Ardelyx Chief Business Officer Mike Kelliher Sells Shares for Tax Withholding

This Form 4 filing reports that Mike Kelliher, Chief Business Officer of Ardelyx, Inc., sold 7,248 shares of common stock on May 21, 2026, at a price of $6.2675 per share. The sales were conducted through an automatic sell-to-cover mechanism triggered by the vesting of restricted stock units (RSUs). According to the filing's footnote, the shares were sold solely to cover applicable withholding taxes as required by the terms of the initial RSU grant. Following these transactions, Kelliher's ownership decreased to 357,418 shares. The filing indicates these were routine transactions for tax purposes rather than discretionary sales by the officer. The transactions were reported by the company's attorney-in-fact on behalf of Kelliher.