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JOHNSON WILLIAM D reported acquisition or exercise transactions in this Form 4 filing.
NiSource Inc. director William D. Johnson received an equity grant as part of his annual board compensation. He was awarded 3,807 shares of common stock in the form of restricted stock units (RSUs) valued at $47.03 per share. These RSUs vest in full on the first anniversary of the grant date, subject to specified acceleration conditions.
Each RSU represents a contingent right to receive one share of NiSource common stock under the company’s 2020 Omnibus Plan. The award also includes additional RSUs credited through dividend equivalent provisions, which follow the same vesting terms. After this grant, Johnson holds a total of 28,431.355 shares directly.
Jesanis Michael E reported acquisition or exercise transactions in this Form 4 filing.
NISOURCE INC. director Michael E. Jesanis received an award of 3,807 restricted stock units of common stock as part of his non-employee director annual compensation. The award is valued at $47.03 per share and represents a contingent right to receive shares upon vesting.
The RSUs vest in full on the first anniversary of the grant date, subject to certain acceleration conditions, under the Company’s 2020 Omnibus Plan. The amount also includes RSUs credited through dividend equivalent provisions, which follow the same vesting conditions.
After this grant, Jesanis directly holds 22,481.676 shares of common stock and has an additional 30,189.569 shares reported as indirectly owned by his spouse. These entries reflect compensation and holdings rather than open-market buying or selling.
NISOURCE INC. director Deborah Hersman received an equity grant as part of her annual board compensation. She was awarded 3,807 restricted stock units at a reference value of $47.03 per unit, increasing her direct holdings to 47,199.674 common shares.
The RSUs vest in full on the first anniversary of the grant date, subject to certain acceleration conditions, and each RSU will convert into one share of common stock upon vesting under the company’s 2020 Omnibus Plan. The reported amount also reflects additional RSUs credited through dividend equivalent provisions, which follow the same vesting schedule.
NiSource Inc. director Deborah A. Henretta received an equity grant tied to her annual board compensation. On May 11, 2026, she was awarded 3,807 shares of common stock in the form of restricted stock units at a reference price of $47.03 per share under the 2020 Omnibus Plan. These RSUs, including units from dividend equivalent provisions, vest in full on the first anniversary of the grant date, after which each unit converts into one share of common stock. Following this award, her direct holdings increased to 77,152.048 shares.
NISOURCE INC. director Eric L. Butler received an award of 3,807 shares of common stock in the form of restricted stock units as part of his non-employee director annual compensation. The RSUs vest in full on the first anniversary of the grant date and each unit converts into one share of common stock upon vesting under the company’s 2020 Omnibus Plan. Following this grant and related dividend-equivalent RSUs, Butler holds a total of 67,692.322 shares and RSUs directly.
Bunting Theodore H JR reported acquisition or exercise transactions in this Form 4 filing.
NISOURCE INC. director Theodore H. Bunting Jr. received an equity grant as part of his annual non-employee director compensation. He was awarded 3,807 restricted stock units (RSUs), each representing a contingent right to receive one share of common stock upon vesting under the Company’s 2020 Omnibus Plan.
The RSUs vest in full on the first anniversary of the grant date, subject to specified acceleration conditions. The reported post-transaction holding is 49,931.542 shares of common stock, which includes RSUs credited through dividend equivalent provisions that share the same vesting conditions.
Barbour Sondra L reported acquisition or exercise transactions in this Form 4 filing.
NiSource Inc. director Sondra L. Barbour received an award of 3,807 restricted stock units as part of her annual non-employee director compensation, valued at $47.03 per unit on the grant date. These RSUs vest in full on the first anniversary of the grant date, subject to certain acceleration conditions, and each represents a contingent right to receive one share of NiSource common stock upon vesting under the company’s 2020 Omnibus Plan.
The award amount also reflects RSUs credited under the dividend equivalent provisions of prior RSU awards, which vest on the same schedule as the underlying RSUs. Following this grant, Barbour’s directly held position, including RSUs, is reported at 29,197.331 shares of common stock and RSUs.
NISOURCE INC. director Peter Altabef received an equity grant in the form of restricted stock units as part of his annual compensation. The award covers 3,807 shares of common stock at a reference value of $47.03 per share, classified as a grant or other acquisition rather than an open-market purchase. These RSUs vest in full on the first anniversary of the grant date, subject to specified acceleration conditions, and represent a contingent right to receive one share of common stock for each unit under the company’s 2020 Omnibus Plan. The total reported direct holdings after this award are 56,615.459 shares, including RSUs credited through dividend equivalent provisions that follow the same vesting schedule.
NiSource Inc. reported the final voting results from its annual meeting held on May 11, 2026. Shareholders elected all 12 director nominees, each receiving more than 405 million votes for, with broker non-votes of 25,018,609 on each director item.
Shareholders approved the advisory vote on named executive officer compensation, with 398,500,583 votes for, 20,428,879 against, 1,402,092 abstentions, and 25,018,609 broker non-votes. They also ratified the appointment of Deloitte & Touche LLP as independent registered public accounting firm for 2026, with 419,507,200 votes for, 25,068,686 against, and 774,277 abstentions.
NiSource Inc. is offering $1,250,000,000 aggregate principal amount of senior unsecured notes in two series: $500,000,000 4.750% Notes due May 18, 2031 and $750,000,000 5.300% Notes due May 18, 2036.
The notes pay interest semi-annually beginning November 18, 2026, will be issued in denominations of $2,000 and integral multiples of $1,000, will rank equally with other senior unsecured indebtedness and are offered pursuant to this prospectus supplement dated May 11, 2026.