Nisource Inc.
NI- Exchange
- NYSE
- Industry
- Electric & Other Services Combined
- SEC CIK
- 0001111711
In the last 90 days, Nisource Inc. insiders filed 0 open-market purchases and 1 sale; 916 institutions reported holding it in 13F filings for Q2 2026, worth $22.0B in total; no superinvestor holds it.
Holders of 5% or more of NI
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Nisource Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | 13G/A | 10.50%50.3M shares | +1.80 ppfrom 8.70% | May 14, 20253 filings | Dec 5, 2025 | SEC |
| State Street Corp | 13G | 5.00%23.8M shares | +0.10 ppfrom 4.90% | Feb 4, 20252 filings | May 13, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on Nisource Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 202611:07 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Dec 5, 202512:52 PM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 10.50%50.3M shares | +1.80 ppfrom 8.70% | Nov 30, 2025 | SEC |
| Aug 14, 202512:12 PM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 8.70%40.7M shares | +3.60 ppfrom 5.10% | Jun 30, 2025 | SEC |
| May 14, 202510:47 AM ET | T. Rowe Price Investment Management, Inc. | 13G | 5.10%24.0M shares | New | Mar 31, 2025 | SEC |
| May 13, 202511:46 AM ET | State Street Corp | 13G | 5.00%23.8M shares | +0.10 ppfrom 4.90% | Mar 31, 2025 | SEC |
| Feb 4, 20257:40 AM ET | State Street Corp | 13G | 4.90%22.9M shares | NewBelow 5% | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Nisource Inc. shares.
No Form 144 notices for Nisource Inc. are on file.