Tenable Holdings SEC Filings

Reporting person Seawell A. Brooke, a director of Tenable Holdings, Inc. (TENB), reported transactions dated 09/04/2025. The filing shows a sale/disposition of 4,622 shares of common stock at $30.12 per share (transaction code S) and additional dispositions totaling 9,230 shares and 15,000 shares reported as indirectly owned in trusts. Following the reported transactions, the filing lists 15,000 shares beneficially owned by an indirect trust. The explanatory notes state 4,622 shares were transferred on July 17, 2025, without consideration to the Rosemary and A. Brooke Seawell Revocable Trust; the reporting person is trustee of that trust and of the Alexander Brooke Seawell Revocable Trust. The Form 4 was signed by an attorney-in-fact on 09/05/2025.

Tenable Holdings, Inc. (TENB) Form 144 notifies the SEC of a proposed sale of 4,622 shares of common stock, with an aggregate market value of $139,193.38, to be effected approximately on 09/04/2025 through Fidelity Brokerage Services LLC on NASDAQ. The filing reports 121,094,958 shares outstanding. The shares were acquired via restricted stock vesting on 05/24/2023 and 05/22/2024 (2,600 shares noted for the 2024 vesting) and were received as compensation. The filer reports no securities sold in the past three months. Several issuer and filer contact fields are blank in the provided content and the filer did not state a relationship to the issuer in the portions shown.

Mark C. Thurmond, a Director and Co-Chief Executive Officer of Tenable Holdings, Inc. (TENB), reported a non-discretionary sale of 2,541 shares of common stock on 08/26/2025 at a price of $29.84 per share. The filing states this sale was an automatic "sell-to-cover" to satisfy tax withholding obligations arising from the vesting of restricted stock units, not a voluntary trade. After the transaction the reporting person beneficially owned 105,001 shares. The Form 4 was submitted by an attorney-in-fact and includes no derivative transactions or other dispositions.

Stephen A. Vintz, Co-Chief Executive Officer and director of Tenable Holdings, Inc. (TENB), reported a non-discretionary sale of company stock tied to RSU tax withholding. The Form 4 shows a sell-to-cover transaction on 08/26/2025 disposing of 3,464 shares at $29.84 per share to satisfy tax withholding obligations upon vesting of restricted stock units. After the automatic sale, the reporting person beneficially owned 362,679 shares. The filing indicates the sale was required to cover taxes and was not a voluntary trade by the reporting person.

Tenable Holdings insider sale to satisfy tax withholding after RSU vesting Anschutz Barron, listed as Principal Accounting Officer of Tenable Holdings (TENB), reported the automatic sale of 670 shares of common stock on 08/26/2025 at a price of $29.84 per share. The filing states the sale was a "sell to cover" executed to satisfy tax withholding obligations tied to restricted stock unit vesting and was not a discretionary trade. After the transaction Anschutz Barron beneficially owned 60,365 shares, held directly. The Form 4 was signed by an attorney-in-fact on 08/27/2025.

Tenable Holdings insider activity: This Form 4 shows Principal Accounting Officer Anschutz Barron received multiple restricted stock unit (RSU) vestings and completed a small automatic sale to cover tax withholding. On 08/22/2025 and 08/25/2025 the reporting person was granted/received RSUs that converted into common stock at $0 cost, adding shares to beneficial ownership. On 08/25/2025 a sell-to-cover disposition of 1,261 shares occurred at $30.25 per share to satisfy tax withholding, noted as an automatic transaction rather than a discretionary sale. Following the reported transactions the filings show beneficial ownership totals in the range of ~59,645 to 61,035 shares across line items, reported as direct ownership.

Insider transactions at Tenable Holdings (TENB): Stephen A. Vintz, Co-Chief Executive Officer and director, reported multiple automatic acquisitions and one sale tied to vesting of restricted stock units. On 08/22/2025 and 08/25/2025 he was credited with a series of RSU and performance RSU vestings totaling incremental additions to his beneficial ownership, bringing holdings to 366,143 shares before an automatic tax-withholding sale. On 08/25/2025 he reported a sell-to-cover transaction of 29,196 shares at $30.25 per share to satisfy tax withholding obligations related to RSU vesting. All holdings are reported as direct beneficial ownership.

Tenable Holdings insider report: Mark C. Thurmond, Co-Chief Executive Officer and director, filed a Form 4 disclosing multiple automatic acquisitions and a single taxable sale. On 08/22/2025 and 08/25/2025 he was credited with a series of vested RSUs and PRSUs totaling multiple grant-year vesting events, increasing his direct beneficial holdings from 73,889 shares to 107,542 shares after the 08/25/2025 transactions. On 08/25/2025 he recorded a sell-to-cover disposition of 28,500 shares at $30.25 per share to satisfy tax-withholding obligations related to RSU vesting. All acquisitions show $0 purchase price (vesting) and ownership is reported as direct.

Tenable Holdings, Inc. (TENB) Form 144 notice reports a proposed sale of 3,464 common shares by a person for whose account the securities were acquired through restricted stock vesting on 08/25/2025 and paid as compensation the same day. The shares have an aggregate market value of $103,381.00 and the filing lists 121,094,958 shares outstanding for the class. The broker identified is Fidelity Brokerage Services LLC and the planned sale date is 08/26/2025 on NASDAQ. The filer also disclosed two prior sales in the past three months totaling 32,582 shares with gross proceeds of $993,148.68.