Company: TENB
Filing Date: 2025-04-03
Form Type: DEF 14A
Source: 0001660280-25-000058
Chunk: 97

Company: Tenable Holdings, Inc.
Filing Date: 2025-04-03
Form: DEF 14A
Chunk 97
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 Direct your written request to Tenable Holdings, Inc., Attn: Corporate Secretary, 6100 Merriweather Drive, 12th Floor, Columbia, Maryland 21044. Stockholders who currently receive multiple copies of the Notices of Internet Availability of Proxy Materials at their addresses and would like to request “householding” of their communications should contact their brokers.

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### OTHER MATTERS
The Board of Directors knows of no other matters that will be presented for consideration at the Annual Meeting. If any other matters are properly brought before the meeting, it is the intention of the persons named in the accompanying proxy to vote on such matters in accordance with their best judgment.

| By Order of the Board of Directors,         |     |               |
| Michelle VonderHaar                         |     |               |
| Chief Legal Officer and Corporate Secretary |     |               |
| Dated:                                      |     | April 3, 2025 |

A copy of the Company’s Annual Report to the Securities and Exchange Commission on Form 10-K for the year ended December 31, 2024 is available without charge upon written request to Tenable Holdings, Inc., Attention: Corporate Secretary, Tenable Holdings, Inc. , 6100 Merriweather Drive, 12th Floor, Columbia, Maryland 21044 .

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### APPENDIX

### RECONCILIATION OF NON-GAAP MEASURES
In this proxy statement, we discuss certain operating metrics and non-GAAP financial measures, as described below, which we think are important to better understand and evaluate our core operating and financial performance. These non-GAAP financial measures, which may be different than similarly titled measures used by other companies, are presented to enhance the overall understanding of our financial performance and should not be considered a substitute for, or superior to, the financial information prepared and presented in accordance with GAAP included in our Annual Report on Form 10-K. We believe that these operating metrics and non-GAAP financial measures provide useful information about our operating and financial performance, enhance the overall understanding of our past performance and future prospects and allow for greater transparency with respect to important metrics used by management for financial and operational decision-making.

#### Calculated Current Billings
We define calculated current billings, a non-GAAP financial measure, as revenue recognized in a period plus the change in current deferred revenue in the corresponding period. We believe that calculated current billings is a key metric to measure our periodic