NISOURCE INC. — All Filings
1,003 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
All
10-K
10-K/A
10-K405
10-Q
11-K
144
15-12B
15-15D
25
25-NSE
3
3/A
35-CERT
4
4/A
424B2
424B3
424B4
424B5
425
5
8-A12B
8-A12B/A
8-K
8-K/A
ARS
CERT
CORRESP
DEF 14A
DEFA14A
EFFECT
FWP
NO ACT
NT 10-K
NT 11-K
POS AM
POS AMC
POSASR
PRE 14A
PRER14A
PX14A6G
S-1
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
S-8 POS
SC 13G
SC 13G/A
SC TO-C
SC TO-I
SC TO-I/A
SCHEDULE 13G
SCHEDULE 13G/A
SE
U-1
U-1/A
U-12-IA
U-12-IB
U-13-60
U-6B-2
U-9C-3
U5A
U5B
U5B/A
U5S
U5S/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SCHEDULE 13G/A | — | 0000102909-26-001969 | Mar 27, 2026 | — |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000037 | Mar 3, 2026 | Feb 27, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000036 | Mar 3, 2026 | Feb 27, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000035 | Mar 3, 2026 | Feb 27, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000034 | Mar 3, 2026 | Feb 27, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000033 | Mar 3, 2026 | Feb 27, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000032 | Mar 3, 2026 | Feb 27, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000031 | Mar 3, 2026 | Feb 27, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000030 | Mar 3, 2026 | Feb 27, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000029 | Feb 19, 2026 | Feb 18, 2026 |
| 144 | — | 0001959173-26-001104 | Feb 18, 2026 | — |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000028 | Feb 17, 2026 | Feb 13, 2026 |
| 144 | — | 0001959173-26-000943 | Feb 13, 2026 | — |
| 10-K | 10-K | 0001111711-26-000027 | Feb 11, 2026 | Dec 31, 2025 |
| 8-K | 8-K | 0001111711-26-000026 | Feb 11, 2026 | — |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000018 | Jan 27, 2026 | Jan 26, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000017 | Jan 23, 2026 | Jan 22, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000016 | Jan 23, 2026 | Jan 21, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000015 | Jan 23, 2026 | Jan 21, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000014 | Jan 23, 2026 | Jan 21, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000013 | Jan 23, 2026 | Jan 21, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000012 | Jan 23, 2026 | Jan 21, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000011 | Jan 23, 2026 | Jan 21, 2026 |
| 4 | PRIMARY DOCUMENT | 0001111711-26-000010 | Jan 23, 2026 | Jan 21, 2026 |
| 8-K | 8-K | 0001193125-25-316004 | Dec 11, 2025 | — |
| SCHEDULE 13G/A | — | 0001897612-25-000566 | Dec 5, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001111711-25-000059 | Nov 26, 2025 | Nov 25, 2025 |
| 144 | — | 0001959173-25-007294 | Nov 25, 2025 | — |
| 8-K | 8-K | 0001193125-25-272329 | Nov 7, 2025 | — |
| S-8 | S-8 | 0001193125-25-270946 | Nov 7, 2025 | — |
| 424B2 | 424B2 | 0001193125-25-264993 | Nov 4, 2025 | — |
| FWP | FWP | 0001193125-25-263136 | Nov 4, 2025 | — |
| 424B5 | 424B5 | 0001193125-25-261763 | Nov 3, 2025 | — |
| 8-K | 8-K | 0001193125-25-259392 | Oct 31, 2025 | — |
| 424B5 | 424B5 | 0001193125-25-259372 | Oct 31, 2025 | — |
| S-3ASR | S-3ASR | 0001193125-25-258520 | Oct 30, 2025 | — |
| 10-Q | 10-Q | 0001111711-25-000055 | Oct 29, 2025 | Sep 30, 2025 |
| 8-K | 8-K | 0001111711-25-000054 | Oct 29, 2025 | — |
| 8-K | 8-K | 0001193125-25-209933 | Sep 22, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001111711-25-000040 | Sep 2, 2025 | Aug 28, 2025 |
| 144 | — | 0001959173-25-005590 | Aug 28, 2025 | — |
| SCHEDULE 13G/A | — | 0001897612-25-000343 | Aug 14, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001111711-25-000038 | Aug 13, 2025 | Aug 11, 2025 |
| 10-Q | 10-Q | 0001111711-25-000036 | Aug 6, 2025 | Jun 30, 2025 |
| 8-K | 8-K | 0001111711-25-000035 | Aug 6, 2025 | — |
| 8-K | 8-K | 0001193125-25-151249 | Jun 27, 2025 | — |
| 424B2 | 424B2 | 0001193125-25-145822 | Jun 24, 2025 | — |
| FWP | FWP | 0001193125-25-144757 | Jun 23, 2025 | — |
| 424B5 | 424B5 | 0001193125-25-144233 | Jun 23, 2025 | — |
| 11-K | 11-K | 0001111711-25-000028 | Jun 18, 2025 | Dec 31, 2024 |