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| Form | Report Date | Filing Date | Description |
|---|---|---|---|
| 8-K | 2025-12-15 | 2025-12-15 | 8-K |
| 8-K | 2025-12-10 | 2025-12-11 | 8-K |
| 10-Q | 2025-09-30 | 2025-10-31 | 10-Q |
| 8-K | 2025-10-05 | 2025-10-06 | 8-K |
| 8-K | 2025-10-03 | 2025-10-03 | 8-K |
| 10-Q | 2025-06-30 | 2025-08-07 | 10-Q |
| 8-K | 2025-07-09 | 2025-07-14 | 8-K |
| 8-K | 2025-05-13 | 2025-05-15 | 8-K |
| 10-Q | 2025-03-31 | 2025-05-08 | 10-Q |
| 8-K | 2025-04-16 | 2025-04-16 | 8-K |
| 8-K | 2025-03-11 | 2025-03-11 | 8-K |
| 10-K | 2024-12-31 | 2025-02-13 | 10-K |
| 8-K | 2025-01-24 | 2025-01-24 | 8-K |
| 8-K | 2024-12-19 | 2024-12-19 | 8-K |
| 10-Q | 2024-09-30 | 2024-10-30 | 10-Q |
| 8-K | 2024-08-21 | 2024-08-21 | 8-K |
| 10-Q | 2024-06-30 | 2024-08-01 | 10-Q |
| 8-K | 2024-05-14 | 2024-05-20 | 8-K |
| 10-Q | 2024-03-31 | 2024-05-09 | 10-Q |
| 8-K | 2024-05-05 | 2024-05-06 | 8-K |
| 8-K | 2024-03-19 | 2024-03-20 | 8-K |
| 8-K | 2024-02-20 | 2024-02-20 | 8-K |
| 10-K | 2023-12-31 | 2024-02-20 | 10-K |
| 10-Q | 2023-09-30 | 2023-11-02 | 10-Q |
| 10-Q | 2023-06-30 | 2023-08-08 | 10-Q |
| 8-K | 2023-05-09 | 2023-05-12 | 8-K |
| 10-Q | 2023-03-31 | 2023-05-03 | 10-Q |
| 8-K | 2023-02-16 | 2023-02-16 | 8-K |
| 10-K | 2022-12-31 | 2023-02-16 | 10-K |
| 10-Q | 2022-09-30 | 2022-11-09 | 10-Q |
| 8-K | 2022-08-22 | 2022-08-22 | 8-K |
| 10-Q | 2022-06-30 | 2022-08-03 | 10-Q |
| 8-K | 2022-07-06 | 2022-07-06 | 8-K |
| 8-K | 2022-05-10 | 2022-05-13 | 8-K |
| 10-Q | 2022-03-31 | 2022-05-05 | 10-Q |
| 8-K | 2022-04-05 | 2022-04-05 | 8-K |
| 8-K | 2022-02-28 | 2022-03-02 | 8-K |
| 8-K | 2022-02-16 | 2022-02-16 | 8-K |
| 10-K | 2021-12-31 | 2022-02-16 | 10-K |
| 8-K | 2022-02-09 | 2022-02-09 | 8-K |
| 8-K | 2022-02-01 | 2022-02-02 | 8-K |
| 8-K | 2022-01-11 | 2022-01-11 | 8-K |
| 10-Q | 2021-09-30 | 2021-11-04 | 10-Q |
| 8-K | 2021-10-01 | 2021-10-05 | 8-K |
| 8-K | 2021-09-22 | 2021-09-28 | 8-K |
| 10-Q | 2021-06-30 | 2021-08-04 | 10-Q |
| 8-K | 2021-05-11 | 2021-05-12 | 8-K ANNUAL MEETING RESULTS 2021 |
| 10-Q | 2021-03-31 | 2021-05-06 | 10-Q |
| 8-K | 2021-02-17 | 2021-02-17 | 8-K |
| 10-K | 2020-12-31 | 2021-02-17 | 10-K |
| 8-K | 2020-11-30 | 2020-12-01 | 8-K |
| 10-Q | 2020-09-30 | 2020-11-09 | 10-Q |
| 8-K | 2020-09-10 | 2020-09-14 | 8-K |
| 10-Q | 2020-06-30 | 2020-08-05 | 10-Q |
| 8-K | 2020-07-28 | 2020-07-31 | 8-K |
| 8-K | 2020-05-12 | 2020-05-15 | 8-K |
| 10-Q | 2020-03-31 | 2020-05-06 | 10-Q |
| 8-K | 2020-04-13 | 2020-04-14 | 8-K |
