{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-037738","form_type":"8-K","ticker":"MRK","cik":"0000310158","company_name":"Merck & Co., Inc.","filed_at":"2026-05-22T20:21:18+00:00","discovered_at":"2026-05-22T20:22:00.254918+00:00","generated_at":"2026-05-22T20:23:06.483318+00:00","sec_items":["8.01","9.01"],"event_type":"debt","sentiment":"neutral","materiality_score":0.55,"confidence":"high","headline":"Merck closes $6B multi-tranche debt offering with maturities from 2028 to 2056","bullets":["Issued $6B aggregate principal across seven tranches: floating rate notes due 2028 and fixed-rate notes at 4.300%-5.850% due 2028-2056.","Tranches include $1.5B 5.200% notes due 2036 and $1B 5.850% notes due 2056.","Offering closed May 22, 2026 via underwritten public offering under existing shelf registration.","Use of proceeds not disclosed; debt issuance adds to long-term balance sheet leverage."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-037738","json":"https://secwatch.observer/filing/0001628280-26-037738.json","markdown":"https://secwatch.observer/filing/0001628280-26-037738.md","text":"https://secwatch.observer/filing/0001628280-26-037738.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/310158/000162828026037738/0001628280-26-037738-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/310158/000162828026037738/mrk-20260522.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-22T20:23:06.483318+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}