{"filing":{"accession_number":"0001437749-26-032969","cik":"0001659617","ticker":"MBRX","company_name":"Moleculin Biotech, Inc.","form":"8-K","filing_date":"2026-10-20","report_date":"2026-10-16","primary_document":"mbrx20261015d_8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1659617/000143774926032969/mbrx20261015d_8k.htm"},"events":[{"id":36253,"run_id":33416,"accession_number":"0001437749-26-032969","anchor_item_number":"5.03","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"summary":"Moleculin Biotech effected a 1-for-20 reverse stock split of its common stock, effective October 20, 2026, pursuant to stockholder approval and board authorization. The reverse split consolidated approximately 20.9 million outstanding shares into approximately 1.05 million shares, materially modifying the rights and economic interests of security holders by altering per-share economics, voting power, and the company's market capitalization presentation.","company_name":"Moleculin Biotech, Inc.","ticker":"MBRX","filing_date":"2026-10-20","form":"8-K","submitted_at":null,"items":[{"id":40600,"accession_number":"0001437749-26-032969","item_number":"3.03","item_title":"Material Modifications of Rights of Security Holders.","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The filing discloses a 1-for-20 reverse stock split of Moleculin's common stock, effective October 20, 2026, which materially modifies the rights and economic interests of security holders by consolidating shares and reducing outstanding shares from approximately 20.9 million to 1.05 million. While reverse splits are governance-related capital structure events, they do not fit the specific named categories (exec appointment/departure, compensation, M\u0026A, etc.) and are best classified as governance_other. The event is material because it fundamentally alters the per-share economics and voting power of existing shareholders.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-20T11:02:05.511390+00:00","company_name":"","ticker":null,"filing_date":""},{"id":40601,"accession_number":"0001437749-26-032969","item_number":"5.03","item_title":"Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"This disclosure reports stockholder approval and board implementation of a 1-for-20 reverse stock split, effected through an amendment to the certificate of incorporation filed with Delaware. While reverse stock splits are governance/capital structure matters, they are routine corporate actions that do not fit the specific governance categories (exec_departure, exec_appointment, exec_compensation, shareholder_vote_results). The event is material because it materially alters the share structure and trading characteristics of the company's common stock, affecting all shareholders' holdings and the company's market capitalization presentation.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-20T11:02:05.511390+00:00","company_name":"","ticker":null,"filing_date":""},{"id":40602,"accession_number":"0001437749-26-032969","item_number":"8.01","item_title":"Other Events","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The filing discloses a 1-for-20 reverse stock split effected through an amendment to the certificate of incorporation filed with Delaware on October 16, 2026. This is a governance event involving a capital structure modification. While reverse splits are typically routine administrative matters, this one is material because it substantially reduces outstanding shares from ~20.9 million to ~1.05 million and affects per-share metrics across multiple reporting periods, which would impact a reasonable investor's assessment of the company's capitalization and share structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-20T11:02:05.511390+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":40600,"accession_number":"0001437749-26-032969","item_number":"3.03","item_title":"Material Modifications of Rights of Security Holders.","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The filing discloses a 1-for-20 reverse stock split of Moleculin's common stock, effective October 20, 2026, which materially modifies the rights and economic interests of security holders by consolidating shares and reducing outstanding shares from approximately 20.9 million to 1.05 million. While reverse splits are governance-related capital structure events, they do not fit the specific named categories (exec appointment/departure, compensation, M\u0026A, etc.) and are best classified as governance_other. The event is material because it fundamentally alters the per-share economics and voting power of existing shareholders.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-20T11:02:05.511390+00:00","company_name":"Moleculin Biotech, Inc.","ticker":"MBRX","filing_date":"2026-10-20"},{"id":40601,"accession_number":"0001437749-26-032969","item_number":"5.03","item_title":"Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"This disclosure reports stockholder approval and board implementation of a 1-for-20 reverse stock split, effected through an amendment to the certificate of incorporation filed with Delaware. While reverse stock splits are governance/capital structure matters, they are routine corporate actions that do not fit the specific governance categories (exec_departure, exec_appointment, exec_compensation, shareholder_vote_results). The event is material because it materially alters the share structure and trading characteristics of the company's common stock, affecting all shareholders' holdings and the company's market capitalization presentation.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-20T11:02:05.511390+00:00","company_name":"Moleculin Biotech, Inc.","ticker":"MBRX","filing_date":"2026-10-20"},{"id":40602,"accession_number":"0001437749-26-032969","item_number":"8.01","item_title":"Other Events","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The filing discloses a 1-for-20 reverse stock split effected through an amendment to the certificate of incorporation filed with Delaware on October 16, 2026. This is a governance event involving a capital structure modification. While reverse splits are typically routine administrative matters, this one is material because it substantially reduces outstanding shares from ~20.9 million to ~1.05 million and affects per-share metrics across multiple reporting periods, which would impact a reasonable investor's assessment of the company's capitalization and share structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-20T11:02:05.511390+00:00","company_name":"Moleculin Biotech, Inc.","ticker":"MBRX","filing_date":"2026-10-20"}]}