Amylyx Pharmaceuticals (AMLX) Tax Rate (2022 - 2025)

Amylyx Pharmaceuticals' Tax Rate history runs 4 years deep, the most recent figure standing at 0.04% for Q4 2025.

• In Q4 2025, Tax Rate fell 223.0% year-over-year to 0.04%; the TTM figure through Dec 2025 stood at 41.07% (down 4128.0% YoY), while the FY2025 annual figure was 41.07%, down 4128.0% from the prior year.
• Tax Rate was 0.04% for Q4 2025 at Amylyx Pharmaceuticals, down from 2.27% in the prior quarter.
• In the past five years, Tax Rate ranged from a high of 39.28% in Q4 2023 to a low of 12.12% in Q1 2023.
• Historically, Tax Rate has averaged 3.84% across 4 years, with a median of 0.04% in 2025.
• The sharpest annual moves came in 2023 and 2024: Tax Rate surged 4066 bps in 2023, then tumbled 3701 bps in 2024.
• A 4-year view of Tax Rate shows it stood at 1.37% in 2022, then jumped by 2958 bps to 39.28% in 2023, then tumbled by 94 bps to 2.27% in 2024, then plunged by 98 bps to 0.04% in 2025.
• The last three Tax Rate figures came in at 0.04% (Q4 2025), 2.27% (Q4 2024), and 0.2% (Q1 2024), per Business Quant data.