ARROWHEAD PHARMACEUTICALS, INC.
Total Trades
76
Buys
1
Sells
61
Largest Trade
N/A
Insiders
14
Institutional Funds
330
Inst. Value
$1M+
Activist Filings
21
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| O'Brien Patrick | COO | SELL | $1M+ | 49K | $63.11 | Jan 6, 2026 |
| Hamilton James C | Chief Medical Offi… | SELL | $1M+ | 40K | $63.11 | Jan 6, 2026 |
| Anzalone Christopher Richard | CEO | SELL | $500K+ | 13K | $66.10 | Jan 6, 2026 |
| Anzalone Christopher Richard | CEO | EXERCISE | $100K–$500K | 52K | $6.15 | Dec 30, 2025 |
| Anzalone Christopher Richard | CEO | SELL | $1M+ | 52K | $69.13 | Dec 30, 2025 |
| Ferrari Mauro | Director | SELL | $500K+ | 8K | $70.00 | Dec 30, 2025 |
| Waddill William D. | Director | SELL | $500K+ | 8K | $67.65 | Dec 23, 2025 |
| Vakiener Victoria | Director | SELL | $500K+ | 10K | $67.68 | Dec 23, 2025 |
| Anzalone Christopher Richard | CEO | SELL | $1M+ | 26K | $68.04 | Dec 23, 2025 |
| OLUKOTUN ADEOYE Y | Director | SELL | $500K+ | 10K | $67.66 | Dec 23, 2025 |
| Anzalone Christopher Richard | CEO | SELL | $1M+ | 85K | $64.04 | Dec 19, 2025 |
| Anzalone Christopher Richard | CEO | GRANT | N/A | 180K | — | Dec 16, 2025 |
| Anzalone Christopher Richard | CEO | SELL | $1M+ | 184K | $67.00 | Dec 16, 2025 |
| PERRY MICHAEL S | Director | SELL | $500K+ | 16K | $61.03 | Dec 9, 2025 |
| Ferrari Mauro | Director | SELL | $100K–$500K | 9K | $56.39 | Dec 1, 2025 |
| Hamilton James C | Chief Medical Offi… | SELL | $100K–$500K | 15K | $30.00 | Sep 16, 2025 |
| Hamilton James C | Chief Medical Offi… | SELL | $100K–$500K | 15K | $25.00 | Sep 4, 2025 |
| Anzalone Christopher Richard | CEO | SELL | $1M+ | 141K | $10.87 | Apr 11, 2025 |
| Anzalone Christopher Richard | CEO | SELL | $500K+ | 51K | $15.07 | Mar 17, 2025 |
| Anzalone Christopher Richard | CEO | GRANT | N/A | 340K | — | Mar 17, 2025 |
| OLUKOTUN ADEOYE Y | Director | SELL | $15K–$50K | 959 | $21.00 | Jan 28, 2025 |
| Hamilton James C | Chief Discovery/Tr… | SELL | $500K+ | 33K | $19.82 | Jan 8, 2025 |
| Hamilton James C | Chief Discovery/Tr… | GRANT | N/A | 100K | — | Jan 8, 2025 |
| O'Brien Patrick | COO and General Co… | SELL | $500K+ | 37K | $19.80 | Jan 8, 2025 |
| O'Brien Patrick | COO and General Co… | GRANT | N/A | 100K | — | Jan 8, 2025 |
| Myszkowski Kenneth Allen | CFO | SELL | $500K+ | 45K | $19.77 | Jan 8, 2025 |
| Myszkowski Kenneth Allen | CFO | GRANT | N/A | 100K | — | Jan 8, 2025 |
| Anzalone Christopher Richard | CEO | SELL | $100K–$500K | 12K | $19.05 | Jan 6, 2025 |
| OLUKOTUN ADEOYE Y | Director | SELL | $50K–$100K | 3K | $20.00 | Dec 30, 2024 |
| Anzalone Christopher Richard | CEO | SELL | $100K–$500K | 13K | $19.59 | Dec 23, 2024 |
| Anzalone Christopher Richard | CEO | GRANT | N/A | 100K | — | Dec 20, 2024 |
| Anzalone Christopher Richard | CEO | SELL | $500K+ | 27K | $21.24 | Dec 20, 2024 |
| Oliver Tracie | Chief Commercial O… | SELL | $100K–$500K | 9K | $25.28 | Jul 3, 2024 |
| Hamilton James C | Chief Discovery/Tr… | SELL | $100K–$500K | 6K | $28.03 | Apr 3, 2024 |
| Lu Hongbo | Director | BUY | $50K–$100K | 3K | $27.66 | Mar 20, 2024 |
| Anzalone Christopher Richard | CEO | EXERCISE | $500K+ | 57K | $14.54 | Feb 2, 2024 |
| Anzalone Christopher Richard | CEO | SELL | $1M+ | 57K | $32.35 | Feb 2, 2024 |
