{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-180763","form_type":"8-K","ticker":null,"cik":"0001496323","company_name":"IGM Biosciences, Inc.","filed_at":"2025-08-14T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.118816+00:00","generated_at":"2026-05-17T13:06:47.733233+00:00","sec_items":["2.01","3.01","3.03","5.01","5.02","5.03","9.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.85,"calibrated_materiality_score":0.85,"confidence":"high","headline":"IGM Biosciences acquired by Concentra Biosciences; delisted from Nasdaq","bullets":["Tender offer closed August 13, 2025; 77.53% of shares tendered, all conditions satisfied.","Each share exchanged for $1.247 cash plus one contingent value right (CVR).","Board resigned; Kevin Tang named sole director of surviving corporation.","Trading of IGMS common stock suspended; delisting and deregistration initiated."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-180763","json":"https://secwatch.observer/filing/0001193125-25-180763.json","markdown":"https://secwatch.observer/filing/0001193125-25-180763.md","text":"https://secwatch.observer/filing/0001193125-25-180763.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1496323/000119312525180763/0001193125-25-180763-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1496323/000119312525180763/d82965d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T13:06:47.733233+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":"4f6106ad675578933794bae69102e9a84ea91141","claim":"IGM Biosciences, Inc.: Certificate of incorporation amended and restated in its entirety.","evidence_excerpt":"the Company’s certificate of incorporation and bylaws were amended and restated in their entirety","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1496323/000119312525180763/0001193125-25-180763-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"}],"fact_type":"governance_change"},{"claim_id":"67a798a3b3d02f95c8a76680f4516cf931678799","claim":"IGM Biosciences, Inc.: Bylaws amended and restated in their entirety.","evidence_excerpt":"the Company’s certificate of incorporation and bylaws were amended and restated in their entirety","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1496323/000119312525180763/0001193125-25-180763-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"bylaw amendment"}],"fact_type":"governance_change"},{"claim_id":"7b9c3cb85acf50a97be54f92b42ea371c4d2ae60","claim":"IGM Biosciences, Inc. underwent a change of control involving Concentra Biosciences, LLC for $1.247 in cash per Share plus one non-transferable contractual contingent value right per Share (closed 2025-08-14).","evidence_excerpt":"Parent completed a tender offer to purchase all of the Company’s outstanding shares of common stock, par value $0.01 per share (the “Common Stock” and shares of Common Stock, “Shares”), in exchange for (i) $1.247 in cash per Share (the “Cash Amount”); plus (ii) one non-transferable contractual contingent value right per Share","evidence_source":"SEC 8-K Item 2.01/5.01","evidence_url":"https://www.sec.gov/Archives/edgar/data/1496323/000119312525180763/0001193125-25-180763-index.htm","confidence":0.9,"family_label":"M&A Transactions","details":[{"label":"Action","value":"change of control"},{"label":"Counterparty","value":"Concentra Biosciences, LLC"},{"label":"Consideration","value":"$1.247 in cash per Share plus one non-transferable contractual contingent value right per Share"},{"label":"Closing","value":"2025-08-14"}],"fact_type":"ma_transaction"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}