Backer Marianne De serves as Executive at ARROWHEAD PHARMACEUTICALS, INC., where they oversee executive responsibilities. Since joining the company, Backer Marianne De has executed 29 insider transactions totaling $1.8M, demonstrating a bearish approach to their equity position. Their most recent transaction on Feb 24, 2026 involved selling 14,762 shares valued at $140.7K.
Backer Marianne De currently holds 1,020,704 shares of ARROWHEAD PHARMACEUTICALS, INC. (ARWR), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Backer Marianne De has been a net seller of ARWR stock. They have purchased $232.6K and sold $1.6M worth of shares.
Backer Marianne De's most recent insider trade was on Feb 24, 2026, when they sold 14,762 shares at $9.53 per share.
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| $N/A |
| Discretionary |
| Jun 12, 2024 | VIR | $0 | Other | 53,118 | $N/A | Discretionary |
| Apr 3, 2024 | VIR | $690.5K | Sale | 72,995 | $9.46 | Planned |
| Feb 22, 2024 | VIR | $0 | Award | 175,000 | $N/A | Discretionary |
| Apr 3, 2023 | VIR | $0 | Award | 576,452 | $N/A | Discretionary |
| Jan 10, 2023 | ARWR | $0 | Award | 7,867 | $N/A | Discretionary |
| Jun 22, 2022 | KRON | $0 | Award | 11,333 | $N/A | Discretionary |
| Jan 7, 2022 | ARWR | $0 | Award | 6,400 | $N/A | Discretionary |
| Jan 3, 2022 | ARWR | $18.0K | Sale | 272 | $66.25 | Discretionary |
| Jan 3, 2022 | ARWR | $144.2K | Sale | 2,244 | $64.25 | Discretionary |
| Jan 3, 2022 | ARWR | $129.0K | Sale | 1,984 | $65.01 | Discretionary |
| Dec 1, 2021 | KRON | $13.3K | Purchase | 1,150 | $11.57 | Discretionary |
| Aug 20, 2021 | KRON | $9.8K | Purchase | 500 | $19.50 | Discretionary |
| Aug 20, 2021 | KRON | $9.8K | Purchase | 500 | $19.63 | Discretionary |
| Jun 24, 2021 | ARWR | $449.3K | Sale | 5,000 | $89.85 | Discretionary |
| May 28, 2021 | KRON | $15.0K | Purchase | 600 | $25.01 | Discretionary |
| Jan 1, 2021 | ARWR | $0 | Award | 9,000 | $N/A | Discretionary |
| Oct 8, 2020 | ARWR | $25.5K | Purchase | 500 | $50.93 | Discretionary |
| Oct 8, 2020 | ARWR | $25.0K | Purchase | 500 | $50.00 | Discretionary |
| Jun 15, 2020 | ARWR | $15.7K | Purchase | 500 | $31.33 | Discretionary |
| Apr 15, 2020 | ARWR | $17.7K | Purchase | 500 | $35.40 | Discretionary |
| Mar 16, 2020 | ARWR | $12.0K | Purchase | 500 | $23.94 | Discretionary |
| Mar 12, 2020 | ARWR | $12.4K | Purchase | 500 | $24.80 | Discretionary |
| Mar 11, 2020 | ARWR | $14.3K | Purchase | 500 | $28.60 | Discretionary |
| Feb 28, 2020 | ARWR | $17.2K | Purchase | 500 | $34.39 | Discretionary |
| Feb 27, 2020 | ARWR | $17.5K | Purchase | 500 | $35.07 | Discretionary |
| Jan 13, 2020 | ARWR | $27.5K | Purchase | 500 | $54.95 | Discretionary |
| Jan 1, 2020 | ARWR | $0 | Award | 7,500 | $N/A | Discretionary |