Ardelyx (ARDX) SVP Reilly gets 46,200 RSUs and 69,360 options

Rhea-AI Filing Summary

Ardelyx, Inc. reported that Senior Vice President of Finance Joseph James Reilly received new equity awards on January 23, 2026. He was granted 46,200 restricted stock units (RSUs), which each convert into one share of common stock upon vesting, at a grant price of $0. He also received a stock option for 69,360 shares of common stock at an exercise price of $7.77 per share, with the option vesting in 48 equal monthly installments starting January 23, 2026, conditioned on continued service. Following these awards, he beneficially owns 156,781 shares of Ardelyx common stock, which includes 1,667 shares acquired through the company’s employee stock purchase plan on August 31, 2025.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Reilly Joseph James

(Last) (First) (Middle)

C/O ARDELYX, INC.

400 FIFTH AVENUE, SUITE 210

(Street)

WALTHAM MA 02451

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ARDELYX, INC. [ ARDX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
01/23/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	01/23/2026		A		46,200(1)	A	$0	156,781(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$7.77	01/23/2026		A		69,360		(3)	01/23/2036	Common Stock	69,360	$0	69,360	D

Explanation of Responses:

1. 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.

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

3. 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.

Remarks:

Senior Vice President of Finance

	/s/ Elizabeth Grammer, Attorney-in-Fact for Joseph J. Reilly	01/27/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Ardelyx (ARDX) report for Joseph James Reilly?

Ardelyx reported that Senior Vice President of Finance Joseph James Reilly received new equity awards on January 23, 2026, including restricted stock units and a stock option grant.

How many Ardelyx (ARDX) RSUs were granted to Joseph James Reilly?

Joseph James Reilly was granted 46,200 restricted stock units (RSUs), each representing the right to receive one share of Ardelyx common stock upon vesting.

What stock option grant did Joseph James Reilly receive from Ardelyx (ARDX)?

He received a stock option for 69,360 shares of Ardelyx common stock with an exercise price of $7.77 per share. The option was granted at a price of $0 for the award itself.

How do Joseph James Reilly’s Ardelyx (ARDX) options vest?

The option for 69,360 shares becomes exercisable as it vests, with the underlying shares vesting in 48 equal monthly installments on each monthly anniversary of January 23, 2026, subject to his continued employment or service.

How many Ardelyx (ARDX) shares does Joseph James Reilly now beneficially own?

After the reported transactions, Joseph James Reilly beneficially owns 156,781 shares of Ardelyx common stock, including 1,667 shares purchased under the employee stock purchase plan on August 31, 2025.

What role does Joseph James Reilly hold at Ardelyx (ARDX)?

Joseph James Reilly serves as Senior Vice President of Finance at Ardelyx, Inc., according to the filing’s remarks section.