Tax-withholding sale by Ardelyx (ARDX) HR chief tied to RSUs

Rhea-AI Filing Summary

Ardelyx, Inc. executive Brady James Parker, the Chief Human Resources Officer, reported selling a total of 2,543 shares of common stock on February 20, 2026 in open-market transactions at prices of $5.865 and $5.7138 per share.

According to the footnote, these sales were an automatic sell-to-cover triggered upon the vesting of restricted stock units and were executed solely to cover applicable withholding taxes. After the transactions, Parker directly owned 262,912 Ardelyx shares.

Insider Trade Summary

Net Seller: 2,543 shares ($14,868)

Net Sell 2 txns

Insider Brady James Parker

Role Chief Human Resources Officer

Sold 2,543 shs ($15K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,234	$5.865	$13K
Sale	Common Stock	309	$5.7138	$2K

Holdings After Transaction: Common Stock — 263,221 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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
Estimated average burden
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^*

Brady James Parker

(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)
	Chief Human Resources Officer

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)		2,234	D	$5.865	263,221	D
Common Stock	02/20/2026		S(1)		309	D	$5.7138	262,912	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.

	/s/ Elizabeth Grammer, Attorney-in-Fact for James Parker Brady	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).
** 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 Brady James Parker?

Ardelyx reported that Chief Human Resources Officer Brady James Parker sold 2,543 shares of common stock. The sales occurred on February 20, 2026 in open-market transactions at prices of $5.865 and $5.7138 per share, as disclosed in the Form 4 data.

Why did Ardelyx executive Brady James Parker sell 2,543 ARDX shares?

The 2,543 Ardelyx shares were sold under an automatic sell-to-cover provision linked to restricted stock units. The footnote explains the shares were sold upon RSU vesting solely to cover applicable withholding taxes, indicating a tax-related transaction rather than a discretionary portfolio move.

What prices were received in Brady James Parker’s Ardelyx (ARDX) share sales?

Brady James Parker’s Ardelyx share sales were executed at two prices: 2,234 shares at $5.865 per share and 309 shares at $5.7138 per share. Both transactions were classified as open-market sales of common stock on February 20, 2026.

How many Ardelyx (ARDX) shares does Brady James Parker hold after the sale?

After the reported transactions, Brady James Parker directly owned 262,912 shares of Ardelyx common stock. This post-transaction balance reflects the completion of the 2,543-share sell-to-cover sale that was executed to satisfy withholding tax obligations on vested restricted stock units.

What role does Brady James Parker hold at Ardelyx (ARDX) in this Form 4 filing?

In this Form 4 data, Brady James Parker is identified as an officer of Ardelyx serving as Chief Human Resources Officer. The reported insider transactions therefore represent trades by a senior executive with direct ownership of Ardelyx common stock after the RSU-related tax sales.

How many Ardelyx (ARDX) insider sales are included in this Form 4 data?

The Form 4 data shows two separate insider sale transactions on February 20, 2026. Both involved Ardelyx common stock, were coded as open-market sales, and together totaled 2,543 shares sold, executed to cover withholding taxes tied to vesting restricted stock units.