KOPPERS HOLDINGS INC. Unrecognized Tax Benefits that Would Impact Effective Tax Rate
KOPPERS HOLDINGS INC. (KOP) had Unrecognized Tax Benefits that Would Impact Effective Tax Rate of $1.20 million as of 2026-06-30, per its 10-Q filed 2026-08-06.
Financial Statements › Notes › Income Taxes › Income Tax Uncertainties
us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate · last filed 2026-08-06
- 2026-06-30: Unrecognized Tax Benefits that Would Impact Effective Tax Rate $1.20M.
- 2026-03-31: Unrecognized Tax Benefits that Would Impact Effective Tax Rate $1.10M.
- 2025-12-31: Unrecognized Tax Benefits that Would Impact Effective Tax Rate $1.10M.
- 2025-09-30: Unrecognized Tax Benefits that Would Impact Effective Tax Rate $1.00M.
| Period end | Unrecognized Tax Benefits that Would Impact Effective Tax Rate |
|---|---|
| 2026-06-30 | $1.20M 10-Q · filed 2026-08-06 |
| 2026-03-31 | $1.10M 10-Q · filed 2026-05-08 |
| 2025-12-31 | $1.10M 10-Q · filed 2026-08-06 |
| 2025-09-30 | $1.00M 10-Q · filed 2025-11-07 |
| 2024-12-31 | $1.00M 10-K · filed 2026-02-26 |
| 2023-12-31 | $1.50M 10-K · filed 2025-02-27 |
| 2023-06-30 | $1.50M 10-Q · filed 2023-08-03 |
| 2023-03-31 | $1.40M 10-Q · filed 2023-05-05 |
| 2022-12-31 | $1.40M 10-K · filed 2024-02-28 |
| 2022-09-30 | $1.40M 10-Q · filed 2022-11-04 |
| 2022-06-30 | $1.50M 10-Q · filed 2022-08-04 |
| 2022-03-31 | $1.50M 10-Q · filed 2022-05-06 |
| 2021-12-31 | $1.50M 10-K · filed 2023-02-27 |
| 2021-09-30 | $2.30M 10-Q · filed 2021-11-04 |
| 2021-06-30 | $2.50M 10-Q · filed 2021-08-06 |
| 2021-03-31 | $2.40M 10-Q · filed 2021-05-07 |
| 2020-12-31 | $2.50M 10-K · filed 2022-02-23 |
| 2020-09-30 | $1.90M 10-Q · filed 2020-11-04 |
| 2020-06-30 | $2.10M 10-Q · filed 2020-08-05 |
| 2020-03-31 | $2.10M 10-Q · filed 2020-05-07 |
| 2019-12-31 | $2.00M 10-K · filed 2021-02-24 |
| 2019-09-30 | $2.00M 10-Q · filed 2019-11-07 |
| 2019-06-30 | $2.30M 10-Q · filed 2019-08-08 |
| 2019-03-31 | $2.30M 10-Q · filed 2019-05-03 |
| 2018-12-31 | $3.70M 10-K · filed 2020-02-27 |
| 2018-09-30 | $4.20M 10-Q · filed 2018-11-08 |
| 2018-06-30 | $4.50M 10-Q · filed 2018-08-09 |
| 2018-03-31 | $4.50M 10-Q · filed 2018-05-03 |
| 2017-12-31 | $4.40M 10-K · filed 2019-03-01 |
| 2017-09-30 | $2.90M 10-Q · filed 2017-11-09 |
| 2017-06-30 | $3.00M 10-Q · filed 2017-08-03 |
| 2017-03-31 | $6.10M 10-Q · filed 2017-05-08 |
| 2016-12-31 | $5.70M 10-K · filed 2018-02-27 |
| 2016-09-30 | $5.40M 10-Q · filed 2016-11-03 |
| 2016-06-30 | $4.50M 10-Q · filed 2016-08-04 |
| 2016-03-31 | $4.30M 10-Q · filed 2016-05-06 |
| 2015-12-31 | $4.10M 10-K · filed 2017-02-24 |
| 2015-09-30 | $4.00M 10-Q · filed 2015-11-05 |
| 2015-06-30 | $5.50M 10-Q · filed 2015-08-06 |
| 2015-03-31 | $5.50M 10-Q · filed 2015-05-08 |
| 2014-12-31 | $6.00M 10-K · filed 2016-02-29 |
| 2014-09-30 | $4.50M 10-Q · filed 2014-11-10 |
| 2014-06-30 | $4.70M 10-Q · filed 2014-08-07 |
| 2014-03-31 | $4.60M 10-Q · filed 2014-05-07 |
| 2013-12-31 | $4.50M 10-K · filed 2015-03-02 |
| 2013-09-30 | $4.40M 10-Q · filed 2013-11-07 |
| 2013-06-30 | $4.90M 10-Q · filed 2013-08-08 |
| 2013-03-31 | $5.70M 10-Q · filed 2013-05-03 |
| 2012-12-31 | $5.50M 10-K · filed 2014-03-03 |
| 2012-09-30 | $5.00M 10-Q · filed 2012-11-09 |
| 2012-06-30 | $5.40M 10-Q · filed 2012-08-09 |
| 2012-03-31 | $7.30M 8-K · filed 2012-06-27 |
| 2011-12-31 | $7.10M 10-K · filed 2013-02-25 |
| 2010-12-31 | $3.50M 8-K · filed 2012-06-27 |
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