| --- | --- | --- | |------------------------------------------|----------------------|------------------------| | NorthWestern Energy | | 8-K'ed on Dec. 7, 2020 | | | | | | | | | | Capital One Securities Energy Conference | \| December 7, 2020 | | NorthWestern Delivering a Bright Futur 2 Forward Looking Statements Forward Looking Statements During the course of this presentation, there will be forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation ...

8-K'ed on Nov. 9, 2020 NorthWestern Energy EEI (virtual) Financial Conference | November 9-10, 2020 NorthWeste 2 Forward Looking Statements Madison River Valley - Montana Boulder River in Montana Securities Litigation Reform Act of 1995. Forward-looking statements often | --- | --- | |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (mark one) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-10499 NORTHWESTERN CORP (Exact name of registrant as specified in its charter) Delaware 46-0172280 Indicate by check mark whether ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (mark one) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-10499 NORTHWESTERN CORP (Exact name of registrant as specified in its charter) | | | (State or other jurisdiction of incorporation or ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (mark one) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-10499 NORTHWESTERN CORP (Exact name of registrant as specified in its charter) | | Delaware | | 46-0172280 | | --- | --- | --- | --- | | | (State or other jurisdiction of | | (I.R.S. Employer | | | incorporation or organization) | | Identification No.) | | 3010 W. 69th S ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-10499 NORTHWESTERN CORP (Exact name of registrant as specified in its charter) | | Delaware | | 46-0172280 | | --- | --- | --- | --- | ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (mark one) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-10499 NORTHWESTERN CORP (Exact name of registrant as specified in its charter) | | Delaware | | 46-0172280 | | --- | --- | --- ...

For the quarterly period ended June 30, 2019 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (mark OR one) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 NORTHWESTERN CORP (Exact name of registrant as specified in its charter) Delaware 46-0172280 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 3010 W. 69th Street Sioux Falls South Dakota 57108 (Address of principal executive offices ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (mark one) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-10499 NORTHWESTERN CORPORATION (Exact name of registrant as specified in its charter) | Delaware | 46-0172280 | | --- | --- | | ( ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-10499 NORTHWESTERN CORPORATION (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or ...