STOCK TITAN

Ardelyx (ARDX) CBO offloads 7,758 shares for RSU taxes

(Neutral)
(Negative)
Form Type
4

Rhea-AI Filing Summary

ARDELYX, INC. (ARDX) reported that Chief Business Officer Mike Kelliher sold a total of 7,758 shares of common stock on 2026-08-21. The sales were executed as an automatic sell-to-cover required by the terms of his restricted stock unit awards, and were made solely to cover applicable withholding taxes upon RSU vesting. The transactions occurred in multiple trades at prices ranging from $3.648 to $3.984 per share, with a weighted average sale price of $3.8569 per share.

Positive

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Insider Kelliher Mike
Role Chief Business Officer
Sold 7,758 shs ($30K)
Type Security Shares Price Value
Sale Common Stock F1 3,104 $3.8569 $12K
Sale Common Stock F1 2,652 $3.8569 $10K
Sale Common Stock F1 2,002 $3.8569 $8K
Holdings After Transaction: Common Stock — 349,660 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.
Total shares sold 7,758 shares Aggregate common stock sold by Mike Kelliher on 2026-08-21
Weighted average sale price $3.8569 per share Weighted average price across multiple trades on 2026-08-21
Price range of trades $3.648 to $3.984 per share Range of prices for the multiple sale trades on 2026-08-21
Individual sale leg 1 3,104 shares at $3.8569 per share First reported sale of common stock on 2026-08-21
Individual sale leg 2 2,652 shares at $3.8569 per share Second reported sale of common stock on 2026-08-21
Individual sale leg 3 2,002 shares at $3.8569 per share Third reported sale of common stock on 2026-08-21
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.
restricted stock units ("RSUs") financial
"imposed by 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"
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.

FAQ

What insider transaction did ARDX report for Mike Kelliher on this Form 4?

ARDX reported that Chief Business Officer Mike Kelliher sold a total of 7,758 shares of common stock on 2026-08-21 in connection with the vesting of restricted stock units.

Was Mike Kelliher’s ARDX stock sale under a trading plan or automatic mechanism?

Yes. The filing states the sale was pursuant to an automatic sell-to-cover imposed by the terms of the initial RSU grants, and the shares were sold solely to cover applicable withholding taxes upon vesting.

At what prices were the ARDX shares sold by Mike Kelliher?

The shares were sold in multiple trades at prices ranging from $3.648 to $3.984 per share. The reported weighted average sale price was $3.8569 per share.

How many ARDX shares did Mike Kelliher sell in total on 2026-08-21?

On 2026-08-21, Mike Kelliher sold a total of 7,758 shares of ARDELYX, INC. common stock in three separate sale transactions linked to RSU vesting.

Did ARDX indicate that the insider sale was for tax withholding purposes?

Yes. The company disclosed that the shares were sold solely to cover applicable withholding taxes triggered by the vesting of restricted stock unit awards, under an automatic sell-to-cover feature.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4
FORM 4UNITED 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*
Kelliher Mike

(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Business 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock08/21/2026S(1)3,104D$3.8569354,314D
Common Stock08/21/2026S(1)2,652D$3.8569351,662D
Common Stock08/21/2026S(1)2,002D$3.8569349,660D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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 Mike Kelliher08/25/2026
** Signature of Reporting PersonDate
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)