ARDX insider files notice to sell 28,415 shares

Eric Duane Foster submitted a notice of proposed sale of 28,415 shares of Common Stock following vesting of restricted stock units on 02/19/2026.

Rhea-AI Filing Summary

Eric Duane Foster submitted a notice of proposed sale of 28,415 shares of Common Stock following vesting of restricted stock units on 02/19/2026. The filing also discloses a prior sale of 5,814 shares on 11/21/2025 and lists Morgan Stanley Smith Barney LLC as the broker.

Insights

Corporate Governance Specialist

Routine affiliate resale notice tied to RSU vesting; no new financing or material change.

The form records a proposed sale of 28,415 shares that became available upon the vesting of restricted stock units on 02/19/2026. It lists a broker and a prior disposition of 5,814 shares on 11/21/2025.

Timing and execution details are not provided here; subsequent SEC or broker reports will show whether and when sales occur.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does ARDX Form 144 filed by Eric Duane Foster disclose?

It discloses a proposed sale of 28,415 shares. The shares arose from RSU vesting on 02/19/2026. The filing also shows a prior sale of 5,814 shares on 11/21/2025 and names Morgan Stanley Smith Barney LLC as the broker.

Does the Form 144 indicate these ARDX shares were already sold?

No — it is a notice of proposed sale tied to RSU vesting. The filing lists the 28,415 shares as securities to be sold following vesting on 02/19/2026. Actual sale execution and dates are not provided in this excerpt.

How many ARDX shares were sold in the prior three months per the filing?

The filing reports a prior sale of 5,814 shares. That disposition is dated 11/21/2025. The current notice covers a separate 28,415-share block from RSU vesting on 02/19/2026.

Who is the broker listed on the Form 144 for ARDX transactions?

Morgan Stanley Smith Barney LLC is named as the broker. The broker address is shown as Executive Financial Services, 1 New York Plaza, New York, NY. The filing ties the proposed resale to that broker entry.

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

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Accepted by SEC EDGAR 02/20/2026 - 06:21 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002034148
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ARDELYX, INC.
SEC File Number	001-36485
Address of Issuer	400 Fifth Avenue, Suite 210 Waltham MASSACHUSETTS 02451
Phone	510-745-1700
Name of Person for Whose Account the Securities are To Be Sold	Foster Eric Duane
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza, 8th Floor New York NY 10004	13350	76495.50	245247427	02/20/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	02/19/2026	Vesting of restricted stock units	Issuer			28415	02/19/2026	Services Rendered

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Eric Duane Foster 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	11/21/2025	5814	32191.54

144: Remarks and Signature

Remarks	Pursuant to an automatic sell-to-cover imposed by the terms of the initial grant of the restricted stock units (RSUs) awards, the shares are to be sold upon the vesting of the RSUs solely to cover applicable withholding taxes.
Date of Notice	02/20/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Elizabeth Grammer, as Attorney-in-Fact for Eric Duane Foster
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)