# EDGAR Filing Document

**Accession Number:** 0001111711
**File Stem:** 0001111711-26-000045
**Filing Date:** 2026-5
**Character Count:** 227842
**Document Hash:** 46c88dc1834ba15a7a75522a33cbdc8e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001111711-26-000045.hdr.sgml**: 20260506

**ACCESSION NUMBER**: 0001111711-26-000045

**CONFORMED SUBMISSION TYPE**: 10-Q

**PUBLIC DOCUMENT COUNT**: 87

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260506

**DATE AS OF CHANGE**: 20260506

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NISOURCE INC.
- **CENTRAL INDEX KEY:** 0001111711
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC & OTHER SERVICES COMBINED [4931]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 352108964
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 10-Q
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-16189
- **FILM NUMBER:** 26945707

**BUSINESS ADDRESS:**
- **STREET 1:** 801 EAST 86TH AVE
- **CITY:** MERRILLVILLE
- **STATE:** IN
- **ZIP:** 46410-6272
- **BUSINESS PHONE:** 2196475200

**MAIL ADDRESS:**
- **STREET 1:** 801 EAST 86TH AVE
- **CITY:** MERRILLVILLE
- **STATE:** IN
- **ZIP:** 46410-6272

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NISOURCE INC/DE
- **DATE OF NAME CHANGE:** 20001103

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NEW NISOURCE INC
- **DATE OF NAME CHANGE:** 20000412

?xml version='1.0' encoding='ASCII'? nix-20260331

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 10-Q** 

☑ **QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)**

**OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the quarterly period ended March 31, 2026** 

**or**

**☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)**

**OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the transition period from <u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u> to <u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u>**

Commission file number <u>001-16189</u> 

**<u>NiSource Inc.</u>**

(Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| DE | DE | 35-2108964 |
| (State or other jurisdiction of<br>incorporation or organization) | (State or other jurisdiction of<br>incorporation or organization) | (I.R.S. Employer<br>Identification No.) |
| 801 East 86th Avenue | 801 East 86th Avenue | |
| Merrillville, | IN | 46410 |
| (Address of principal executive offices) | (Address of principal executive offices) | (Zip Code) |

---

<u>(614) 460-6000</u> 

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of Each Class** | **Trading <br>Symbol(s)** | **Name of Each Exchange on Which Registered** |
| Common Stock, par value $0.01 per share | NI | NYSE |

---

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes 🗹&nbsp;&nbsp;&nbsp;&nbsp;No ◻

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files.)

Yes 🗹&nbsp;&nbsp;&nbsp;&nbsp;No ◻

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer 🗹&nbsp;&nbsp;&nbsp;&nbsp; Accelerated filer ◻&nbsp;&nbsp;&nbsp;&nbsp; Emerging growth company ☐&nbsp;&nbsp;&nbsp;&nbsp; Non-accelerated filer ◻&nbsp;&nbsp;&nbsp;&nbsp;Smaller reporting company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ☐&nbsp;&nbsp;&nbsp;&nbsp;No ☑

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date: Common Stock, $0.01 Par Value: 479,439,245 shares outstanding at April 29, 2026.

