BIIB · Biogen Inc.
$209.83
-0.82 (-0.39%)
At close · Aug 14
Market Cap
$30.98B
Shares
147.64M
Registered funds — mutual funds, ETFs and closed-end funds — whose latest Form N-PORT portfolio report holds this stock, matched by the stock's CUSIP. Each row is one fund position with its size, value and weight in that fund.
Funds holding BIIB
857 fund positions| Fund | Ticker | Balance | Value | % of Fund | Side | Reported | Open |
|---|---|---|---|---|---|---|---|
| VANGUARD PRIMECAP FUND | — | 8,359,880 | $1,532,616,800 | 2.12% | Long | 2026-03-31 | |
| VANGUARD TOTAL STOCK MARKET INDEX FUND | — | 4,654,936 | $853,389,417 | 0.04% | Long | 2026-03-31 | |
| VANGUARD 500 INDEX FUND | — | 3,730,577 | $683,926,681 | 0.05% | Long | 2026-03-31 | |
| Fidelity Contrafund | — | 3,269,520 | $599,401,102 | 0.38% | Long | 2026-03-31 | |
| VANGUARD MID-CAP INDEX FUND | — | 3,169,409 | $581,047,752 | 0.29% | Long | 2026-03-31 | |
| VANGUARD HEALTH CARE FUND | — | 2,526,097 | $478,139,640 | 1.30% | Long | 2026-04-30 | |
| VANGUARD CAPITAL OPPORTUNITY FUND | — | 2,332,567 | $427,629,508 | 1.74% | Long | 2026-03-31 | |
| Strategic Advisers Fidelity U.S. Total Stock Fund | — | 2,027,406 | $397,371,576 | 0.16% | Long | 2026-05-31 | |
| Fidelity 500 Index Fund | — | 1,878,080 | $368,103,680 | 0.04% | Long | 2026-05-31 | |
| iShares Core S&P 500 ETF | — | 1,888,033 | $346,133,090 | 0.05% | Long | 2026-03-31 | |
| State Street(R) SPDR(R) S&P 500(R) ETF Trust | SPY | 1,716,790 | $314,739,111 | 0.05% | Long | 2026-03-31 | |
| VANGUARD VALUE INDEX FUND | — | 1,357,618 | $248,892,108 | 0.11% | Long | 2026-03-31 | |
| VANGUARD PRIMECAP CORE FUND | — | 1,316,936 | $241,433,877 | 1.78% | Long | 2026-03-31 | |
| iShares Biotechnology ETF | — | 1,091,046 | $200,021,463 | 2.46% | Long | 2026-03-31 | |
| State Street(R) Health Care Select Sector SPDR(R) ETF | — | 1,067,952 | $195,787,640 | 0.51% | Long | 2026-03-31 | |
| VANGUARD MID-CAP VALUE INDEX FUND | — | 954,017 | $174,899,937 | 0.50% | Long | 2026-03-31 | |
| Invesco S&P 500 Equal Weight ETF | — | 885,775 | $167,659,492 | 0.19% | Long | 2026-04-30 | |
| VANGUARD INSTITUTIONAL INDEX FUND | — | 827,362 | $151,680,275 | 0.05% | Long | 2026-03-31 | |
| Fidelity Series Value Discovery Fund | — | 772,400 | $146,199,872 | 0.92% | Long | 2026-04-30 | |
| Disciplined Value Mid Cap Fund | — | 781,583 | $143,287,611 | 0.65% | Long | 2026-03-31 | |
| PRIMECAP Odyssey Aggressive Growth Fund | — | 712,650 | $134,890,392 | 1.99% | Long | 2026-04-30 | |
| Fidelity Contrafund K6 | — | 719,692 | $131,941,134 | 0.39% | Long | 2026-03-31 | |
| Fidelity Puritan Fund | — | 653,600 | $128,105,600 | 0.38% | Long | 2026-05-31 | |
