NI

SEC source: 0001111711-26-000089 · form4.xml · nonDerivative · entry 1

BIRMINGHAM MELODY · CIK 0001738248 · EVP & Grp President, Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,527.151

F1 · shares: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.39 to $42.42, inclusive. The reporting person undertakes to provide to NiSource Inc., any security holder of NiSource Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001111711-26-000078 · form4.xml · nonDerivative · entry 1

Jesanis Michael E · CIK 0001434733 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,700.791

F1 · shares: Transfer of shares from indirectly held to directly held, which transfer is exempt from Section 16 reporting under Rule 16a-13.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000074 · form4.xml · nonDerivative · entry 1

Berman Melanie B. · CIK 0001933743 · EVP Administration & CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,989.9347

F1 · shares: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.670 to $47.713, inclusive. The reporting person undertakes to provide to NiSource Inc., any security holder of NiSource Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001111711-26-000073 · form4.xml · nonDerivative · entry 1

Yates Lloyd M · CIK 0001311411 · Director · Director and President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 519,556.732

F1 · shares: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.730 to $47.745, inclusive. The reporting person undertakes to provide to NiSource Inc., any security holder of NiSource Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of his director RSU awards from 2020 and 2021, and which are subject to the same vesting conditions as the underlying RSUs.

F3 · balance_after: Includes shares acquired through the NiSource Inc. Employee Stock Purchase Plan.

SEC source: 0001111711-26-000071 · form4.xml · nonDerivative · entry 2

BIRMINGHAM MELODY · CIK 0001738248 · EVP & Grp President, Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 116,036.324

F2 · balance_after: Includes shares acquired through dividend reinvestments.

SEC source: 0001111711-26-000071 · form4.xml · nonDerivative · entry 1

BIRMINGHAM MELODY · CIK 0001738248 · EVP & Grp President, Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 117,899.295

F1 · shares: Late due to administrative error.

SEC source: 0001111711-26-000069 · form4.xml · nonDerivative · entry 1

Lee Cassandra S. · CIK 0001851009 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,974.049

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000067 · form4.xml · nonDerivative · entry 1

McAvoy John · CIK 0001564677 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,777.114

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000063 · form4.xml · nonDerivative · entry 1

KABAT KEVIN T · CIK 0001024525 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,455.698

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000061 · form4.xml · nonDerivative · entry 1

JOHNSON WILLIAM D · CIK 0001183048 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,431.355

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000057 · form4.xml · nonDerivative · entry 1

Hersman Deborah · CIK 0001778660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,199.674

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000059 · form4.xml · nonDerivative · entry 1

Jesanis Michael E · CIK 0001434733 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,481.676

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000055 · form4.xml · nonDerivative · entry 1

HENRETTA DEBORAH A · CIK 0001282881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,152.048

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000053 · form4.xml · nonDerivative · entry 1

BUTLER ERIC L · CIK 0001544184 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,692.322

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000051 · form4.xml · nonDerivative · entry 1

Bunting Theodore H JR · CIK 0001399319 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,931.542

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000047 · form4.xml · nonDerivative · entry 1

ALTABEF PETER · CIK 0001199359 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,615.459

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions.RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000049 · form4.xml · nonDerivative · entry 1

Barbour Sondra L · CIK 0001573610 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,197.331

F1 · shares: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000037 · form4.xml · nonDerivative · entry 3

Yates Lloyd M · CIK 0001311411 · Director · Director and President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 539,292.483

F3 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the 2023 Restricted Stock Unit award.

F4 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of his director RSU awards from 2020 and 2021, and which are subject to the same vesting conditions as the underlying RSUs.

F5 · balance_after: Includes shares acquired through the NiSource Inc. Employee Stock Purchase Plan.

SEC source: 0001111711-26-000037 · form4.xml · nonDerivative · entry 2

Yates Lloyd M · CIK 0001311411 · Director · Director and President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 554,725.483

F2 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

SEC source: 0001111711-26-000037 · form4.xml · nonDerivative · entry 1

Yates Lloyd M · CIK 0001311411 · Director · Director and President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 672,010.483

F1 · shares: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000036 · form4.xml · nonDerivative · entry 3

Luhrs Michael · CIK 0001921786 · EVP, Tech, Customer & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120,178.128

F3 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the 2023 Restricted Stock Unit award.

F4 · balance_after: Includes shares acquired through the NiSource Inc. Employee Stock Purchase Plan.

SEC source: 0001111711-26-000036 · form4.xml · nonDerivative · entry 2

Luhrs Michael · CIK 0001921786 · EVP, Tech, Customer & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,806.128

F2 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

SEC source: 0001111711-26-000036 · form4.xml · nonDerivative · entry 1

Luhrs Michael · CIK 0001921786 · EVP, Tech, Customer & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 151,375.128

F1 · shares: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000035 · form4.xml · nonDerivative · entry 3

Jefferson William Jr. · CIK 0001935312 · EVP, Chief Op & Safety Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,375

F3 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the 2023 Restricted Stock Unit award.

SEC source: 0001111711-26-000035 · form4.xml · nonDerivative · entry 2

Jefferson William Jr. · CIK 0001935312 · EVP, Chief Op & Safety Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 101,853

F2 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

SEC source: 0001111711-26-000035 · form4.xml · nonDerivative · entry 1

Jefferson William Jr. · CIK 0001935312 · EVP, Chief Op & Safety Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 127,357

F1 · shares: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000034 · form4.xml · nonDerivative · entry 3

Gode Gunnar · CIK 0001770544 · SVP Chief Accting&Tax Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,108

F3 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the 2023 Restricted Stock Unit award.

