메인스트리트 방크셰어스, Inc.
US ˙ NasdaqCM ˙ US56064Y1001

SecurityMNSB / MainStreet Bancshares, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership24,380 shares
Latest Disclosed Value $ 541,236
Morgan Stanley reports 7.88% decrease in ownership of MNSB / MainStreet Bancshares, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 24,380 shares of MainStreet Bancshares, Inc. (US:MNSB) valued at $541,236 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 26,465 shares of MainStreet Bancshares, Inc.. This represents a change in shares of -7.88% during the quarter. The current value of the position is $581,951 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MAINSTREET BANCSHARES COM 56064Y100 24,380 -2,085 -7.88 541 0.56 0.0000
2026-05-27 2025-12-31 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 26,465 1,066 4.20 539 1.70 0.0000
2026-02-13 2025-12-31 13F MAINSTREET BANCSHARES COM 56064Y100 26,465 1,066 539 0.0000
2026-05-27 2025-09-30 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 25,399 -2,768 -9.83 529 -0.56 0.0000
2025-11-14 2025-09-30 13F MAINSTREET BANCSHARES COM 56064Y100 25,399 -2,768 529 0.0000
2025-08-15 2025-06-30 13F MAINSTREET BANCSHARES COM 56064Y100 28,167 7,277 34.83 532 52.44 0.0000
2025-05-15 2025-03-31 13F MAINSTREET BANCSHARES COM 56064Y100 20,890 -2,083 -9.07 349 -15.90 0.0000
2025-05-15 2024-12-31 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 22,973 3,605 18.61 416 16.25 0.0000
2025-02-14 2024-12-31 13F MAINSTREET BANCSHARES COM 56064Y100 22,973 3,605 416 0.0000
2025-05-14 2024-09-30 13F/A-2 MAINSTREET BANCSHARES COM 56064Y100 19,368 -2,676 -12.14 357 -8.46 0.0000
2025-02-14 2024-09-30 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 19,368 -2,676 357 0.0000
2024-11-14 2024-09-30 13F MAINSTREET BANCSHARES COM 56064Y100 19,368 -2,676 357 0.0000
2025-05-14 2024-06-30 13F/A-2 MAINSTREET BANCSHARES COM 56064Y100 22,044 2,436 12.42 391 9.55 0.0000
2024-10-17 2024-06-30 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 22,044 2,436 391 0.0000
2024-08-14 2024-06-30 13F MAINSTREET BANCSHARES COM 56064Y100 22,044 2,436 391 0.0000
2024-10-17 2024-03-31 13F/A-2 MAINSTREET BANCSHARES COM 56064Y100 19,608 -5,977 -23.36 356 -43.85 0.0000
2024-08-16 2024-03-31 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 19,608 -5,977 356 0.0000
2024-05-15 2024-03-31 13F MAINSTREET BANCSHARES COM 56064Y100 19,608 -5,977 356 0.0000
2024-08-16 2023-12-31 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 25,585 13,866 118.32 635 164.17 0.0001
2024-02-13 2023-12-31 13F MAINSTREET BANCSHARES COM 56064Y100 25,585 13,866 635 0.0001
2023-11-15 2023-09-30 13F MAINSTREET BANCSHARES COM 56064Y100 11,719 1,088 10.23 241 0.00 0.0000
2023-08-14 2023-06-30 13F MAINSTREET BANCSHARES COM 56064Y100 10,631 -6,033 -36.20 241 -38.62 0.0000
2023-05-15 2023-03-31 13F MAINSTREET BANCSHARES COM 56064Y100 16,664 10,355 164.13 391 126.01 0.0000
2023-02-14 2022-12-31 13F MAINSTREET BANCSHARES COM 56064Y100 6,309 5,966 1,739.36 173 2,062.50 0.0000
2022-11-14 2022-09-30 13F MAINSTREET BANCSHARES COM 56064Y100 343 -5,960 -94.56 8 -94.41 0.0000
2022-10-27 2022-06-30 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 6,303 -19,078 -75.17 143 -76.82 0.0000
2022-08-15 2022-06-30 13F MAINSTREET BANCSHARES COM 56064Y100 6,303 -19,078 143 0.0000
2022-10-27 2022-03-31 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 25,381 -4,788 -15.87 617 -16.85 0.0001
2022-05-13 2022-03-31 13F MAINSTREET BANCSHARES COM 56064Y100 25,381 -4,788 617 0.0001
2022-02-14 2021-12-31 13F MAINSTREET BANCSHARES COM 56064Y100 30,169 -222 -0.73 742 1.78 0.0001
2021-11-15 2021-09-30 13F MAINSTREET BANCSHARES COM 56064Y100 30,391 29,777 4,849.67 729 5,107.14 0.0001
2021-08-23 2021-06-30 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 614 312 103.31 14 133.33 0.0000
2021-08-16 2021-06-30 13F MAINSTREET BANCSHARES COM 56064Y100 614 312 14 0.0000
2021-05-17 2021-03-31 13F MAINSTREET BANCSHARES COM 56064Y100 302 -4,440 -93.63 6 -92.50 0.0000
2021-02-16 2020-12-31 13F MAINSTREET BANCSHARES COM 56064Y100 4,742 4,095 632.92 80 900.00 0.0000
2020-11-13 2020-09-30 13F MAINSTREET BANCSHARES COM 56064Y100 647 -1,551 -70.56 8 -72.41 0.0000
2020-08-14 2020-06-30 13F MAINSTREET BANCSHARES COM 56064Y100 2,198 1,649 300.36 29 222.22 0.0000
2020-05-26 2020-03-31 13F/A-1 MAINSTREET BANCSHARES COM 56064Y100 549 -8,983 -94.24 9 -95.89 0.0000
2020-05-15 2020-03-31 13F MAINSTREET BANCSHARES COM 56064Y100 549 -8,983 9 0.6914
2020-02-14 2019-12-31 13F MAINSTREET BANCSHARES COM 56064Y100 9,532 7,538 378.03 219 421.43 0.0001
2019-11-14 2019-09-30 13F MAINSTREET BANCSHARES COM 56064Y100 1,994 861 75.99 42 61.54 0.0000
2019-08-14 2019-06-30 13F MAINSTREET BANCSHARES COM 56064Y100 1,133 1,133 26 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.