[144] Arrowhead Research Corporation SEC Filing

Rhea-AI Filing Summary

This Form 144 notice states that 9,389 shares of common stock are proposed for sale through Merrill Lynch on 08/15/2025, with an aggregate market value of $187,750.05. The filing lists the number of shares outstanding as 138,257,550 and names the exchange as NASDAQ.

The securities were acquired as compensation from James Hamilton on multiple dates between 01/04/2022 and 01/04/2025, with specified lot sizes included. The filer also reported a recent sale of 611 shares on 08/13/2025 for gross proceeds of $12,190.05. The form includes the standard attestation that the person signing does not possess undisclosed material adverse information.

Positive

• Required disclosure provided: the filing specifies broker, planned sale date, number of shares, and aggregate market value
• Acquisition history listed: each lot shows acquisition date and that shares were received as compensation

Negative

• None.

Insights

Securities Compliance Analyst

TL;DR Routine insider Form 144 disclosing proposed resale of compensation-issued shares through a broker on NASDAQ.

The filing documents a proposed sale of 9,389 common shares via Merrill Lynch scheduled for 08/15/2025 and reports prior sales activity on 08/13/2025. Acquisition records show the shares were granted as compensation across multiple dates and tranches from 2022 to 2025. From a compliance perspective, the form appears to provide required transaction, acquisition and broker details and includes the attestation regarding material nonpublic information.

Corporate Governance Expert

TL;DR An insider is selling previously granted compensation shares; disclosure is standard and informative for governance monitoring.

The report lists the holder as James Hamilton and details multiple compensation grants that underlie the shares to be sold. It also discloses a recent small sale and provides broker and scheduling information. This level of disclosure supports transparency around insider liquidity events but does not itself state any change in company operations or governance policies.

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 2nd Flr New York NY 10019	9389	187750.05	138257550	08/15/2025	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	08/15/2025	Compensation
Common	01/02/2023	Compensation	James Hamilton			15802	08/15/2025	Compensation
Common	01/04/2023	Compensation	James Hamilton			12557	08/15/2025	Compensation
Common	01/04/2024	Compensation	James Hamilton			1167	08/15/2025	Compensation
Common	01/08/2024	Compensation	James Hamilton			4950	08/15/2025	Compensation
Common	01/04/2025	Compensation	James Hamilton			27271	08/15/2025	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

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 Form 144 for ARWR disclose?

The form discloses a proposed sale of 9,389 common shares via Merrill Lynch on 08/15/2025 with an aggregate market value of $187,750.05.

Who acquired the shares being sold according to this filing?

The shares were listed as acquired from James Hamilton as compensation on multiple dates from 01/04/2022 through 01/04/2025.

Were there any recent sales reported in the filing?

Yes. The filing reports a sale of 611 shares on 08/13/2025 for gross proceeds of $12,190.05.

Which broker and exchange are named for the proposed sale?

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

Does the filing state any undisclosed material information?

The filer signs the standard attestation representing they do not know any undisclosed material adverse information regarding the issuer.