Ardelyx (ARDX) awards CBO Mike Kelliher RSUs and stock options

Rhea-AI Filing Summary

Ardelyx, Inc. reported that Chief Business Officer Mike Kelliher received new equity awards on January 23, 2026. He was granted 103,080 restricted stock units, each convertible into one share of common stock upon vesting. He also received a stock option for 154,625 shares of common stock at an exercise price of $7.77 per share, vesting in 48 equal monthly installments starting January 23, 2026, subject to continued service. Following these awards, he directly beneficially owned 374,261 shares of Ardelyx common stock.

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

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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^*

Kelliher Mike

(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		103,080(1)	A	$0	374,261	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		154,625		(2)	01/23/2036	Common Stock	154,625	$0	154,625	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. 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:

Chief Business Officer

	/s/ Elizabeth Grammer, Attorney-in-Fact for Mike Kelliher	01/26/2026
	** 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).
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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) disclose for Mike Kelliher?

Ardelyx disclosed that Chief Business Officer Mike Kelliher received new equity grants on January 23, 2026, including restricted stock units and stock options.

How many Ardelyx (ARDX) RSUs were granted to Mike Kelliher?

Mike Kelliher was granted 103,080 restricted stock units (RSUs), each representing one share of Ardelyx common stock upon vesting.

What stock options did Mike Kelliher receive from Ardelyx (ARDX)?

He received a stock option for 154,625 shares of Ardelyx common stock with an exercise price of $7.77 per share, vesting over 48 monthly installments starting January 23, 2026.

What is the vesting schedule for Mike Kelliher’s new Ardelyx options?

The option vests in 48 equal monthly installments on each monthly anniversary of January 23, 2026, subject to his continued employment or service with Ardelyx.

How many Ardelyx (ARDX) shares does Mike Kelliher own after these grants?

After the reported transactions, Mike Kelliher beneficially owned 374,261 shares of Ardelyx common stock directly.

What is Mike Kelliher’s role at Ardelyx (ARDX)?

Mike Kelliher is the Chief Business Officer of Ardelyx, Inc., as noted in the filing remarks.