[144] Arrowhead Research Corporation SEC Filing

Rhea-AI Filing Summary

Arrowhead Research (ARWR) Form 144 notice: An individual identified as James Hamilton plans to sell 15,000 common shares through Merrill Lynch on 09/02/2025 with an aggregate market value of $374,970.05. The filing shows 138,257,550 shares outstanding for the issuer and names NASDAQ as the exchange.

The filing discloses the acquisition history for the shares being sold: multiple compensation grants between 01/04/2022 and 01/04/2025 totaling the reported units, and prior sales in August 2025 of 611 and 9,389 shares generating gross proceeds of $12,190.05 and $187,750.05, respectively. The filer affirms no undisclosed material adverse information.

Positive

• Disclosure compliance: Form 144 provides required details including broker, exchange, acquisition dates, and prior sales
• Clear acquisition history: All listed shares were acquired as compensation with specific dates from 2022 through 2025
• Prior sales reported: August 2025 sales of 611 and 9,389 shares with gross proceeds are disclosed

Negative

• Insider selling activity: Proposed sale of 15,000 shares may be viewed negatively by some investors
• Concentration of sales by one person: Multiple compensation grants and clustered disposals could raise liquidity questions for that insider

Insights

Securities Analyst

TL;DR: Routine insider sale notice showing small-volume dispositions filed under Rule 144; transparency maintained.

The Form 144 discloses a proposed sale of 15,000 common shares with clear acquisition dates and compensation as the source. Broker and exchange are identified, and recent August sales are reported with gross proceeds. This is a standard compliance filing that notifies the market of intended restricted/affiliate sales; the disclosed figures allow investors to quantify the transaction but do not by themselves indicate company performance.

Corporate Governance Expert

TL;DR: Filing meets disclosure requirements for insider sales and includes representation about material non-public information.

The notice properly lists the person for whose account the securities will be sold, the acquisition history showing compensation grants across multiple years, and recent sales during the past three months. The signature representation about lack of material non-public information is included. From a governance perspective, this is a routine disclosure ensuring market transparency regarding insider liquidity.

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	Merrill Lynch 75 Rockefeller Plz Flr 2 New York NY 10019	15000	374970.05	138257550	09/02/2025	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	01/04/2022	Compensation	James Hamilton			3485	09/02/2025	Compensation
Common	01/02/2023	Compensation	James Hamilton			15802	09/02/2025	Compensation
Common	01/04/2023	Compensation	James Hamilton			12557	09/02/2025	Compensation
Common	01/04/2024	Compensation	James Hamilton			1167	09/02/2025	Compensation
Common	01/08/2024	Compensation	James Hamilton			4950	09/02/2025	Compensation
Common	01/04/2025	Compensation	James Hamilton			27271	09/02/2025	Compensation

* 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
James Hamilton 177 E Colorado Blvd Ste. 700 Pasadena CA 91105	Common	08/13/2025	611	12190.05
James Hamilton 177 E Colorado Blvd Ste. 700 Pasadena CA 91105	Common	08/15/2025	9389	187750.05

144: 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 does the ARWR Form 144 disclose about the proposed sale?

The notice discloses a proposed sale of 15,000 common shares through Merrill Lynch on 09/02/2025 with an aggregate market value of $374,970.05 on NASDAQ.

Who is the person selling the shares on the Form 144?

The filing shows sales and acquisitions attributed to James Hamilton, including recent August 2025 dispositions and multiple compensation grants.

What prior sales in the past three months are reported for ARWR?

The Form 144 reports sales on 08/13/2025 of 611 shares (gross proceeds $12,190.05) and on 08/15/2025 of 9,389 shares (gross proceeds $187,750.05).

How were the shares that are being sold originally acquired?

All listed lots were acquired as compensation on dates between 01/04/2022 and 01/04/2025 as shown in the filing.

Which broker and exchange are being used for the proposed sale?

The broker is listed as Merrill Lynch (75 Rockefeller Plz, New York) and the exchange is NASDAQ.