{"schema_version":"secwatch.filing_event.v1","accession":"0001641172-25-015067","form_type":"8-K","ticker":null,"cik":"0001811623","company_name":"PaxMedica, Inc.","filed_at":"2025-06-13T23:59:59+00:00","discovered_at":"2026-05-14T18:02:49.824165+00:00","generated_at":"2026-05-19T08:52:50.685853+00:00","sec_items":["5.03","8.01","9.01"],"event_type":"other_material","sentiment":"negative","materiality_score":1.0,"calibrated_materiality_score":1.0,"confidence":"high","headline":"PaxMedica cancels all outstanding shares, deregisters with SEC","bullets":["Company changed name to Kuvatris Therapeutics; all outstanding shares declared null, void, and worthless.","Shares held by DTC and record shareholders ordered cancelled; beneficial shareholders left with worthless equity.","Company to file Form 15-12g terminating SEC registration, ending all reporting obligations under Exchange Act.","CEO Howard Weisman executed name change on June 6, 2025; share cancellation letter sent to DTC on May 20."],"urls":{"canonical":"https://secwatch.observer/filing/0001641172-25-015067","json":"https://secwatch.observer/filing/0001641172-25-015067.json","markdown":"https://secwatch.observer/filing/0001641172-25-015067.md","text":"https://secwatch.observer/filing/0001641172-25-015067.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1811623/000164117225015067/0001641172-25-015067-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1811623/000164117225015067/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-19T08:52:50.685853+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"d68b1ce54cb25bb969ef61df3e5f235af6ed94ea","claim":"PaxMedica, Inc.: Certificate of amendment changing company name from PaxMedica, Inc. to Kuvatris Therapeutics, Inc (effective 2025-06-06).","evidence_excerpt":"On June 6, 2025, Howard J. Weisman, chief executive officer of PaxMedica, Inc., a Delaware corporation (the “Company”), executed a certificate of amendment of the certificate of incorporation of the Company, changing the Company’s name from PaxMedica, Inc. to Kuvatris Therapeutics, Inc.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1811623/000164117225015067/0001641172-25-015067-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"},{"label":"Effective","value":"2025-06-06"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}