------

**NISOURCE INC.**

**FORM 10-Q QUARTERLY REPORT**

**FOR THE QUARTER ENDED MARCH 31, 2026** 

**Table of Contents** 

---

| | | | |
|:---|:---|:---|:---|
| | | | Page |
| | <u>[Defined Terms](#i91125c193fdf4e98980eeb4e396aea15_10)</u> | <u>[Defined Terms](#i91125c193fdf4e98980eeb4e396aea15_10)</u> | <u>[3](#i91125c193fdf4e98980eeb4e396aea15_10)</u> |
| <u>PART I</u> | <u>FINANCIAL INFORMATION</u> | <u>FINANCIAL INFORMATION</u> |  |
|  | Item 1. | Financial Statements - unaudited |  |
|  |  | <u>[Condensed Statements of Consolidated Income (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_22)</u> | <u>[9](#i91125c193fdf4e98980eeb4e396aea15_22)</u> |
|  |  | <u>[Condensed Statements of Consolidated Comprehensive Income (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_25)</u> | <u>[10](#i91125c193fdf4e98980eeb4e396aea15_25)</u> |
|  |  | <u>[Condensed Consolidated Balance Sheets (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_28)</u> | <u>[11](#i91125c193fdf4e98980eeb4e396aea15_28)</u> |
|  |  | <u>[Condensed Statements of Consolidated Cash Flows (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_31)</u> | <u>[13](#i91125c193fdf4e98980eeb4e396aea15_31)</u> |
|  |  | <u>[Condensed Statements of Consolidated Equity (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_34)</u> | <u>[14](#i91125c193fdf4e98980eeb4e396aea15_34)</u> |
|  |  | <u>[Notes to Condensed Consolidated Financial Statements (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_40)</u> | <u>[16](#i91125c193fdf4e98980eeb4e396aea15_40)</u> |
|  | Item 2. | <u>[Management's Discussion and Analysis of Financial Condition and Results of Operations](#i91125c193fdf4e98980eeb4e396aea15_118)</u> | <u>[36](#i91125c193fdf4e98980eeb4e396aea15_118)</u> |
|  | Item 3. | <u>[Quantitative and Qualitative Disclosures About Market Risk](#i91125c193fdf4e98980eeb4e396aea15_169)</u> | <u>[58](#i91125c193fdf4e98980eeb4e396aea15_169)</u> |
|  | Item 4. | <u>[Controls and Procedures](#i91125c193fdf4e98980eeb4e396aea15_172)</u> | <u>[58](#i91125c193fdf4e98980eeb4e396aea15_172)</u> |
| <u>PART II</u> | <u>OTHER INFORMATION</u> | <u>OTHER INFORMATION</u> |  |
|  | Item 1. | <u>[Legal Proceedings](#i91125c193fdf4e98980eeb4e396aea15_178)</u> | <u>[59](#i91125c193fdf4e98980eeb4e396aea15_178)</u> |
|  | Item 1A. | <u>[Risk Factors](#i91125c193fdf4e98980eeb4e396aea15_181)</u> | <u>[59](#i91125c193fdf4e98980eeb4e396aea15_181)</u> |
|  | Item 2. | <u>[Unregistered Sales of Equity Securities and Use of Proceeds](#i91125c193fdf4e98980eeb4e396aea15_184)</u> | <u>[59](#i91125c193fdf4e98980eeb4e396aea15_184)</u> |
|  | Item 3. | <u>[Defaults Upon Senior Securities](#i91125c193fdf4e98980eeb4e396aea15_187)</u> | <u>[59](#i91125c193fdf4e98980eeb4e396aea15_187)</u> |
|  | Item 4. | <u>[Mine Safety Disclosures](#i91125c193fdf4e98980eeb4e396aea15_190)</u> | <u>[59](#i91125c193fdf4e98980eeb4e396aea15_190)</u> |
|  | Item 5. | <u>[Other Information](#i91125c193fdf4e98980eeb4e396aea15_193)</u> | <u>[59](#i91125c193fdf4e98980eeb4e396aea15_193)</u> |
|  | Item 6. | <u>[Exhibits](#i91125c193fdf4e98980eeb4e396aea15_202)</u> | <u>[60](#i91125c193fdf4e98980eeb4e396aea15_202)</u> |
|  | <u>[Signature](#i91125c193fdf4e98980eeb4e396aea15_205)</u> | <u>[Signature](#i91125c193fdf4e98980eeb4e396aea15_205)</u> | <u>[61](#i91125c193fdf4e98980eeb4e396aea15_205)</u> |

