Company · CIK 66904 # MISSISSIPPI POWER CO | CIK | [66904](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000066904) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 4911 — Electric Services | | Incorporated in | MS | | Business address | MS | | Listed | no ticker on SEC record today | | First annual or quarterly report | 1994-03-28 | ## Offerings 8 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-297875 | Shelf Effective | 2026-07-31 | 2026-08-07 | 2 | | 333-273697 | Shelf Effective | 2023-08-04 | 2026-02-25 | 3 | | 333-240328 | Shelf Effective | 2020-08-04 | 2021-06-24 | 4 | | 333-219651 | Shelf Effective | 2017-08-03 | 2018-03-22 | 4 | | 333-183528 | Shelf Effective | 2012-08-24 | 2012-10-23 | 2 | | 333-161168 | Shelf Effective | 2009-08-07 | 2012-08-13 | 9 | | 333-152895 | Shelf Effective | 2008-08-08 | 2009-03-03 | 4 | | 333-108156 | Shelf Effective | 2003-08-22 | 2007-11-08 | 5 | ## Filings 34 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-08-07 | [EFFECT](https://www.sec.gov/Archives/edgar/data/66904/999999999526002590/9999999995-26-002590-index.htm) Declared effective | 333-297875 | 9999999995-26-002590 | | 2026-07-31 | [S-3](https://www.sec.gov/Archives/edgar/data/66904/000006690426000011/0000066904-26-000011-index.htm) Shelf registered | 333-297875 | 0000066904-26-000011 | | 2026-02-25 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690426000002/0000066904-26-000002-index.htm) Shelf takedown | 333-273697 | 0000066904-26-000002 | | 2023-08-17 | [EFFECT](https://www.sec.gov/Archives/edgar/data/66904/999999999523002432/9999999995-23-002432-index.htm) Declared effective | 333-273697 | 9999999995-23-002432 | | 2023-08-04 | [S-3](https://www.sec.gov/Archives/edgar/data/66904/000006690423000003/0000066904-23-000003-index.htm) Shelf registered | 333-273697 | 0000066904-23-000003 | | 2021-06-24 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690421000004/0000066904-21-000004-index.htm) Shelf takedown | 333-240328 | 0000066904-21-000004 | | 2021-06-24 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690421000002/0000066904-21-000002-index.htm) Shelf takedown | 333-240328 | 0000066904-21-000002 | | 2020-08-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/66904/999999999520002139/9999999995-20-002139-index.htm) Declared effective | 333-240328 | 9999999995-20-002139 | | 2020-08-04 | [S-3](https://www.sec.gov/Archives/edgar/data/66904/000006690420000006/0000066904-20-000006-index.htm) Shelf registered | 333-240328 | 0000066904-20-000006 | | 2018-03-22 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690418000004/0000066904-18-000004-index.htm) Shelf takedown | 333-219651 | 0000066904-18-000004 | | 2018-03-22 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690418000002/0000066904-18-000002-index.htm) Shelf takedown | 333-219651 | 0000066904-18-000002 | | 2017-08-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/66904/999999999517002158/9999999995-17-002158-index.htm) Declared effective | 333-219651 | 9999999995-17-002158 | | 2017-08-03 | [S-3](https://www.sec.gov/Archives/edgar/data/66904/000006690417000013/0000066904-17-000013-index.htm) Shelf registered | 333-219651 | 0000066904-17-000013 | | 2012-10-23 | [EFFECT](https://www.sec.gov/Archives/edgar/data/66904/999999999512003054/9999999995-12-003054-index.htm) Declared effective | 333-183528 | 9999999995-12-003054 | | 2012-08-24 | [S-3](https://www.sec.gov/Archives/edgar/data/66904/000009212212000132/0000092122-12-000132-index.htm) Shelf registered | 333-183528 | 0000092122-12-000132 | | 2012-08-13 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212212000124/0000092122-12-000124-index.htm) Shelf takedown | 333-161168 | 0000092122-12-000124 | | 2012-03-05 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212212000033/0000092122-12-000033-index.htm) Shelf takedown | 333-161168 | 0000092122-12-000033 | | 2012-03-05 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212212000031/0000092122-12-000031-index.htm) Shelf takedown | 333-161168 | 0000092122-12-000031 | | 2011-10-12 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212211000129/0000092122-11-000129-index.htm) Shelf takedown | 333-161168 | 0000092122-11-000129 | | 2011-10-12 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212211000128/0000092122-11-000128-index.htm) Shelf takedown | 333-161168 | 0000092122-11-000128 | | 2011-10-11 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212211000122/0000092122-11-000122-index.htm) Shelf takedown | 333-161168 | 0000092122-11-000122 | | 2011-10-11 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212211000121/0000092122-11-000121-index.htm) Shelf takedown | 333-161168 | 0000092122-11-000121 | | 2009-08-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/66904/999999999509002414/9999999995-09-002414-index.htm) Declared effective | 333-161168 | 9999999995-09-002414 | | 2009-08-07 | [S-3](https://www.sec.gov/Archives/edgar/data/66904/000009212209000065/0000092122-09-000065-index.htm) Shelf registered | 333-161168 | 0000092122-09-000065 | | 2009-03-03 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212209000016/0000092122-09-000016-index.htm) Shelf takedown | 333-152895 | 0000092122-09-000016 | | 2008-11-14 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212208000073/0000092122-08-000073-index.htm) Shelf takedown | 333-152895 | 0000092122-08-000073 | | 2008-09-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/66904/999999999508002737/9999999995-08-002737-index.htm) Declared effective | 333-152895 | 9999999995-08-002737 | | 2008-08-08 | [S-3](https://www.sec.gov/Archives/edgar/data/66904/000009212208000049/0000092122-08-000049-index.htm) Shelf registered | 333-152895 | 0000092122-08-000049 | | 2007-11-08 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000009212207000104/0000092122-07-000104-index.htm) Shelf takedown | 333-108156 | 0000092122-07-000104 | | 2005-06-27 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690405000009/0000066904-05-000009-index.htm) Shelf takedown | 333-108156 | 0000066904-05-000009 | | 2004-03-05 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690404000004/0000066904-04-000004-index.htm) Shelf takedown | 333-108156 | 0000066904-04-000004 | | 2004-03-05 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690404000003/0000066904-04-000003-index.htm) Shelf takedown | 333-108156 | 0000066904-04-000003 | | 2003-08-22 | [S-3](https://www.sec.gov/Archives/edgar/data/66904/000006690403000008/0000066904-03-000008-index.htm) Shelf registered | 333-108156 | 0000066904-03-000008 | | 2003-04-25 | [424B5](https://www.sec.gov/Archives/edgar/data/66904/000006690403000004/0000066904-03-000004-index.htm) Shelf takedown | 333-45069 | 0000066904-03-000004 | [All filings of this company](https://equitycapital.markets/filings?cik=66904) · [CSV](https://equitycapital.markets/filings.csv?cik=66904) --- Source page: https://equitycapital.markets/company/66904 · Data: U.S. SEC EDGAR · CC BY 4.0