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NorthWestern Energy Group, Inc. SEC filings

In the twelve months since 9 October 2025 NorthWestern Energy Group, Inc. filed 23 documents with the SEC of the kinds listed here: 17 current reports (8-K), about 10 regulation fd disclosure; 4 results of operations; 3 material agreement; 3 new financial obligation; 2 shareholder vote; 3 quarterly reports (10-Q), 1 additional proxy material (DEFA14A), 1 proxy statement (DEF 14A), 1 annual report (10-K). The latest, filed 9 September 2026: 8-K, regulation fd disclosure.

FiledFormWhat it was aboutPeriod or event dateFiling
9 September 20268-KRegulation FD disclosure9 September 2026EDGAR
30 July 20268-KResults of operations, Regulation FD disclosure29 July 2026EDGAR
30 July 202610-Qquarterly report30 June 2026EDGAR
22 June 20268-KMaterial agreement, New financial obligation15 June 2026EDGAR
2 June 20268-KMaterial agreement, New financial obligation27 May 2026EDGAR
2 June 20268-KRegulation FD disclosure2 June 2026EDGAR
27 May 20268-KRegulation FD disclosure27 May 2026EDGAR
18 May 20268-KRegulation FD disclosure18 May 2026EDGAR
5 May 20268-KShareholder vote30 April 2026EDGAR
30 April 20268-KResults of operations, Regulation FD disclosure29 April 2026EDGAR
30 April 202610-Qquarterly report31 March 2026EDGAR
3 April 20268-KShareholder vote, Other events2 April 2026EDGAR
12 March 2026DEFA14Aadditional proxy materialEDGAR
12 March 2026DEF 14Aproxy statement30 April 2026EDGAR
17 February 20268-KOfficer or director change11 February 2026EDGAR
12 February 20268-KResults of operations, Regulation FD disclosure11 February 2026EDGAR
12 February 202610-Kannual report31 December 2025EDGAR
9 December 20258-KRegulation FD disclosure, Other events9 December 2025EDGAR
13 November 20258-KMaterial agreement, New financial obligation7 November 2025EDGAR
10 November 20258-KRegulation FD disclosure10 November 2025EDGAR
31 October 20258-KOfficer or director change27 October 2025EDGAR
30 October 20258-KResults of operations, Regulation FD disclosure29 October 2025EDGAR
30 October 202510-Qquarterly report30 September 2025EDGAR
An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened.
Read moreForm 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.

Source

The company's filing index on EDGAR, read from the SEC's submissions feed.

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