| Pacer US Cash Cows 100 ETF | — | 642,650 | $121,640,792 | 0.67% | Long | 2026-04-30 | |
| PRIMECAP Odyssey Growth Fund | — | 615,350 | $116,473,448 | 2.14% | Long | 2026-04-30 | |
| iShares Russell Mid-Cap ETF | — | 558,815 | $102,447,554 | 0.21% | Long | 2026-03-31 | |
| Fidelity Mid Cap Index Fund | — | 541,113 | $102,421,869 | 0.20% | Long | 2026-04-30 | |
| PRIMECAP Odyssey Stock Fund | — | 533,140 | $100,912,739 | 2.27% | Long | 2026-04-30 | |
| Fidelity Low-Priced Stock Fund | — | 508,542 | $96,256,830 | 0.40% | Long | 2026-04-30 | |
| T. Rowe Price Mid-Cap Growth Fund, Inc. | — | 497,200 | $91,151,676 | 0.40% | Long | 2026-03-31 | |
| VANGUARD HEALTH CARE INDEX FUND | — | 440,787 | $86,394,252 | 0.45% | Long | 2026-05-31 | |
| State Street(R) SPDR(R) S&P(R) Biotech ETF | — | 444,855 | $81,555,267 | 1.10% | Long | 2026-03-31 | |
| First Trust NYSE Arca Biotechnology Index Fund | — | 429,853 | $78,804,950 | 3.47% | Long | 2026-03-31 | |
| MFS Mid Cap Value Fund | — | 414,847 | $76,053,901 | 0.48% | Long | 2026-03-31 | |
| BlackRock Health Sciences Opportunities Portfolio | — | 364,188 | $71,380,848 | 1.21% | Long | 2026-05-29 | |
| Select Biotechnology Portfolio | — | 338,835 | $66,411,660 | 1.26% | Long | 2026-05-31 | |
| Schwab S&P 500 Index Fund | — | 326,585 | $61,816,009 | 0.04% | Long | 2026-04-30 | |
| iShares Russell 1000 Value ETF | — | 335,747 | $61,552,498 | 0.09% | Long | 2026-03-31 | |
| State Street(R) SPDR(R) Portfolio S&P 500(R) ETF | — | 308,328 | $56,525,772 | 0.05% | Long | 2026-03-31 | |
| Fidelity Advisor Biotechnology Fund | — | 294,100 | $55,667,248 | 2.92% | Long | 2026-04-30 | |
| Fidelity Total Market Index Fund | — | 277,399 | $54,370,204 | 0.04% | Long | 2026-05-31 | |
| CAPITAL GROWTH PORTFOLIO | — | 263,550 | $48,316,622 | 2.10% | Long | 2026-03-31 | |
| iShares S&P 500 Value ETF | — | 253,224 | $46,423,556 | 0.10% | Long | 2026-03-31 | |
| Patient Opportunity Trust | — | 250,000 | $45,832,500 | 2.64% | Long | 2026-03-31 | |
| Fidelity Series Total Market Index Fund | — | 224,345 | $43,971,620 | 0.04% | Long | 2026-05-31 | |
| Fidelity SAI U.S. Low Volatility Index Fund | — | 231,638 | $43,844,441 | 0.21% | Long | 2026-04-30 | |
| T. Rowe Price Equity Income Fund | — | 237,000 | $43,449,210 | 0.27% | Long | 2026-03-31 | |
| ALGER FOCUS EQUITY FUND | — | 205,149 | $38,830,603 | 0.64% | Long | 2026-04-30 | |
| iShares Russell Mid-Cap Value ETF | — | 210,347 | $38,562,916 | 0.27% | Long | 2026-03-31 | |
| Goldman Sachs ActiveBeta(R) U.S. Large Cap Equity ETF | — | 183,560 | $35,977,760 | 0.23% | Long | 2026-05-31 |
Showing 1–50 of 857 positions
Key facts
CIK
875045
CUSIP
09062X103
13F (30d)
947 filings
910 filers
Visit website
Investor relations