Alector, Inc. Quarterly Unrecognized Tax Benefits in USD from Q4 2017 to Q4 2023

Taxonomy & unit: us-gaap: USD
Description: Amount of unrecognized tax benefits.
Summary: Alector, Inc. quarterly Unrecognized Tax Benefits history and growth rate from Q4 2017 to Q4 2023.
Alector, Inc. Unrecognized Tax Benefits for the quarter ending December 31, 2023 was $20.2M, a 33.5% increase year-over-year.

Unrecognized Tax Benefits, Quarterly (USD)

Unrecognized Tax Benefits, YoY Quarterly Growth (%)

Period	Value	YoY Chg	Change %	Date	Report	Filed
Q4 2023	$20.2M	+$5.07M	+33.5%	Dec 31, 2023	10-K	2024-02-27
Q4 2022	$15.1M	+$8.2M	+118%	Dec 31, 2022	10-K	2024-02-27
Q4 2021	$6.94M	+$2.35M	+51.1%	Dec 31, 2021	10-K	2024-02-27
Q4 2020	$4.59M	+$1.56M	+51.3%	Dec 31, 2020	10-K	2023-02-28
Q4 2019	$3.04M	+$1.53M	+101%	Dec 31, 2019	10-K	2022-02-24
Q4 2018	$1.51M	+$877K	+139%	Dec 31, 2018	10-K	2021-02-25
Q4 2017	$630K			Dec 31, 2017	10-K	2020-03-24

* An asterisk sign (*) next to the value indicates that the value is likely invalid.