secwatch.observer — SEC 8-K summary
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Issuer:     Tenable Holdings, Inc. (TENB)
CIK:        0001660280
Form:       8-K
Filed at:   2026-10-06T13:07:23+00:00
Accession:  0001660280-26-000042
Event type: leadership
Sentiment:  neutral
Materiality: 0.30
Item codes: 5.02, 7.01, 9.01
LLM model:  deepseek-v4.1-flash:cloud@v2

Tenable appoints ex-Microsoft EVP and AWS veteran Charlie Bell to board
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- 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.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1660280/000166028026000042/0001660280-26-000042-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1660280/000166028026000042/tenb-20261005.htm
  HTML page:      https://secwatch.observer/filing/0001660280-26-000042

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