Company · CIK 73088 # NORTHWESTERN CORP | CIK | [73088](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000073088) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 4931 — Electric & Other Services Combined | | Incorporated in | DE | | Business address | SD | | Listed | no ticker on SEC record today | | First annual or quarterly report | 1994-03-28 | ## Offerings 11 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-253047 | Shelf Effective | 2021-02-12 | 2021-11-15 | 5 | | 333-257950 | Shelf Effective | 2021-07-16 | 2021-07-16 | 1 | | 333-226253 | Shelf Effective | 2018-07-20 | 2018-07-20 | 1 | | 333-223019 | Shelf Effective | 2018-02-13 | 2018-02-15 | 2 | | 333-202126 | Shelf Effective | 2015-02-17 | 2017-09-06 | 2 | | 333-205834 | Shelf Effective | 2015-07-24 | 2015-07-24 | 1 | | 333-179568 | Shelf Effective | 2012-02-17 | 2014-11-05 | 4 | | 333-182837 | Shelf Withdrawn | 2012-07-25 | 2012-07-27 | 2 | | 333-182895 | Shelf Effective | 2012-07-27 | 2012-07-27 | 1 | | 333-160861 | Shelf Dormant | 2009-07-29 | 2009-07-29 | 1 | | 333-123450 | Shelf Dormant | 2005-03-18 | 2005-03-18 | 1 | ## Filings 24 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2021-11-15 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000110465921139185/0001104659-21-139185-index.htm) Shelf takedown | 333-253047 | 0001104659-21-139185 | | 2021-07-16 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/73088/000007308821000105/0000073088-21-000105-index.htm) Shelf registered | 333-257950 | 0000073088-21-000105 | | 2021-04-23 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000110465921054504/0001104659-21-054504-index.htm) Shelf takedown | 333-253047 | 0001104659-21-054504 | | 2021-03-22 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000110465921039588/0001104659-21-039588-index.htm) Shelf takedown | 333-253047 | 0001104659-21-039588 | | 2021-03-19 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000110465921038924/0001104659-21-038924-index.htm) Shelf takedown | 333-253047 | 0001104659-21-038924 | | 2021-02-12 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/73088/000007308821000032/0000073088-21-000032-index.htm) Shelf registered | 333-253047 | 0000073088-21-000032 | | 2018-07-20 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/73088/000007308818000130/0000073088-18-000130-index.htm) Shelf registered | 333-226253 | 0000073088-18-000130 | | 2018-02-15 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000119312518047399/0001193125-18-047399-index.htm) Shelf takedown | 333-223019 | 0001193125-18-047399 | | 2018-02-13 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/73088/000007308818000026/0000073088-18-000026-index.htm) Shelf registered | 333-223019 | 0000073088-18-000026 | | 2017-09-06 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000119312517277958/0001193125-17-277958-index.htm) Shelf takedown | 333-202126 | 0001193125-17-277958 | | 2015-07-24 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/73088/000007308815000133/0000073088-15-000133-index.htm) Shelf registered | 333-205834 | 0000073088-15-000133 | | 2015-02-17 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/73088/000007308815000032/0000073088-15-000032-index.htm) Shelf registered | 333-202126 | 0000073088-15-000032 | | 2014-11-05 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000156761914000541/0001567619-14-000541-index.htm) Shelf takedown | 333-179568 | 0001567619-14-000541 | | 2014-11-03 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000156761914000537/0001567619-14-000537-index.htm) Shelf takedown | 333-179568 | 0001567619-14-000537 | | 2012-07-27 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/73088/000007308812000135/0000073088-12-000135-index.htm) Shelf registered | 333-182895 | 0000073088-12-000135 | | 2012-07-27 | [RW](https://www.sec.gov/Archives/edgar/data/73088/000007308812000129/0000073088-12-000129-index.htm) Withdrawn | 333-182837 | 0000073088-12-000129 | | 2012-07-25 | [S-3](https://www.sec.gov/Archives/edgar/data/73088/000007308812000125/0000073088-12-000125-index.htm) Shelf registered | 333-182837 | 0000073088-12-000125 | | 2012-04-25 | [424B5](https://www.sec.gov/Archives/edgar/data/73088/000007308812000074/0000073088-12-000074-index.htm) Shelf takedown | 333-179568 | 0000073088-12-000074 | | 2012-02-17 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/73088/000007308812000016/0000073088-12-000016-index.htm) Shelf registered | 333-179568 | 0000073088-12-000016 | | 2009-08-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/73088/999999999509002353/9999999995-09-002353-index.htm) Declared effective | 333-160860 | 9999999995-09-002353 | | 2009-07-29 | [S-3](https://www.sec.gov/Archives/edgar/data/73088/000007308809000095/0000073088-09-000095-index.htm) Shelf registered | 333-160861 | 0000073088-09-000095 | | 2007-04-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/73088/999999999507001369/9999999995-07-001369-index.htm) Declared effective | 333-140959 | 9999999995-07-001369 | | 2005-03-18 | [S-3](https://www.sec.gov/Archives/edgar/data/73088/000104746905007069/0001047469-05-007069-index.htm) Shelf registered | 333-123450 | 0001047469-05-007069 | | 2004-03-01 | [RW](https://www.sec.gov/Archives/edgar/data/73088/000111667904000373/0001116679-04-000373-index.htm) Withdrawn | 070-10053 | 0001116679-04-000373 | [All filings of this company](https://equitycapital.markets/filings?cik=73088) · [CSV](https://equitycapital.markets/filings.csv?cik=73088) --- Source page: https://equitycapital.markets/company/73088 · Data: U.S. SEC EDGAR · CC BY 4.0