A Form 4 filed on August 11, 2026 discloses that Quentin S. Blackford, President and CEO of iRhythm Holdings, Inc. (NASDAQ:IRTC), acquired 48,534 shares of common stock upon vesting of performance restricted stock units and subsequently sold 26,859 shares to cover tax withholding obligations.

Key Highlights

  • Shares acquired: 48,534 shares of common stock were acquired on August 7, 2026 at $0, upon satisfaction of performance conditions tied to RSUs granted on August 7, 2023.
  • Shares sold: 26,859 shares were sold on August 10, 2026 at a price of $124.6514 per share to cover tax withholding and remittance obligations.
  • Post-transaction ownership: Blackford directly beneficially owned 226,008 shares of common stock following the reported transactions.
  • Performance determination: The Compensation and Human Capital Management Committee of the Board of Directors determined that the performance conditions for the RSUs were met.
  • Reporting person role: Blackford is identified as both a Director and President and CEO of iRhythm Holdings, Inc.

iRhythm CEO's Performance RSU Vesting and Tax-Related Share Sale Details

According to the filing, Quentin S. Blackford, President and CEO and a Director of iRhythm Holdings, Inc., reported two transactions in common stock during August 2026. On August 7, 2026, Blackford acquired 48,534 shares at $0 per share. The filing states these shares represent the acquisition upon the Compensation and Human Capital Management Committee of the Board of Directors determining that performance conditions were met with respect to performance restricted stock units granted to Blackford on August 7, 2023.

Three days later, on August 10, 2026, the filing discloses that Blackford sold 26,859 shares at a price of $124.6514 per share. The filing notes that "these shares were sold to cover tax withholding and remittance obligations in connection with the vesting of performance RSUs." Both transactions were reported as direct ownership. Prior to the sale, Blackford held 252,867 shares directly following the acquisition, and after the sale, direct beneficial ownership stood at 226,008 shares.

The Form 4 was signed by Marc Rosenbaum as attorney-in-fact and filed on August 11, 2026. The filing does not indicate that either transaction was made pursuant to a Rule 10b5-1 trading plan, as the corresponding checkbox on the form was not checked.

What Was Disclosed

The filing reports a performance RSU vesting event for iRhythm Holdings CEO Quentin S. Blackford, resulting in the acquisition of 48,534 shares on August 7, 2026, followed by the sale of 26,859 shares on August 10, 2026 at $124.6514 per share solely for tax withholding purposes, leaving him with 226,008 directly held shares.