---

------

---

| | |
|:---|:---|
| **<u>DEFINED TERMS</u>** | **<u>DEFINED TERMS</u>** |
| The following is a list of frequently used abbreviations or acronyms that are found in this report: | The following is a list of frequently used abbreviations or acronyms that are found in this report: |
| **<u>NiSource Subsidiaries and Affiliates (not exhaustive)</u>** | **<u>NiSource Subsidiaries and Affiliates (not exhaustive)</u>** |
| Columbia of Kentucky | Columbia Gas of Kentucky, Inc. |
| Columbia of Maryland | Columbia Gas of Maryland, Inc. |
| Columbia of Ohio | Columbia Gas of Ohio, Inc. |
| Columbia of Pennsylvania | Columbia Gas of Pennsylvania, Inc. |
| Columbia of Virginia | Columbia Gas of Virginia, Inc. |
| GenCo | NIPSCO Generation LLC |
| Generation Holdings I | Generation Holdings I LLC |
| Generation Holdings II | Generation Holdings II LLC |
| NIPSCO | Northern Indiana Public Service Company LLC |
| NIPSCO Holdings I | NIPSCO Holdings I LLC |
| NIPSCO Holdings II | NIPSCO Holdings II LLC |
| NiSource ("we," "us" or "our") | NiSource Inc. |
| Rosewater | Rosewater Wind Generation LLC and its wholly owned subsidiary, Rosewater Wind Farm LLC |
| Indiana Crossroads Solar | Indiana Crossroads Solar Generation LLC and its wholly owned subsidiary, Meadow Lake Solar Park LLC |
| Indiana Crossroads Wind | Indiana Crossroads Wind Generation LLC and its wholly owned subsidiary, Indiana Crossroads Wind Farm LLC |
| Dunn's Bridge I | Dunn's Bridge I Solar Generation LLC and its wholly owned subsidiary, Dunn's Bridge Solar Center, LLC |
| **<u>Abbreviations and Other</u>** | |
| ADS | Amazon Data Services, Inc, |
| ADS Contract | NIPSCO agreement to provide electricity to ADS' data centers |
| AFUDC | Allowance for funds used during construction |
| Alphabet | Alphabet, Inc. |
| Alphabet Contract | NIPSCO agreement to provide electricity to Alphabet's data centers |
| AOCI | Accumulated other comprehensive income (loss) |
| ASC | Accounting standards codification |
| ASU | Accounting standards update |
| ATM | At-the-market |
| BESS | Battery energy storage system  |
| BIP Orion Holdco L.P. | BIP Orion Holdco L.P., a Delaware limited liability company and also an affiliate of Blackstone |
| BIP Orion Holdco II L.P. | BIP Orion Holdco II L.P., a Delaware limited liability company and also an affiliate of Blackstone |
| Blackstone | Blackstone Infrastructure Partners L.P. |
| Blackstone Investor | BIP Orion Holdco L.P. and BIP Orion Holdco II L.P. affiliates of Blackstone (GenCo Minority Interest Transaction) and Blackstone Infrastructure Partners, affiliates of Blackstone (NIPSCO Minority Interest Transaction) |
| BTA | Build-transfer agreement |
| CCGT | Combined cycle gas turbine |
| CCRs | Coal combustion residuals |
| CEO | Chief executive officer |

---

------

---

| | |
|:---|:---|
| **<u>DEFINED TERMS</u>** | **<u>DEFINED TERMS</u>** |
| CEP | Ohio capital expenditure program |
| CERCLA | Comprehensive Environmental Response Compensation and Liability Act (also known as Superfund) |
| CODM | Chief operating decision maker |
| Columbia Operations | Reportable segment comprised of the results of NiSource Gas Distribution company, including all of its Columbia Gas distribution companies and related subsidiaries |
| Contract Assets | Generation assets and related transmission infrastructure to be developed in connection with the ADS Contract |
| DSM | Demand side management |
| Dunn's Bridge II | Dunn's Bridge II Solar Generation LLC |
| EPA | United States Environmental Protection Agency |
| EPC | Engineering, procurement, and construction |
| EPC Contracts | Engineering, procurement, and construction contracts |
| EPS | Earnings per share |
| ESA | Energy storage agreement |
| FAC | Fuel adjustment clause |
| FASB | Financial Accounting Standards Board |
| FERC | Federal Energy Regulatory Commission |
| FMCA | Indiana federally mandated cost adjustment mechanism |
| GAAP | Generally Accepted Accounting Principles |
| GCA | Gas cost adjustment |
| GCT | Generation cost tracker |
| GenCo Minority Interest Transaction | A transaction between NiSource, Generation Holdings II (sole owner of GenCo) and Blackstone Investor entered into in October 2025, that offered equity interests in Generation Holdings II in exchange for capital contributions by the parties. |
| Generation Assets | Power generations facilities and battery storage to be developed in connection with the ADS Contract |
| Generation Holdings II LLC Agreement | Amended And Restated Limited Liability Company Agreement of Generation Holdings II |
| GHG | Greenhouse gases |
| GWh | Gigawatt hours |
| IRP | Ohio infrastructure replacement program |
| IURC | Indiana Utility Regulatory Commission |
| JV | Joint venture |
| MGP | Manufactured gas plant |
| MISO | Midcontinent Independent System Operator |
| MMDth | Million dekatherms |
| MW | Megawatts |
| MWh | Megawatt hours |
| NIPSCO Electric | The electric generation, transmission and distribution activities of the NIPSCO Operations reportable segment |
| NIPSCO Gas | The gas distribution activities of the NIPSCO Operations reportable segment |
| NIPSCO Holdings II LLC Agreement | Third Amended And Restated Limited Liability Company Agreement of NIPSCO Holdings II |

