Middlefield Banc Corp
MBCNDelisted Mar 2, 2026- Industry
- State Commercial Banks
- SEC CIK
- 0000836147
Middlefield Banc Corp was delisted on Mar 2, 2026; its insiders filed their last Form 4 on Mar 2, 2026; 87 institutions reported holding it in 13F filings for Q4 2025, worth $81.0M in total; no superinvestor held it.
Holders of 5% or more of MBCN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Middlefield Banc Corp, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Vanguard Group Inc | 13G | 5.14%416.1K shares | New | Jul 29, 20251 filing | Jul 29, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
2 Schedule 13D and 13G filings on Middlefield Banc Corp, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Feb 4, 20264:24 PM ET | Castle Creek Capital Partners VI, LPand 1 other | 13D/A | 3.90%312.8K shares | –Below 5% | Jan 30, 2026 | SEC |
| Jul 29, 20251:55 PM ET | Vanguard Group Inc | 13G | 5.14%416.1K shares | New | Jun 30, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Middlefield Banc Corp shares.
No Form 144 notices for Middlefield Banc Corp are on file.