13F reference period
Q2 2026
Security Snapshot
MainStreet Bancshares, Inc. - Common Stock, par value $4.00 per share (MNSB) Institutional Ownership
CUSIP: 56064Y100
13F Institutional Holders and Ownership History from Q2 2016 to Q3 2026
Institutions Reporting
95
Shares (Excl. Options)
4.06M
Full value: 4,064,179 · shares · 30 Jun 2026Price
$24.69
The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.
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- Security type / class
- Equity / Common Stock, par value $4.00 per share
- Symbol
- MNSB on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 4,064,179
- Total 13F value
- $99,298,648
- Portfolio coverage rank
- 0%
- Share change
- -179,481
- Value change
- -$4,197,753
- Number of holders
- 95
- Shares outstanding
- 7,079,403
- SEC-reported price per share
- $24.74
- Insider filing price
- $24.74
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- MNSB - MainStreet Bancshares, Inc. - Common Stock, par value $4.00 per share is tracked under CUSIP 56064Y100.
- 95 institutions reported positions in Q2 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 84 to 95 between Q1 2026 and Q2 2026.
- SEC-reported value moved from to
$93.09M
Full value: $93,090,304 · USD · 31 Mar 2026.$99.3M
Full value: $99,298,648 · USD · 30 Jun 2026
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 95 institutions filings for Q2 2026.
Security key
56064Y100
13F reference period
Q2 2026
13F holders
95
13D/G owners
5
CIK / CUSIP context first
Open Q2 2026 holders
MNSB full holder history
MainStreet Bancshares, Inc. SEC filings
MainStreet Bancshares, Inc. company facts
MainStreet Bancshares, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 56064Y100:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
MNSB
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| ALLIANCEBERNSTEIN L.P. | 5.9% | -20% | $10,330,123 | -$3,365,988 | 418,393 | -25% | AllianceBernstein L.P. | 30 Jun 2026 |
| BlackRock, Inc. | 5.6% | $9,790,229 | 396,555 | BlackRock, Inc. | 30 Jun 2026 | |||
| MainStreet Bank 401(k) Retirement Plan | 5.1% | $7,870,979 | 383,763 | MainStreet Bank 401(k) Retirement Plan | 31 Dec 2025 | |||
| WELLINGTON MANAGEMENT GROUP LLP | 4.7% | $7,317,608 | 359,411 | Wellington Management Group LLP | 31 Dec 2025 | |||
| Fourthstone LLC | 0.67% | -91% | $1,171,096 | -$8,329,665 | 47,432 | -88% | Fourthstone LLC | 30 Jun 2026 |
As of 30 Jun 2026,
95
institutional investors reported holding
shares of
MainStreet Bancshares, Inc. - Common Stock, par value $4.00 per share (MNSB).
This represents
57%
of the company’s total
outstanding shares.
4.06M
Full value: 4,064,179 · shares · 30 Jun 20267.08M
Full value: 7,079,403 · shares · Stored outstanding share count13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
50%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BANC FUNDS CO LLC | 7.7% | 545,679 | +2.8% | 2.2% | $13,472,815 |
| ALLIANCEBERNSTEIN L.P. | 5.9% | 418,393 | -25% | 0% | $9,288,325 |
| BlackRock, Inc. | 5.7% | 404,037 | +16% | 0% | $9,975,675 |
| WELLINGTON MANAGEMENT GROUP LLP | 4.8% | 336,961 | -4.5% | 0% | $8,319,567 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.7% | 262,466 | -13% | 0% | $6,480,286 |
