ARDX Form 144: Proposed Common Stock Sale

ARDX filed a Form 144 reporting a proposed sale of Common Stock and vesting of restricted stock units.

Rhea-AI Filing Summary

ARDX filed a Form 144 reporting a proposed sale of Common Stock and vesting of restricted stock units. The filing lists 28,415 shares tied to vesting on 05/19/2026. It also discloses recent dispositions by Eric Duane Foster on 02/20/2026, including 9,176 and 1,261 shares.

Insights

Securities Counsel

Filing documents an affiliate sale notice and RSU vesting; not a company capital raise.

The Form 144 entry lists a proposed sale related to 28,415 restricted stock units vesting on 05/19/2026. This is a broker/affiliate disclosure of a resale/vesting event, not an offering by the issuer.

Cash‑flow treatment and distribution mechanics are not stated in the excerpt; subsequent filings or trade reports would show executed sales and proceeds.

Key Figures

RSUs vesting: 28,415 shares Sale reported (example): 9,176 shares Sale reported (example): 1,261 shares

3 metrics

RSUs vesting 28,415 shares vesting of restricted stock units on <date>05/19/2026</date>

Sale reported (example) 9,176 shares Eric Duane Foster disposition on <date>02/20/2026</date>

Sale reported (example) 1,261 shares Eric Duane Foster disposition on <date>02/20/2026</date>

Key Terms

Form 144, restricted stock units, vesting

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

restricted stock units financial

"Vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vesting financial

"Vesting of restricted stock units on 05/19/2026"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

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

What does the ARDX Form 144 disclose?

It discloses a proposed resale tied to the vesting of 28,415 restricted stock units on 05/19/2026. The filing also lists prior sales by Eric Duane Foster on 02/20/2026 of 9,176 and 1,261 shares.

Who is the selling party in the ARDX filing?

The filing shows transactions by Eric Duane Foster and a broker entry for Morgan Stanley Smith Barney LLC. The excerpt lists Foster's past dispositions dated 02/20/2026 with specific share counts.

Are the shares from ARDX an issuer offering or resale?

The filing identifies the transactions as tied to vesting and resale by an affiliate, indicating a resale/holdings disposition rather than a primary issuer offering. No primary offering proceeds are described in the excerpt.

When were the previously sold ARDX shares transacted?

The transactions shown for Eric Duane Foster occurred on 02/20/2026, including disposals of 9,176 and 1,261 shares, plus two single‑share entries listed on the same date.

Does the Form 144 state how proceeds will be used?

The provided excerpt does not describe use of proceeds or who receives cash. It lists vesting and resale quantities and dates, without specifying proceeds allocation or issuer receipt.

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

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Accepted by SEC EDGAR 05/19/2026 - 06:56 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	617-675-2739
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	11900	74137.00	247029387	05/19/2026	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	05/19/2026	Vesting of restricted stock units	Issuer			28415	05/19/2026	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	02/20/2026	9176	53817.24
Eric Duane Foster 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	1261	7205.10
Eric Duane Foster 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	1	5.71
Eric Duane Foster 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	1	5.70

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	05/19/2026
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	Michael Raab, 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)