BIIB vs MRNA
Biogen and Moderna, side by side.
Prices and company dataas of yesterday's close
- BIIBBuy more27%
Biogen's report on Oct 28 beat profit forecasts by 27%, and analysts expect profit to grow 30% next year.
- MRNASell some130%
Moderna's report on Nov 6 beat profit forecasts by 130%, but the stock rose 11% over the past month, in step with other biotech stocks (up 12%).
Percent return
- BIIB+58.81%
- MRNA+841.65%
Nov 11, 2025 to Nov 11, 2026
Where they differ
- Company size: BIIB $30.0B, MRNA $23.7B.
- Sales growth, 1 yr: BIIB +2.3%, MRNA +13%. MRNA is ahead.
- Profit per $1 of sales: BIIB 24¢, MRNA −81¢. BIIB is ahead.
- Cash minus debt: BIIB −$6.50B, MRNA +$3.75B. MRNA is ahead.
- Price change, 1 yr: BIIB +59%, MRNA +842%. MRNA is ahead. S&P 500 +12%.
- How much the price swings: BIIB 35%, MRNA 196%. BIIB is ahead.
BIIB: our only Buy more, with wider profit margins
Our pick of these: Biogen
Keeps 23.5% of sales as operating profit, vs −80.8%
BIIB 23.5%, MRNA −80.8%.+4.9% to the average analyst target, vs −41.6%
BIIB +4.9%, MRNA −41.6%.69% of analysts rate it a buy, vs 17%
BIIB 69%, MRNA 17%.Where it loses: MRNA has faster sales growth, +13.1% vs +2.3%
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Prices as of yesterday, 3:59 PM ET. A view, not advice.