{"schema_version":"secwatch.filing_event.v1","accession":"0001660280-26-000042","form_type":"8-K","ticker":"TENB","cik":"0001660280","company_name":"Tenable Holdings, Inc.","filed_at":"2026-10-06T13:07:23+00:00","discovered_at":"2026-10-06T13:08:00.248549+00:00","generated_at":"2026-10-12T16:30:23.343510+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Tenable appoints ex-Microsoft EVP and AWS veteran Charlie Bell to board","bullets":["Charles \"Charlie\" Bell, 68, appointed a director effective October 5, 2026; board size increased from 10 to 11; term expires at the 2027 Annual Meeting.","Bell is EVP, Engineer at Microsoft since February 2026, after serving as EVP Security, Compliance, Identity and Management from September 2021 to February 2026.","He spent more than two decades at Amazon, including as Senior Vice President of Amazon Web Services, and has served on Twilio's board since March 2023.","Joins the board's Cybersecurity Risk Management Committee; granted 10,386 RSUs vesting in three equal annual installments.","Prorated 2026 pay: $35,000 board service retainer plus $5,000 Cybersecurity Committee member retainer; no related-party transactions disclosed."],"urls":{"canonical":"https://secwatch.observer/filing/0001660280-26-000042","json":"https://secwatch.observer/filing/0001660280-26-000042.json","markdown":"https://secwatch.observer/filing/0001660280-26-000042.md","text":"https://secwatch.observer/filing/0001660280-26-000042.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1660280/000166028026000042/0001660280-26-000042-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1660280/000166028026000042/tenb-20261005.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-12T16:30:23.343510+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":"4e4f1c91a2","claim":"Charles Bell was appointed as director at Tenable Holdings, Inc..","evidence_excerpt":"approved an increase in the size of the Board from 10 to 11 directors, and appointed Charles Bell to serve as a director of the Company, effective October 5, 2026.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1660280/000166028026000042/0001660280-26-000042-index.htm","confidence":0.98,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}