{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-24-028715","form_type":"8-K","ticker":null,"cik":"0001442836","company_name":"Mersana Therapeutics, Inc.","filed_at":"2024-02-28T23:59:59+00:00","discovered_at":"2026-05-14T18:03:24.208276+00:00","generated_at":"2026-06-05T08:35:41.974871+00:00","sec_items":["1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Mersana Therapeutics enters $100M ATM sales agreement with TD Cowen","bullets":["Company entered Sales Agreement to sell up to $100M of common stock at-the-market through TD Cowen.","TD Cowen will receive up to 3.0% commission per share sold; no minimum obligation to sell shares.","Offering is under existing S-3 registration statement that became effective February 28, 2024.","Company may suspend or terminate the offering at any time upon notice to TD Cowen."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-24-028715","json":"https://secwatch.observer/filing/0001104659-24-028715.json","markdown":"https://secwatch.observer/filing/0001104659-24-028715.md","text":"https://secwatch.observer/filing/0001104659-24-028715.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1442836/000110465924028715/0001104659-24-028715-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1442836/000110465924028715/tm247340d5_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-05T08:35:41.974871+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":"e267b70861e950c46834c622f6038984f41095c7","claim":"Mersana Therapeutics, Inc. entered into Sales Agreement with Cowen and Company, LLC valued at up to $100,000,000 (effective 2024-02-28).","evidence_excerpt":"On February 28, 2024, Mersana Therapeutics, Inc., a Delaware corporation (the “Company”), entered into a Sales Agreement (the “Sales Agreement”) with Cowen and Company, LLC as agent (“TD Cowen”) pursuant to which the Company may issue and sell shares of its common stock, $0.0001 par value per share, having an aggregate offering price of up to $100,000,000","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1442836/000110465924028715/0001104659-24-028715-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"atm program"},{"label":"Counterparty","value":"Cowen and Company, LLC"},{"label":"Value","value":"up to $100,000,000"},{"label":"Effective","value":"2024-02-28"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}