---

------

---

| | |
|:---|:---|
| **<u>DEFINED TERMS</u>** | **<u>DEFINED TERMS</u>** |
| NIPSCO Minority Interest Transaction | A transaction between NiSource, NIPSCO Holdings II (sole owner of NIPSCO) and an affiliate of Blackstone pursuant to a purchase and sale agreement entered into on June 17, 2023, that offered equity interests in NIPSCO Holdings II in exchange for capital contributions by the parties. |
| NIPSCO Operations | Reportable segment comprised of the results of NIPSCO Holdings I, NIPSCO Holdings II, and NIPSCO and all related subsidiaries |
| NYMEX | New York Mercantile Exchange |
| OPEB | Other postemployment benefits |
| PHMSA | Pipeline and Hazardous Materials Safety Administration |
| Pool Resource Assets | Portfolio of electric generation assets and related assets owned or contracted for by NIPSCO and/or its affiliates (primarily including GenCo) and designed to serve the needs of data center customers. |
| PPA | Power purchase agreement |
| ROE | Return on equity |
| SAVE | Steps to advance Virginia's energy plan |
| Scope 1 GHG Emissions | Direct emissions from sources owned or controlled by us (e.g., emissions from our combustion of fuel, vehicles, and process emissions and fugitive emissions) |
| Scope 2 GHG Emissions | Indirect emissions from sources owned or controlled by us |
| SEC | Securities and Exchange Commission |
| SMRP | Kentucky safety modification and replacement program |
| SMS | Safety management system |
| TCJA | An Act to provide for reconciliation pursuant to titles II and V of the concurrent resolution on the budget for fiscal year 2018 (commonly known as the Tax Cuts and Jobs Act of 2017) |
| TDSIC | Indiana transmission, distribution and storage system improvement charge |
| Templeton | Templeton Wind Energy LLC |
| VIE | Variable interest entity |
| 2018 Plan | 2018 integrated resource plan |
| 2021 Plan | 2021 integrated resource plan |
| 2024 Plan | 2024 integrated resource plan |

---

***Note regarding forward-looking statements***

This Quarterly Report on Form 10-Q contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). These forward-looking statements include, but are not limited to, statements concerning our plans, strategies, objectives, expected performance, planned expenditures, recovery of expenditures through rates, stated on either a consolidated or segment basis, and any and all underlying assumptions and other statements that are not statements of historical fact. Expressions of future goals and expectations and similar expressions reflecting something other than historical fact, including "may," "will," "should," "could," "would," "aims," "seeks," "expects," "plans," "anticipates," "intends," "believes," "estimates," "predicts," "potential," "targets," "forecast," and "continue," are intended to identify forward-looking statements. All forward-looking statements are based on assumptions that management believes to be reasonable; however, there can be no assurance that actual results will not differ materially. Investors and prospective investors should understand that many factors impact whether any forward-looking statement contained herein will, or can be, realized. Any one of those factors could cause actual results to differ materially from those projected.

Factors that could cause actual results to differ materially from those projected in any forward-looking statement discussed in this Quarterly Report on Form 10-Q include, among other things:

