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Company Profile

BIIB insider trades (13 months) →

Today's multi-factor rank: 99 of 466 · see the ranking

Biogen Inc. (BIIB): Quantitative Analysis

Biogen Inc. (BIIB) — Healthcare — Drug Manufacturers - General. BIIB is in the S&P 500 today. Model factor scores and market data, recalculated every trading day.

So far in 2026, BIIB has returned +22.5% against +12.2% for the S&P 500 (SPY): total return, dividends included on both sides, from Dec 31, 2025 to Sep 18, 2026.

BIIB ranks 99 of 466 on today's multifactor score, and 13 of the 55 Healthcare companies that score. Its strongest factor is momentum (Z 0.85, ranked 65 of 497); its weakest is growth (Z -0.42, ranked 398 of 494). Each factor ranks only the companies with data for it, and the multifactor score only those with all four: that is why the totals differ.

Factor scores

The Z-Score is how many standard deviations the company sits from the index average: 0 is average, positive is better than average, negative is worse.

FactorZ-ScoreRank
Multifactor0.21699 of 466 ↑18
Momentum0.85365 of 497 ↑21
Value0.179164 of 494 ↑1
Quality0.254128 of 473 =
Growth-0.424398 of 494 =

Market data

MetricValue
Price$215.50
Market Cap31.84B
P/E38.90
Revenue (last 12 months)10.03B
Price / book1.69
Book value per share$127.61
52-week range$135.39 – $225.80
Beta0.17
Average volume1,105,890
Shares outstanding147.75M
Short interest (% of float)4.32% (as of Aug 31, 2026)

When does BIIB report earnings? 12 of its last 12, before the open →

What are BIIB insiders doing? 50 transactions filed with the SEC, of them 1 buy and 5 sells, the last one on Aug 4, 2026 →

Data as of Sep 18, 2026. Source: point-in-time SEC fundamentals and closing prices. Method and formulas are on the home page.

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S&P 500 market gravity