Every 424B that NiSource Inc. (NI) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 424B covers the supplement that carries the terms of a priced offering, so if you follow NI and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full NI filings page.
NiSource Inc. is offering $750,000,000 of 6.250% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due April 15, 2057. The Notes pay a fixed 6.250% coupon from August 18, 2026 to April 15, 2032, then reset every five years to the Five-year U.S. Treasury Rate + 1.930%, with a floor of 6.250%. Interest is paid semi-annually on April 15 and October 15, starting April 15, 2027.
The Notes are unsecured and junior subordinated to approximately $15.2 billion of NiSource Senior Indebtedness and structurally subordinated to about $0.3 billion of subsidiary debt, but rank pari passu with $2.0 billion of existing similar junior subordinated notes. NiSource may defer interest for up to 20 consecutive semi-annual periods per deferral, during which interest (and deferred interest) continues to compound, and may redeem the Notes at par beginning 90 days before the first reset date and on later interest payment dates, or at specified premiums after certain tax, rating, or tax credit events.
The Notes will be sold at 100% of principal, with a 1.000% underwriting discount, generating approximately $742,500,000 in net proceeds before expenses. NiSource intends to use the proceeds for general corporate purposes, including capital expenditures, working capital, and repayment of existing indebtedness. The Notes will not be listed on any securities exchange and will clear through DTC, with access via Clearstream and Euroclear.
NiSource Inc. is issuing new Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2057 under its existing shelf registration. The notes pay a fixed rate from the original issue date in August 2026 until April 15, 2032, then reset every five years to the Five-year U.S. Treasury Rate plus a spread, with a floor equal to the initial fixed rate, and mature on April 15, 2057.
The notes are unsecured and subordinated to approximately $15.2 billion of Senior Indebtedness and structurally subordinated to obligations of NiSource’s subsidiaries, which had about $0.3 billion of indebtedness outstanding as of June 30, 2026. They rank pari passu with NiSource’s existing $500 million 6.950% junior subordinated notes due 2054, $500 million 6.375% junior subordinated notes due 2055 and $1 billion 5.750% junior subordinated notes due 2056. NiSource may defer interest for up to 20 consecutive semi-annual periods at a time, during which interest (including deferred interest) compounds, and has multiple redemption options, including at par around reset dates and upon certain tax, rating-agency and tax-credit events.
The notes will be issued in minimum denominations of $2,000, will not be listed on any securities exchange, and are expected to settle through DTC, Clearstream and Euroclear. NiSource plans to use net proceeds for general corporate purposes, including capital expenditures, working capital and repayment of borrowings under its revolving credit facility and commercial paper program.
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.
NiSource Inc. launched a preliminary prospectus supplement for a primary offering of Fixed‑to‑Fixed Reset Rate Junior Subordinated Notes due July 15, 2056. The Notes will pay a fixed rate from the original issue date to the first reset on July 15, 2031, then reset every five years to the Five‑year U.S. Treasury Rate plus a spread, with a floor equal to the initial fixed rate. Interest is payable semi‑annually on January 15 and July 15, beginning July 15, 2026.
The Notes are unsecured and rank junior to NiSource’s Senior Indebtedness, and pari passu with its existing junior subordinated notes. NiSource may defer interest for up to 20 consecutive semi‑annual periods, with deferred amounts compounding. Optional redemption is allowed during the 90 days before the first reset and on any interest date thereafter; the Notes may also be redeemed at 100% upon a Tax Event or 102% upon a Rating Agency Event. The Notes will be issued in $2,000 minimum denominations (and $1,000 increments), settled through DTC, and will not be listed. Net proceeds are intended for general corporate purposes, including capital expenditures, working capital and debt repayment.
NiSource Inc. (NI) launched an at-the‑market offering of up to $1,500,000,000 of common stock, to be sold from time to time through multiple sales agents or via forward sale agreements with their affiliates. This new program supersedes the prior $900,000,000 ATM and includes approximately $47.5 million of unsold shares from that program.
Sales may occur on the NYSE or through negotiated transactions, with agent and forward selling commissions of up to 2%. NiSource will not initially receive proceeds from any borrowed shares sold by a forward seller; cash would generally be received upon physical settlement of the related forward, while cash or net share settlement could reduce or eliminate proceeds and may require NiSource to deliver cash or shares. The program caps total gross sales at $1,500,000,000 and ends upon reaching that cap, by December 31, 2028, or upon earlier termination. Net proceeds to NiSource are intended for general corporate purposes, including capital expenditures, working capital and debt repayment. NI last traded at $42.13 per share on October 30, 2025.