ARDX SHAREHOLDER INVESTIGATION: Levi & Korsinsky Investigates Ardelyx, Inc. for Possible Securities Law Violations

NEW YORK CITY, NY / ACCESS Newswire / August 13, 2026 / Levi & Korsinsky notifies investors that it has commenced an investigation into Ardelyx, Inc. ("Ardelyx, Inc.") (NASDAQ:ARDX) concerning potential violations of the federal securities laws.

Ardelyx shares dropped 17.86% on August 7, 2026, closing at $4.00, after the Company cut its full-year 2026 IBSRELA revenue guidance to $350-$370 million from $410-$430 million.

The $410-$430 million IBSRELA range had been reiterated on the Company's Q1 2026 earnings call on April 30, 2026. On August 6, 2026, after the close, Ardelyx reduced the range by approximately $60 million at the midpoint, citing increased payer utilization-management processes -- additional step edits and more stringent prior authorizations -- that slowed new-patient starts. Management stated on the call that the extent of the payer restrictions "was not something that one would anticipate."

In the same release, Ardelyx withdrew its long-term $750 million revenue target for XPHOZAH. Q2 2026 product revenue was $118.1 million with EPS of approximately $(0.07). The investigation concerns whether Ardelyx may not have adequately disclosed the payer dynamics affecting IBSRELA.

If you suffered a loss on your Ardelyx, Inc. securities and would like to explore a potential recovery under the federal securities laws, Learn More About the Investigation or contact Joseph E. Levi, Esq. via email at [email protected] or call (212)363-7500 to speak to our team of experienced shareholder advocates.

WHY LEVI & KORSINSKY: Over the past 20 years, Levi & Korsinsky LLP has established itself as a nationally-recognized securities litigation firm that has secured hundreds of millions of dollars for aggrieved shareholders and built a track record of winning high-stakes cases. The firm has extensive expertise representing investors in complex securities litigation and a team of over 70 employees to serve our clients. For seven years in a row, Levi & Korsinsky has ranked in ISS Securities Class Action Services' Top 50 Report as one of the top securities litigation firms in the United States. Attorney Advertising. Prior results do not guarantee similar outcomes.

CONTACT:

Levi & Korsinsky, LLP

Joseph E. Levi, Esq.

Ed Korsinsky, Esq.

33 Whitehall Street, 27th Floor

New York, NY 10004

[email protected]

Tel: (212)363-7500

Fax: (212)363-7171

SOURCE: Levi & Korsinsky, LLP