------

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to execute our business plan or growth strategy, including utility infrastructure investments, or business opportunities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to manage data center growth in our service territories;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• potential incidents and other operating risks associated with our business;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to work successfully with our JV partners;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to construct, develop and place into service the Contract Assets, Pool Resource Assets and any other generation or transmission assets we develop to support future data center contracts on time or at all and consistent with initial cost estimates, as well as the performance of such assets once constructed and placed into service;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to obtain the significant additional financing required to construct the Contract Assets and any other generation or transmission assets we develop to support future data center contracts on favorable terms, if at all;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to recover our investments and realize our expected return under the ADS Contract and any future data center contracts that we enter into;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to maintain our investment grade credit ratings as we finance and pursue our data center strategy, including our performance under the ADS Contract and any future data center contracts that we enter into;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• ADS performance under the ADS Contract and the performance of our customers under any future data center contracts;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any decisions by ADS to terminate or reduce the committed capacity under the ADS Contract or any decision by any customer under any future data center contract to terminate or reduce the committed capacity under the contract;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• potential changes in the MISO accreditation treatment of capacity resources;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to adapt to, and manage costs related to, advances in technology, including alternative energy sources and changes in related laws and regulations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our increased dependency on technology;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• impacts related to our aging infrastructure;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to obtain sufficient insurance coverage and whether such coverage will protect us against significant losses;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the success of our electric generation strategy;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• construction risks and supply risks;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• fluctuations in demand from residential and commercial customers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• fluctuations in the price of energy commodities and related transportation costs or an inability to obtain an adequate, reliable and cost-effective fuel supply to meet customer demand;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to attract, retain or re-skill a qualified workforce and maintain good labor relations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to manage new initiatives and organizational changes;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the performance and quality of third-party suppliers and service providers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to manage the financial and operational risks related to achieving our carbon emission reduction goals, including our Net Zero Goal (as defined below), including any future associated impact from business opportunities such as data center development as those opportunities evolve;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• regulation and the impact of regulatory rate reviews;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to obtain expected financial or regulatory outcomes;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• potential cybersecurity attacks or security breaches;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• increased requirements and costs related to cybersecurity;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any damage to our reputation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the impacts of natural disasters, acts of terrorism, acts of war or other catastrophic events;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the physical impacts of climate change and the transition to a lower carbon future;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our debt obligations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any changes to our credit ratings or the credit ratings of certain of our subsidiaries;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• adverse economic and capital market conditions, including increases in inflation or interest rates, recession, or changes in investor sentiment;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the actions of activist stockholders;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• economic conditions in certain industries;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the ability of customers and suppliers to fulfill their payment and contractual obligations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the ability of our subsidiaries to generate cash;

------

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• pension funding obligations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• potential impairments of goodwill;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the outcome of legal and regulatory proceedings, investigations, incidents, claims and litigation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• compliance with changes in, or new interpretations of applicable laws, regulations and tariffs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the cost of compliance with environmental laws and regulations and the costs of associated liabilities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• changes in tax laws or the interpretation thereof; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• other matters set forth in Part I, Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations," and Part II, Item 1A, "Risk Factors," of this report, and Part I, Item 1, "Business," Part I, Item 1A, "Risk Factors," and Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations," of our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, some of which risks are beyond our control.

In addition, the relative contributions to profitability by each business segment, and the assumptions underlying the forward-looking statements relating thereto, may change over time.

All forward-looking statements are expressly qualified in their entirety by the foregoing cautionary statements. We undertake no obligation to, and expressly disclaim any such obligation to, update or revise any forward-looking statement to reflect changed assumptions, the occurrence of anticipated or unanticipated events or changes to expected results over time or otherwise, except as required by law.

