Nisource Inc. SEC filings NI
Nisource Inc. has 1,000 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 |
|---|---|---|---|
| 424B2 | Prospectus | Nov 3, 2026 | — |
| FWP | Free writing prospectus | Nov 2, 2026 | — |
| 424B5 | Prospectus supplement | Nov 2, 2026 | — |
| 10-Q | Quarterly report | Oct 28, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Oct 28, 2026 | Oct 28, 2026 |
| 8-K |
Current report
New debt
|
Oct 16, 2026 | Oct 15, 2026 |
| 8-K |
Current report
Other events
|
Aug 18, 2026 | Aug 18, 2026 |
| 424B2 | Prospectus | Aug 14, 2026 | — |
| FWP | Free writing prospectus | Aug 13, 2026 | — |
| 424B5 | Prospectus supplement | Aug 13, 2026 | — |
| 10-Q | Quarterly report | Aug 5, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2026 | Aug 5, 2026 |
| 11-K | Employee savings plan report | Jun 18, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Other events
|
May 18, 2026 | May 18, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 12, 2026 | May 11, 2026 |
| 424B2 | Prospectus | May 12, 2026 | — |
| FWP | Free writing prospectus | May 11, 2026 | — |
| 424B5 | Prospectus supplement | May 11, 2026 | — |
| 10-Q | Quarterly report | May 6, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| ARS | Annual report to shareholders | Mar 30, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Mar 30, 2026 | — |
| DEF 14A | Proxy statement | Mar 30, 2026 | May 11, 2026 |
| 10-K | Annual report | Feb 11, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 11, 2026 | Feb 11, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 11, 2025 | Dec 11, 2025 |
| 8-K |
Current report
Other events
|
Nov 7, 2025 | Nov 7, 2025 |
| S-8 | Employee stock plan registration | Nov 7, 2025 | — |
| 424B2 | Prospectus | Nov 4, 2025 | — |
| FWP | Free writing prospectus | Nov 4, 2025 | — |
| 424B5 | Prospectus supplement | Nov 3, 2025 | — |
| 8-K |
Current report
Material agreement, Other events
|
Oct 31, 2025 | Oct 31, 2025 |
| 424B5 | Prospectus supplement | Oct 31, 2025 | — |
| S-3ASR | Automatic shelf registration | Oct 30, 2025 | — |
| 10-Q | Quarterly report | Oct 29, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Oct 29, 2025 | Oct 29, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 22, 2025 | Sep 22, 2025 |
| 10-Q | Quarterly report | Aug 6, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2025 | Aug 6, 2025 |
| 8-K |
Current report
Other events
|
Jun 27, 2025 | Jun 27, 2025 |
| 424B2 | Prospectus | Jun 24, 2025 | — |
| FWP | Free writing prospectus | Jun 23, 2025 | — |
| 424B5 | Prospectus supplement | Jun 23, 2025 | — |
| 11-K | Employee savings plan report | Jun 18, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Shareholder vote results
|
May 13, 2025 | May 12, 2025 |
| 10-Q | Quarterly report | May 7, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 7, 2025 | May 7, 2025 |
| ARS | Annual report to shareholders | Mar 31, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Mar 31, 2025 | — |
| DEF 14A | Proxy statement | Mar 31, 2025 | May 12, 2025 |
| 8-K |
Current report
Other events
|
Mar 27, 2025 | Mar 27, 2025 |
| 424B2 | Prospectus | Mar 21, 2025 | — |
| FWP | Free writing prospectus | Mar 20, 2025 | — |
| 424B5 | Prospectus supplement | Mar 20, 2025 | — |
| 10-K | Annual report | Feb 12, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 12, 2025 | Feb 12, 2025 |
| 8-K |
Current report
Officer or director change
|
Jan 24, 2025 | Jan 22, 2025 |
| 10-Q | Quarterly report | Oct 30, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Oct 30, 2024 | Oct 30, 2024 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change
|
Oct 22, 2024 | Oct 21, 2024 |
| 8-K |
Current report
Other events
|
Sep 9, 2024 | Sep 9, 2024 |
| 424B2 | Prospectus | Sep 4, 2024 | — |
| FWP | Free writing prospectus | Sep 3, 2024 | — |
| 424B5 | Prospectus supplement | Sep 3, 2024 | — |
| S-8 | Employee stock plan registration | Aug 13, 2024 | — |
| 10-Q | Quarterly report | Aug 7, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2024 | Aug 7, 2024 |
| 11-K | Employee savings plan report | Jun 26, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Other events
