Joseph J. Reilly - 23 Jan 2026 Form 4 Insider Report for ARDELYX, INC. (ARDX)

Reporting relationship: Senior Vice President of Finance
Issuer ticker: ARDX
Reported as of: 23 Jan 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 27 Jan 2026, 16:13:38 UTC
Prior SEC filing: 25 Nov 2025
Next SEC filing: 23 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Elizabeth Grammer, Attorney-in-Fact for Joseph J. Reilly

Key filing fact

Joseph J. Reilly filed Form 4 for ARDELYX, INC. (ARDX) on 27 Jan 2026.

Key facts

This page summarizes Joseph J. Reilly's Form 4 filing for ARDELYX, INC. (ARDX).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 27 Jan 2026, 16:13.

Change

Previous filing in this sequence was filed on 25 Nov 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002044416 Primary reporting owner

Reilly Joseph James

Relationship: Senior Vice President of Finance
Address: C/O ARDELYX, INC., 400 FIFTH AVENUE, SUITE 210, WALTHAM
Signature: /s/ Elizabeth Grammer, Attorney-in-Fact for Joseph J. Reilly
Signature date: 27 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ARDX transaction

Common Stock

Award

Transaction value: $0
Shares: +46,200
Change %: +42%
Price: $0.000000
Shares after: 156,781
Date: 23 Jan 2026
Ownership: Direct
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ARDX transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value: $0
Shares: +69,360
Change %
Price: $0.000000
Shares after: 69,360
Date: 23 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 69,360
Exercise price: $7.77
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Restricted stock units ("RSUs"). The Reporting Person is entitled to receive one (1) shares of Common Stock for each one (1) RSU upon the vesting thereof.

Footnote F2

Includes the purchase of 1,667 shares under the Ardelyx Employee Stock Purchase Plan on August 31, 2025.

Footnote F3

The option becomes exercisable as it vests and the shares subject to the option vest in 48 successive, equal monthly installments on each monthly anniversary of January 23, 2026, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date.

SEC remarks

Senior Vice President of Finance