Nisource Inc. SEC filings NI
Nisource Inc. has 1,001 filings in SEC EDGAR's recent list, going back to Mar 9, 2015. Its latest annual report, Form ARS, was filed on Mar 30, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 11-K | Employee savings plan report | Jun 18, 2026 | Dec 31, 2025 |
| 11-K | Employee savings plan report | Jun 18, 2025 | Dec 31, 2024 |
| 11-K | Employee savings plan report | Jun 26, 2024 | Dec 31, 2023 |
| PX14A6G | Nisource inc. | Apr 12, 2024 | — |
| 25-NSE | Delisting notice | Mar 15, 2024 | — |
| 25-NSE | Delisting notice | Dec 1, 2023 | — |
| 11-K | Employee savings plan report | Jun 26, 2023 | Dec 31, 2022 |
| PRER14A | Filing | Apr 3, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 29, 2022 | — |
| CORRESP | Letter to the SEC | Sep 20, 2022 | — |
| UPLOAD | Letter from the SEC | Sep 8, 2022 | — |
| CORRESP | Letter to the SEC | Aug 30, 2022 | — |
| CORRESP | Letter to the SEC | Jul 29, 2022 | — |
| UPLOAD | Letter from the SEC | Jul 21, 2022 | — |
| 11-K | Employee savings plan report | Jun 17, 2022 | Dec 31, 2021 |
| 11-K | Employee savings plan report | Jun 25, 2021 | Dec 31, 2020 |
| 8-A12B/A | Filing | Apr 20, 2021 | — |
| CERT | Nyse certification | Apr 19, 2021 | — |
| 8-A12B | Filing | Apr 19, 2021 | — |
| 11-K | Employee savings plan report | Jun 26, 2020 | Dec 31, 2019 |
| UPLOAD | Letter from the SEC | May 5, 2020 | — |
| CORRESP | Letter to the SEC | May 5, 2020 | — |
| UPLOAD | Letter from the SEC | Apr 7, 2020 | — |
| 15-12B | Deregistration | Mar 27, 2020 | — |
| 11-K | Employee savings plan report | Jun 26, 2019 | Dec 31, 2018 |
| 11-K | Employee savings plan report | Mar 27, 2019 | Dec 31, 2018 |
| SC TO-I/A | Filing | Mar 7, 2019 | — |
| SC TO-I/A | Filing | Feb 21, 2019 | — |
| EFFECT | Filing | Feb 1, 2019 | — |
| SC TO-I | Filing | Feb 1, 2019 | — |
| CERT | Nyse certification filing- nisource inc. | Dec 31, 2018 | — |
| 8-A12B | Filing | Dec 28, 2018 | — |
| EFFECT | Filing | Dec 26, 2018 | — |
| CORRESP | Letter to the SEC | Dec 26, 2018 | — |
| UPLOAD | Letter from the SEC | Dec 21, 2018 | — |
| SC TO-C | Filing | Dec 14, 2018 | — |
| POSASR | Filing | Nov 28, 2018 | — |
| EFFECT | Filing | Nov 14, 2018 | — |
| CORRESP | Letter to the SEC | Nov 9, 2018 | — |
| 11-K | Employee savings plan report | Jun 26, 2018 | Dec 31, 2017 |
| EFFECT | Filing | May 21, 2018 | — |
| CORRESP | Letter to the SEC | May 18, 2018 | — |
| UPLOAD | Letter from the SEC | May 17, 2018 | — |
| 11-K | Employee savings plan report | Mar 28, 2018 | Dec 31, 2017 |
| POSASR | Filing | Nov 30, 2017 | — |
| POSASR | Filing | Nov 22, 2017 | — |
| 11-K | Employee savings plan report | Jun 21, 2017 | Dec 31, 2016 |
| 11-K | Employee savings plan report | Mar 23, 2017 | Dec 31, 2016 |
| NO ACT | Auto-generated paper document | Jan 6, 2017 | Dec 21, 2016 |
| 11-K | Employee savings plan report | Jun 22, 2016 | Dec 31, 2015 |
| 11-K | Employee savings plan report | Mar 25, 2016 | Dec 31, 2015 |
| 11-K | Employee savings plan report | Jun 25, 2015 | Dec 31, 2014 |
| UPLOAD | Letter from the SEC | May 11, 2015 | — |
| CORRESP | Letter to the SEC | Apr 30, 2015 | — |
| UPLOAD | Letter from the SEC | Apr 29, 2015 | — |
| CORRESP | Letter to the SEC | Apr 17, 2015 | — |
| UPLOAD | Letter from the SEC | Apr 14, 2015 | — |
| 11-K | Employee savings plan report | Mar 26, 2015 | Dec 31, 2014 |
Showing 58 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Electric & Other Services Combined (SIC 4931)
- Listed as
- NI (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Merrillville, IN
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1111711
- Former names
- NISOURCE INC/DE (until Jun 26, 2019); NEW NISOURCE INC (until Nov 2, 2000)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.