------

---

| | |
|:---|:---|
| **Index** | **Page** |
| <u>[Condensed Statements of Consolidated Income (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_22)</u> | <u>[9](#i91125c193fdf4e98980eeb4e396aea15_22)</u> |
| <u>[Condensed Statements of Consolidated Comprehensive Income (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_25)</u> | <u>[10](#i91125c193fdf4e98980eeb4e396aea15_25)</u> |
| <u>[Condensed Consolidated Balance Sheets (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_28)</u> | <u>[11](#i91125c193fdf4e98980eeb4e396aea15_28)</u> |
| <u>[Condensed Statements of Consolidated Cash Flows (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_31)</u> | <u>[13](#i91125c193fdf4e98980eeb4e396aea15_31)</u> |
| <u>[Condensed Statements of Consolidated Equity (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_34)</u> | <u>[14](#i91125c193fdf4e98980eeb4e396aea15_34)</u> |
| <u>[Notes to Condensed Consolidated Financial Statements (unaudited)](#i91125c193fdf4e98980eeb4e396aea15_40)</u> | <u>[16](#i91125c193fdf4e98980eeb4e396aea15_40)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;1. <u>[Basis of Accounting Presentation](#i91125c193fdf4e98980eeb4e396aea15_40)</u> | <u>[16](#i91125c193fdf4e98980eeb4e396aea15_40)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;2. <u>[Recent Accounting Pronouncements](#i91125c193fdf4e98980eeb4e396aea15_43)</u> | <u>[16](#i91125c193fdf4e98980eeb4e396aea15_43)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;3. <u>[Revenue Recognition](#i91125c193fdf4e98980eeb4e396aea15_46)</u> | <u>[16](#i91125c193fdf4e98980eeb4e396aea15_46)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;4. <u>[Noncontrolling Interests](#i91125c193fdf4e98980eeb4e396aea15_49)</u> | <u>[19](#i91125c193fdf4e98980eeb4e396aea15_49)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;5. <u>[Earnings Per Share](#i91125c193fdf4e98980eeb4e396aea15_52)</u> | <u>[21](#i91125c193fdf4e98980eeb4e396aea15_52)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;6. <u>[Equity](#i91125c193fdf4e98980eeb4e396aea15_55)</u> | <u>[22](#i91125c193fdf4e98980eeb4e396aea15_55)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;7. <u>[Short-Term Borrowings](#i91125c193fdf4e98980eeb4e396aea15_58)</u> | <u>[22](#i91125c193fdf4e98980eeb4e396aea15_58)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;8. <u>[Regulatory Matters](#i91125c193fdf4e98980eeb4e396aea15_73)</u> | <u>[23](#i91125c193fdf4e98980eeb4e396aea15_73)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;9. <u>[Risk Management Activities](#i91125c193fdf4e98980eeb4e396aea15_76)</u> | <u>[24](#i91125c193fdf4e98980eeb4e396aea15_76)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;10. <u>[Fair Value](#i91125c193fdf4e98980eeb4e396aea15_79)</u> | <u>[26](#i91125c193fdf4e98980eeb4e396aea15_79)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;11. <u>[Income Taxes](#i91125c193fdf4e98980eeb4e396aea15_85)</u> | <u>[29](#i91125c193fdf4e98980eeb4e396aea15_85)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;12. <u>[Pension and Other Postemployment Benefits](#i91125c193fdf4e98980eeb4e396aea15_88)</u> | <u>[29](#i91125c193fdf4e98980eeb4e396aea15_88)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;13. <u>[Other Commitments and Contingencies](#i91125c193fdf4e98980eeb4e396aea15_91)</u> | <u>[30](#i91125c193fdf4e98980eeb4e396aea15_91)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;14. <u>[Accumulated Other Comprehensive Loss](#i91125c193fdf4e98980eeb4e396aea15_103)</u> | <u>[32](#i91125c193fdf4e98980eeb4e396aea15_103)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;15. <u>[Business Segment Information](#i91125c193fdf4e98980eeb4e396aea15_106)</u> | <u>[32](#i91125c193fdf4e98980eeb4e396aea15_106)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;16. <u>[Other, Net](#i91125c193fdf4e98980eeb4e396aea15_109)</u> | <u>[34](#i91125c193fdf4e98980eeb4e396aea15_109)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;17. <u>[Supplemental Disclosures of Cash Flow Information](#i91125c193fdf4e98980eeb4e396aea15_112)</u> | <u>[35](#i91125c193fdf4e98980eeb4e396aea15_112)</u> |

---

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

**<u>PART I</u>**

<u>ITEM 1. FINANCIAL STATEMENTS</u>

**NiSource Inc.**

**Condensed Statements of Consolidated Income (unaudited)**

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
| <br>*(in millions, except per share amounts)* | **2026** | 2025 |
| **Operating Revenues** | **Operating Revenues** |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Customer revenues | $**2322.3** | $2149.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other revenues | **40.8** | 33.7 |
| Total Operating Revenues | **2363.1** | 2183.2 |
| **Operating Expenses** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cost of energy | **669.2** | 647.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Operation and maintenance | **489.2** | 427.8 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Depreciation and amortization | **288.3** | 258.6 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Loss on impairment of assets | **—** | 0.3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other taxes | **97.2** | 89.6 |
| Total Operating Expenses | **1543.9** | 1423.8 |
| **Operating Income** | **819.2** | 759.4 |
| **Other Income (Deductions)** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Interest expense, net | **(191.6)** | (132.8) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other, net | **14.4** | 5.8 |
| Total Other Deductions, Net | **(177.2)** | (127.0) |
| **Income before Income Taxes** | **642.0** | 632.4 |
| **Income Taxes** | **85.8** | 105.7 |
| **Net Income** | **556.2** | 526.7 |
| Net income attributable to noncontrolling interest | **49.1** | 51.9 |
| **Net Income Attributable to NiSource** | **507.1** | 474.8 |
| Preferred dividends redemption premium | **3.6** |  |
| **Net Income Available to Common Shareholders** | $**510.7** | $474.8 |
| **Earnings Per Share** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Basic Earnings Per Share | $**1.06** | $1.01 |
| &nbsp;&nbsp;&nbsp;&nbsp;Diluted Earnings Per Share | $**1.06** | $1.00 |
| **Basic Average Common Shares Outstanding** | **479.0** | 470.4 |
| **Diluted Average Common Shares** | **480.9** | 472.5 |

