Cuccia Kimberly S 4

What Happened

• Kimberly S. Cuccia, EVP, General Counsel & Corporate Secretary of NiSource (NI), had 30,744 shares issued to her on 2026-02-27 as the vesting of performance stock units (award). The award was recorded at $47.30 per share (30,744 × $47.30 = $1,454,191).
• To satisfy tax withholding obligations in connection with vesting, 12,109 shares and 3,093 shares were withheld (disposed) at the same $47.30 price for values of $572,756 and $146,299 respectively. After withholding, Cuccia retained a net 15,542 shares (30,744 − 15,202), with a net value of roughly $735,137 at $47.30.

Key Details

• Transaction date: February 27, 2026; Form filed March 3, 2026 (timely filing).
• Prices and values: Award 30,744 @ $47.30 = $1,454,191; withholding 12,109 @ $47.30 = $572,756; withholding 3,093 @ $47.30 = $146,299.
• Transaction codes: A = Award/Grant (vesting of PSUs); F = shares withheld for tax withholding.
• Footnotes: F1 notes the vesting relates to 2023 non-derivative performance stock units (exempt under Rule 16b-3(d)); F2/F3 confirm shares withheld to satisfy tax obligations for the vested awards; F4 notes shares acquired through the NiSource Retirement Savings Plan through Feb 27, 2026.
• Shares owned after the transaction are not shown in the provided summary (not reported here).

Context

• This was a vesting event with shares withheld for taxes (a routine, non-open-market transaction) rather than an open-market buy or sell. Such withholdings are common and do not necessarily indicate a change in insider sentiment.