Insider Hongbo Lu notifies sale of 2,970 ARWR shares (NASDAQ: ARWR)

Rhea-AI Filing Summary

ARWR insider notice: Hongbo Lu filed a Form 144/A disclosing proposed sale of 2,970 shares of common stock, with an aggregate amount shown as $228,298.95. The filing lists 03/15/2026 and an execution/filing date of 05/12/2026, and identifies the sale reason as compensation.

Insights

Securities Compliance Analyst

Notice of proposed sale by an insider under Rule 144; limited operational detail.

The filing is a regulatory notice that a named insider, Hongbo Lu, intends to sell 2,970 shares of common stock, showing an aggregate amount of $228,298.95. The record cites 03/15/2026 and a filing date of 05/12/2026.

Timing, method of sale, and purchaser details are not provided in the excerpt; the form simply notifies the market of a proposed transaction tied to compensation. Subsequent transactional reports or broker confirmations would show completion and cash‑flow treatment.

Key Figures

Shares proposed for sale: 2,970 shares Aggregate amount: $228,298.95 Filing date: 05/12/2026

3 metrics

Shares proposed for sale 2,970 shares listed under Securities To Be Sold; <date>03/15/2026</date>

Aggregate amount $228,298.95 amount shown on filing

Filing date 05/12/2026 submission/contact/filing date on the notice

Key Terms

Form 144/A, compensation, aggregate amount

3 terms

Form 144/A regulatory

"filed a Form 144/A disclosing proposed sale of 2,970 shares"

compensation financial

"identifies the sale reason as compensation"

aggregate amount financial

"shows an aggregate amount of $228,298.95"

FAQ

What does the ARWR Form 144/A disclose?

The filing discloses a proposed sale of 2,970 shares by Hongbo Lu, listing an aggregate amount of $228,298.95. It cites 03/15/2026 and a filing/execution date of 05/12/2026, and states the reason as compensation.

Does the Form 144/A confirm the shares were sold?

No — Form 144/A is a notice of a proposed sale; it does not by itself confirm settlement. Completion and cash receipt would appear in subsequent transaction reports or broker records rather than in this notice.

Who is the reporting person in the ARWR notice?

The reporting person named is Hongbo Lu. The filing links the proposed disposition to compensation, indicating the shares tied to a compensation event rather than an open‑market purchase.

What amount and dates are shown in the filing?

The excerpt shows 2,970 shares and an aggregate figure of $228,298.95. It lists 03/15/2026 (security date) and a filing/execution date of 05/12/2026 in the notice.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/19/2026 - 04:43 PM Learn about SEC filing dates

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	0001767584
Filer CCC	XXXXXXXX
Previous Accession Number Of The Filing	0001628280-26-034153
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144/A: Issuer Information

Name of Issuer	Arrowhead Pharmaceuticals Inc.
SEC File Number	001-38042
Address of Issuer	177 E. Colorado Blvd Ste 700 Pasadena CALIFORNIA 91105
Phone	626-304-3400
Name of Person for Whose Account the Securities are To Be Sold	Hongbo Lu
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	Officer

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	Merrill Lynch 75 Rockefeller Plaza Floor 2 New York NY 10019	2970	228298.95	140857021	05/12/2026	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	03/15/2026	Compensation	Hongbo Lu			2970	05/12/2026	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/A: Securities Sold During The Past 3 Months

Nothing to Report

144/A: Remarks and Signature

Remarks	Form 144 being amended to add in 10b5-1 adoption date. Original date of notice 05/12/2026.
Date of Notice	05/19/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	01/14/2026
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	Hongbo Lu
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)