Ardelyx (ARDX) HR chief sells 15,136 shares to cover RSU taxes

Rhea-AI Filing Summary

Ardelyx, Inc. (ARDX) reported that Chief Human Resources Officer Brady James Parker sold a total of 15,136 shares of common stock on August 21, 2026. According to the company’s disclosure, these sales were an automatic sell-to-cover related to vesting RSUs, executed solely to cover withholding taxes at a weighted average price of $3.8569 per share across multiple trades.

Insider Trade Summary

Net Seller: 15,136 shares

Net Sell 2 txns

Insider Brady James Parker

Role Chief Human Resources Officer

Sold 15,136 shs ($58K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	1,976	$3.8569	$8K
Sale	Common Stock F1	13,160	$3.8569	$51K

Holdings After Transaction: Common Stock — 245,930 shares (Direct)

Footnotes (1)

1. F1. 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. The transaction was executed in multiple trades in prices ranging from $3.648 to $3.984, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

Key Figures

Shares sold (lot 1): 1,976 shares Shares sold (lot 2): 13,160 shares Total shares sold: 15,136 shares +2 more

5 metrics

Shares sold (lot 1) 1,976 shares Common stock sold by Brady James Parker on August 21, 2026

Shares sold (lot 2) 13,160 shares Common stock sold by Brady James Parker on August 21, 2026

Total shares sold 15,136 shares Aggregate of reported sales on August 21, 2026

Weighted average sale price $3.8569 per share Weighted average for sales executed between $3.648 and $3.984

Trade price range $3.648–$3.984 per share Range of prices for the multiple trades on August 21, 2026

Key Terms

automatic sell-to-cover, restricted stock units ("RSUs"), weighted average sale price

3 terms

automatic sell-to-cover financial

"Pursuant to an automatic sell-to-cover imposed by the terms of the initial grant"

restricted stock units ("RSUs") financial

"the terms of the initial grant of the restricted stock units ("RSUs") awards"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

weighted average sale price financial

"The price reported in Column 4 above reflects the weighted average sale price"

FAQ

What insider transaction did Ardelyx (ARDX) disclose for Brady James Parker?

Ardelyx disclosed that Chief Human Resources Officer Brady James Parker sold 15,136 shares of common stock on August 21, 2026. The sales were made automatically in connection with RSU vesting to cover applicable withholding taxes.

How many Ardelyx (ARDX) shares were sold and at what price?

On August 21, 2026, Brady James Parker sold 15,136 Ardelyx shares at a weighted average price of $3.8569 per share. The trades were executed in a price range from $3.648 to $3.984 per share.

Why did the Ardelyx (ARDX) insider sell 15,136 shares?

The filing states the shares were sold pursuant to an automatic sell-to-cover provision tied to Parker’s RSU grants, and were sold solely to cover applicable withholding taxes upon vesting of those RSUs.

Were Brady James Parker’s Ardelyx (ARDX) stock sales part of a tax-related transaction?

Yes. The company reports that the 15,136 shares sold by Brady James Parker were disposed of solely to cover withholding taxes arising from the vesting of restricted stock units under an automatic sell-to-cover mechanism.

Did the Ardelyx (ARDX) Form 4 indicate multiple trades for the insider sale?

Yes. The disclosure notes the transaction was executed in multiple trades within a price range of $3.648 to $3.984 per share, with the reported $3.8569 figure representing the weighted average sale price.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/25/2026 - 07:15 PM Accepted by SEC EDGAR 08/25/2026 - 07:15 PM Learn about SEC filing dates

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 MASSACHUSETTS 02451

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/21/2026

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

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

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

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	08/21/2026		S(1)		1,976	D	$3.8569	259,090	D
Common Stock	08/21/2026		S(1)		13,160	D	$3.8569	245,930	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. The transaction was executed in multiple trades in prices ranging from $3.648 to $3.984, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

Remarks:

	/s/ Felecia Ettenberg, Attorney-in-Fact for James Parker Brady	08/25/2026
	** 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.
* Form 4: SEC 1474 (03-26)