Company: TENB
Filing Date: 2025-02-24
Form Type: S-8
Source: 0001660280-25-000035
Chunk: 0

Company: Tenable Holdings, Inc.
Filing Date: 2025-02-24
Form: S-8
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
#### __________________________

#### FORM S-8

### REGISTRATION STATEMENT
<div align='center'>UNDER

THE SECURITIES ACT OF 1933</div>

#### __________________

#### ________

#### TENABLE HOLDINGS, INC.
<div align='center'>(Exact name of registrant as specified in its charter)</div>

#### __________________

#### ________

| Delaware                                                       |     | 47-5580846                             |
| (State or other jurisdiction of incorporation or organization) |     | -I.R.S. Employer Identification Number |

#### 6100 Merriweather Drive

#### Columbia, Maryland, 21044
<div align='center'>(410) 872-0555

(Address of principal executive offices, including zip code)</div>

#### Tenable Holdings, Inc. 2018 Equity Incentive Plan
<div align='center'>Tenable Holdings, Inc. 2018 Employee Stock Purchase Plan

(Full titles of the plans)</div>

#### __________________

#### ________

#### Stephen A. Vintz

### Co-Chief Executive Officer and Chief Financial Officer

#### Tenable Holdings, Inc.

#### 6100 Merriweather Drive

#### Columbia, Maryland 21044
<div align='center'>(410) 872-0555

(Name and address of agent for service) (Telephone number, including area code, of agent for service)</div>

| Copies to:                  |     |                          |
| Jon C. Avina                |     | Michelle VonderHaar      |
| Madison A. Jones            |     | Tenable Holdings, Inc.   |
| Cooley LLP                  |     | 6100 Merriweather Drive  |
| 3175 Hanover Street         |     | Columbia, Maryland 21044 |
| Palo Alto, California 94304 |     |                          |

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

| Large accelerated filer                                                                                                                                                                                                                                     |     | ý |     | Accelerated filer         |     | o |
| Non-accelerated