Welcome to our dedicated page for NiSource SEC filings (Ticker: NI), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
NiSource Inc. filings document a Delaware-regulated utility holding company with NYSE-listed common stock under the symbol NI. The company’s 8-K reports record periodic operating results, Regulation FD disclosures, material definitive agreements, financing arrangements, and exhibits furnished with Inline XBRL cover data.
NiSource regulatory documents also cover proxy governance matters, including director elections, executive compensation votes, and auditor ratification. Recent filings describe capital-structure activity such as revolving credit agreements, junior subordinated notes, equity distribution agreements, and utility-related disclosures involving NIPSCO service obligations, generation planning, regulatory approval processes, and related financing considerations.
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. delivered higher first-quarter 2026 results, with operating revenue rising to $2.36 billion from $2.18 billion and net income attributable to NiSource increasing to $507.1 million from $474.8 million. Diluted EPS improved to $1.06 from $1.00, reflecting growth across both Columbia and NIPSCO Operations.
Operating income climbed to $819.2 million, supported by higher customer revenues in gas distribution and electric generation, though costs of energy, operations and depreciation also increased. Operating cash flow was $442.3 million, down from $686.4 million, while capital expenditures expanded to $805.2 million, highlighting continued infrastructure and generation investment.
The company advanced its data center strategy through GenCo and NIPSCO, adding long-term energy storage and capacity agreements and growing VIE-backed renewable and generation assets. It also managed financing flexibility with a $2.50 billion revolving credit facility, expanded commercial paper usage, and an at-the-market equity program with remaining capacity of about $1.25 billion.
NiSource Inc. reported stronger first quarter 2026 results and raised its long‑term earnings growth outlook. GAAP net income available to common shareholders for the quarter ended March 31, 2026 was $510.7 million, or $1.06 per diluted share, up from $474.8 million, or $1.00, a year earlier.
Non‑GAAP adjusted net income available to common shareholders was $509.6 million, or $1.06 of consolidated adjusted EPS, compared with $462.3 million, or $0.98, for the same period of 2025. NiSource reaffirmed its 2026 non‑GAAP consolidated adjusted EPS guidance of $2.02–$2.07 and raised its 2026–2033 non‑GAAP consolidated adjusted EPS compound annual growth rate target to 9%–10%.
The company highlighted its GenCo model and collaborations with Alphabet and Amazon, which together are expected to deliver approximately $1.4 billion in customer value, support economic development in Indiana and help strengthen the grid to meet rising energy demand.
NiSource Inc is reported as having 36,215,860 shares beneficially owned, representing 7.55% of its Common Stock. The position is held by Vanguard Capital Management with 5,073,065 shares of sole voting power; filings state these holdings include securities held for Vanguard funds and managed accounts.
The filing is a Schedule 13G signed by Ashley Grim and notes holdings are reported on behalf of multiple client accounts.
NiSource Inc reported that Vanguard Portfolio Management disclosed beneficial ownership of 27,038,810 shares of Common Stock, representing 5.64% of the class as reported on the Schedule 13G. The filing shows sole voting power over 57,855 shares and sole dispositive power over 27,038,810 shares.
The statement clarifies these holdings include securities held for Vanguard funds and other managed accounts; no single other person is reported to hold more than 5% of the class.
NiSource Inc. is asking stockholders to vote at its 2026 annual meeting, to be held virtually on May 11, 2026 at 10:30 a.m. Central Time. Holders of common stock at the close of business on March 16, 2026, when 479,357,787 shares were outstanding, may vote, with each share entitled to one vote.
Stockholders will elect twelve directors, approve named executive officer compensation on an advisory “Say‑on‑Pay” basis, and ratify Deloitte & Touche LLP as independent auditor for 2026. The Board recommends voting FOR all director nominees, FOR Say‑on‑Pay, and FOR auditor ratification.
The Board highlights strong governance practices, including annual elections, majority voting with a resignation policy, proxy access, the right to call special meetings, and an independent chair. Executive pay is heavily performance‑based, supported by 2025 Say‑on‑Pay approval of about 97%. NiSource also emphasizes economic, environmental and social commitments, including a goal of net zero Scope 1 and 2 greenhouse gas emissions by 2040 and a focus on safety, customer experience and community engagement.
The Vanguard Group filed an amendment to its Schedule 13G/A for NiSource Inc. stating that, after an internal realignment, certain Vanguard subsidiaries will report beneficial ownership separately.
The filing reports Amount beneficially owned: 0 shares and Percent of class: 0%. The amendment notes the internal realignment occurred on January 12, 2026 and the filing was signed on 03/27/2026.
NiSource Inc. director and President & CEO Lloyd M. Yates reported equity compensation activity in the form of stock awards and related tax withholding. He acquired 275,962 shares of common stock on February 27, 2026 at $47.30 per share as a grant or award.
On the same date, 117,285 shares and 15,433 shares were disposed of at $47.30 per share to cover tax withholding obligations tied to the vesting of 2023 performance stock units and restricted stock units, rather than open-market sales. Following these transactions, he directly owned 539,292.483 shares, which include RSUs credited through dividend equivalents and shares acquired through the NiSource Employee Stock Purchase Plan.