---
schema_version: "secwatch.filing_event.v1"
accession: "0001660280-26-000039"
form_type: "8-K"
ticker: "TENB"
cik: "0001660280"
company_name: "Tenable Holdings, Inc."
filed_at: "2026-09-15T20:23:12+00:00"
generated_at: "2026-09-15T20:25:20.284049+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Tenable closes $800M 0.25% convertible notes due 2031; buys back $170.5M stock

## Summary
- Closed $800M aggregate 0.25% Convertible Senior Notes due 2031, including full $75M option exercise; net proceeds ~$778.8M.
- Initial conversion price ~$44.84/share (40% premium to $32.03 close on 9/10/26); capped call cap price $64.06/share.
- Used ~$64.1M for capped calls, repurchased ~$170.5M common stock, repaid term loans; terminated credit agreement 9/15/26.
- Notes mature 9/15/31, interest semi-annual; conversion rate initially 22.3005 shares per $1,000 principal.
- Remaining proceeds for general corporate purposes incl. share repurchases, acquisitions; Notes unregistered Rule 144A.

## SEC filing metadata
- accession: 0001660280-26-000039
- form_type: 8-K
- ticker: TENB
- cik: 0001660280
- company_name: Tenable Holdings, Inc.
- filed_at: 2026-09-15T20:23:12+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 1.02, 2.03, 3.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1660280/000166028026000039/0001660280-26-000039-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1660280/000166028026000039/tenb-20260910.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001660280-26-000039
- JSON: https://secwatch.observer/filing/0001660280-26-000039.json
- Plain text: https://secwatch.observer/filing/0001660280-26-000039.txt

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