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.
Key figures
- Insider buys
- 0
- Open market, last 90 days
- Insider sells
- 0
- Open market, last 90 days
- 13F holders
- 87
- Q4 2025, +15 vs. previous quarter
- 13F value
- $81.0M
- Reported value at the end of Q4 2025
- Superinvestors holding
- 0
- At the end of Q4 2025
Superinvestors holding MBCN, Q4 2025
No superinvestor reported holding MBCN at the end of Q4 2025.
Latest insider trades
Open-market purchases and sales by Middlefield Banc Corp insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Mar 27, 2025 (view filing) | Feb 21 | 34 daysLate | DiGeronimo Kevin ADirector | PPurchase | +1.95K | $25.65 | +$50.0K | +71.8%4.67K after | |
| Feb 25, 2025 (view filing) | Feb 21 | 4 days | Voinovich Michael CDirector | PPurchase | +120 | $26.00 | +$3.12K | +18.5%768.78 after | |
| Feb 24, 2025 (view filing) | Feb 21 | 3 days | Ranttila MichaelEVP/CFO | PPurchase | +48 | $25.15 | +$1.21K | +2,400.0%50 after | |
| Feb 4, 2025 (view filing) | Feb 3 | 1 day | Ranttila MichaelEVP/CFO | PPurchase | +300 | $25.50 | +$7.65K | New position300 after | |
| Sep 19, 2024 (view filing) | Sep 16 | 3 daysLate | Zimmerly Ronald Len Jr.Chief Executive Officer | PPurchase | +212.28 | $28.47 | +$6.04K | +0.7%31.3K after | |
| Sep 19, 2024 (view filing) | May 13 | 129 days | Zimmerly Ronald Len Jr.Chief Executive Officer | PPurchase | +1.00K | $22.47 | +$22.5K | +12.8%8.79K after | Amended |
| Jun 6, 2024 (view filing) | Jun 5 | 1 day | Wilson Thomas MEVP-Chief Strategy Officer | PPurchase | +1.00K | $20.98 | +$21.0K | +8.7%12.5K after | |
| Jun 3, 2024 (view filing) | May 31 | 3 days | Moeller Jennifer LDirector | PPurchase | +200 | $21.40 | +$4.28K | +10.5%2.11K after | |
| May 9, 2024 (view filing) | May 9 | Same day | Moeller Jennifer LDirector | PPurchase | +250 | $23.00 | +$5.75K | +15.0%1.91K after | |
| May 9, 2024 (view filing) | May 9 | Same day | Wilson Thomas MEVP-Chief Strategy Officer | PPurchase | +1.00K | $22.38 | +$22.4K | +9.5%11.5K after |
Top 10 13F holders, Q4 2025
The largest institutional positions in Middlefield Banc Corp at the end of Q4 2025; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 464,415 | $16.0M | 0.00% | −9,146−1.9% | Reduced |
| Vanguard Group Inc | 411,069 | $14.2M | 0.00% | −2,669−0.6% | Reduced |
| Geode Capital Management, LLC | 172,196 | $5.95M | 0.00% | +1,458+0.9% | Added |
| State Street Corp | 112,447 | $3.88M | 0.00% | +8,422+8.1% | Added |
| Alliancebernstein L.P. | 105,015 | $3.63M | 0.00% | −92,501−46.8% | Reduced |
| Gardner Lewis Asset Management L P | 93,365 | $3.22M | 0.82% | +93,365 | New |
| Dimensional Fund Advisors LP | 84,399 | $2.91M | 0.00% | +522+0.6% | Added |
| Glazer Capital, LLC | 52,666 | $1.82M | 0.05% | +52,666 | New |
| Bridgeway Capital Management, LLC | 50,775 | $1.75M | 0.04% | +353+0.7% | Added |
| Northern Trust Corp | 50,143 | $1.73M | 0.00% | −5,289−9.5% | Reduced |
Holders of 5% or more of MBCN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Middlefield Banc Corp.
| 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 |