---

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Condensed Statements of Consolidated Comprehensive Income (unaudited)**

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
|<br>*(in millions, net of taxes)* | **2026** | 2025 |
| Net Income | $**556.2** | $526.7 |
| &nbsp;&nbsp;Other comprehensive (loss) income: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net unrealized (loss) gain on available-for-sale debt securities<sup>(1)</sup> | **(1.2)** | 0.8 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reclassification adjustment for cash flow hedges | **(0.1)** | (0.1) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unrecognized pension and OPEB benefit (costs)<sup>(2)</sup> | **(1.7)** | 0.5 |
| &nbsp;&nbsp;Total other comprehensive (loss) income | **(3.0)** | 1.2 |
| **Comprehensive Income** | $**553.2** | $527.9 |

---

<sup>(1)</sup> Net unrealized (loss) gain on available-for-sale debt securities, net of $0.3 million tax benefit and $0.2 million tax expense in the first quarter of 2026 and 2025, respectively.

<sup>(2)</sup> Unrecognized pension and OPEB benefit (cost), net of $1.5 million tax expense and $0.1 million tax expense in the first quarter of 2026 and 2025, respectively.

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Condensed Consolidated Balance Sheets (unaudited)**

---

| | | |
|:---|:---|:---|
| *(in millions)* | **March 31,<br>2026** | December 31,<br>2025 |
| **ASSETS** |  |  |
| **Property, Plant and Equipment** |  |  |
| &nbsp;&nbsp;&nbsp;Plant | $**39043.9** | $38058.8 |
| &nbsp;&nbsp;&nbsp;Accumulated depreciation and amortization | **(9616.5)** | (9370.6) |
| Net Property, Plant and Equipment<sup>(1)</sup> | **29427.4** | 28688.2 |
| **Investments and Other Assets** |  |  |
| &nbsp;&nbsp;&nbsp;Unconsolidated affiliates | **8.2** | 8.1 |
| Available-for-sale debt securities (amortized cost of $157.8 and $145.8) | **156.7** | 146.1 |
| &nbsp;&nbsp;&nbsp;Other investments | **116.3** | 118.6 |
| Total Investments and Other Assets | **281.2** | 272.8 |
| **Current Assets** |  |  |
| &nbsp;&nbsp;&nbsp;Cash and cash equivalents | **71.9** | 110.1 |
| &nbsp;&nbsp;&nbsp;Restricted cash | **25.2** | 25.6 |
| &nbsp;&nbsp;&nbsp;Accounts receivable | **1281.2** | 1238.1 |
| &nbsp;&nbsp;&nbsp;&nbsp;Allowance for credit losses | **(46.1)** | (40.6) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts receivable, net | **1235.1** | 1197.5 |
| &nbsp;&nbsp;&nbsp;Gas storage | **88.4** | 252.0 |
| &nbsp;&nbsp;&nbsp;Materials and supplies, at average cost | **193.8** | 189.0 |
| &nbsp;&nbsp;&nbsp;Electric production fuel, at average cost | **21.3** | 8.5 |
| &nbsp;&nbsp;&nbsp;Exchange gas receivable | **69.6** | 66.0 |
| &nbsp;&nbsp;&nbsp;Regulatory assets | **380.6** | 274.2 |
| &nbsp;&nbsp;Income tax receivable | **11.5** | 15.7 |
| &nbsp;&nbsp;&nbsp;Prepayments | **209.1** | 149.3 |
| &nbsp;&nbsp;&nbsp;Other current assets | **102.5** | 89.3 |
| Total Current Assets<sup>(1)</sup> | **2409.0** | 2377.2 |
| **Other Assets** |  |  |
| &nbsp;&nbsp;&nbsp;Regulatory assets | **2301.9** | 2225.2 |
| &nbsp;&nbsp;&nbsp;Goodwill | **1485.9** | 1485.9 |
| &nbsp;&nbsp;Deferred charges and other<sup>(2)</sup> | **695.6** | 809.4 |
| Total Other Assets | **4483.4** | 4520.5 |
| **Total Assets** | $**36601.0** | $35858.7 |

