ARDX (NASDAQ) insider reports 10,388 RSUs vesting; prior sales 4,991 shares

Rhea-AI Filing Summary

ARDX related reporting person Joseph James Reilly reports the vesting of 10,388 restricted stock units on 05/19/2026 and discloses prior open-market sales of common stock on 02/20/2026 totaling 4,991 shares (4,387 + 602 + 2). The filing lists the issuer as the recipient of vested units for services rendered.

Insights

Equity Compensation Analyst

Vesting event and recent small disposals reported; routine compensation and liquidity activity.

The filing shows a vesting of 10,388 restricted stock units on 05/19/2026, recorded as issued for services rendered. The excerpt also records discrete share dispositions on 02/20/2026 totaling 4,991 shares.

These items are typical in executive compensation reporting; timing and tax/withholding treatment determine net receipt but are not detailed in the excerpt.

Corporate Governance Specialist

Disclosure-level filing; no material governance change disclosed.

The form lists the issuer and broker details along with reported sales by the reporting person. The transactions are administrative disclosures under resale/insider rules rather than corporate actions.

Cash‑flow treatment and any trading-plan attribution are not shown in the provided excerpt.

Key Figures

RSUs vested: 10,388 shares Shares sold (individual): 4,387 shares Shares sold (individual): 602 shares +3 more

6 metrics

RSUs vested 10,388 shares Vesting recorded on 05/19/2026 for services rendered

Shares sold (individual) 4,387 shares Sale on 02/20/2026 by Joseph James Reilly

Shares sold (individual) 602 shares Sale on 02/20/2026 by Joseph James Reilly

Shares sold (individual) 2 shares Sale on 02/20/2026 by Joseph James Reilly

Total shares sold (past 3 months) 4,991 shares Aggregate of three sales on 02/20/2026

Broker/Agent listed Morgan Stanley Smith Barney LLC Broker address shown on the form

Key Terms

restricted stock units, Form 144, vesting

3 terms

restricted stock units financial

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

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.

Form 144 regulatory

"Form type listed as 144 in the header"

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.

vesting financial

"Vesting of restricted stock units | Issuer | 10388 | 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.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	4700	29281.00	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			10388	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
Joseph James Reilly 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	4387	25729.76
Joseph James Reilly 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	602	3439.71
Joseph James Reilly 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	2	11.40

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What did ARDX reporting person Joseph James Reilly report on Form 144?

He reported the vesting of 10,388 restricted stock units on 05/19/2026 and prior sales totaling 4,991 shares on 02/20/2026. The RSUs are listed as issued for services rendered to the issuer.

How many shares were sold by Joseph James Reilly in the past three months?

The filing lists sales of 4,387, 602, and 2 common shares on 02/20/2026, totaling 4,991 shares. Each sale entry includes a dollar amount reported alongside the share count.

Were the restricted stock units reported as cash or stock proceeds?

The RSUs are described as vesting and issued by the issuer for services rendered on 05/19/2026. The excerpt does not state any cash proceeds or withholding details for those vested units.

Does the Form 144 show whether sales were part of a pre-arranged trading plan?

The provided excerpt does not include any statement about a Rule 10b5-1 trading plan or pre-arranged arrangement. The filing lists the sales and vesting facts without trading-plan attribution.