{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-21-112921","form_type":"8-K","ticker":"SPOK","cik":"0001289945","company_name":"Spok Holdings, Inc","filed_at":"2021-09-03T23:59:59+00:00","discovered_at":"2026-05-14T18:04:17.528899+00:00","generated_at":"2026-06-29T05:45:18.109088+00:00","sec_items":["1.01","3.03","5.03","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.8,"calibrated_materiality_score":0.8,"confidence":"high","headline":"Spok announces strategic alternatives review; adopts limited-duration shareholder rights plan","bullets":["Board initiated strategic review after receiving multiple private expressions of interest to acquire the company.","Acacia Research/Starboard Value accumulated >5% of SPOK stock; Board invited them to participate equally.","Adopted limited-duration poison pill effective immediately; triggers at 10% (20% passive) ownership, expires Aug 31, 2022.","Rights plan includes shareholder-friendly feature: allows special meeting to exempt a qualifying offer.","No assurance that review will result in a sale or transaction."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-21-112921","json":"https://secwatch.observer/filing/0001104659-21-112921.json","markdown":"https://secwatch.observer/filing/0001104659-21-112921.md","text":"https://secwatch.observer/filing/0001104659-21-112921.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1289945/000110465921112921/0001104659-21-112921-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1289945/000110465921112921/tm2126921d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T05:45:18.109088+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"}