Statements of Net Assets Available for Benefits - EBP 005 - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Investments - at fair value:
Total investments	$ 2,314,717,802	$ 1,995,108,955
Notes receivable from participants	39,753,654	37,863,856
Net Assets Available for Benefits	2,354,471,456	2,032,972,811
Common collective trusts
Investments - at fair value:
Total investments	1,861,797,911	1,344,531,873
Mutual funds
Investments - at fair value:
Total investments	142,728,000	349,785,674
NiSource Stock Fund
Investments - at fair value:
Total investments	240,386,845	223,369,418
Money market fund
Investments - at fair value:
Total investments	$ 69,805,046	$ 77,421,990

Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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+ Details

- Definition

Amount of asset less liability available to pay benefit of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, aggregation of participants' individual account balances.

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