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ARDX SCHEDULE 13G: SEC filing

Rubric Capital Management LP and David Rosen

Filed with the SEC on · accession 0001104659-26-097075

ARDX filed a SCHEDULE 13G (schedule 13g) with the SEC on Aug 14, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +3.8% by the first close after the filing.

Summary of the filing

Rubric Capital Management LP and David Rosen filed a joint Schedule 13G regarding their passive ownership position in Ardelyx, Inc. The filing includes a joint filing agreement executed on August 14, 2026.

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Key details

Reporting person / potential beneficial ownerRubric Capital Management LP
IssuerArdelyx, Inc.
Chief operating officer, rubric capital management lpMichael Nachmani
Reporting personDavid Rosen

How ARDX stock reacted

Close before

$3.91

Aug 13, 2026

First close after

+3.84%

$4.06

5 trading days

-0.26%

$3.90

Since filing

-23.91%

$2.98

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Frequently asked questions

What did ARDX file with the SEC on Aug 14, 2026?

ARDX filed a SCHEDULE 13G (SEC filing). Rubric Capital Management LP and David Rosen filed a joint Schedule 13G regarding their passive ownership position in Ardelyx, Inc. The filing includes a joint filing agreement executed on August 14, 2026.

How do I read a SCHEDULE 13G?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G (schedule 13g): A report the company filed with the SEC (the US market regulator).

How did ARDX stock react to this filing?

ARDX closed at $3.91 before the filing and $4.06 on Aug 14, 2026 (+3.84%). Five trading days later: $3.90 (-0.26%).

Other ARDX SEC filings

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