| 8-K | 2020-04-08 | 2020-04-13 | 8-K |
| 8-K | 2020-03-26 | 2020-03-31 | 8-K |
| 8-K | 2020-02-13 | 2020-02-13 | 8-K |
| 10-K | 2019-12-31 | 2020-02-13 | 10-K |
| 8-K | 2020-01-30 | 2020-02-03 | 8-K |
| 8-K | 2019-12-05 | 2019-12-06 | 8-K |
| 10-Q | 2019-09-30 | 2019-11-06 | 10-Q |
| 10-Q | 2019-06-30 | 2019-08-01 | 10-Q |
| 8-K | 2019-05-16 | 2019-05-16 | 8-K 2019 ANNUAL MEETING RESULTS |
| 8-K | 2019-05-03 | 2019-05-03 | 8-K |
| 10-Q | 2019-03-31 | 2019-05-02 | 10-Q |
| 8-K | 2019-04-05 | 2019-04-05 | 8-K |
| 8-K | 2019-03-27 | 2019-03-27 | 8-K |
| 8-K | 2019-03-06 | 2019-03-06 | 8-K |
| 8-K | 2019-02-14 | 2019-02-14 | 8-K |
| 8-K | 2019-02-14 | 2019-02-14 | 8-K |
| 10-K | 2018-12-31 | 2019-02-14 | 10-K |
| 8-K | 2019-02-08 | 2019-02-08 | 8-K SALE OF U.S. WATER SERVICES |
| 8-K | 2019-02-04 | 2019-02-04 | 8-K |
| 8-K | 2019-01-16 | 2019-01-16 | 8-K |
| 8-K | 2018-12-27 | 2018-12-27 | 8-K |
| 8-K | 2018-11-30 | 2018-11-30 | 8-K |
| 10-Q | 2018-09-30 | 2018-11-01 | 10-Q |
| 8-K | 2018-10-03 | 2018-10-03 | 8-K |
| 10-Q | 2018-06-30 | 2018-08-02 | 10-Q |
| 8-K | 2018-05-08 | 2018-05-10 | 8-K 2018 ANNUAL MEETING RESULTS |
| 10-Q | 2018-03-31 | 2018-05-02 | 10-Q |
| 8-K | 2018-02-15 | 2018-02-15 | 2018 EARNINGS GUIDANCE |
| 10-K | 2017-12-31 | 2018-02-15 | 10-K |
| 8-K | 2018-01-16 | 2018-01-16 | 8-K |
| 8-K | 2017-12-05 | 2017-12-06 | 8-K |
| 10-Q | 2017-09-30 | 2017-11-01 | 10-Q |
| 8-K | 2017-08-23 | 2017-08-24 | 8-K |
| 10-Q | 2017-06-30 | 2017-08-02 | 10-Q |
| 8-K | 2017-05-09 | 2017-05-11 | 8-K 2017 ANNUAL MEETING RESULTS |
| 10-Q | 2017-03-31 | 2017-05-04 | 10-Q |
| 8-K | 2017-02-16 | 2017-02-16 | 8-K OWEN LEGAL OPINION PENSION PROSPECTUS SUPPLEMENT |
| 10-K | 2016-12-31 | 2017-02-15 | 10-K |
| 8-K | 2017-01-17 | 2017-01-18 | 8-K PENSION CONTRIBUTION |
| 8-K | 2016-12-19 | 2016-12-19 | 8-K 2017 EARNINGS GUIDANCE |
| 8-K | 2016-12-12 | 2016-12-13 | 8-K $80M SENIOR UNSECURED NOTES |
| 8-K | 2016-12-07 | 2016-12-08 | 8-K DECEMBER 2016 DEMAND NOMINATIONS |
| 10-Q | 2016-09-30 | 2016-11-04 | 10-Q |
| 8-K | 2016-10-25 | 2016-10-26 | ADAMS CFO APPOINTMENT |
| 8-K | 2016-09-26 | 2016-09-27 | 8-K DEVINCK RETIREMENT |
| 10-Q | 2016-06-30 | 2016-08-03 | 10-Q |
| 8-K | 2016-08-01 | 2016-08-02 | 8-K AUGUST 2016 DEMAND NOMINATIONS |
| 8-K | 2016-05-24 | 2016-05-26 | 8-K CLIFFS AGREEMENTS |
| 8-K | 2016-05-10 | 2016-05-12 | 8-K ANNUAL MEETING RESULTS 2016 |
| 10-Q | 2016-03-31 | 2016-05-03 | 10-Q |
| 8-K | 2016-02-29 | 2016-03-01 | MARCH 2016 DEMAND NOMINATIONS |
