Ardelyx (ARDX) HR chief sells 1,846 shares to cover RSU taxes

Rhea-AI Filing Summary

ARDELYX, INC. reported that Chief Human Resources Officer Brady James Parker had 1,846 shares of common stock sold at an average price of $6.2675 per share. According to the footnote, this automatic sell-to-cover transaction occurred upon RSU vesting to satisfy withholding taxes, leaving him with 261,066 shares directly owned.

Insider Trade Summary

Net Seller: 1,846 shares ($11,570)

Net Sell 1 txn

Insider Brady James Parker

Role Chief Human Resources Officer

Sold 1,846 shs ($12K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,846	$6.2675	$12K

Holdings After Transaction: Common Stock — 261,066 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 1,846 shares Average sale price: $6.2675 per share Shares owned after transaction: 261,066 shares

3 metrics

Shares sold 1,846 shares Open-market sale to cover RSU withholding taxes

Average sale price $6.2675 per share Automatic sell-to-cover transaction

Shares owned after transaction 261,066 shares Direct ownership following sell-to-cover

Key Terms

restricted stock units ("RSUs"), sell-to-cover, withholding taxes, Common Stock

4 terms

restricted stock units ("RSUs") financial

"initial grant of the restricted stock units ("RSUs") awards, the shares were sold"

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.

sell-to-cover financial

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

Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.

withholding taxes financial

"shares were sold upon the vesting of the RSUs solely to cover applicable withholding taxes"

Withholding taxes are amounts a payer or government takes out of payments — such as wages, interest, or dividends — before the recipient gets the money, functioning like a cashier keeping part of a bill to pay taxes on your behalf. For investors this matters because it reduces the cash they actually receive, affects net returns and yield calculations, and may require additional paperwork or treaty claims to recover or offset the withheld amount against final tax bills.

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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 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)
05/21/2026

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	05/21/2026		S(1)		1,846	D	$6.2675	261,066	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:

	/s/ Michael Raab, Attorney-in-Fact for James Parker Brady	05/22/2026
	** 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)

FAQ

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

Ardelyx reported that Chief Human Resources Officer Brady James Parker had 1,846 shares of common stock sold. The shares were sold automatically upon RSU vesting to cover withholding taxes, rather than as a discretionary open-market sale.

At what price were the Ardelyx (ARDX) shares sold in Brady James Parker’s Form 4?

The 1,846 Ardelyx common shares were sold at an average price of $6.2675 per share. This sale was part of an automatic sell-to-cover arrangement tied to restricted stock unit vesting and related tax obligations.

How many Ardelyx (ARDX) shares does Brady James Parker hold after this transaction?

Following the transaction, Brady James Parker directly owns 261,066 Ardelyx common shares. The reported sale was relatively small compared with his remaining holdings and was executed to cover RSU-related withholding taxes.

Was the Ardelyx (ARDX) insider sale by Brady James Parker discretionary?

The sale was not discretionary. The filing states it was an automatic sell-to-cover triggered by the vesting of restricted stock units, with shares sold solely to satisfy applicable withholding tax requirements.

What is the nature of the Ardelyx (ARDX) transaction reported under code S in this Form 4?

Although coded as an S sale, the footnote explains the transaction is an automatic sell-to-cover. Shares were sold when RSUs vested to pay withholding taxes, rather than reflecting an elective open-market reduction of Parker’s investment position.