NI · CIK 0001111711
NISOURCE INC. (NI) SEC Filings
Browse 2536 SEC filings for NISOURCE INC., covering Apr 24, 2000 through Jun 18, 2026, organized by filing purpose with direct links to the original EDGAR documents.
Indexed filings
2,536
Filed in the last 12 months
76
History covered
2000–2026
Latest filing
11-K
Latest important filings
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Latest annual report
10-K
Annual report · Feb 11, 2026
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10-Q
Quarterly report · May 6, 2026
Open original filingLatest company update
8-K
Other material event · May 18, 2026
Open original filingComplete filing history
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50 filings
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| Form | Description | Period ended | Filed |
|---|---|---|---|
| 11-K | Employee benefit plan annual report | Dec 31, 2025 | Jun 18, 2026 |
| 4 | PRIMARY DOCUMENT | May 22, 2026 | May 27, 2026 |
| 4 | PRIMARY DOCUMENT | May 21, 2026 | May 26, 2026 |
| 144 | Notice of proposed securities sale | — | May 22, 2026 |
| 4 | PRIMARY DOCUMENT | May 14, 2026 | May 21, 2026 |
| 144 | Notice of proposed securities sale | — | May 21, 2026 |
| 144 | Notice of proposed securities sale | — | May 20, 2026 |
| 8-K | Other material event | May 18, 2026 | May 18, 2026 |
| 144 | Notice of proposed securities sale | — | May 14, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 4 | PRIMARY DOCUMENT | May 11, 2026 | May 13, 2026 |
| 8-K | Shareholder vote | May 11, 2026 | May 12, 2026 |
| 424B2 | 424B2 filing | — | May 12, 2026 |
| FWP | FWP filing | — | May 11, 2026 |
| 424B5 | 424B5 filing | — | May 11, 2026 |
| 10-Q | Quarterly report | Mar 31, 2026 | May 6, 2026 |
Page 1 of 2
Recent filing activity
Annual filing counts derived from this company's SEC history.
2026
55 filings
2025
81 filings
2024
96 filings
2023
99 filings
2022
77 filings
2021
72 filings
2020
97 filings
2019
74 filings
Sources and methodology
How this filing index is assembled and checked.
Filing metadata comes from SEC EDGAR submissions. Categories and plain-language labels are generated deterministically from SEC form and item codes; filing content is not summarized on this page.
Index updated: 7/15/2026
For research and education only. Always review the original SEC filing before making a decision.