| 10-K | 2015-12-31 | 2016-02-22 | 10-K |
| 8-K | 2016-02-18 | 2016-02-18 | 2016 EARNINGS RELEASE |
| 8-K | 2016-02-12 | 2016-02-12 | ALLETE PROPERTIES REAL ESTATE IMPAIRMENT |
| 8-K | 2015-12-09 | 2015-12-09 | 8-K 2016 EARNINGS GUIDANCE |
| 8-K | 2015-12-01 | 2015-12-02 | 8-K DECEMBER 2015 DEMAND NOMINATIONS |
| 8-K | 2015-11-05 | 2015-11-12 | 8-K |
| 8-K | 2015-11-05 | 2015-11-10 | 8-K CUTSHALL APPOINTMENT |
| 10-Q | 2015-09-30 | 2015-11-03 | 10-Q |
| 8-K | 2015-09-25 | 2015-09-30 | 8-K STELLMAKER RETIREMENT |
| 8-K | 2015-08-25 | 2015-08-28 | 8-K $125 TERM LOAN |
| 10-Q | 2015-06-30 | 2015-08-04 | 10-Q |
| 8-K | 2015-08-03 | 2015-08-03 | 8-K AUGUST 2015 DEMAND NOMINATIONS |
| 8-K | 2015-07-14 | 2015-07-15 | 8-K |
| 8-K | 2015-07-02 | 2015-07-02 | 8-K |
| 8-K | 2015-05-12 | 2015-05-14 | 8-K |
| 10-Q | 2015-03-31 | 2015-05-07 | 10-Q |
| 8-K | 2015-05-06 | 2015-05-06 | 8-K |
| 8-K | 2015-03-02 | 2015-03-02 | 8-K MARCH DEMAND NOMINATIONS |
| 8-K | 2015-02-25 | 2015-02-25 | 8-K |
| 10-K | 2014-12-31 | 2015-02-17 | 10-K |
| 8-K | 2015-01-27 | 2015-01-28 | 8-K |
| 8-K | 2014-12-10 | 2014-12-10 | 8-K |
| 8-K | 2014-12-01 | 2014-12-01 | 8-K |
| 8-K | 2014-11-24 | 2014-11-25 | 8-K |
| 10-Q | 2014-09-30 | 2014-11-03 | 10-Q |
| 8-K | 2014-09-08 | 2014-09-08 | 8-K |
| 10-Q | 2014-06-30 | 2014-08-01 | 10-Q |
| 8-K | 2014-07-30 | 2014-07-31 | 8-K |
| 8-K | 2014-06-27 | 2014-06-30 | 8-K |
| 8-K | 2014-05-13 | 2014-05-15 | 8-K |
| 10-Q | 2014-03-31 | 2014-05-07 | 10-Q |
| 8-K | 2014-02-28 | 2014-03-04 | 8-K |
| 8-K | 2014-02-26 | 2014-03-04 | 8-K |
| 8-K | 2014-02-18 | 2014-02-18 | 8-K |
| 10-K | 2013-12-31 | 2014-02-14 | 10-K |
| 8-K | 2014-01-10 | 2014-01-10 | 8-K PENSION STOCK CONTRIBUTION & CONTROLLER |
| 8-K | 2013-12-10 | 2013-12-10 | 8-K |
| 8-K | 2013-12-02 | 2013-12-02 | 8-K |
| 8-K | 2013-12-02 | 2013-12-02 | 8-K |
| 8-K | 2013-11-12 | 2013-11-12 | 8-K |
| 8-K | 2013-11-04 | 2013-11-04 | 8-K |
| 10-Q | 2013-09-30 | 2013-11-01 | 10-Q |
| 8-K | 2013-08-26 | 2013-08-27 | 8-K |
| 8-K | 2013-08-01 | 2013-08-01 | 8-K |
| 10-Q | 2013-06-30 | 2013-08-01 | FORM 10-Q |
| 8-K | 2013-05-14 | 2013-05-16 | 2013 ANNUAL MEETING RESULTS |
| 10-Q | 2013-03-31 | 2013-05-08 | ALLETE, INC. FIRST QUARTER 2013 10-Q |
| 8-K | 2013-04-02 | 2013-04-02 | FIRST MORTGAGE BOND ISSUANCE |
| 8-K | 2013-03-01 | 2013-03-01 | 8-K |
| 10-K | 2012-12-31 | 2013-02-15 | 10-K |
| 8-K | 2013-01-25 | 2013-01-25 | 8-K |
| 8-K | 2012-12-11 | 2012-12-11 | 8-K |
| 8-K | 2012-12-03 | 2012-12-03 | 8-K |
