Attached files
file | filename |
---|---|
EX-32.2 - EX-32.2 CERTIFICATION OF CRYSTAL D. LAIL PURSUANT TO SECTION 906 - NORTHWESTERN CORP | ex322certificationq12021.htm |
EX-32.1 - EX-32.1 CERTIFICATION OF ROBERT C. ROWE PURSUANT TO SECTION 906 - NORTHWESTERN CORP | ex321certificationq12021.htm |
EX-31.2 - EX-31.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER - NORTHWESTERN CORP | ex312certificationq12021.htm |
EX-31.1 - EX-31.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER - NORTHWESTERN CORP | ex311certificationq12021.htm |
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