Biogen Inc.

BIIB Healthcare Drug Manufacturers General

Biogen Inc.’s revenue for fiscal 2025 (year ended December 2025) was $9.9 billion, up 2.22% from fiscal 2024.

Revenue
+10.6%
EPS
−104.4%
Free cash flow
−69.3%
Total debt
+16.0%

Quarter to September 2026, against a year earlier

248.66 4.73 +1.94%
Market cap
$36.1B
P/E
104×
Fwd P/E
47.4×
Dividend yield
—
F-score
4/9
Altman Z
3.13
Beneish M
−2.67
Dividend safety
n/a

Biogen Inc. (BIIB) Shares outstanding

Alert me on Shares outstanding

Biogen Inc.'s shares outstanding at the end of fiscal 2025 was $147.1M, unchanged from fiscal 2024. At the end of the quarter to 30 September 2026 it was $147.8M. Over the past ten years it has ranged from $145.6M (fiscal 2023) to $231.2M (fiscal 2015); the current reading is higher than 36% of that period. Biogen Inc. ranks 16th of 20 Drug Manufacturers General companies by shares outstanding.

Shares outstanding, annual

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Annual newest first

Period Shares outstanding Change
FY2025 $147.1M 0.82%
FY2024 $145.9M 0.21%
FY2023 $145.6M (0.27%)
FY2022 $146.0M (2.41%)
FY2021 $149.6M (7.25%)
FY2020 $161.3M (13.93%)
FY2019 $187.4M (8.72%)
FY2018 $205.3M (3.62%)
FY2017 $213.0M (2.65%)
FY2016 $218.8M (5.36%)

Quarterly newest first

Period Shares outstanding Change
Sep 2026 $147.8M (0.61%)
Jun 2026 $148.7M 0.20%
Mar 2026 $148.4M 0.88%
Dec 2025 $147.1M 0.00%
43 more quarters

Against its own ten years

Low $145.6M High $231.2M
Ten-year median $161.3M
Current reading's percentile 36

Shares outstanding against peers

What Shares outstanding is

Shares (Diluted, Weighted) tells an investor how many shares a company’s earnings are spread across once potential new shares are counted.

Reported line item

The full definition of Shares outstanding →

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