Unrecognized Tax Benefits of ESS Tech, Inc. from 31 Dec 2019 to 31 Dec 2025

Taxonomy & unit: us-gaap: USD
Description: Amount of unrecognized tax benefits.
Summary: ESS Tech, Inc. quarterly Unrecognized Tax Benefits in USD history and change rate from 31 Dec 2019 to 31 Dec 2025.
ESS Tech, Inc. Unrecognized Tax Benefits for the quarter ending 31 Dec 2025 was $2,079,000, a 16% increase year-over-year.
Source SEC data: View on sec.gov

Unrecognized Tax Benefits, Quarterly (USD)

Unrecognized Tax Benefits, YoY Quarterly Change (%)

ESS Tech, Inc. Quarterly Unrecognized Tax Benefits (USD)

Period	Value	YoY Chg	Change %	Date	Report	Filed	Fiscal Year	Fiscal Period
Q4 2025	$2,079,000	+$293,000	+16%	31 Dec 2025	10-K	05 Mar 2026	2025	FY
Q4 2024	$1,786,000	+$329,000	+23%	31 Dec 2024	10-K	05 Mar 2026	2025	FY
Q4 2023	$1,457,000	+$552,000	+61%	31 Dec 2023	10-K	05 Mar 2026	2025	FY
Q4 2022	$905,000	+$613,000	+210%	31 Dec 2022	10-K	31 Mar 2025	2024	FY
Q4 2021	$292,000	+$245,000	+521%	31 Dec 2021	10-K	14 Mar 2024	2023	FY
Q3 2021	$0	$0		30 Sep 2021	10-Q	22 Nov 2021	2021	Q3
Q2 2021	$0			30 Jun 2021	10-Q/A	06 Dec 2021	2021	Q2
Q1 2021	$0			31 Mar 2021	10-Q/A	06 Dec 2021	2021	Q1
Q4 2020	$47,000	+$35,000	+292%	31 Dec 2020	10-K	02 Mar 2023	2022	FY
Q3 2020	$0			30 Sep 2020	10-Q	16 Nov 2020	2020	Q3
Q4 2019	$12,000			31 Dec 2019	10-K	04 Mar 2022	2021	FY

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