NI

SEC source: 0001127602-19-003686 · form4.xml · nonDerivative · entry 1

Mulpas Joseph W · CIK 0001464702 · VP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,623

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 28, 2022 provided that the reporting person is continuously employed by the Company through and including that date.

SEC source: 0001127602-19-003685 · form4.xml · nonDerivative · entry 1

Sistovaris Violet · CIK 0001646748 · EVP and President, NIPSCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 122,089

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 28, 2022 provided that the reporting person is continuously employed by the Company through and including that date.

SEC source: 0001127602-19-003684 · form4.xml · nonDerivative · entry 1

Vegas Pablo · CIK 0001673333 · EVP & President, Gas Utilities

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,114

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 28, 2022 provided that the reporting person is continuously employed by the Company through and including that date.

SEC source: 0001127602-19-003682 · form4.xml · nonDerivative · entry 1

Surface Suzanne K. · CIK 0001674899 · Chief Services Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,692

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 28, 2022 provided that the reporting person is continuously employed by the Company through and including that date.

SEC source: 0001127602-18-032590 · form4.xml · nonDerivative · entry 1

Brown Donald Eugene · CIK 0001638426 · EVP & Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,767

F1 · shares: The sale reported in this Form 4 was effected pursuant to Rule 10b5-1 trading plan adopted by the reporting person on 8-3-2018.

SEC source: 0001127602-18-027012 · form4.xml · nonDerivative · entry 1

Bunting Theodore H JR · CIK 0001399319 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,366.966

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's compensation.

SEC source: 0001127602-18-025230 · form4.xml · nonDerivative · entry 2

Hightman Carrie J · CIK 0001419782 · EVP & Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 316,619

SEC source: 0001127602-18-025230 · form4.xml · nonDerivative · entry 1

Hightman Carrie J · CIK 0001419782 · EVP & Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 325,066

SEC source: 0001127602-18-025064 · form4.xml · nonDerivative · entry 1

Brown Donald Eugene · CIK 0001638426 · EVP & Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,167

F1 · shares: The sale reported in this Form 4 was effected pursuant to a Rule 10B5-1 trading plan adopted by the reporting person on 8-3-2018.

SEC source: 0001127602-18-025101 · form4.xml · nonDerivative · entry 1

Hamrock Joseph · CIK 0001549221 · Director · Director, and President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 342,254

F1 · shares: Represents shares contributed to a donor advised charitable fund.

SEC source: 0001127602-18-018977 · form4.xml · nonDerivative · entry 1

Vegas Pablo · CIK 0001673333 · EVP, Gas Business Seg & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,049

SEC source: 0001127602-18-018959 · form4.xml · nonDerivative · entry 1

Disser Peter T · CIK 0001719449 · Vice President, Audit

10b5-1 filing: Not disclosed

Ownership: Indirect · Company Stock Fund in 401(k)

Disclosed balance after: 0.4129

SEC source: 0001127602-18-016896 · form4.xml · nonDerivative · entry 1

BUTLER ERIC L · CIK 0001544184 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,686.622

SEC source: 0001127602-18-016750 · form4.xml · nonDerivative · entry 1

HENRETTA DEBORAH A · CIK 0001282881 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,869.748

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016749 · form4.xml · nonDerivative · entry 1

DeVeydt Wayne S · CIK 0001321392 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,922.146

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016746 · form4.xml · nonDerivative · entry 1

Jesanis Michael E · CIK 0001434733 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,833.152

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016744 · form4.xml · nonDerivative · entry 1

Candris Aristides S · CIK 0001547949 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,372.724

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016743 · form4.xml · nonDerivative · entry 1

KABAT KEVIN T · CIK 0001024525 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,439.602

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016742 · form4.xml · nonDerivative · entry 1

BUTLER ERIC L · CIK 0001544184 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,686.622

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016741 · form4.xml · nonDerivative · entry 1

THOMPSON RICHARD L · CIK 0001122800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,075.52

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016739 · form4.xml · nonDerivative · entry 1

ALTABEF PETER · CIK 0001199359 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,599.365

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016738 · form4.xml · nonDerivative · entry 1

WOO CAROLYN Y · CIK 0001205211 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,685.971

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. 2010 Omnibus Incentive Plan. The RSUs are granted as part of the non-employee director's annual compensation and vest in full on the last day of the director's annual term for which the RSUs are awarded, subject to certain acceleration conditions.

SEC source: 0001127602-18-016693 · form4.xml · nonDerivative · entry 1

Smith Teresa M · CIK 0001673746 · VP, Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,872.514

F1 · price: The price reported in this column is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.32 to $25.50, 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: 0001127602-18-016440 · form4.xml · nonDerivative · entry 1

Vegas Pablo · CIK 0001673333 · EVP, Gas Business Seg & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,549

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2016 stock awards.

SEC source: 0001127602-18-004275 · form4.xml · nonDerivative · entry 1

Surface Suzanne K. · CIK 0001674899 · VP, Corp Srvcs Customer Value

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,393

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-004274 · form4.xml · nonDerivative · entry 1

Sistovaris Violet · CIK 0001646748 · EVP and President, NIPSCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 116,590

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-004272 · form4.xml · nonDerivative · entry 1

Hightman Carrie J · CIK 0001419782 · EVP & Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 343,619

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-004269 · form4.xml · nonDerivative · entry 1

Smith Teresa M · CIK 0001673746 · VP, Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,620

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-004265 · form4.xml · nonDerivative · entry 1

Mulpas Joseph W · CIK 0001464702 · VP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,973

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-004264 · form4.xml · nonDerivative · entry 1

LEVANDER CARL W · CIK 0001079626 · EVP, Reg. Policy & Corp. Aff.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,324.254

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-004263 · form4.xml · nonDerivative · entry 1

Finissi Michael J · CIK 0001706650 · EVP Safety Capital & Tech Srvc

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,051.171

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-004262 · form4.xml · nonDerivative · entry 1

Disser Peter T · CIK 0001719449 · Vice President, Audit

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,695

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-004259 · form4.xml · nonDerivative · entry 1

Brown Donald Eugene · CIK 0001638426 · EVP & Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,567

F1 · shares: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of 2015 restricted stock unit awards.

