Insider sale reported for ARDX (ARDX): 24,041 RSU shares vest

Rhea-AI Filing Summary

An insider transaction related to restricted stock units for the issuer was disclosed on 05/19/2026. The filing shows 24,041 shares tied to vesting of restricted stock units and lists prior open-market sales by Laura A. Williams on 02/20/2026 of 7,192 shares and 984 shares for proceeds of $42,181.08 and $5,622.38, respectively. The form reports Common Stock transactions for the account held with Morgan Stanley Smith Barney LLC.

Key Figures

RSU vesting: 24,041 shares Sale - Laura A. Williams: 7,192 shares Sale - Laura A. Williams: 984 shares +1 more

4 metrics

RSU vesting 24,041 shares vesting of restricted stock units on 05/19/2026

Sale - Laura A. Williams 7,192 shares sold on 02/20/2026 for $42,181.08

Sale - Laura A. Williams 984 shares sold on 02/20/2026 for $5,622.38

Broker-dealer Morgan Stanley Smith Barney LLC account listed for the Common Stock transactions

Key Terms

restricted stock units, Form 144, Common Stock

3 terms

restricted stock units financial

"Vesting of restricted stock units | Issuer | 24041 | 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

"CONTENT METADATA: "form_type": "144""

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.

Common Stock financial

"Securities To Be Sold | Common Stock | 05/19/2026"

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 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	10500	65415.00	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			24041	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
Laura A. Williams 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	7192	42181.08
Laura A. Williams 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	984	5622.38

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 does ARDX's Form 144 report?

It reports a proposed sale tied to vested restricted stock units on 05/19/2026. The form lists 24,041 shares from RSU vesting and prior sales by Laura A. Williams on 02/20/2026 of 7,192 and 984 shares.

Who sold shares in the past three months for ARDX?

Laura A. Williams reported two sales on 02/20/2026. The filing shows sales of 7,192 shares for $42,181.08 and 984 shares for $5,622.38, recorded under Common Stock.

How many shares vested for the issuer on 05/19/2026?

The filing shows 24,041 shares associated with vesting of restricted stock units on 05/19/2026. These shares are described as Common Stock tied to services rendered and listed with Morgan Stanley Smith Barney LLC.

Which broker-dealer handled the reported securities for ARDX?

The brokerage listed is Morgan Stanley Smith Barney LLC at 1 New York Plaza, 8th Floor. The Form 144 entry associates the Common Stock transactions and RSU vesting with that account and the NASDAQ listing.

Do the Form 144 entries show proceeds amounts for recent sales?

Yes; proceeds are shown for two sales on 02/20/2026. The amounts reported are $42,181.08 for 7,192 shares and $5,622.38 for 984 shares, respectively.