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 | — |
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| FWP | Free writing prospectus | Nov 2, 2026 | — |
| 424B5 | Prospectus supplement | Nov 2, 2026 | — |
| 144 | Notice of proposed sale | Oct 30, 2026 | — |
| 144 | Notice of proposed sale | Oct 30, 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 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 424B2 | Prospectus | Aug 14, 2026 | — |
| 144 | Notice of proposed sale | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | 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 |
| 4 | Insider transaction | Jul 15, 2026 | Jul 13, 2026 |
| 11-K | Employee savings plan report | Jun 18, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 26, 2026 | May 21, 2026 |
| 144 | Notice of proposed sale | May 22, 2026 | — |
| 4 | Insider transaction | May 21, 2026 | May 14, 2026 |
| 144 | Notice of proposed sale | May 21, 2026 | — |
| 144 | Notice of proposed sale | May 20, 2026 | — |
| 8-K |
Current report
Other events
|
May 18, 2026 | May 18, 2026 |
| 144 | Notice of proposed sale | May 14, 2026 | — |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 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 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 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 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Feb 19, 2026 | Feb 18, 2026 |
| 144 | Notice of proposed sale | Feb 18, 2026 | — |
| 4 | Insider transaction | Feb 17, 2026 | Feb 13, 2026 |
| 144 | Notice of proposed sale | Feb 13, 2026 | — |
| 10-K | Annual report | Feb 11, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 11, 2026 | Feb 11, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 26, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 21, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 21, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 21, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 21, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 21, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 21, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 21, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 11, 2025 | Dec 11, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 5, 2025 | — |
| 4 | Insider transaction | Nov 26, 2025 | Nov 25, 2025 |
| 144 | Notice of proposed sale | Nov 25, 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 |
| 4 | Insider transaction | Sep 2, 2025 | Aug 28, 2025 |
| 144 | Notice of proposed sale | Aug 28, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 4 | Insider transaction | Aug 13, 2025 | Aug 11, 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 |
| 4 | Insider transaction | Jun 2, 2025 | May 30, 2025 |
| 144 | Notice of proposed sale | May 30, 2025 | — |
| 4 | Insider transaction | May 19, 2025 | May 16, 2025 |
| 144 | Notice of proposed sale | May 16, 2025 | — |
| 4 | Insider transaction | May 15, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 14, 2025 | — |
| 144 | Notice of proposed sale | May 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 13, 2025 | — |
| 144 | Notice of proposed sale | May 13, 2025 | — |
| 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 |
| 4 | Insider transaction | Mar 31, 2025 | Mar 27, 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 | — |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 144 | Notice of proposed sale | Mar 3, 2025 | — |
| 4 | Insider transaction | Feb 18, 2025 | Feb 14, 2025 |
| 144 | Notice of proposed sale | Feb 14, 2025 | — |
| 10-K | Annual report | Feb 12, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 12, 2025 | Feb 12, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 4, 2025 | — |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 28, 2025 | Jan 24, 2025 |
| 8-K |
Current report
Officer or director change
|
Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 23, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | 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 |
| SC 13G/A | Amended ownership over 5% (passive) | Sep 10, 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 | — |
| 4 | Insider transaction | Aug 23, 2024 | Aug 21, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 19, 2024 |
| 144 | Notice of proposed sale | Aug 21, 2024 | — |
| 144 | Notice of proposed sale | Aug 19, 2024 | — |
| 4 | Insider transaction | Aug 15, 2024 | Aug 13, 2024 |
| S-8 | Employee stock plan registration | Aug 13, 2024 | — |
| 144 | Notice of proposed sale | 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 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 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 | — |
| 4 | Insider transaction | Jun 3, 2024 | May 30, 2024 |
| 144 | Notice of proposed sale | May 30, 2024 | — |
| 144 | Notice of proposed sale | May 16, 2024 | — |
| 8-K |
Current report
Other events
|
May 16, 2024 | May 16, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 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 | — |
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.