| 10-Q | 2012-09-30 | 2012-10-31 | ALLETE, INC. THIRD QUARTER 2012 10-Q |
| 8-K | 2012-08-03 | 2012-08-03 | KCCI AMENDMENT |
| 10-Q | 2012-06-30 | 2012-08-02 | ALLETE, INC. SECOND QUARTER 2012 10-Q |
| 8-K | 2012-08-01 | 2012-08-01 | AUGUST 2012 DEMAND NOMINATIONS |
| 8-K | 2012-07-02 | 2012-07-02 | FIRST MORTGAGE BONDS ISSUANCE |
| 8-K | 2012-05-08 | 2012-05-11 | ANNUAL MEETING |
| 10-Q | 2012-03-31 | 2012-05-02 | ALLETE, INC. FIRST QUARTER 2012 10-Q |
| 8-K | 2012-03-01 | 2012-03-01 | MARCH 2012 DEMAND NOMINATIONS |
| 8-K | 2012-02-17 | 2012-02-17 | 8.01 OTHER EVENTS |
| 10-K | 2011-12-31 | 2012-02-15 | ALLETE, INC. 2011 FORM 10-K |
| 8-K | 2012-02-06 | 2012-02-06 | - |
| 8-K | 2011-12-15 | 2011-12-15 | PENSION CONTRIBUTION |
| 8-K | 2011-12-13 | 2011-12-13 | 2012 EARNINGS GUIDANCE |
| 8-K | 2011-12-01 | 2011-12-01 | DEMAND NOMINATIONS |
| 10-Q | 2011-09-30 | 2011-11-02 | ALLETE 10-Q FOR THE QUARTER ENDED SEPTEMBER 30 2011 |
| 8-K | 2011-08-25 | 2011-08-31 | TERM LOAN 8-K |
| 10-Q | 2011-06-30 | 2011-08-05 | ALLETE 10-Q FOR THE QUARTER ENDED JUNE 30, 2011 |
| 8-K | 2011-07-29 | 2011-07-29 | 2ND QUARTER 2011 EARNINGS RELEASE |
| 8-K | 2011-06-29 | 2011-07-01 | 8-K FOR MUNICIPAL CUSTOMER CONTRACT EXTENSIONS |
| 8-K | 2011-06-20 | 2011-06-24 | BISON 3 8-K |
| 8-K | 2011-05-27 | 2011-05-27 | CREDIT FACILITY |
| 8-K | 2011-05-25 | 2011-05-25 | PPA AND FINAL RATES |
| 8-K | 2011-05-10 | 2011-05-12 | ANNUAL MEETING RESULTS & BOARD CHAIR |
| 10-Q | 2011-03-31 | 2011-04-29 | ALLETE 10-Q FOR THE QUARTER ENDED MARCH 31, 2011 |
| 10-K | 2010-12-31 | 2011-02-16 | ALLETE, INC. 2010 10-K |
| 8-K | 2011-01-24 | 2011-01-24 | EXECUTIVE COMPENSATION PLANS UPDATE |
| 8-K | 2010-12-09 | 2010-12-09 | 2011 EARNINGS GUIDANCE |
| 8-K | 2010-11-03 | 2010-11-03 | ALLETE 8-K RATE CASE ORDER |
| 10-Q | 2010-09-30 | 2010-10-29 | ALLETE 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2010 |
| 8-K | 2010-10-01 | 2010-10-01 | ALLETE 8-K RETAIL RATE CASE ESTIMATE |
| 10-Q | 2010-06-30 | 2010-08-04 | ALLETE 10-Q FOR THE QUARTER ENDED JUNE 30, 2010 |
| 8-K | 2010-06-21 | 2010-06-21 | FMB PRICING |
| 8-K | 2010-05-14 | 2010-05-14 | ANNUAL MEETING RESULTS |
| 10-Q | 2010-03-31 | 2010-04-30 | ALLETE 10-Q FOR THE QUARTER ENDED MARCH 31, 2010 |
| 8-K | 2010-04-26 | 2010-04-26 | HODNIK AND DIRECTOR PLAN CHANGES |
| 8-K | 2010-04-06 | 2010-04-06 | HEALTH CARE REFORM |
| 8-K | 2010-03-02 | 2010-03-02 | DEMAND NOMINATIONS |
| 10-K | 2009-12-31 | 2010-02-12 | ALLETE, INC. 2009 10-K |
