Biogen Inc.
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Holders

Fund holders

Name Date reported Shares Value % Held
VANGUARD CHESTER FUNDS-Vanguard PRIMECAP Fund Sep 30, 2025 8.5M 1.3B 5.8%
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund Sep 30, 2025 4.6M 685.9M 3.2%
VANGUARD SPECIALIZED FUNDS-Vanguard Health Care Fund Jul 31, 2025 4.4M 647.6M 3.0%
VANGUARD INDEX FUNDS-Vanguard 500 Index Fund Sep 30, 2025 3.6M 536.6M 2.5%
VANGUARD INDEX FUNDS-Vanguard Mid-Cap Index Fund Sep 30, 2025 3.2M 481.0M 2.2%
Invesco QQQ Trust, Series 1 Sep 30, 2025 3.0M 449.8M 2.1%
VANGUARD HORIZON FUNDS-Vanguard Capital Opportunity Fund Sep 30, 2025 2.3M 346.5M 1.6%
Fidelity Concord Street Trust-Fidelity 500 Index Fund Sep 30, 2025 1.9M 275.3M 1.3%
iShares Trust-iShares Core S&P 500 ETF Sep 30, 2025 1.8M 266.9M 1.2%
SPDR S&P 500 ETF TRUST Sep 30, 2025 1.7M 256.5M 1.2%
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