| Hamilton James C | Chief Discovery/Tr… | SELL | $100K–$500K | 8K | $36.89 | Jan 17, 2024 |
| GIVEN DOUGLAS B | Director | SELL | $100K–$500K | 3K | $38.06 | Jan 16, 2024 |
| Waddill William D. | Director | SELL | $100K–$500K | 4K | $38.07 | Jan 16, 2024 |
| Ferrari Mauro | Director | SELL | $100K–$500K | 3K | $38.06 | Jan 16, 2024 |
| Vakiener Victoria | Director | SELL | $100K–$500K | 5K | $38.10 | Jan 16, 2024 |
| Anzalone Christopher Richard | CEO | SELL | $100K–$500K | 10K | $31.01 | Jan 4, 2024 |
| Anzalone Christopher Richard | CEO | SELL | $100K–$500K | 12K | $28.54 | Dec 22, 2023 |
| San Martin Javier | Chief Medical Offi… | SELL | $500K+ | 20K | $28.80 | Nov 22, 2023 |
| Anzalone Christopher Richard | CEO | SELL | $500K+ | 24K | $24.21 | Oct 27, 2023 |
| Vakiener Victoria | Director | SELL | $15K–$50K | 2K | $26.33 | Oct 2, 2023 |
| Anzalone Christopher Richard | CEO | SELL | $1M+ | 58K | $28.12 | Sep 20, 2023 |
| Anzalone Christopher Richard | CEO | EXERCISE | $100K–$500K | 58K | $4.75 | Sep 20, 2023 |
| Oliver Tracie | Chief Commercial O… | SELL | $100K–$500K | 9K | $35.31 | Jul 6, 2023 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 330 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| VANGUARD GROUP INC | 14.2M | $1M+ | SH |
| STATE STREET CORP | 6.4M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 2.8M | $1M+ | SH |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.1M | $1M+ | SH |
| NORGES BANK | 1.7M | $1M+ | SH |
| Siren, L.L.C. | 1.5M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4M | $1M+ | SH |
| Fisher Asset Management, LLC | 1.3M | $1M+ | SH |
| Pictet Asset Management Holding SA | 1.0M | $1M+ | SH |
| Western Financial Corp/CA | 820K | $1M+ | SH |
| Assenagon Asset Management S.A. | 685K | $1M+ | SH |
| Connor, Clark & Lunn Investment Management Ltd. | 663K | $1M+ | SH |
| PUBLIC SECTOR PENSION INVESTMENT BOARD | 479K | $1M+ | SH |
| Bank of New York Mellon Corp | 405K | $1M+ | SH |
| Privium Fund Management B.V. | 398K | $1M+ | SH |
| BALYASNY ASSET MANAGEMENT L.P. | 376K | $1M+ | SH |
| Alyeska Investment Group, L.P. | 375K | $1M+ | SH |
| EVENTIDE ASSET MANAGEMENT, LLC | 370K | $1M+ | SH |
| RHUMBLINE ADVISERS | 352K | $1M+ | SH |
| UBS Group AG | 334K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Jan 21, 2026
15.0%
20.3M shares
SC 13D/A · Aug 15, 2025
0.0%
0 shares
SC 13G/A · Aug 14, 2025
8.3%
11.5M shares
SC 13G · Aug 11, 2025
4.6%
6.4M shares
SC 13G/A · Jul 29, 2025
11.2%
15.5M shares
SC 13G · May 13, 2025
5.1%
7.0M shares
SC 13G/A · Apr 24, 2025
13.8%
19.0M shares
SC 13D · Feb 14, 2025
9.5%
11.9M shares
SC 13G/A · Feb 14, 2025
9.6%
12.0M shares
SC 13G · Feb 5, 2025
4.8%
6.0M shares
SC 13G · Nov 14, 2024
7.2%
8.9M shares
STATE STREET CORPORATION 04-2456637
SC 13G/A · Oct 16, 2024
5.1%
6.4M shares
The Vanguard Group - 23-1945930
SC 13G/A · Apr 10, 2024
10.0%
12.4M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
9.9%
10.7M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G/A · Jan 24, 2024
6.3%
0 shares
SC 13G/A · Jan 23, 2024
12.4%
13.3M shares
The Vanguard Group - 23-1945930
SC 13G/A · Jun 9, 2023
10.1%
10.8M shares
SC 13G/A · Jan 26, 2023
12.0%
12.7M shares
SC 13G · Jan 20, 2023
12.0%
12.7M shares
SC 13G/A · Jan 27, 2022
11.5%
12.0M shares
SC 13G/A · Jan 25, 2022
11.5%
12.0M shares