Institutional Ownership
Mainstreet Bancshares Inc
CUSIP 56064Y100COMMNSBQ1 2026
13D / 13G Filings
27
Schedule 13D/13G on record
Beneficial Filers
11
Distinct reporting persons
Largest Stake
10.0%
Max % of class reported
Institutional Holders
79
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
27 filings · latest Feb 24, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 24, 2026 | Mainstreet Bank 401(K) Retirement Plan | 13G | 5.1% | 383.8K | SEC |
| 2 | Feb 13, 2026 | Fourthstone LLC | 13G/A | 10.0% | 767.8K | SEC |
| 3 | Feb 13, 2026 | Banc Fund Ix L.P. | 13G/A | 5.6% | 422.0K | SEC |
| 4 | Feb 10, 2026 | Wellington Management Group LLP | 13G/A | 4.7% | 359.4K | SEC |
| 5 | Nov 14, 2025 | Fourthstone LLC | 13G | 6.6% | 509.9K | SEC |
| 6 | Nov 15, 2024 | Alliancebernstein L.P. | 13G/A | 8.5% | 648.8K | SEC |
| 7 | Nov 8, 2024 | Wellington Management Group LLP | 13G/A | 5.6% | 428.6K | SEC |
| 8 | Feb 14, 2024 | Alliancebernstein L.P. | 13G/A | 7.4% | 560.2K | SEC |
| 9 | Feb 9, 2024 | Banc Funds Co LLC | 13G/A | 3.3% | 245.7K | SEC |
| 10 | Feb 8, 2024 | Wellington Management Group LLP | 13G | 7.3% | 549.7K | SEC |
17 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Mainstreet Bancshares Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Banc Funds Co LLC | 530.9K | $11.79M |
| 2 | Alliancebernstein L.P. | 554.7K | $11.29M |
| 3 | Fourthstone LLC | 384.8K | $8.54M |
| 4 | Wellington Management Group LLP | 352.7K | $7.83M |
| 5 | Blackrock, Inc. | 347.6K | $7.72M |
| 6 | First Manhattan Co. LLC. | 188.1K | $4.18M |
| 7 | Dimensional Fund Advisors LP | 166.6K | $3.70M |
| 8 | Geode Capital Management, LLC | 147.2K | $3.27M |
| 9 | Ubs Group AG | 113.2K | $2.51M |
| 10 | Marshall Wace, LLP | 106.2K | $2.36M |