{"entity":{"type":"insider","cik":"0001774482","url":"/insider/0001774482","json_url":"/insider/0001774482.json","name":"CHMELIK THOMAS J","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":11,"n_filings":7,"first":"2020-03-17","last":"2025-12-10","span_basis":"filed_date"},"name_variants":[{"name":"CHMELIK THOMAS J","source":"filing","n_filings":7,"first_seen":"2020-03-17","last_seen":"2025-12-10"}],"transactions":[{"id":4565764,"accession":"0001437749-25-037333","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001437749-25-037333","line_url":"/filing/0001437749-25-037333","is_derivative":false,"issuer_cik":"0001693577","issuer_name":"MainStreet Bancshares, Inc.","issuer_ticker":"MNSB","issuer_name_source":null,"issuer_url":"/issuer/0001693577","owner_cik":"0001774482","owner_name":"CHMELIK THOMAS J","owner_display_name":"CHMELIK THOMAS J","owner_url":"/insider/0001774482","role":"Director, Officer (CFO, MainStreet Bancshares Inc)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"CFO, MainStreet Bancshares Inc","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7238.0,"shares_display":"7,238","price_per_share":20.08948051948052,"price_display":"20.09","price_state":"stated","total_value":145407.66,"total_display":"145,407.66","total_whole":"145,408","shares_owned_after":63761.0,"shares_owned_after_display":"63,761","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-12-09","filed_date":"2025-12-10","scope":"insider","n_lines":2},{"id":5212265,"accession":"0001437749-25-037138","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001437749-25-037138","line_url":"/filing/0001437749-25-037138","is_derivative":false,"issuer_cik":"0001693577","issuer_name":"MainStreet Bancshares, Inc.","issuer_ticker":"MNSB","issuer_name_source":null,"issuer_url":"/issuer/0001693577","owner_cik":"0001774482","owner_name":"CHMELIK THOMAS J","owner_display_name":"CHMELIK THOMAS J","owner_url":"/insider/0001774482","role":"Director, Officer (CFO, MainStreet Bancshares Inc)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"CFO, MainStreet Bancshares Inc","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":23577.0,"shares_display":"23,577","price_per_share":19.931613436824023,"price_display":"19.93","price_state":"stated","total_value":469927.65,"total_display":"469,927.65","total_whole":"469,928","shares_owned_after":82342.0,"shares_owned_after_display":"82,342","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-12-08","filed_date":"2025-12-08","scope":"insider","n_lines":2},{"id":4925197,"accession":"0001437749-25-036905","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001437749-25-036905","line_url":"/filing/0001437749-25-036905","is_derivative":false,"issuer_cik":"0001693577","issuer_name":"MainStreet Bancshares, Inc.","issuer_ticker":"MNSB","issuer_name_source":null,"issuer_url":"/issuer/0001693577","owner_cik":"0001774482","owner_name":"CHMELIK THOMAS J","owner_display_name":"CHMELIK THOMAS J","owner_url":"/insider/0001774482","role":"Director, Officer (CFO, MainStreet Bancshares Inc)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"CFO, MainStreet Bancshares Inc","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":9771.0,"shares_display":"9,771","price_per_share":19.821314092723366,"price_display":"19.82","price_state":"stated","total_value":193674.06,"total_display":"193,674.06","total_whole":"193,674","shares_owned_after":94576.0,"shares_owned_after_display":"94,576","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-12-03","filed_date":"2025-12-04","scope":"insider","n_lines":2},{"id":8299111,"accession":"0001437749-23-016041","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001437749-23-016041","line_url":"/filing/0001437749-23-016041","is_derivative":false,"issuer_cik":"0001693577","issuer_name":"MainStreet Bancshares, Inc.","issuer_ticker":"MNSB","issuer_name_source":null,"issuer_url":"/issuer/0001693577","owner_cik":"0001774482","owner_name":"CHMELIK THOMAS J","owner_display_name":"CHMELIK THOMAS J","owner_url":"/insider/0001774482","role":"Director, Officer (Chief Financial