Ardelyx Chief Commercial Officer Eric Foster Sells 7,998 Shares at $6.2675

Eric D. Foster, Chief Commercial Officer of Ardelyx, Inc., filed a Form 4 reporting the sale of 7,998 shares of common stock on May 21, 2026, at a price of $6.2675 per share. The transactions occurred in three separate sales: 3,166 shares, 2,427 shares, and 2,405 shares. Following these sales, Foster's remaining ownership decreased to 417,972 shares. According to the filing footnote, these sales were automatic sell-to-cover transactions required by the terms of restricted stock unit (RSU) awards to cover applicable withholding taxes upon vesting. The filing was signed by Michael Raab as attorney-in-fact for Eric D. Foster on May 22, 2026.