Company: TENB
Filing Date: 2025-04-03
Form Type: DEF 14A
Source: 0001660280-25-000058
Chunk: 0

Company: Tenable Holdings, Inc.
Filing Date: 2025-04-03
Form: DEF 14A
Chunk 0
---
#### SCHEDULE 14A INFORMATION
<div align='center'>Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934</div>

Filed by the Registrant ý

Filed by a Party other than the Registrant ¨

Check the appropriate box:

¨ Preliminary Proxy Statement

¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

ý Definitive Proxy Statement

¨ Definitive Additional Materials

¨ Soliciting Material Pursuant to § 240.14a-12

#### Tenable Holdings, Inc.
<div align='center'>(Name of Registrant as Specified In Its Charter)</div>

Payment of Filing Fee (Check the appropriate box)

ý No fee required.

¨ Fee paid previously with preliminary materials.

¨ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

<div align='center'>1

2</div>

| NOTICE OF ANNUAL MEETING OF STOCKHOLDERS |

| WHEN                    
 Wednesday, May 14, 2025 |     | WHERE                          
 Via Webcast                    |     | RECORD DATE                                                                                                                  
 March 17, 2025                                                                                                               |
|:------------------------|:----|:-------------------------------|:----|:-----------------------------------------------------------------------------------------------------------------------------|
| 1:00 pm Eastern Time    |     | https://www.proxydocs.com/TENB |     | Only stockholders of record at the close of business on that date may vote at the Annual Meeting or any adjournment thereof. |

| ITEMS OF BUSINESS                                                                                                                                                                                        
 Electing the Board of Directors’ nominees Linda Zecher Higgins and Niloofar Razi Howe to the Board of Directors to hold office until the 2028 Annual Meeting of Stockholders.                            
 Ratifying the selection by the Audit Committee of the Board of Directors of Ernst & Young LLP as the independent registered public accounting firm of the Company for the year ending December 31, 2025. |     | BOARD VOTING RECOMMENDATION |     | FOReach director nominee 
 FOR                      |     | PAGE REFERENCE 
             16 
             32 |
|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:----|:----------------------------|:----|:-------------------------|:----|---------------:|
| Approving, on a non-binding advisory basis, the compensation of the Company's Named Executive Officers as disclosed in this proxy