85 institutions reported holding $67 of MIDDLEFIELD BANC CORP (MBCN) in SEC 13F filings for 2026-03-31. Largest institutional holders: IFP Advisors, Inc ($67), Prospera Financial Services Inc ($0), NORTHERN TRUST CORP ($0), Ameritas Investment Partners, Inc. ($0), GLAZER CAPITAL, LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IFP Advisors, Inc | $67 | 2 | Hold |
| 2 | Prospera Financial Services Inc | $0 | 0 | Exited |
| 3 | NORTHERN TRUST CORP | $0 | 0 | Exited |
| 4 | Ameritas Investment Partners, Inc. | $0 | 0 | Exited |
| 5 | GLAZER CAPITAL, LLC | $0 | 0 | Exited |
| 6 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $0 | 0 | Exited |
| 7 | CSS LLC/IL | $0 | 0 | Exited |
| 8 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $0 | 0 | Exited |
| 9 | ALLIANCEBERNSTEIN L.P. | $0 | 0 | Exited |
| 10 | RHUMBLINE ADVISERS | $0 | 0 | Exited |
| 11 | BNP PARIBAS FINANCIAL MARKETS | $0 | 0 | Exited |
| 12 | LONGFELLOW INVESTMENT MANAGEMENT CO LLC | $0 | 0 | Exited |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | $0 | 0 | Exited |
| 14 | MILLENNIUM MANAGEMENT LLC | $0 | 0 | Exited |
| 15 | Sterling Capital Management LLC | $0 | 0 | Exited |
| 16 | MCDONALD PARTNERS LLC | $0 | 0 | Exited |
| 17 | PRELUDE CAPITAL MANAGEMENT, LLC | $0 | 0 | Exited |
| 18 | Bank of New York Mellon Corp | $0 | 0 | Exited |
| 19 | Cambridge Investment Research Advisors, Inc. | $0 | 0 | Exited |
| 20 | CITADEL ADVISORS LLC | $0 | 0 | Exited |
| 21 | OXFORD ASSET MANAGEMENT LLP | $0 | 0 | Exited |
| 22 | Ancora Advisors LLC | $0 | 0 | Exited |
| 23 | MAI Capital Management | $0 | 0 | Exited |
| 24 | UNITED CAPITAL FINANCIAL ADVISORS, LLC | $0 | 0 | Exited |
| 25 | YHB Investment Advisors, Inc. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31