Eric D. Foster - 23 Jan 2026 Form 4 Insider Report for ARDELYX, INC. (ARDX)

Role
Chief Commercial Officer
Signature
/s/ Elizabeth Grammer, Attorney-in-fact for Eric D. Foster
Issuer symbol
ARDX
Transactions as of
23 Jan 2026
Net transactions value
$0
Form type
4
Filing time
26 Jan 2026, 16:27:05 UTC
Previous filing
25 Nov 2025
Next filing
23 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Foster Eric Duane Chief Commercial Officer C/O ARDELYX, INC., 400 FIFTH AVENUE, SUITE 210, WALTHAM /s/ Elizabeth Grammer, Attorney-in-fact for Eric D. Foster 26 Jan 2026 0002034148

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ARDX Common Stock Award $0 +137,945 +46% $0.000000 436,409 23 Jan 2026 Direct F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction ARDX Stock Option (Right to Buy) Award $0 +206,915 $0.000000 206,915 23 Jan 2026 Common Stock 206,915 $7.77 Direct F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.
F2 Includes the purchase of 2,780 shares under the Ardelyx Employee Stock Purchase Plan on August 31, 2025.
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.