| Id | Content |
|---|---|
| F1 | Vesting of non-derivative performance stock units granted in 2021, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d). |
| F2 | Vesting of non-derivative special performance stock units granted in 2021, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d). |
| F3 | Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above. |
| F4 | Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the special performance stock units above. |
| F5 | Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the 2021 Restricted Stock Unit award. |
| F6 | Includes shares acquired through dividend reinvestments. |
| F7 | Constitutes shares acquired through the NiSource Inc. Retirement Savings Plan through February 28, 2024. |