Biogen's GAAP net income for 9 months of 2023 was $0.913 billion, down 2.6 times from $2.412 billion in the prior year. Revenue declined 2.4% to $7.449 billion from $7.629 billion a year earlier.

Biogen's GAAP net income for 6 months of 2023 was $0.981 billion, down 23.2% from $1.277 billion in the prior year. Revenue declined 3.9% to $4.919 billion compared to $5.121 billion a year earlier.

Biogen's GAAP net income for 3 months of 2023 was $387.6 million, up 77.4% from $218.5 million in the previous year. Revenue decreased 2.7% to $2.463 billion from $2.532 billion a year earlier.

Biogen's GAAP net income for 2022 was $2.962 billion, up 71.4% from $1.728 billion the previous year. Revenue declined 7.4% to $10.173 billion from $10.982 billion a year earlier.