| DIMENSIONAL FUND ADVISORS LP | 2.9% | 205,014 | +23% | 0% | $5,061,763 |
| ACADIAN ASSET MANAGEMENT LLC | 2.6% | 183,245 | +37% | 0.01% | $4,518,000 |
| FIRST MANHATTAN CO. LLC. | 2.3% | 161,731 | -14% | 0.01% | $3,993,138 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1% | 152,196 | +3.4% | 0% | $3,758,183 |
| MARSHALL WACE, LLP | 1.7% | 120,194 | +13% | 0% | $2,967,589 |
| STATE STREET CORP | 1.5% | 109,465 | +9.2% | 0% | $2,702,691 |
| AMERICAN CENTURY COMPANIES INC | 1.4% | 101,604 | +93% | 0% | $2,508,603 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 0.94% | 66,551 | +4.4% | 0.03% | $1,643,144 |
| Cresset Asset Management, LLC | 0.83% | 59,040 | -18% | 0.01% | $1,457,697 |
| CITADEL ADVISORS LLC | 0.82% | 58,344 | +148% | 0% | $1,440,513 |
| NORTHERN TRUST CORP | 0.68% | 48,150 | +2.6% | 0% | $1,188,824 |
| Fourthstone LLC | 0.67% | 47,432 | -88% | 0.84% | $1,185,994 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.6% | 42,813 | +7.9% | 0% | $1,057,053 |
| Trexquant Investment LP | 0.56% | 39,525 | +132% | 0.01% | $975,872 |
| VANGUARD FIDUCIARY TRUST CO | 0.55% | 39,018 | +0.17% | 0% | $963,354 |
| Squarepoint Ops LLC | 0.53% | 37,233 | -27% | 0% | $919,283 |
| Empowered Funds, LLC | 0.53% | 37,171 | +8.1% | 0% | $917,752 |
| UBS Group AG | 0.47% | 33,102 | -71% | 0% | $817,288 |
| Connor, Clark & Lunn Investment Management Ltd. | 0.43% | 30,385 | -8.1% | 0% | $750,206 |
| AQR CAPITAL MANAGEMENT LLC | 0.42% | 29,408 | 0% | $726,083 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
42
Headline period
Q2 2026
Rows shown
1-25 of 42
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 37,674 | $939,046 | +$175,749 | $24.74 | 15 |
| 2026 Q2 | 4,064,179 | $99,298,648 | -$4,197,753 | $24.69 | 95 |
| 2026 Q1 | 4,239,188 | $93,090,304 | -$11,138,655 | $22.20 | 84 |
| 2025 Q4 | 4,749,321 | $96,690,484 | +$2,856,828 | $20.36 | 75 |
| 2025 Q3 | 4,589,305 | $95,527,235 | +$6,799,595 | $20.83 | 70 |
| 2025 Q2 | 4,266,844 | $80,648,091 | +$11,262,860 | $18.90 | 61 |
| 2025 Q1 | 3,702,538 | $61,907,545 | -$1,509,419 | $16.72 | 51 |
| 2024 Q4 | 3,789,817 | $68,594,548 | +$324,810 | $18.10 | 53 |
| 2024 Q3 | 3,770,610 | $69,566,920 | -$3,460,316 | $18.45 | 53 |
| 2024 Q2 | 3,935,503 | $69,774,685 | -$5,599,884 | $17.73 | 65 |
| 2024 Q1 | 4,265,818 | $77,464,108 | +$1,680,327 | $18.16 | 61 |
| 2023 Q4 | 4,191,299 | $103,968,287 | +$7,613,844 | $24.81 | 63 |
| 2023 Q3 | 3,850,135 | $79,080,643 | +$2,043,343 | $20.54 | 61 |
| 2023 Q2 | 3,773,569 | $85,505,904 | +$8,661,430 | $22.66 | 59 |
| 2023 Q1 | 3,348,821 | $78,657,624 | -$1,161,875 | $23.49 | 53 |
| 2022 Q4 | 3,365,456 | $92,509,925 | +$3,713,035 | $27.49 | 52 |
| 2022 Q3 | 3,268,472 | $74,553,000 | -$1,717,446 | $22.81 | 43 |
| 2022 Q2 | 3,343,443 | $76,134,000 | -$709,864 | $22.77 | 44 |
| 2022 Q1 | 3,407,056 | $82,826,000 | -$861,529 | $24.31 | 43 |
| 2021 Q4 | 3,442,262 | $84,642,402 | +$7,120,673 | $24.59 | 45 |
| 2021 Q3 | 3,130,073 | $75,087,367 | -$2,560,816 | $23.99 | 39 |
| 2021 Q2 | 3,246,224 | $73,315,274 | -$7,121,400 | $22.58 | 44 |
| 2021 Q1 | 3,572,641 | $74,174,695 | +$528,042 | $20.76 | 49 |
| 2020 Q4 | 3,546,723 | $59,974,987 | -$7,707,353 | $16.91 | 50 |
| 2020 Q3 | 4,016,842 | $49,165,743 | +$574,997 | $12.24 | 51 |