BIIB BIOGEN INC
2026Q2 · CUSIP 09062X103 · Sector: Healthcare & Biotech
Fund flows are within the usual range
1,015 funds held BIIB at the end of 2026Q2, up 12 from the quarter before. Fund flows are within the usual range — nothing unusual. On the business itself, revenue over the last 12 months was $9.9B(YoY +1.2%), the P/E is 23.3x, return on equity is 7.4%. BIIB has had 20 buying rushes in its history, and the price moved -3.4% on average over the six months after (that is the raw price move, not how much it beat the market by). It sits in the Healthcare & Biotech sector.
How many funds owned it, quarter by quarter
Bars = net change in institutional holders, positive (green) or negative (red). Line = total institutional holders.
What happened after each past buying rush 20 times in its history
| Quarter of the rush | How unusual then | Price, next 3 months | Price, next 6 months |
|---|---|---|---|
| 2025Q4 | Top 5% | -2.2% | — |
| 2025Q3 | Top 10% | +16.6% | +14.0% |
| 2023Q4 | Top 20% | +5.2% | -5.9% |
| 2022Q4 | Top 10% | +12.5% | -3.8% |
| 2022Q3 | Top 1% in the market | -7.2% | +2.8% |
| 2021Q2 | Top 20% | -23.5% | -37.2% |
| 2021Q1 | Top 20% | +21.3% | -7.2% |
| 2019Q4 | Top 5% | -4.9% | -13.1% |
These are the raw price moves, not how much it beat the market by. Compare them against the market over the same months — in a strong bull market almost everything is up.
Show all the numbers (large funds, value held, options…) ▾ Collapse ▴
These are for people who want to dig. Skip them if they do not mean anything to you — the three numbers above are enough.
8,697 institutions have filed for this quarter. 13F permits late filing and a small number arrive in the weeks after the deadline, so the holder counts and changes below may tick up.
Fundamentals
Quarterly figures, revenue up to 10 years back; EPS split-adjusted, early quarters hidden when not calibrable
P/E = close around day 47 after quarter-end ÷ TTM EPS then; this is a consistent valuation date, not the company’s actual filing date; loss quarters hidden
FCF = operating cash flow − capex, computed from SEC XBRL; banks/insurers have no standard cash-flow structure and are hidden
As of 2026-03-31 · SEC filings (XBRL)
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2026 Q3 holdings are due 2026-11-16. We will email you when the refreshed lists are live.