ARDX insider Michael G. Raab sells 179,748 shares (NASDAQ: ARDX)

Rhea-AI Filing Summary

Ardelyx insider reported proposed and executed sales of Common Stock. Michael G. Raab reported multiple dispositions: 54,748 shares on 05/21/2026 for $343,133.09, 41,666 shares on 05/15/2026 for $261,610.40, 41,668 shares on 04/15/2026 for $261,954.22, and 41,666 shares on 03/16/2026 for $243,329.44. The filing lists prior grant sources including stock option exercises, restricted stock units, and an employee stock purchase plan.

Insights

Insider Transactions Specialist

Multiple scheduled dispositions by a reporting person across March–May 2026.

The record shows four dispositions by Michael G. Raab totaling reported share counts of 179,748 across the listed dates with exact proceeds recorded for each sale. The entries cite underlying sources such as option exercises, RSUs, and an employee purchase plan.

These notices are compliance filings; the cash‑flow recipients and any trading-plan language are not included in the excerpt. Subsequent filings or footnotes would clarify whether sales were pre‑arranged under a trading plan.

Securities Compliance Analyst

Form 144/A entries are administrative disclosures of proposed or completed sales.

Each line records a date, number of shares, and gross proceeds for proposed or effected sales as required for resale exemptions. The filing also enumerates grant sources and dates tied to the reported shares.

Timing and exact settlement details are not present in the excerpt; any regulatory or transfer restrictions are not shown here.

Key Figures

Total reported shares (sum of lines): 179,748 shares Proceeds on 05/21/2026: $343,133.09 Proceeds on 05/15/2026: $261,610.40 +3 more

6 metrics

Total reported shares (sum of lines) 179,748 shares March–May 2026 reported dispositions (41,666; 41,668; 41,666; 54,748)

Proceeds on 05/21/2026 <money>$343,133.09</money> <date>05/21/2026</date> sale of 54,748 shares

Proceeds on 05/15/2026 <money>$261,610.40</money> <date>05/15/2026</date> sale of 41,666 shares

Proceeds on 04/15/2026 <money>$261,954.22</money> <date>04/15/2026</date> sale of 41,668 shares

Proceeds on 03/16/2026 <money>$243,329.44</money> <date>03/16/2026</date> sale of 41,666 shares

Form type Form 144/A Notice of proposed sale/resale filings

Key Terms

Form 144/A, Restricted Stock Units, Employee Stock Purchase Plan

3 terms

Form 144/A regulatory

"144/A: Securities To Be Sold"

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 02/19/2025"

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.

Employee Stock Purchase Plan financial

"Employee Stock Purchase Plan | Issuer | 08/30/2024"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

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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/A

144/A: Filer Information

Filer CIK
Filer CCC
Previous Accession Number Of The Filing
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144/A: 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

Relationship to Issuer

144/A: 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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	41666	236662.88	247029387	06/15/2026	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/A: 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	06/15/2026	Exercise of Stock Options	Issuer			20833	06/15/2026	Cash
Common	02/19/2025	Restricted Stock Units	Issuer			19734	02/19/2025	N/A
Common	08/30/2024	Employee Stock Purchase Plan	Issuer			1099	08/30/2024	Cash

* 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/A: 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
MICHAEL G. RAAB 400 Fifth Avenue Suite 210 Waltham MA 02451	Common	05/21/2026	54748	343133.09
MICHAEL G. RAAB 400 Fifth Avenue Suite 210 Waltham MA 02451	Common	05/15/2026	41666	261610.40
MICHAEL G. RAAB 400 Fifth Avenue Suite 210 Waltham MA 02451	Common	04/15/2026	41668	261954.22
MICHAEL G. RAAB 400 Fifth Avenue Suite 210 Waltham MA 02451	Common	03/16/2026	41666	243329.44

144/A: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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 shares did ARDX insider Michael G. Raab sell in 2026?

He reported four dispositions totaling 179,748 shares across March–May 2026. The filings list 41,666, 41,668, 41,666, and 54,748 share entries with corresponding gross proceeds of $243,329.44, $261,954.22, $261,610.40, and $343,133.09 respectively.

Which grant sources are cited for the sold ARDX shares?

The filing lists underlying sources as stock option exercises, restricted stock units (RSUs), and an employee stock purchase plan. Specific grant dates shown include 02/19/2025 and 08/30/2024, tied to the respective reported lots.

Do these Form 144/A entries confirm settlement or proceeds received by the seller?

The entries record proposed or effected sale dates and gross proceeds amounts for each line. They do not, in the provided excerpt, confirm final settlement mechanics or net proceeds after withholding or fees.

Does the filing state whether sales were part of a trading plan (Rule 10b5-1)?

The provided excerpt does not include any statement about a Rule 10b5-1 plan. The filing lists dates, share counts, and proceeds but does not disclose whether transactions were pre‑arranged under a trading plan.