BIOGEN INC.
Total Trades
28
Buys
3
Sells
17
Largest Trade
N/A
Insiders
7
Institutional Funds
883
Inst. Value
$1M+
Activist Filings
16
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Murphy Nicole | Head of Pharm Ops … | BUY | <$1K | 3 | $195.03 | Feb 18, 2026 |
| Singhal Priya | Head of Development | EXERCISE | N/A | 7K | — | Feb 10, 2026 |
| Singhal Priya | Head of Development | SELL | $500K+ | 3K | $199.83 | Feb 10, 2026 |
| Singhal Priya | Head of Development | SELL | $100K–$500K | 748 | $179.30 | Feb 3, 2026 |
| Singhal Priya | Head of Development | EXERCISE | N/A | 2K | — | Feb 3, 2026 |
| Singhal Priya | Head of Development | EXERCISE | N/A | 2K | — | Sep 2, 2025 |
| Singhal Priya | Head of Development | SELL | $50K–$100K | 517 | $133.55 | Sep 2, 2025 |
| Izzar Rachid | Head of Global Pro… | SELL | $100K–$500K | 2K | $135.00 | Jul 16, 2025 |
| Singhal Priya | Head of Development | SELL | $100K–$500K | 4K | $126.25 | May 20, 2025 |
| DORSA CAROLINE | Director | BUY | $100K–$500K | 1K | $122.72 | May 5, 2025 |
| Singhal Priya | Head of Development | SELL | $15K–$50K | 93 | $213.09 | Apr 4, 2024 |
| Singhal Priya | Head of Development | SELL | $50K–$100K | 262 | $221.23 | Feb 27, 2024 |
| Singhal Priya | Head of Development | EXERCISE | N/A | 1K | — | Feb 22, 2024 |
| Singhal Priya | Head of Development | SELL | $15K–$50K | 108 | $221.49 | Feb 22, 2024 |
| Rowinsky Eric K | Director | BUY | $100K–$500K | 455 | $222.54 | Feb 21, 2024 |
| Singhal Priya | Head of Development | SELL | $100K–$500K | 419 | $239.45 | Feb 13, 2024 |
| Singhal Priya | Head of Development | EXERCISE | N/A | 1K | — | Feb 13, 2024 |
| Singhal Priya | Head of Development | EXERCISE | N/A | 2K | — | Feb 5, 2024 |
| Singhal Priya | Head of Development | SELL | $100K–$500K | 634 | $245.93 | Feb 5, 2024 |
| Singhal Priya | Head of Development | EXERCISE | N/A | 2K | — | Sep 6, 2023 |
| Singhal Priya | Head of Development | SELL | $100K–$500K | 431 | $269.43 | Sep 6, 2023 |
| Singhal Priya | Head of Development | SELL | $15K–$50K | 81 | $282.87 | Jul 5, 2023 |
| Singhal Priya | Head of Development | EXERCISE | N/A | 315 | — | Jul 5, 2023 |
| Gregory Ginger | EVP, Human Resources | SELL | $500K+ | 3K | $300.00 | May 3, 2023 |
| Singhal Priya | Head of Development | SELL | $15K–$50K | 91 | $277.11 | Apr 6, 2023 |
| Singhal Priya | Head of Development | SELL | $100K–$500K | 568 | $270.06 | Mar 30, 2023 |
| Gregory Ginger | EVP, Human Resources | SELL | $1M+ | 6K | $300.11 | Dec 13, 2022 |
| ALEXANDER SUSAN H | EVP Chief Legal Of… | SELL | $1M+ | 6K | $280.70 | Oct 28, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 883 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| VANGUARD GROUP INC | 16.0M | $1M+ | SH |
| PRIMECAP MANAGEMENT CO/CA/ | 14.8M | $1M+ | SH |
| STATE STREET CORP | 7.2M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 3.8M | $1M+ | SH |
| Point72 Asset Management, L.P. | 2.8M | $1M+ | SH |
| NORGES BANK | 2.6M | $1M+ | SH |
| Pacer Advisors, Inc. | 1.1M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.1M | $1M+ | SH |
| Alyeska Investment Group, L.P. | 1.0M | $1M+ | SH |
| Pictet Asset Management Holding SA | 947K | $1M+ | SH |
| CIK 1600177 | 704K | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 693K | $1M+ | SH |
| Robeco Institutional Asset Management B.V. | 611K | $1M+ | SH |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 592K | $1M+ | SH |
| CAISSE DE DEPOT ET PLACEMENT DU QUEBEC | 589K | $1M+ | SH |
| Patient Capital Management, LLC | 576K | $1M+ | SH |
| FIRST TRUST ADVISORS LP | 566K | $1M+ | SH |
| CAUSEWAY CAPITAL MANAGEMENT LLC | 521K | $1M+ | SH |
| BNP PARIBAS FINANCIAL MARKETS | 508K | $1M+ | SH |
| AustralianSuper Pty Ltd | 477K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G · Feb 5, 2026
6.4%
9.4M shares
SC 13G/A · Nov 14, 2025
10.2%
15.0M shares
SC 13G · Nov 10, 2025
5.0%
7.3M shares
SC 13G/A · Apr 17, 2025
8.5%
12.5M shares
SC 13G/A · Nov 12, 2024
11.4%
16.7M shares
SC 13G/A · Nov 4, 2024
11.4%
16.7M shares
STATE STREET CORPORATION 04-2456637
SC 13G · Oct 16, 2024
5.0%
7.3M shares
SC 13G/A · Aug 7, 2024
10.1%
14.6M shares
PRIMECAP Management Company 95-3868081
SC 13G/A · Feb 12, 2024
11.2%
16.3M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 12, 2024
10.0%
14.5M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 12, 2024
9.9%
14.4M shares
SC 13G/A · Jan 24, 2024
9.8%
14.2M shares
PRIMECAP Management Company 95-3868081
SC 13G/A · Feb 9, 2023
10.9%
15.7M shares
SC 13G/A · Jan 24, 2023
9.9%
14.3M shares
SC 13G/A · Mar 7, 2022
9.4%
13.7M shares
PRIMECAP Management Company 95-3868081
SC 13G/A · Feb 10, 2022
10.7%
15.8M shares