Ardelyx (ARDX) insider sale covers RSU tax withholding needs

Rhea-AI Filing Summary

ARDELYX, INC. executive Joseph James Reilly reported open-market sales of 4,991 shares of common stock on February 20, 2026, at prices between $5.7003 and $5.865 per share. According to the footnote, these transactions were automatic sell-to-cover trades upon RSU vesting, executed solely to cover withholding taxes. After the sales, Reilly directly owned 151,790 Ardelyx shares.

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^*

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)
02/20/2026

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	02/20/2026		S(1)		4,387	D	$5.865	152,394	D
Common Stock	02/20/2026		S(1)		602	D	$5.7138	151,792	D
Common Stock	02/20/2026		S(1)		2	D	$5.7003	151,790	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

Explanation of Responses:

1. Pursuant to an automatic sell-to-cover imposed by the terms of the initial grant of the restricted stock units ("RSUs") awards, the shares were sold upon the vesting of the RSUs solely to cover applicable withholding taxes.

Remarks:

Senior Vice President and Chief Accounting Officer

	/s/ Elizabeth Grammer, Attorney-in-Fact for Joseph J. Reilly	02/23/2026
	** 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).
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FAQ

What did Ardelyx (ARDX) insider Joseph James Reilly report on this Form 4?

Joseph James Reilly reported selling 4,991 Ardelyx common shares on February 20, 2026. The transactions were automatic sell-to-cover trades triggered by restricted stock unit vesting and were executed solely to satisfy related tax withholding obligations.

How many Ardelyx (ARDX) shares did Joseph James Reilly sell and at what prices?

Reilly sold a total of 4,991 Ardelyx common shares in three trades. The shares were sold at prices of $5.865, $5.7138, and $5.7003 per share as part of an automatic process tied to restricted stock unit vesting.

Why were Joseph James Reilly’s Ardelyx (ARDX) shares sold according to the Form 4 footnote?

The footnote states the shares were sold under an automatic sell-to-cover provision in the original RSU grant. The sales occurred upon vesting of the restricted stock units and were made solely to cover applicable withholding taxes owed by the insider.

How many Ardelyx (ARDX) shares does Joseph James Reilly own after these transactions?

Following the reported sell-to-cover transactions, Joseph James Reilly directly owned 151,790 shares of Ardelyx common stock. This post-transaction holding reflects his remaining equity position after the automatic tax-related sales on February 20, 2026.

Were Joseph James Reilly’s Ardelyx (ARDX) stock sales open-market transactions?

Yes. Each transaction is coded as an open-market or private sale of common stock. However, the footnote clarifies that these were automatic sell-to-cover trades executed upon RSU vesting specifically to pay required withholding taxes, not discretionary sales.