SEC source: 0001111711-26-000034 · form4.xml · nonDerivative · entry 2

Gode Gunnar · CIK 0001770544 · SVP Chief Accting&Tax Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,775

F2 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

SEC source: 0001111711-26-000034 · form4.xml · nonDerivative · entry 1

Gode Gunnar · CIK 0001770544 · SVP Chief Accting&Tax Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,677

F1 · shares: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000033 · form4.xml · nonDerivative · entry 3

Cuccia Kimberly S · CIK 0001900971 · EVP, GC & Corporate Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,726

F3 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the 2023 Restricted Stock Unit award.

SEC source: 0001111711-26-000033 · form4.xml · nonDerivative · entry 2

Cuccia Kimberly S · CIK 0001900971 · EVP, GC & Corporate Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,819

F2 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

SEC source: 0001111711-26-000033 · form4.xml · nonDerivative · entry 1

Cuccia Kimberly S · CIK 0001900971 · EVP, GC & Corporate Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,928

F1 · shares: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000032 · form4.xml · nonDerivative · entry 3

BIRMINGHAM MELODY · CIK 0001738248 · EVP & Grp President, Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 127,899.295

F3 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the 2023 Restricted Stock Unit award.

F4 · balance_after: Includes shares acquired through dividend reinvestments.

SEC source: 0001111711-26-000032 · form4.xml · nonDerivative · entry 2

BIRMINGHAM MELODY · CIK 0001738248 · EVP & Grp President, Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 132,007.295

F2 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

SEC source: 0001111711-26-000032 · form4.xml · nonDerivative · entry 1

BIRMINGHAM MELODY · CIK 0001738248 · EVP & Grp President, Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 162,434.295

F1 · shares: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000031 · form4.xml · nonDerivative · entry 3

Berman Melanie B. · CIK 0001933743 · EVP Administration & CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,989.9347

F3 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the 2023 Restricted Stock Unit award.

SEC source: 0001111711-26-000031 · form4.xml · nonDerivative · entry 2

Berman Melanie B. · CIK 0001933743 · EVP Administration & CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,155.9347

F2 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

SEC source: 0001111711-26-000031 · form4.xml · nonDerivative · entry 1

Berman Melanie B. · CIK 0001933743 · EVP Administration & CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,828.9347

F1 · shares: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000030 · form4.xml · nonDerivative · entry 5

Anderson Shawn · CIK 0001813738 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 165,101.298

F5 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vestings of the 2023 Restricted Stock Unit awards.

F6 · balance_after: Includes shares acquired through dividend reinvestments.

SEC source: 0001111711-26-000030 · form4.xml · nonDerivative · entry 4

Anderson Shawn · CIK 0001813738 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 169,515.298

F4 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the special performance stock units above.

SEC source: 0001111711-26-000030 · form4.xml · nonDerivative · entry 3

Anderson Shawn · CIK 0001813738 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 179,571.298

F3 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

SEC source: 0001111711-26-000030 · form4.xml · nonDerivative · entry 2

Anderson Shawn · CIK 0001813738 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 193,276.298

F2 · shares: Vesting of non-derivative special performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000030 · form4.xml · nonDerivative · entry 1

Anderson Shawn · CIK 0001813738 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 169,393.298

F1 · shares: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

SEC source: 0001111711-26-000029 · form4.xml · nonDerivative · entry 1

Gode Gunnar · CIK 0001770544 · SVP Chief Accting&Tax Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,257

SEC source: 0001111711-26-000028 · form4.xml · nonDerivative · entry 1

Anderson Shawn · CIK 0001813738 · EVP & CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 136,301.581

F1 · shares: The reported sale of 12,500 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 10, 2025.

F2 · balance_after: Includes shares acquired through dividend reinvestments.

SEC source: 0001111711-26-000018 · form4.xml · nonDerivative · entry 1

Anderson Shawn · CIK 0001813738 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 148,801.581

F1 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the partial vesting of the 2024 Special Restricted Stock Unit award.

F2 · balance_after: Includes shares acquired through dividend reinvestments.

SEC source: 0001111711-26-000017 · form4.xml · nonDerivative · entry 1

Yates Lloyd M · CIK 0001311411 · Director · Director and President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 395,949.938

F1 · shares: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2020 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 28, 2029, provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: Includes shares acquired through the NiSource Inc. Employee Stock Purchase Plan.

F3 · balance_after: This amount includes RSUs received pursuant to the dividend equivalent provisions of his director RSU awards from 2020 and 2021, and which are subject to the same vesting conditions as the underlying RSUs.

SEC source: 0001111711-26-000016 · form4.xml · nonDerivative · entry 2

Luhrs Michael · CIK 0001921786 · EVP, Tech, Customer & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,564.128

F2 · shares: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the partial vesting of the 2025 Special Restricted Stock Unit award.

F3 · balance_after: Includes shares acquired through the NiSource Inc. Employee Stock Purchase Plan.

SEC source: 0001111711-26-000016 · form4.xml · nonDerivative · entry 1

Luhrs Michael · CIK 0001921786 · EVP, Tech, Customer & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 94,957.128

F1 · shares: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2020 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 28, 2029, provided that the reporting person is continuously employed by the Company through and including that date.

SEC source: 0001111711-26-000015 · form4.xml · nonDerivative · entry 1

Jefferson William Jr. · CIK 0001935312 · EVP, Chief Op & Safety Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,734

F1 · shares: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2020 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 28, 2029, provided that the reporting person is continuously employed by the Company through and including that date.