SEC source: 0001127602-18-002780 · form4.xml · nonDerivative · entry 1

Hamrock Joseph · CIK 0001549221 · Director · Director, and President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 358,649

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 118,991 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 136,178 shares underlying the PSUs granted to the reporting person on January 27, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002779 · form4.xml · nonDerivative · entry 1

Mulpas Joseph W · CIK 0001464702 · VP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,897

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 10,709 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 10,126 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002778 · form4.xml · nonDerivative · entry 1

Disser Peter T · CIK 0001719449 · Vice President, Audit

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,593

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 8,329 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 7,876 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002777 · form4.xml · nonDerivative · entry 1

Finissi Michael J · CIK 0001706650 · EVP Safety Capital & Tech Srvc

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,151.171

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 10,709 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 19,466 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002776 · form4.xml · nonDerivative · entry 1

LEVANDER CARL W · CIK 0001079626 · EVP, Reg. Policy & Corp. Aff.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,878.254

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 21,418 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 20,252 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002775 · form4.xml · nonDerivative · entry 1

Smith Teresa M · CIK 0001673746 · VP, Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,698

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 4,284 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 4,050 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002774 · form4.xml · nonDerivative · entry 1

Surface Suzanne K. · CIK 0001674899 · VP, Corp Srvcs Customer Value

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,944

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 7,139 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 6,751 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002773 · form4.xml · nonDerivative · entry 1

Vegas Pablo · CIK 0001673333 · EVP, Gas Business Seg & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,570

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 21,636 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 37,904 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002772 · form4.xml · nonDerivative · entry 1

Sistovaris Violet · CIK 0001646748 · EVP and President, NIPSCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 116,417

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 28,558 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 29,253 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002771 · form4.xml · nonDerivative · entry 1

Brown Donald Eugene · CIK 0001638426 · EVP & Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,432

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 40,457 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 40,504 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-002770 · form4.xml · nonDerivative · entry 1

Hightman Carrie J · CIK 0001419782 · EVP & Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 344,336

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. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided that the reporting person is continuously employed by the Company through and including that date.

F2 · balance_after: This figure has been reduced by (1) 35,697 shares underlying the performance share units ("PSUs") granted to the reporting person on January 29, 2016, and (2) 33,753 shares underlying the PSUs granted to the reporting person on January 26, 2017. These PSUs were previously reported on Forms 4 as beneficially owned by the reporting person. However, the vesting of these PSUs is subject to the satisfaction and confirmation of performance measures not based solely on the market price of the Common Stock. As such, the reporting person may not be deemed to beneficially own these PSUs until the performance measures are satisfied and confirmed.

SEC source: 0001127602-18-003717 · form4a.xml · nonDerivative · entry 1

Brown Donald Eugene · CIK 0001638426 · EVP & Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,988

F1 · shares: Amends the number of Restricted Stock Units ("RSUs") reported on the reporting person's Form 4 filed on 1/29/18. Each RSU represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided the officer is continuously employed by the Company through and including that date.

SEC source: 0001127602-18-003708 · form4a.xml · nonDerivative · entry 1

Vegas Pablo · CIK 0001673333 · EVP, Gas Business Seg & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,126

F1 · shares: Amends the number of Restricted Stock Units ("RSUs") reported on the reporting person's Form 4 filed on 1/29/18. Each RSU represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided the officer is continuously employed by the Company through and including that date.

SEC source: 0001127602-18-003694 · form4a.xml · nonDerivative · entry 1

Sistovaris Violet · CIK 0001646748 · EVP and President, NIPSCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,563

F1 · shares: Amends the number of Restricted Stock Units ("RSUs") reported on the reporting person's Form 4 filed on 1/29/18. Each RSU represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided the officer is continuously employed by the Company through and including that date.

SEC source: 0001127602-18-003683 · form4a.xml · nonDerivative · entry 1

Hightman Carrie J · CIK 0001419782 · EVP & Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 345,482

F1 · shares: Amends the number of Restricted Stock Units ("RSUs") reported on the reporting person's Form 4 filed on 1/29/18. Each RSU represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided the officer is continuously employed by the Company through and including that date.

SEC source: 0001127602-18-003672 · form4a.xml · nonDerivative · entry 1

Finissi Michael J · CIK 0001706650 · EVP Safety Capital & Tech Srvc

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,970.171

F1 · shares: Amends the number of Restricted Stock Units ("RSUs") reported on the reporting person's Form 4 filed on 1/29/18. Each RSU represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided the officer is continuously employed by the Company through and including that date.

SEC source: 0001127602-18-003665 · form4a.xml · nonDerivative · entry 1

Disser Peter T · CIK 0001719449 · Vice President, Audit

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,879

F1 · shares: Amends the number of Restricted Stock Units ("RSUs") reported on the reporting person's Form 4 filed on 1/29/18. Each RSU represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2010 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 26, 2021 provided the officer is continuously employed by the Company through and including that date.