Form type | Sec Links | Description | Filing date | Reporting date |
---|---|---|---|---|
10-K | Report | Data | 10-K | Feb 17, 2023 | Dec 31, 2022 |
10-K | Report | Data | 10-K | Feb 11, 2022 | Dec 31, 2021 |
10-K | Report | Data | 10-K | Feb 12, 2021 | Dec 31, 2020 |
10-K | Report | Data | 10-K | Feb 13, 2020 | Dec 31, 2019 |
10-K | Report | Data | FORM 10-K 2018 | Feb 12, 2019 | Dec 31, 2018 |
10-K | Report | Data | FORM 10-K 2017 | Feb 13, 2018 | Dec 31, 2017 |
10-K | Report | Data | FORM 10-K 12.31.16 | Feb 17, 2017 | Dec 31, 2016 |
10-K | Report | Data | 10-K | Feb 11, 2016 | Dec 31, 2015 |
10-K | Report | Data | 10-K NORTHWESTERN CORPORATION | Feb 12, 2015 | Dec 31, 2014 |
10-K | Report | Data | FORM 10-K DECEMBER 31, 2013 | Feb 19, 2014 | Dec 31, 2013 |
10-K | Report | Data | 10-K | Feb 14, 2013 | Dec 31, 2012 |
10-K | Report | Data | NORTHWESTERN CORPORATION FORM 10-K | Feb 16, 2012 | Dec 31, 2011 |
10-K | Report | Data | Feb 11, 2011 | Dec 31, 2010 | |
10-K | Report | 10-K 12/31/2009 | Feb 12, 2010 | Feb 11, 2010 |