Biogen number of employees

Biogen reported 7,500 employees at December 31, 2025 in its latest annual report, down 105 (1.4%) on the year before. That compares with 9,610 at December 31, 2021. Revenue per employee was $1.3m.

Headcount by year

Fiscal year end	Employees	Change	Revenue per employee	Source
December 31, 2025	7,500	−105 (1.4%)	$1.3m	10-K, filed February 6, 2026
December 31, 2024	7,605	+35 (0.5%)	$1.3m	10-K, filed February 12, 2025
December 31, 2023	7,570	−1,155 (13.2%)	$1.3m	10-K, filed February 14, 2024
December 31, 2022	8,725	−885 (9.2%)	$1.2m	10-K, filed February 15, 2023
December 31, 2021	9,610	—	$1.1m	10-K, filed February 3, 2022

What the annual reports say

HUMAN CAPITAL As of December 31, 2025, we had approximately 7,500 employees worldwide. 2025 annual report
HUMAN CAPITAL As of December 31, 2024, we had approximately 7,605 employees worldwide. 2024 annual report
HUMAN CAPITAL As of December 31, 2023, we had approximately 7,570 employees worldwide. 2023 annual report
Human Capital As of December 31, 2022, we had approximately 8,725 employees worldwide. 2022 annual report
Human Capital As of December 31, 2021, we had approximately 9,610 employees worldwide. 2021 annual report

Headcount as the company states it in Item 1 of its annual report (some count full-time equivalents or exclude part-time and temporary staff), at the date it gives. Years where the report states no clear total are left out rather than estimated. Changes can reflect acquisitions and disposals as well as hiring and job cuts.

Compare with peers

Head to head: BIIB vs VRTX BIIB vs REGN BIIB vs INCY

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Figures from Biogen's SEC filings (10-K and 10-Q), retrieved October 29, 2026. How we read and check them: methodology and data sources. Not investment advice. Back to Biogen.