Officer)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":394.0,"shares_display":"394","price_per_share":21.006675126903552,"price_display":"21.01","price_state":"stated","total_value":8276.63,"total_display":"8,276.63","total_whole":"8,277","shares_owned_after":50244.0,"shares_owned_after_display":"50,244","ownership_form":"I","is_10b5_1":null,"transaction_date":"2023-05-23","filed_date":"2023-05-30","scope":"insider","n_lines":2},{"id":7975346,"accession":"0001437749-23-014728","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001437749-23-014728","line_url":"/filing/0001437749-23-014728#line-1","is_derivative":false,"issuer_cik":"0001693577","issuer_name":"MainStreet Bancshares, Inc.","issuer_ticker":"MNSB","issuer_name_source":null,"issuer_url":"/issuer/0001693577","owner_cik":"0001774482","owner_name":"CHMELIK THOMAS J","owner_display_name":"CHMELIK THOMAS J","owner_url":"/insider/0001774482","role":"Director, Officer (Chief Financial Officer)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":241.0,"shares_display":"241","price_per_share":20.63,"price_display":"20.63","price_state":"stated","total_value":4971.83,"total_display":"4,971.83","total_whole":"4,972","shares_owned_after":46085.0,"shares_owned_after_display":"46,085","ownership_form":"I","is_10b5_1":null,"transaction_date":"2023-05-12","filed_date":"2023-05-16","scope":"insider"},{"id":6243755,"accession":"0001209191-22-016637","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-22-016637","line_url":"/filing/0001209191-22-016637#line-1","is_derivative":false,"issuer_cik":"0001693577","issuer_name":"MainStreet Bancshares, Inc.","issuer_ticker":"MNSB","issuer_name_source":null,"issuer_url":"/issuer/0001693577","owner_cik":"0001774482","owner_name":"CHMELIK THOMAS J","owner_display_name":"CHMELIK THOMAS J","owner_url":"/insider/0001774482","role":"Director, Officer (Chief Financial Officer)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":500.0,"shares_display":"500","price_per_share":24.15,"price_display":"24.15","price_state":"stated","total_value":12075.0,"total_display":"12,075.00","total_whole":"12,075","shares_owned_after":90031.0,"shares_owned_after_display":"90,031","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-07","filed_date":"2022-03-07","scope":"insider"},{"id":3088395,"accession":"0001209191-20-019676","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-20-019676","line_url":"/filing/0001209191-20-019676#line-1","is_derivative":false,"issuer_cik":"0001693577","issuer_name":"MainStreet Bancshares, Inc.","issuer_ticker":"MNSB","issuer_name_source":null,"issuer_url":"/issuer/0001693577","owner_cik":"0001774482","owner_name":"CHMELIK THOMAS J","owner_display_name":"CHMELIK THOMAS J","owner_url":"/insider/0001774482","role":"Director, Officer (Chief Financial Officer)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":4040.0,"shares_display":"4,040","price_per_share":16.48,"price_display":"16.48","price_state":"stated","total_value":66579.2,"total_display":"66,579.20","total_whole":"66,579","shares_owned_after":45844.0,"shares_owned_after_display":"45,844","ownership_form":"I","is_10b5_1":null,"transaction_date":"2020-03-16","filed_date":"2020-03-17","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":11,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":5,"open_market":true},{"code":"S","label":"Open-market sale","n":6,"open_market":true},{"code":"M","label":"Option exercise","n":0,"open_market":false},{"code":"A","label":"Grant or award","n":0,"open_market":false},{"code":"F","label":"Tax withholding","n":0,"open_market":false},{"code":"D","label":"Disposition to the issuer","n":0,"open_market":false},{"code":"X","label":"In-the-money option exercise","n":0,"open_market":false}],"total":11},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001693577","name":"MainStreet Bancshares, Inc.","url":"/issuer/0001693577","role":"Director, Officer (CFO, MainStreet Bancshares Inc)","n_filings":7,"first_seen":"2020-03-17","last_seen":"2025-12-10"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001774482","retrieved_at":"2026-08-25T18:42:51+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-24","last_ingest":"2026-08-25T05:24:19.374141+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}