|
Jun 24, 2024 | Jun 24, 2024 |
| 424B2 | Prospectus | Jun 18, 2024 | — |
| FWP | Free writing prospectus | Jun 17, 2024 | — |
| 424B5 | Prospectus supplement | Jun 17, 2024 | — |
| 424B5 | Prospectus supplement | Jun 17, 2024 | — |
| 8-K |
Current report
Other events
|
May 16, 2024 | May 16, 2024 |
| 424B2 | Prospectus | May 14, 2024 | — |
| FWP | Free writing prospectus | May 13, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
May 13, 2024 | May 13, 2024 |
| 424B5 | Prospectus supplement | May 13, 2024 | — |
| 10-Q | Quarterly report | May 8, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 8, 2024 | May 8, 2024 |
| PX14A6G | Nisource inc. | Apr 12, 2024 | — |
| ARS | Annual report to shareholders | Apr 1, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 1, 2024 | — |
| DEF 14A | Proxy statement | Apr 1, 2024 | May 13, 2024 |
| 8-K |
Current report
Officer or director change
|
Mar 19, 2024 | Mar 18, 2024 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change
|
Mar 18, 2024 | Mar 18, 2024 |
| 8-K |
Current report
Officer or director change
|
Mar 15, 2024 | Mar 15, 2024 |
| 25-NSE | Delisting notice | Mar 15, 2024 | — |
| 8-K |
Current report
Other events
|
Mar 14, 2024 | Mar 14, 2024 |
| 424B2 | Prospectus | Mar 12, 2024 | — |
| FWP | Free writing prospectus | Mar 11, 2024 | — |
| 424B5 | Prospectus supplement | Mar 11, 2024 | — |
| 8-K |
Current report
Material agreement, Other events
|
Feb 22, 2024 | Feb 22, 2024 |
| 424B5 | Prospectus supplement | Feb 22, 2024 | — |
| 10-K | Annual report | Feb 21, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 21, 2024 | Feb 21, 2024 |
| 8-K |
Current report
Officer or director change
|
Feb 20, 2024 | Feb 19, 2024 |
| 8-K |
Current report
Other events
|
Feb 9, 2024 | Feb 9, 2024 |
| 8-K |
Current report
Officer or director change
|
Jan 26, 2024 | Jan 24, 2024 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Jan 2, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Material agreement, Change to shareholder rights
|
Dec 18, 2023 | Dec 18, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 6, 2023 | Dec 6, 2023 |
| 25-NSE | Delisting notice | Dec 1, 2023 | — |
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Dec 1, 2023 | Dec 1, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 17, 2023 | Nov 17, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 17, 2023 | Nov 17, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 15, 2023 | Nov 15, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 14, 2023 | Nov 14, 2023 |
| 424B5 | Prospectus supplement | Nov 14, 2023 | — |
| 8-K |
Current report
Material agreement, New debt
|
Nov 9, 2023 | Nov 9, 2023 |
| 10-Q | Quarterly report | Nov 1, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 1, 2023 | Nov 1, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 20, 2023 | Oct 20, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 20, 2023 | Oct 19, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Oct 5, 2023 | Oct 5, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 28, 2023 | Sep 28, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 15, 2023 | Sep 15, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Aug 23, 2023 | Aug 23, 2023 |
| 10-Q | Quarterly report | Aug 2, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 2, 2023 | Aug 2, 2023 |
| 11-K | Employee savings plan report | Jun 26, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Jun 20, 2023 | Jun 17, 2023 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change
|
Jun 16, 2023 | Jun 16, 2023 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 9, 2023 | Jun 8, 2023 |
| 424B2 | Prospectus | May 31, 2023 | — |
| FWP | Free writing prospectus | May 30, 2023 | — |
| 424B5 | Prospectus supplement | May 30, 2023 | — |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
May 24, 2023 | May 23, 2023 |
| 8-K |
Current report
Other events
|
May 8, 2023 | May 8, 2023 |
| 10-Q | Quarterly report | May 3, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 3, 2023 | May 3, 2023 |
