As of the latest SEC filings, BIOGEN INC. (BIIB) is held by 776 institutional funds. The largest fund shareholder is VANGUARD PRIMECAP FUND (VPMAX), holding an estimated $1,532,616,800.40 in market value, representing 2.12% of its portfolio.
Funds holding BIOGEN INC. (BIIB)
Source: SEC Form N-PORT institutional portfolio disclosures
- Ticker:
- BIIB
- CIK:
- 0000875045
| Fund | Type | Manager | Weight | Market Value | Shares |
Report Date
|
Filing Date
|
|---|---|---|---|---|---|---|---|
|
VPMAX
VANGUARD PRIMECAP FUND
|
MF | Vanguard | 2.12% | $1,532,616,800.40 | 8,359,880 | Mar 31, 2026 | May 28, 2026 |
|
VTI
VANGUARD TOTAL STOCK MARKET INDEX FUND
|
ETF | Vanguard | 0.04% | $853,389,416.88 | 4,654,936 | Mar 31, 2026 | May 28, 2026 |
|
VFIAX
VANGUARD 500 INDEX FUND
|
ETF | Vanguard | 0.05% | $683,926,681.41 | 3,730,577 | Mar 31, 2026 | May 28, 2026 |
|
FCNTX
Fidelity Contrafund
|
MF | Fidelity | 0.38% | $599,401,101.60 | 3,269,520 | Mar 31, 2026 | May 26, 2026 |
|
VO
VANGUARD MID-CAP INDEX FUND
|
ETF | Vanguard | 0.29% | $581,047,751.97 | 3,169,409 | Mar 31, 2026 | May 28, 2026 |
|
VGHAX
VANGUARD HEALTH CARE FUND
|
MF | Vanguard | 1.30% | $478,139,640.16 | 2,526,097 | Apr 30, 2026 | Jun 26, 2026 |
|
VHCAX
VANGUARD CAPITAL OPPORTUNITY FUND
|
MF | Vanguard | 1.74% | $427,629,508.11 | 2,332,567 | Mar 31, 2026 | May 28, 2026 |
|
FXAIX
Fidelity 500 Index Fund
|
MF | Fidelity | 0.05% | $358,122,377.22 | 1,866,971 | Feb 28, 2026 | Apr 24, 2026 |
|
IVV
iShares Core S&P 500 ETF
|
ETF | BlackRock / iShares | 0.05% | $346,133,089.89 | 1,888,033 | Mar 31, 2026 | May 28, 2026 |
|
SPY
SPDR S&P 500 ETF Trust
|
ETF | State Street (SPDR) | 0.05% | $314,739,110.70 | 1,716,790 | Mar 31, 2026 | May 28, 2026 |
|
VIVAX
VANGUARD VALUE INDEX FUND
|
ETF | Vanguard | 0.11% | $248,892,107.94 | 1,357,618 | Mar 31, 2026 | May 28, 2026 |
|
VPCCX
VANGUARD PRIMECAP CORE FUND
|
MF | Vanguard | 1.78% | $241,433,876.88 | 1,316,936 | Mar 31, 2026 | May 28, 2026 |
|
FCTDX
Strategic Advisers Fidelity U.S. Total Stock Fund
|
MF | Fidelity | 0.11% | $238,310,646.12 | 1,242,366 | Feb 28, 2026 | Apr 24, 2026 |
|
IBB
iShares Biotechnology ETF
|
ETF | BlackRock / iShares | 2.46% | $200,021,463.18 | 1,091,046 | Mar 31, 2026 | May 28, 2026 |
|
XLV
State Street(R) Health Care Select Sector SPDR(R) ETF
|
ETF | State Street (SPDR) | 0.51% | $195,787,640.16 | 1,067,952 | Mar 31, 2026 | May 28, 2026 |
|
VMVAX
VANGUARD MID-CAP VALUE INDEX FUND
|
ETF | Vanguard | 0.50% | $174,899,936.61 | 954,017 | Mar 31, 2026 | May 28, 2026 |
|
RSP
Invesco S&P 500 Equal Weight ETF
|
ETF | Invesco | 0.19% | $167,659,492.00 | 885,775 | Apr 30, 2026 | Jun 29, 2026 |
|
VIIIX
VANGUARD INSTITUTIONAL INDEX FUND
|
MF | Vanguard | 0.05% | $151,680,275.46 | 827,362 | Mar 31, 2026 | May 28, 2026 |
|
FNKLX
Fidelity Series Value Discovery Fund
|
MF | Fidelity | 0.92% | $146,199,872.00 | 772,400 | Apr 30, 2026 | Jun 26, 2026 |
|
JVMAX
Disciplined Value Mid Cap Fund
|
MF | John Hancock | 0.65% | $143,287,611.39 | 781,583 | Mar 31, 2026 | May 29, 2026 |
|
POAGX
PRIMECAP Odyssey Aggressive Growth Fund
|
MF | Independent / Boutique | 1.99% | $134,890,392.00 | 712,650 | Apr 30, 2026 | Jun 29, 2026 |
|
FLCNX
Fidelity Contrafund K6
|
MF | Fidelity | 0.39% | $131,941,134.36 | 719,692 | Mar 31, 2026 | May 26, 2026 |
|
FPURX
Fidelity Puritan Fund
|
MF | Fidelity | 0.38% | $123,589,626.00 | 644,300 | Feb 28, 2026 | Apr 24, 2026 |
|
COWZ
Pacer US Cash Cows 100 ETF
|
ETF | Pacer | 0.67% | $121,640,792.00 | 642,650 | Apr 30, 2026 | Jun 29, 2026 |
|
POGRX
PRIMECAP Odyssey Growth Fund
|
MF | Independent / Boutique | 2.14% | $116,473,448.00 | 615,350 | Apr 30, 2026 | Jun 29, 2026 |
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