Key facts
- This page summarizes Patrick O'Brien's Form 4 filing for ARROWHEAD PHARMACEUTICALS, INC. (ARWR).
- 6 reported transactions and 0 derivative rows are listed below.
- Accepted by SEC: 08 Jan 2026, 18:45.
Patrick O'Brien - 06 Jan 2026 Form 4 Insider Report for ARROWHEAD PHARMACEUTICALS, INC. (ARWR)
- SEC form
- 4
- Accepted by SEC
- 08 Jan 2026, 18:45:43 UTC
- Prior SEC filing
- 05 Jan 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/Patrick O'Brien
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Patrick O'Brien filed Form 4 for ARROWHEAD PHARMACEUTICALS, INC. (ARWR) on 08 Jan 2026.
Change
- Previous filing in this sequence was filed on 05 Jan 2026.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001627183
Primary reporting owner
O'Brien Patrick
- Relationship
- COO
- Address
- 177 E. COLORADO BLVD, SUITE 700, PASADENA
- Signature
- /s/Patrick O'Brien
- Signature date
- 08 Jan 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
ARWR
transaction
Common Stock
Gift
- Transaction value
- $0
- Shares
- -540
- Change %
- -0.11%
- Price
- $0.000000
- Shares after
- 474,368
- Date
- 06 Jan 2026
- Ownership
- Direct
- Footnotes
- F1, F2
ARWR
transaction
Common Stock
Gift
- Transaction value
- $0
- Shares
- -540
- Change %
- -0.11%
- Price
- $0.000000
- Shares after
- 473,828
- Date
- 06 Jan 2026
- Ownership
- Direct
- Footnotes
- F1, F2
ARWR
transaction
Common Stock
Gift
- Transaction value
- $0
- Shares
- -540
- Change %
- -0.11%
- Price
- $0.000000
- Shares after
- 473,288
- Date
- 06 Jan 2026
- Ownership
- Direct
- Footnotes
- F1, F2
ARWR
transaction
Common Stock
Gift
- Transaction value
- $0
- Shares
- -440
- Change %
- -0.09%
- Price
- $0.000000
- Shares after
- 472,848
- Date
- 06 Jan 2026
- Ownership
- Direct
- Footnotes
- F1, F2
ARWR
transaction
Common Stock
Gift
- Transaction value
- $0
- Shares
- -440
- Change %
- -0.09%
- Price
- $0.000000
- Shares after
- 472,408
- Date
- 06 Jan 2026
- Ownership
- Direct
- Footnotes
- F1, F2
ARWR
transaction
Common Stock
Award
- Transaction value
- $0
- Shares
- +75,000
- Change %
- +16%
- Price
- $0.000000
- Shares after
- 547,408
- Date
- 06 Jan 2026
- Ownership
- Direct
- Footnotes
- F2, F3
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 3 footnotes
Footnote F1
Gift to relatives
Footnote F2
Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person, a portion of which are still subject to certain vesting conditions.
Footnote F3
Represents shares underlying restricted stock units which will vest in four equal annual installments.