| ARS | Annual report to shareholders | Apr 12, 2023 | Dec 31, 2022 |
| DEFA14A | Additional proxy material | Apr 12, 2023 | — |
| DEF 14A | Proxy statement | Apr 12, 2023 | — |
| PRER14A | Filing | Apr 3, 2023 | — |
| 8-K |
Current report
Other events
|
Mar 24, 2023 | Mar 24, 2023 |
| 424B2 | Prospectus | Mar 22, 2023 | — |
| FWP | Free writing prospectus | Mar 21, 2023 | — |
| 424B5 | Prospectus supplement | Mar 21, 2023 | — |
| PRE 14A | Preliminary proxy statement | Mar 20, 2023 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 15, 2023 | Mar 14, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 13, 2023 | Mar 10, 2023 |
| 10-K | Annual report | Feb 22, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 22, 2023 | Feb 22, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 20, 2022 | Dec 20, 2022 |
| 8-K |
Current report
Other events
|
Nov 10, 2022 | Nov 10, 2022 |
| 424B5 | Prospectus supplement | Nov 10, 2022 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 7, 2022 | Nov 7, 2022 |
| 10-Q | Quarterly report | Nov 7, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 7, 2022 | Nov 7, 2022 |
| S-3ASR | Automatic shelf registration | Nov 1, 2022 | — |
| 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 | — |
| 8-K |
Current report
Officer or director change
|
Aug 16, 2022 | Aug 15, 2022 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Aug 10, 2022 | Aug 9, 2022 |
| 10-Q | Quarterly report | Aug 3, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2022 | Aug 3, 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 |
| 8-K |
Current report
Other events
|
Jun 10, 2022 | Jun 10, 2022 |
| 424B2 | Prospectus | Jun 8, 2022 | — |
| FWP | Free writing prospectus | Jun 7, 2022 | — |
| 424B5 | Prospectus supplement | Jun 7, 2022 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Regulation FD disclosure
|
May 25, 2022 | May 24, 2022 |
| 10-Q | Quarterly report | May 4, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 4, 2022 | May 4, 2022 |
| 8-K |
Current report
Officer or director change
|
Apr 27, 2022 | Apr 25, 2022 |
| DEF 14A | Proxy statement | Apr 19, 2022 | May 24, 2022 |
| 8-K/A |
Amended current report
Officer or director change
|
Mar 16, 2022 | Mar 15, 2022 |
| 8-K |
Current report
Officer or director change
|
Mar 16, 2022 | Mar 14, 2022 |
| 10-K | Annual report | Feb 23, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 23, 2022 | Feb 23, 2022 |
| 8-K |
Current report
Material agreement, New debt
|
Feb 18, 2022 | Feb 18, 2022 |
| 8-K |
Current report
Officer or director change
|
Jan 27, 2022 | Jan 27, 2022 |
| S-8 | Employee stock plan registration | Nov 9, 2021 | — |
| 10-Q | Quarterly report | Nov 3, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2021 | Nov 3, 2021 |
| 8-K |
Current report
Officer or director change
|
Oct 25, 2021 | Oct 20, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 10, 2021 | Sep 7, 2021 |
| 8-K |
Current report
Other events
|
Aug 6, 2021 | Aug 6, 2021 |
| 424B5 | Prospectus supplement | Aug 6, 2021 | — |
| 10-Q | Quarterly report | Aug 4, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2021 | Aug 4, 2021 |
| 11-K | Employee savings plan report | Jun 25, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Shareholder vote results
|
May 26, 2021 | May 25, 2021 |
| 10-Q | Quarterly report | May 5, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 5, 2021 | May 5, 2021 |
| 8-A12B/A | Filing | Apr 20, 2021 | — |
| 8-K |
Current report
Material agreement, Bylaw or fiscal year change, Other events
|
Apr 19, 2021 | Apr 13, 2021 |
| CERT | Nyse certification | Apr 19, 2021 | — |
| DEF 14A | Proxy statement | Apr 19, 2021 | May 25, 2021 |
| 8-A12B | Filing | Apr 19, 2021 | — |
| 424B5 | Prospectus supplement | Apr 15, 2021 | — |
| FWP | Free writing prospectus | Apr 14, 2021 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 13, 2021 | Apr 12, 2021 |
| FWP | Free writing prospectus | Apr 13, 2021 | — |
| 424B5 | Prospectus supplement | Apr 13, 2021 | — |
Showing 200 filings, the most recent 200. 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.