iRhythm Holdings, Inc. SEC Filings

Artisan Partners Asset Management Inc., together with related entities, reports passive ownership of 1,660,307 common shares of iRhythm Holdings, Inc. This represents 5.1% of the outstanding common shares, based on 32,862,408 shares outstanding as of April 23, 2026. The group reports no sole voting or dispositive power over the shares. Instead, it has shared voting power over 1,529,086 shares and shared dispositive power over 1,660,307 shares.

The shares are held by Artisan Partners Limited Partnership, an investment adviser registered under section 203 of the Investment Advisers Act of 1940, on behalf of its discretionary clients. Those clients, rather than the Artisan entities, are entitled to dividends and sale proceeds, and to the knowledge of the filers, no individual client has an economic interest in more than 5% of iRhythm’s common shares.

iRhythm Holdings, Inc. reported a Board-level change in its audit oversight. On August 11, 2026, director Brian Yoor informed the company of his decision to resign from the Board of Directors and as a member and chair of the Audit Committee, effective August 12, 2026. The company states that his resignation is for personal reasons and is not based on any disagreement regarding operations, policies or practices. The Board has appointed existing director and Audit Committee member Karen McGinnis as the new chair of the Audit Committee, effective August 12, 2026. The report is signed by Chief Financial Officer Daniel Wilson on August 13, 2026.

iRhythm Holdings, Inc. reports that President and CEO Quentin S. Blackford had 48,534 shares of common stock credited to him upon the Compensation & Human Capital Management Committee’s determination that performance conditions for previously granted performance RSUs were met on August 7, 2026. On August 10, 2026, he sold 26,859 shares of common stock at $124.6514 per share to cover tax withholding and remittance obligations related to the vesting of those performance RSUs.

iRhythm Holdings, Inc. executive Patrick Michael Murphy, the company’s CBO and CLO, reported two equity transactions in common stock. On August 7, 2023 performance RSUs granted to him resulted in an acquisition of 13,589 shares upon determination that performance conditions were met. On August 10, 2026 he sold 7,093 shares of common stock at an average price of $124.6519 per share to cover tax withholding and remittance obligations related to the vesting of those performance RSUs. The Rule 10b5-1 trading plan box was not checked, indicating these transactions were not reported as occurring under a pre-arranged trading plan.

iRhythm Holdings, Inc. reported insider equity activity by Chief Commercial & Product Officer Chad Patterson. On August 7, 2026, he acquired 13,589 shares of common stock at no cost upon vesting of performance RSUs granted August 7, 2023. On August 10, 2026, he sold 7,093 shares of common stock at $124.6539 per share; the company states these shares were sold solely to cover tax withholding and remittance obligations related to the RSU vesting.

iRhythm Holdings, Inc. executive Sumi Shrishrimal, EVP and Chief Risk Officer, reported two common stock transactions. On August 7, 2026, she acquired 9,706 shares at no cost upon the Compensation & Human Capital Management Committee’s determination that performance conditions for previously granted performance RSUs were met. On August 10, 2026, 5,372 shares were sold at $124.6539 per share to cover tax withholding and remittance obligations related to that vesting.

iRhythm Holdings, Inc. reported insider equity activity by Chief Medical/Scientific Officer and EVP Advanced Technology Minang Turakhia. On August 7, 2026, he acquired 13,589 shares of common stock at $0.00 per share upon the Compensation & Human Capital Management Committee determining that performance conditions were met for previously granted performance RSUs from August 7, 2023. On August 10, 2026, he sold 7,093 shares of common stock at an average price of $124.6512 per share; these shares were sold to cover tax withholding and remittance obligations related to the vesting of the performance RSUs.

iRhythm Holdings, Inc. agreed to acquire Vital Connect, Inc. through a merger in which a wholly owned subsidiary will combine with Vital Connect, which will become an indirect wholly owned subsidiary. Eligible Target equity holders are to receive $237.5 million in cash plus $50 million in iRhythm common stock, subject to customary adjustments, with a portion of the consideration held in escrow. The number of iRhythm shares issued will be based on the 30-day volume‑weighted average trading price prior to signing.

The acquisition is expected to close by the end of 2026, subject to Target stockholder approval, expiration or termination of the Hart‑Scott‑Rodino waiting period, and other conditions. iRhythm agreed to a $9.0 million reverse termination fee payable to the Target if the deal ends in specified antitrust‑related circumstances and entered into an Interim Funding Agreement to provide an initial $10.0 million, with additional funding up to $30.0 million, to support Vital Connect’s operations before closing. The stock portion of the consideration will be issued in a private offering exempt from Securities Act registration under Section 4(a)(2) and/or Regulation D.