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Quarterly
Alector, Inc. — Quarterly Financials
Quarterly figures from SEC EDGAR XBRL filings (10-Q)
These figures are extracted from XBRL-tagged quarterly reports (10-Q) that Alector, Inc. filed with the SEC. Values are as reported for each individual quarter (Q1, Q2, Q3, Q4) — not cumulative year-to-date. Negative figures indicate a loss.
Revenue — By Quarter
Quarter
Fiscal Year
Period End
Value
Filed
Q3
2025
Sep 30, 2025
$3.26M
Nov 6, 2025
Q2
2025
Jun 30, 2025
$7.87M
Aug 7, 2025
Q1
2025
Mar 31, 2025
$3.70M
May 8, 2025
Q3
2025
Sep 30, 2024
$15.34M
Nov 6, 2025
Q2
2025
Jun 30, 2024
$15.08M
Aug 7, 2025
Q1
2025
Mar 31, 2024
$15.90M
May 8, 2025
Q3
2019
Sep 30, 2019
$2.70M
Nov 12, 2019
Q2
2019
Jun 30, 2019
$6.92M
Aug 12, 2019
Q1
2019
Mar 31, 2019
$5.61M
May 13, 2019
Q3
2019
Sep 30, 2018
$6.50M
Nov 12, 2019
Q2
2019
Jun 30, 2018
$7.11M
Aug 12, 2019
Q1
2019
Mar 31, 2018
$4.92M
May 13, 2019
Revenue — By Quarter
Quarter
Fiscal Year
Period End
Value
Filed
Q3
2025
Sep 30, 2025
$3.26M
Nov 6, 2025
Q2
2025
Jun 30, 2025
$7.87M
Aug 7, 2025
Q1
2025
Mar 31, 2025
$3.67M
May 8, 2025
Q3
2025
Sep 30, 2024
$15.34M
Nov 6, 2025
Q2
2025
Jun 30, 2024
$15.08M
Aug 7, 2025
Q1
2025
Mar 31, 2024
$15.89M
May 8, 2025
Q3
2024
Sep 30, 2023
$9.11M
Nov 6, 2024
Q2
2024
Jun 30, 2023
$56.21M
Aug 7, 2024
Q1
2024
Mar 31, 2023
$16.55M
May 8, 2024
Q3
2023
Sep 30, 2022
$14.85M
Nov 7, 2023
Q2
2023
Jun 30, 2022
$79.85M
Aug 3, 2023
Q1
2023
Mar 31, 2022
$24.47M
May 4, 2023
Q3
2022
Sep 30, 2021
$182.41M
Nov 8, 2022
Q2
2022
Jun 30, 2021
$6.57M
Aug 4, 2022
Q1
2022
Mar 31, 2021
$4.11M
May 5, 2022
Q3
2021
Sep 30, 2020
$5.90M
Nov 4, 2021
Q2
2021
Jun 30, 2020
$3.17M
Aug 3, 2021
Q1
2021
Mar 31, 2020
$7.17M
May 5, 2021
Q3
2020
Sep 30, 2019
$2.70M
Nov 10, 2020
Q2
2020
Jun 30, 2019
$6.92M
Aug 11, 2020
Net Income — By Quarter
Quarter
Fiscal Year
Period End
Value
Filed
Q3
2025
Sep 30, 2025
($34.67M)
Nov 6, 2025
Q2
2025
Jun 30, 2025
($30.52M)
Aug 7, 2025
Q3
2025
Jun 30, 2025
($30.52M)
Nov 6, 2025
Q3
2025
Mar 31, 2025
($40.47M)
Nov 6, 2025
Q2
2025
Mar 31, 2025
($40.47M)
Aug 7, 2025
Q1
2025
Mar 31, 2025
($40.47M)
May 8, 2025
Q3
2025
Sep 30, 2024
($42.22M)
Nov 6, 2025
Q3
2025
Jun 30, 2024
($38.68M)
Nov 6, 2025
Q2
2025
Jun 30, 2024
($38.68M)
Aug 7, 2025
Q2
2025
Mar 31, 2024
($36.08M)
Aug 7, 2025
Q1
2025
Mar 31, 2024
($36.08M)
May 8, 2025
Q3
2025
Mar 31, 2024
($36.08M)
Nov 6, 2025
Q3
2024
Sep 30, 2023
($44.48M)
Nov 6, 2024
Q3
2024
Jun 30, 2023
$1.38M
Nov 6, 2024
Q2
2024
Jun 30, 2023
$1.38M
Aug 7, 2024
Q2
2024
Mar 31, 2023
($45.86M)
Aug 7, 2024
Q1
2024
Mar 31, 2023
($45.86M)
May 8, 2024
Q3
2024
Mar 31, 2023
($45.86M)
Nov 6, 2024
Q3
2023
Sep 30, 2022
($46.15M)
Nov 7, 2023
Q2
2023
Jun 30, 2022
$9.88M
Aug 3, 2023
Operating Income — By Quarter
Quarter
Fiscal Year
Period End
Value
Filed
Q3
2025
Sep 30, 2025
($37.61M)
Nov 6, 2025
Q2
2025
Jun 30, 2025
($34.14M)
Aug 7, 2025
Q1
2025
Mar 31, 2025
($44.70M)
May 8, 2025
Q3
2025
Sep 30, 2024
($48.43M)
Nov 6, 2025
Q2
2025
Jun 30, 2024
($45.61M)
Aug 7, 2025
Q1
2025
Mar 31, 2024
($43.71M)
May 8, 2025
Q3
2024
Sep 30, 2023
($50.58M)
Nov 6, 2024
Q2
2024
Jun 30, 2023
($3.59M)
Aug 7, 2024
Q1
2024
Mar 31, 2023
($50.12M)
May 8, 2024
Q3
2023
Sep 30, 2022
($47.75M)
Nov 7, 2023
Q2
2023
Jun 30, 2022
$9.48M
Aug 3, 2023
Q1
2023
Mar 31, 2022
($44.12M)
May 4, 2023
Q3
2022
Sep 30, 2021
$126.33M
Nov 8, 2022
Q2
2022
Jun 30, 2021
($55.33M)
Aug 4, 2022
Q1
2022
Mar 31, 2021
($52.64M)
May 5, 2022
Q3
2021
Sep 30, 2020
($53.75M)
Nov 4, 2021
Q2
2021
Jun 30, 2020
($46.59M)
Aug 3, 2021
Q1
2021
Mar 31, 2020
($42.08M)
May 5, 2021
Q3
2020
Sep 30, 2019
($34.15M)
Nov 10, 2020
Q2
2020
Jun 30, 2019
($27.15M)
Aug 11, 2020