Alector, Inc. Operating Income Loss

• Alector, Inc. showed a decrease of -7.6% in Operating Income Loss from 2024 to 2025.
• This data is from Alector, Inc.'s annual report (Form 10-K), filed with the SEC on February 25, 2026.
• XBRL data for this metric is available from 2017 to 2025 (9 years of filings). Earlier data may not exist in machine-readable XBRL format as companies adopted electronic filing at different times.
• Over the full 9 years of available data (2017 to 2025), Alector, Inc.'s Operating Income Loss has declined by 377.4%.
• Historical annual values: Fiscal year 2025: -$156.01 million | Fiscal year 2024: -$145.00 million | Fiscal year 2023: -$151.74 million | Fiscal year 2022: -$137.83 million | Fiscal year 2021: -$37.36 million | Fiscal year 2020: -$195.17 million | Fiscal year 2019: -$114.40 million | Fiscal year 2018: -$57.29 million | Fiscal year 2017: -$32.68 million.
• Data sourced from SEC EDGAR public filings as of June 24, 2026.

Last verified: June 24, 2026