ARDELYX, INC. 4

President & CEO Michael Raab sold an aggregate 58,574 shares of Ardelyx, Inc. common stock at about $3.8569 per share in automatic tax-withholding sales tied to RSU vesting.

On August 21, 2026, Ardelyx, Inc. President & CEO Michael Raab effected multiple open-market sales of common stock pursuant to an automatic sell-to-cover arrangement tied to vesting restricted stock units, with sales of 15,009, 15,976, 8,411, and 19,178 shares at a weighted average price of approximately $3.8569 per share, solely to cover withholding taxes due on RSU vesting. These transactions, executed over a price range of $3.648 to $3.984, reduced his direct holdings but are characterized by the issuer as routine tax-related sales rather than discretionary portfolio moves. Following the transactions, Raab continued to hold over 1.6 million shares directly (through the Michael G. Raab Living Trust) and additional shares indirectly through family trusts for the benefit of his children.

Filing Facts

CIK

1437402

Ticker

ARDX

Form

4

Source Type

fda

Accession

0001321402-26-000019

Alert Tier

5