| 8-K | 2010-02-11 | 2010-02-11 | CEO RETIREMENT ANNOUNCEMENT - BOARD NAMES REPLACEMENT |
| 8-K | 2010-01-25 | 2010-01-25 | RE-ELECTION ANNOUNCEMENT OF GEORGE MAYER |
| 8-K | 2010-01-07 | 2010-01-07 | MP RATE CASE RESPONSE |
| 8-K | 2010-01-04 | 2010-01-04 | PURCHASE OF THE 250 KV DC TRANSMISSION LINE AND RELATED FACILITIES COMPLETED |
| 8-K | 2009-12-16 | 2009-12-16 | MPUC 2010 INTERIM RATE INCREASE |
| 8-K | 2009-12-09 | 2009-12-09 | $80 MILLION FIRST MORTGAGE BONDS |
| 8-K | 2009-12-03 | 2009-12-03 | TACONITE DEMAND NOMINATIONS AND DC LINE APPROVAL |
| 10-Q | 2009-09-30 | 2009-11-03 | ALLETE 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2009 |
| 8-K | 2009-11-02 | 2009-11-02 | ALLETE, INC. 2010 EARNINGS GUIDANCE |
| 8-K | 2009-11-02 | 2009-11-02 | ALLETE 8-K 2010 RATE CASE ANNOUNCEMENT |
| 8-K | 2009-10-30 | 2009-10-30 | ALLETE, INC. THIRD QUARTER 2009 EARNINGS ANNOUNCEMENT |
| 8-K | 2009-10-23 | 2009-10-23 | JAMES HAINES, JR NAMED TO ALLETE BOARD OF DIRECTORS AND DEPARTURE OF CLAUDIA WEL |
| 10-Q | 2009-06-30 | 2009-08-05 | ALLETE 10-Q FOR THE QUARTER ENDED JUNE 30, 2009 |
| 8-K | 2009-07-22 | 2009-07-27 | KATHRYN DINDO NAMED TO ALLETE BOARD OF DIRECTORS |
| 8-K | 2009-07-15 | 2009-07-15 | EXPIRATION OF SHAREHOLDER RIGHTS PLAN |
| 8-K | 2009-05-13 | 2009-05-13 | ALAN HODNIK NAMED PRESIDENT OF ALLETE |
| 10-Q | 2009-03-31 | 2009-05-01 | ALLETE 10-Q FOR THE QUARTER ENDED MARCH 31, 2009 |
| 8-K | 2009-04-07 | 2009-04-07 | ALLETE 8-K RATE CASE ESTIMATE |
| 8-K | 2009-03-05 | 2009-03-05 | 2009 TACONITE DEMAND NOMINATIONS |
| 8-K | 2009-02-17 | 2009-02-17 | KCCI DISTRIBUTION AGREEMENT AMENDMENT |
| 10-K | 2008-12-31 | 2009-02-13 | ALLETE, INC. 2008 10-K |
| 8-K | 2008-12-05 | 2008-12-05 | ALLETE 8-K 2009 EARNINGS GUIDANCE |
| 8-K | 2008-11-12 | 2008-11-12 | $80 MILLION FIRST MORTGAGE BONDS 11-12-08 |
| 10-Q | 2008-09-30 | 2008-10-31 | ALLETE 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2008 |
| 8-K | 2008-08-29 | 2008-08-29 | MINNESOTA POWER NOV |
| 10-Q | 2008-06-30 | 2008-08-01 | ALLETE 10-Q FOR THE QUARTER ENDED JUNE 30, 2008 |
| 8-K | 2008-05-16 | 2008-05-16 | APPOINTMENT OF VICE PRESIDENT |
| 8-K | 2008-05-13 | 2008-05-13 | MINNESOTA POWER LONG TERM PROJECT |
| 10-Q | 2008-03-31 | 2008-05-02 | ALLETE 10-Q FOR THE QUARTER ENDED MARCH 31, 2008 |
| 8-K | 2008-03-24 | 2008-03-24 | $75 MILLION FIRST MORTGAGE BONDS |
| 8-K | 2008-02-19 | 2008-02-19 | DISTRIBUTION AGREEMENT |
| 10-K | 2007-12-31 | 2008-02-15 | ALLETE, INC. 2007 10-K |
| 8-K | 2008-02-12 | 2008-02-12 | FERC RATE CASE APPROVAL |