day as a Board member.
  evidence_url: https://www.sec.gov/Archives/edgar/data/836147/000119312524178071/0001193125-24-178071-index.htm

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