Biogen (BIIB) Revenue — Quarter Ended Dec 31, 2025
Revenue declined in the quarter, continuing the downward trajectory seen in the trailing twelve months. The decrease was steeper sequentially than the year-over-year drop.
Key takeaway
Quarter ended Dec 31, 2025 · FY2025 Q4
Revenue declined in the quarter, continuing the downward trajectory seen in the trailing twelve months. The decrease was steeper sequentially than the year-over-year drop.
Financial snapshot
Reported revenue, sequential change, year-over-year change, and trailing four-quarter revenue.
Quarter revenue
$2.3B
Revenue reported for this quarter.
Quarter-over-quarter
-10.1%
Change from the immediately preceding quarter.
Year-over-year
-7.1%
Change from the comparable year-ago quarter.
Trailing four quarters
$9.9B
Sum of the latest four reported quarters.
Quarterly revenue trend
The latest four reported quarters with year-over-year comparisons.
| Period ended | Revenue | Year-over-year change |
|---|---|---|
| Mar 31, 2025 | $2.4B | +6.1% |
| Jun 30, 2025 | $2.6B | +7.3% |
| Sep 30, 2025 | $2.5B | +2.8% |
| Dec 31, 2025 | $2.3B | -7.1% |
Revenue performance
Reported revenue fell compared to both the prior quarter and the same quarter last year. The sequential decline was more pronounced than the annual decline.
Quarterly comparison
Compared to the immediately preceding quarter, revenue decreased, while the year-ago quarter also showed a decline, though the sequential drop was larger.
What to watch
Monitor whether the revenue trend continues to deteriorate in upcoming quarters.