Tenable Holdings, Inc.

10. Income Taxes

In the three months ended September 30, 2026, the benefit for income taxes included a $3.3 million discrete tax benefit associated with amending our 2024 federal return regarding a Base Erosion and Anti-Abuse Tax (BEAT) refund partially offset by $1.4 million of income taxes in foreign jurisdictions in which we conduct business and $1.4 million of discrete items primarily related to withholding taxes on sales to customers.

In the nine months ended September 30, 2026, the provision for income taxes included $4.2 million of income taxes in foreign jurisdictions in which we conduct business and $5.4 million of discrete items primarily related to withholding taxes on sales to customers partially offset by the $3.3 million discrete tax benefit associated with amending our 2024 federal return.

In connection with the pricing of the Convertible Senior Notes, the exercise of the overallotment option and the capped call transactions, we made a tax election to integrate the Convertible Senior Notes and the Capped Calls. This tax election makes the Capped Calls deductible for tax purposes over the term of the Convertible Senior Notes as original issue discount, resulting in a $19.4 million deferred tax asset, or a $1.1 million net deferred tax asset after valuation allowance, recognized through equity.

In the three months ended September 30, 2025, the provision for income taxes included $1.6 million of net tax benefits in foreign jurisdictions in which we conduct business and $2.2 million of discrete items primarily related to withholding taxes on sales to customers.

In the nine months ended September 30, 2025, the provision for income taxes included $3.5 million of income taxes in foreign jurisdictions in which we conduct business and $4.9 million of discrete items primarily related to withholding taxes on sales to customers.

Income tax in the three and nine months ended September 30, 2025 related to foreign jurisdictions was reduced by a $3.2 million interim intraperiod allocation, which was reversed in the three months ended December 31, 2025.