NiSource Inc.
US ˙ NYSE ˙ US65473P1057

SecurityNI / NiSource Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership488,939 shares
Latest Disclosed Value $ 20,418,296
Sei Investments Co reports 5.02% decrease in ownership of NI / NiSource Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 488,939 shares of NiSource Inc. (US:NI) valued at $20,418,093 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 514,755 shares of NiSource Inc.. This represents a change in shares of -5.02% during the quarter. The current value of the position is $22,261,393 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F NISOURCE COM 65473P105 488,939 -25,816 -5.02 20,418 -8.40 0.0202
2025-11-13 2025-09-30 13F NISOURCE COM 65473P105 514,755 -163,310 -24.08 22,290 -18.51 0.0240
2025-08-14 2025-06-30 13F NISOURCE COM 65473P105 678,065 -53,835 -7.36 27,353 -6.77 0.0317
2025-05-14 2025-03-31 13F/A-1 NISOURCE COM 65473P105 731,900 -8,778 -1.19 29,339 7.76 0.0378
2025-05-13 2025-03-31 13F NISOURCE COM 65473P105 748,320 7,642 28,029 0.0305
2025-02-11 2024-12-31 13F NISOURCE COM 65473P105 740,678 -111,927 -13.13 27,227 -7.84 0.0350
2024-11-12 2024-09-30 13F NISOURCE COM 65473P105 852,605 4,637 0.55 29,543 20.93 0.0384
2024-08-13 2024-06-30 13F NISOURCE COM 65473P105 847,968 51,275 6.44 24,430 10.86 0.0346
2024-05-07 2024-03-31 13F NISOURCE COM 65473P105 796,693 164,532 26.03 22,036 31.29 0.0323
2024-02-14 2023-12-31 13F NISOURCE COM 65473P105 632,161 59,924 10.47 16,784 18.85 0.0269
2023-11-14 2023-09-30 13F NISOURCE COM 65473P105 572,237 116,884 25.67 14,123 13.39 0.0254
2023-08-11 2023-06-30 13F NISOURCE COM 65473P105 455,353 -142,736 -23.87 12,454 -25.52 0.0217
2023-05-12 2023-03-31 13F NISOURCE COM 65473P105 598,089 -915 -0.15 16,723 1.81 0.0311
2023-02-10 2022-12-31 13F NISOURCE COM 65473P105 599,004 -70,578 -10.54 16,425 -2.63 0.0365
2022-11-14 2022-09-30 13F NISOURCE COM 65473P105 669,582 16,234 2.48 16,867 -12.62 0.0376
2022-08-15 2022-06-30 13F NISOURCE COM 65473P105 653,348 53,114 8.85 19,303 1.08 0.0417
2022-05-13 2022-03-31 13F NISOURCE COM 65473P105 600,234 104,547 21.09 19,096 39.35 0.0384
2022-02-14 2021-12-31 13F NISOURCE COM 65473P105 495,687 100,190 25.33 13,704 42.76 0.0257
2021-11-12 2021-09-30 13F NISOURCE COM 65473P105 395,497 -16,429 -3.99 9,599 -4.91 0.0201
2021-08-06 2021-06-30 13F NISOURCE COM 65473P105 411,926 126,789 44.47 10,095 46.92 0.0224
2021-05-12 2021-03-31 13F NISOURCE COM 65473P105 285,137 32,878 13.03 6,871 18.67 0.0173
2021-02-08 2020-12-31 13F NISOURCE COM 65473P105 252,259 101,351 67.16 5,790 74.24 0.0150
2020-12-04 2020-09-30 13F/A-1 NISOURCE COM 65473P105 150,908 75,195 99.32 3,323 92.97 0.0096
