{"filing": {"accession": "0001437749-26-008073", "cik": "0001693577", "ticker": "MNSB", "company_name": "MainStreet Bancshares, Inc.", "form_type": "10-K", "filing_type": "10-K", "filing_date": "2026-03-13", "accepted_datetime": null, "acceptance_datetime": null, "accepted_at": null, "primary_doc_url": "https://www.sec.gov/Archives/edgar/data/1693577/000143774926008073/0001437749-26-008073-index.htm", "filing_url": "https://www.sec.gov/Archives/edgar/data/1693577/000143774926008073/0001437749-26-008073-index.htm", "period_of_report": "2025-12-31"}, "html_url": "/api/filings/000143774926008073/stream", "exhibits": [{"exhibit_number": "19.0", "exhibit_type": "19", "description": "Insider Trading Policies and Procedures, as amended", "filename": "ex_869265.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1693577/000143774926008073/ex_869265.htm", "category": "other", "incorporated_by_reference": false}, {"exhibit_number": "21.1", "exhibit_type": "21", "description": 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"Description of the Registrant\u2019s Securities Registered pursuant to section 12 of the Securities Exchange Act of 1934 (incorporated by reference to Exhibit 4.3 to the Company\u2019s Form 10-K filed on March 23, 2021)", "filename": "", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1693577/000156459022011471/mnsb-ex43_6.htm", "category": "debt", "incorporated_by_reference": true}, {"exhibit_number": "4.3", "exhibit_type": "4", "description": "Deposit Agreement, dated as of September 15, 2020, by and among the Company, American Stock Transfer and Trust Company, LLC, and the holder from time to time of the Depositary Receipts decided therein (incorporated by reference to Exhibit 4.1 to the Company\u2019s Form 8-K filed on September 15, 2020)", "filename": "", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1693577/000119312520246076/d67591dex41.htm", "category": "debt", "incorporated_by_reference": true}, {"exhibit_number": "4.4", "exhibit_type": "4", "description": "Form 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Dick, Thomas J. Chmelik, and Abdul Hersiburane (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on November 21, 2022)", "filename": "", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1693577/000143774922027837/ex_449394.htm", "category": "contracts", "incorporated_by_reference": true}, {"exhibit_number": "10.10", "exhibit_type": "10", "description": "Form of Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.10 to the Company\u2019s Form 10-K filed on March 23, 2023).", "filename": "", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1693577/000143774923007608/ex_489639.htm", "category": "contracts", "incorporated_by_reference": true}, {"exhibit_number": "10.11", "exhibit_type": "10", "description": "Employment Agreement with Richard A. Vari (incorporated by reference to Exhibit 10.1 to the Company\u2019s Form 8-K filed on December 23, 2025).", "filename": "", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1693577/000143774925027799/ex_856288.htm", "category": "contracts", "incorporated_by_reference": true}, {"exhibit_number": "10.12", "exhibit_type": "10", "description": "Form of Indemnification Agreement with Richard A. 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{"table_index": 223, "table_type": "text", "caption": null, "header_text": "(Dollars in thousands)20252024"}, {"table_index": 224, "table_type": "text", "caption": null, "header_text": "(Dollars in thousands)20252024"}, {"table_index": 225, "table_type": "financial", "caption": null, "header_text": "December 31,20252024"}, {"table_index": 226, "table_type": "financial", "caption": null, "header_text": "For the Year Ended December 31,202520242023"}, {"table_index": 227, "table_type": "financial", "caption": null, "header_text": "Year Ended December 31,202520242023"}, {"table_index": 228, "table_type": "financial", "caption": null, "header_text": "For the Year ended December 31, 2025"}, {"table_index": 229, "table_type": "financial", "caption": null, "header_text": "\u2022Less interest expense on deposit accounts related to interest rate decreases in the year endedDecember 31, 2025."}, {"table_index": 231, "table_type": "financial", "caption": null, "header_text": "For the Year ended December 31, 2024"}, {"table_index": 232, "table_type": "financial", "caption": null, "header_text": "\u2022higher interest expense due primarily to higher rates on deposits and higher balances of interest-bearing deposits, specifically money market and time deposits;"}, {"table_index": 233, "table_type": "financial", "caption": null, "header_text": "\u2022impairment of the computer software intangible asset. The impairment charge of $19.7million reduced fully the carrying value of the Company's intangible asset of $19.1million and the related prepaid "}, {"table_index": 234, "table_type": "financial", "caption": null, "header_text": "For the Year ended December 31, 2023"}, {"table_index": 235, "table_type": "financial", "caption": null, "header_text": "ExhibitNumberDescription"}, {"table_index": 236, "table_type": "text", "caption": null, "header_text": "MAINSTREET BANCHSHARES, INC"}, {"table_index": 237, "table_type": "text", "caption": null, "header_text": "Date: March 13, 2026By:/s/ Jeff W. Dick"}], "exhibits_pending": false, "cdn_html": true, "response_time_ms": 51}