Tenable (TENB) CEO Mark Thurmond Receives Awards; Shares Withheld

What Happened Mark C. Thurmond, CEO of Tenable Holdings (TENB), had multiple restricted stock units / performance RSUs convert to common shares on 2026-08-24. A total of 25,369 shares were issued upon conversion/vesting. To satisfy tax withholding obligations, the issuer withheld 12,268 of those shares at an effective price of $33.94 per share, resulting in tax withholding proceeds of approximately $416,375. These filings reflect vesting/conversion transactions (transaction code M) and share withholding for tax liability (transaction code F).

Key Details

• Transaction date: August 24, 2026; Form 4 filed August 25, 2026 (timely).
• Shares issued on conversion/vesting: 25,369 total (broken into multiple conversion line items).
• Shares withheld for taxes: 12,268 shares at $33.94 each; withholding amount ≈ $416,375.
• Net new shares retained by Thurmond (approx.): 13,101 shares (25,369 issued − 12,268 withheld).
• Footnotes indicate these were RSUs/PRSUs (F1–F8). F1 clarifies withholding is to satisfy tax obligations and “does not represent a sale.” Other footnotes describe PRSU payout certifications and standard multi-year vesting schedules.
• Filing shows conversion/settlement (derivative exercise/vesting) and tax withholding — not open-market selling or a 10b5-1 plan.

Context This was a net settlement of vested restricted stock units / performance RSUs: shares were issued upon vesting and a portion withheld by the company to cover taxes. That withholding is routine and should not be interpreted as an open-market sale by the insider. The filing does not disclose total shares owned by Thurmond after these transactions in the provided excerpt.