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 March 31, 2021 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 o ...

NorthWestern Energy 8-K'ed on March 1, 2021 Investor Update March 2021 NorthWester] Delivering a Bright Fur 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 Reform Act of 1995. Forward-looking statements often address our expected future business and financial performance, and often contain words such as "expects," "anticipates," "int ...

2020 - Full Year Earnings Webcast February 12, 2021 Presenting Today Brian Bird, Chief Financial Officer The information in this presentation is based upon our current expectations as of the date of this document unless otherwise noted. Our actual future business and financial performance may differ materially and adversely from our expectations expressed in any forward-looking statements. We undertake no obligation to revise or publicly update our forward-looking statements or this presentation for any rea ...

NorthWestern Corp (NASDAQ:NWE) Q4 2020 Earnings Conference Call February 12, 2021 3:30 PM ET Company Participants Robert Rowe - President, CEO & Director Travis Meyer - Director, IR & Corporate Finance Brian Bird - CFO Crystal Lail - VP & CAO Conference Call Participants Andrew Levi - Analyst Michael Weinstein - Crédit Suisse Jonathan Reeder - Wells Fargo Securities Ryan Greenwald - Bank of America Merrill Lynch Travis Meyer Good afternoon, and thank you for joining NorthWestern Corporation's financial resu ...

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, 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 organi ...

| --- | --- | --- | |------------------------------|----------------------|-------------------------| | NorthWestern Energy | | 8 -K'ed on Dec. 7, 2020 | | | | | | Wells Fargo Energy Symposium | \| December 9, 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 Reform Act of 1995. Forward-l ...

| --- | --- | --- | |------------------------------------------|----------------------|------------------------| | 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 ...