Tenable (TENB) Rule 144 Notice: 15,000 Shares to Be Sold on NASDAQ

Rhea-AI Filing Summary

Tenable Holdings, Inc. (TENB) reported a Rule 144 notice to sell restricted/common stock. The filing discloses a proposed sale of 15,000 common shares through Rockefeller Capital Management with an aggregate market value of $462,040.42, scheduled approximately for 09/09/2025 on NASDAQ. The shares were originally acquired in the company's 07/26/2018 initial public offering and were paid for in cash/check. The filing also lists a recent sale by related parties of 4,622 shares on 09/04/2025 generating $139,114.21 in gross proceeds. The filer certifies no undisclosed material adverse information is known.

Positive

• Disclosure complies with Rule 144, providing broker, share count, market value, and sale timing
• Sale size is small relative to reported outstanding shares (15,000 vs 121,100,000), suggesting limited market impact

Negative

• Insider/affiliate liquidity activity can be interpreted by some investors as a desire to monetize holdings
• Recent related-party sale of 4,622 shares for $139,114.21 may prompt questions about ongoing insider selling

Insights

Securities Compliance Analyst

TL;DR: Routine Rule 144 notice for an insider/affiliate sale; procedural disclosure, not a corporate operational event.

The filing documents a standard Rule 144 notice for the sale of restricted/common shares previously acquired in the IPO. Key elements—number of shares (15,000), broker (Rockefeller Capital Management), market value ($462,040.42), and exchange (NASDAQ)—are provided and align with disclosure requirements for affiliated holders seeking to resell restricted securities. The inclusion of a recent affiliated sale (4,622 shares for $139,114.21) provides additional context on recent liquidity activity by related parties. This is a compliance-driven disclosure and does not report company financials or operational changes.

Equity Analyst

TL;DR: Sale size is small relative to typical public float; likely limited market impact but signals insider liquidity.

The proposed 15,000-share sale with a stated market value of $462k is modest relative to the reported outstanding shares figure (121,100,000), implying a fractional portion of the float. The filing confirms original acquisition at IPO and immediate payment method, indicating these are legacy restricted shares being monetized. While not a material corporate development, investors may view such filings as routine insider liquidity events rather than indicators of negative company developments.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Rockefeller Capital Management Two Embarcadero Center Suite 2320 San Francisco CA 94111	15000	462040.42	121100000	09/09/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	07/26/2018	Initial Public Offering	TENB			15000	07/26/2018	cash/check

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Rosemary and A Brooke Seawell 6100 Merriweather DR Columbia ME 21044	TENB	09/04/2025	4622	139114.21

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the TENB Form 144 disclose?

The notice discloses a proposed sale of 15,000 common shares via Rockefeller Capital Management with an aggregate market value of $462,040.42, to be sold on NASDAQ around 09/09/2025.

When and how were the shares being sold originally acquired?

The shares were acquired in the initial public offering on 07/26/2018 and paid for by cash/check.

Has any related sale of TENB shares occurred recently?

Yes. The filing lists a related-party sale of 4,622 shares on 09/04/2025, producing $139,114.21 in gross proceeds.

Who is handling the proposed sale of TENB shares?

The broker named in the filing is Rockefeller Capital Management located at Two Embarcadero Center Suite 2320, San Francisco, CA.

Does the filing indicate undisclosed material information about TENB?

The signer represents that they do not know any material adverse information about the issuer that has not been publicly disclosed.