BIIB position history
The shares of Biogen (BIIB) that Palo Alto Investors LP reported in each quarter’s 13F.
Shares held by quarter
New Add Reduce Exit
- 2021 Q3: 361,600 shares, $102M, 6.2% of portfolio
- 2021 Q4: 385,000 shares, $92M, 5.9% of portfolio, Add +6.5%
- 2022 Q1: 360,981 shares, $76M, 5.9% of portfolio, Reduce −6.2%
- 2022 Q2: 360,981 shares, $74M, 6.4% of portfolio
- 2022 Q3: 360,981 shares, $96M, 7.6% of portfolio
- 2022 Q4: 380,082 shares, $105M, 9.0% of portfolio, Add +5.3%
- 2023 Q1: 381,282 shares, $106M, 8.8% of portfolio, Add +0.3%
- 2023 Q2: 381,282 shares, $109M, 8.8% of portfolio
- 2023 Q3: 381,282 shares, $98M, 9.3% of portfolio
- 2023 Q4: 760,834 shares, $197M, 17.8% of portfolio, Add +99.5%
- 2024 Q1: 289,958 shares, $63M, 7.1% of portfolio, Reduce −61.9%
- 2024 Q2: 289,050 shares, $67M, 7.8% of portfolio, Reduce −0.3%
- 2024 Q3: 228,916 shares, $44M, 5.8% of portfolio, Reduce −20.8%
- 2024 Q4: 190,148 shares, $29M, 4.5% of portfolio, Reduce −16.9%
- 2025 Q1: 204,923 shares, $28M, 5.3% of portfolio, Add +7.8%
- 2025 Q2: 205,759 shares, $26M, 5.5% of portfolio, Add +0.4%
- 2025 Q3: 185,661 shares, $26M, 4.8% of portfolio, Reduce −9.8%
- 2025 Q4: 183,571 shares, $32M, 4.5% of portfolio, Reduce −1.1%
- 2026 Q1: 140,719 shares, $26M, 3.9% of portfolio, Reduce −23.3%
- 2026 Q2: 140,279 shares, $30M, 4.2% of portfolio, Reduce −0.3%
| Holdings date | Value | % of holdings | Shares | Filing date | All 13F holders |
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