---
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"
generated_at: "2026-10-12T16:30:23.343510+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

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

## Summary
- 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.

## SEC filing metadata
- 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
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- 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

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001660280-26-000042
- JSON: https://secwatch.observer/filing/0001660280-26-000042.json
- Plain text: https://secwatch.observer/filing/0001660280-26-000042.txt

## Key facts
- Executive change
  Charles Bell was appointed as director at Tenable Holdings, Inc..
  - Action: appointed
  - Role: director
  source text: 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_url: https://www.sec.gov/Archives/edgar/data/1660280/000166028026000042/0001660280-26-000042-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.