ARDX (NASDAQ: ARDX) files Form 144 for 24,986 RSUs vesting

Rhea-AI Filing Summary

ARDX submitted a Rule 144 notice relating to Common Stock tied to the vesting of 24,986 restricted stock units on 05/19/2026. The filing also lists three dispositions by Mike Kelliher on 02/20/2026 of 8,434, 1,159 and 2 shares with reported proceeds of $49,465.41, $6,622.29 and $11.41, respectively.

Insights

Securities Compliance Counsel

Routine Form 144 notice for vested RSUs and recent insider dispositions.

The filing documents the vesting of 24,986 restricted stock units on 05/19/2026, reported as intended for resale under transfer restrictions. It also records three small open-market dispositions by a named holder on 02/20/2026.

These items are procedural: the vesting creates shares eligible for registration or resale and the three sales are modest absolute amounts. Subsequent filings would show whether resales were completed and any broker/dealer placement details.

Key Figures

RSUs vesting: 24,986 shares Disposition by Mike Kelliher: 8,434 shares Disposition by Mike Kelliher: 1,159 shares +1 more

4 metrics

RSUs vesting 24,986 shares vesting of restricted stock units on 05/19/2026

Disposition by Mike Kelliher 8,434 shares sale on 02/20/2026, proceeds <money>$49,465.41</money>

Disposition by Mike Kelliher 1,159 shares sale on 02/20/2026, proceeds <money>$6,622.29</money>

Disposition by Mike Kelliher 2 shares sale on 02/20/2026, proceeds <money>$11.41</money>

Key Terms

restricted stock units, vesting, Common Stock

3 terms

restricted stock units financial

"Vesting of restricted stock units | Issuer | 24986 | 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.

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.

Common Stock market

"Common Stock | Morgan Stanley Smith Barney LLC"

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 MA 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			24986	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
Mike Kelliher 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	8434	49465.41
Mike Kelliher 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	1159	6622.29
Mike Kelliher 400 Fifth Avenue, Suite 210 Waltham MA 02451	Common Stock	02/20/2026	2	11.41

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 disclose about RSU vesting?

It discloses the vesting of 24,986 restricted stock units on 05/19/2026. The entry identifies those units as Common Stock tied to services rendered, indicating they converted to shares on that date.

Who reported share sales in the filing and how many shares were sold?

Mike Kelliher reported three dispositions on 02/20/2026 of 8,434 shares, 1,159 shares, and 2 shares. Each sale row includes the dollar proceeds reported alongside the share counts.

What proceeds were reported for the sales listed in the filing?

The filing lists proceeds of $49,465.41 for 8,434 shares, $6,622.29 for 1,159 shares, and $11.41 for 2 shares. These values appear in the sales rows provided.

Does the filing state how the vested shares will be sold?

The excerpt lists an intermediary, Morgan Stanley Smith Barney LLC, and includes a quantity field but does not attach a specific distribution method in the visible lines. Further filing text would be needed for sale mechanics.