2020-11-06 2020-09-30 13F NISOURCE COM 65473P105 152,928 77,215 3,367 8,106.9874
2020-08-17 2020-06-30 13F/A-1 NISOURCE COM 65473P105 75,713 3,131 4.31 1,722 -4.97 0.0053
2020-08-11 2020-06-30 13F NISOURCE COM 65473P105 62,166 -10,416 1,712 4,643.8911
2020-05-14 2020-03-31 13F NISOURCE COM 65473P105 72,582 11,259 18.36 1,812 6.21 0.0067
2020-02-06 2019-12-31 13F NISOURCE COM 65473P105 61,323 -14,603 -19.23 1,706 -24.85 0.0051
2019-11-12 2019-09-30 13F NISOURCE COM 65473P105 75,926 -62,549 -45.17 2,270 -43.06 0.0058
2019-08-14 2019-06-30 13F NISOURCE COM 65473P105 138,475 70,845 104.75 3,987 105.83 0.0130
2019-05-15 2019-03-31 13F NISOURCE COM 65473P105 67,630 29,573 77.71 1,937 104.11 0.0065
2019-02-13 2018-12-31 13F NISOURCE COM 65473P105 38,057 2,349 6.58 949 6.15 0.0034
2018-11-08 2018-09-30 13F NISOURCE COM 65473P105 35,708 -156,247 -81.40 894 -82.28 0.0032
2018-08-03 2018-06-30 13F NISOURCE COM 65473P105 191,955 -17,521 -8.36 5,044 0.72 0.0171
2018-05-11 2018-03-31 13F NISOURCE COM 65473P105 209,476 9,411 4.70 5,008 -2.49 0.0192
2018-02-08 2017-12-31 13F NISOURCE COM 65473P105 200,065 49,325 32.72 5,136 33.16 0.0178
2017-11-06 2017-09-30 13F NISOURCE COM 65473P105 150,740 63,158 72.11 3,857 73.66 0.0137
2017-07-31 2017-06-30 13F NISOURCE COM 65473P105 87,582 -40,008 -31.36 2,221 -26.84 0.0089
2017-05-05 2017-03-31 13F NISOURCE COM 65473P105 127,590 -62,026 -32.71 3,036 -27.70 0.0133
2017-02-02 2016-12-31 13F NISOURCE COM 65473P105 189,616 11,779 6.62 4,199 -2.05 0.0203
2016-11-04 2016-09-30 13F NISOURCE COM 65473P105 177,837 36,472 25.80 4,287 14.35 0.0218
2016-08-11 2016-06-30 13F NISOURCE COM 65473P105 141,365 -13,750 -8.86 3,749 2.57 0.0225
2016-05-10 2016-03-31 13F/A-1 NISOURCE COM 65473P105 155,115 -1,927 -1.23 3,655 19.29 0.0227
2016-02-03 2015-12-31 13F NISOURCE COM 65473P105 157,042 1,597 1.03 3,064 6.28 0.0187
2015-11-02 2015-09-30 13F/A-1 NISOURCE COM 65473P105 155,445 137,145 749.43 2,883 842.16 0.0265
2015-10-30 2015-09-30 13F DIREXION SHS ETF TR COM 65473P105 155,445 2,885
2015-08-07 2015-06-30 13F/A-1 NISOURCE EX DISTRIB WI 65473P113 18,300 -115,111 -86.28 306 -94.80 0.0028
2015-08-07 2015-06-30 13F/A-1 NISOURCE COM 65473P105 126,373 -7,038 5,761 0.0521
2015-08-04 2015-06-30 13F NISOURCE EX DISTRIB WI 65473P113 18,300 -115,111 306 0.0028
2015-08-04 2015-06-30 13F NISOURCE COM 65473P105 126,373 -7,038 5,761 0.0521
2015-05-14 2015-03-31 13F/A-1 NISOURCE COM 65473P105 133,411 17,985 15.58 5,889 20.28 0.0511
2015-05-01 2015-03-31 13F NISOURCE COM 65473P105 133,411 5,889
2015-02-10 2014-12-31 13F NISOURCE COM 65473P105 115,426 115,426 4,896 0.0433
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.