---

<sup>(1)</sup> Includes $1,506.4 million and $1,312.7 million at March 31, 2026 and December 31, 2025, respectively, of net property, plant and equipment assets and $110.1 million and $90.1 million at March 31, 2026 and December 31, 2025, respectively, of current assets of consolidated VIEs that may be used only to settle obligations of the consolidated VIEs. Refer to Note 4, "Noncontrolling Interests," for additional information.

<sup>(2)</sup> Includes $199.0 million and $305.4 million at March 31, 2026 and December 31, 2025, respectively, of advanced deposits of project costs of consolidated VIEs that may be used only to settle obligations of the consolidated VIEs. Refer to Note 4, "Noncontrolling Interests," for additional information.

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Condensed Consolidated Balance Sheets (unaudited) (continued)**

---

| | | |
|:---|:---|:---|
| *(in millions, except share amounts)* | **March 31,<br>2026** | December 31,<br>2025 |
| **CAPITALIZATION AND LIABILITIES** |  |  |
| **Capitalization** |  |  |
| Stockholders' Equity |  |  |
| Common stock - $0.01 par value,750,000,000 shares authorized; 479,364,801 and 478,432,058 shares outstanding, respectively | $**4.8** | $4.8 |
| &nbsp;&nbsp;&nbsp;Treasury stock | **(99.9)** | (99.9) |
| &nbsp;&nbsp;&nbsp;Additional paid-in capital | **9859.1** | 9866.6 |
| &nbsp;&nbsp;&nbsp;Retained deficit | **(96.6)** | (315.2) |
| &nbsp;&nbsp;&nbsp;Accumulated other comprehensive loss | **(9.2)** | (6.2) |
| Total NiSource Stockholders' Equity | **9658.2** | 9450.1 |
| Noncontrolling interest in consolidated subsidiaries | **2269.3** | 2209.8 |
| Total Stockholders' Equity | **11927.5** | 11659.9 |
| Long-term debt, excluding amounts due within one year | **15458.9** | 15457.8 |
| Total Capitalization | **27386.4** | 27117.7 |
| **Current Liabilities** |  |  |
| &nbsp;&nbsp;&nbsp;Current portion of long-term debt | **16.8** | 19.7 |
| &nbsp;&nbsp;&nbsp;Short-term borrowings | **1291.0** | 736.0 |
| &nbsp;&nbsp;&nbsp;Accounts payable | **999.3** | 1124.5 |
| &nbsp;&nbsp;&nbsp;Dividends payable - common stock | **147.4** | 4.4 |
| &nbsp;&nbsp;&nbsp;Customer deposits and credits | **148.1** | 283.4 |
| &nbsp;&nbsp;&nbsp;Taxes accrued | **240.8** | 228.8 |
| &nbsp;&nbsp;&nbsp;Interest accrued | **218.8** | 206.2 |
| &nbsp;&nbsp;Asset retirement obligations | **49.9** | 55.0 |
| &nbsp;&nbsp;Exchange gas payable | **56.5** | 125.4 |
| &nbsp;&nbsp;Regulatory liabilities | **204.3** | 260.1 |
| &nbsp;&nbsp;&nbsp;Accrued compensation and employee benefits | **153.5** | 246.8 |
| &nbsp;&nbsp;&nbsp;Other accruals | **200.4** | 167.1 |
| Total Current Liabilities<sup>(1)</sup> | **3726.8** | 3457.4 |
| **Other Liabilities** |  |  |
| &nbsp;&nbsp;&nbsp;Deferred income taxes | **2588.2** | 2500.1 |
| &nbsp;&nbsp;Deferred credits | **79.6** | 77.2 |
| &nbsp;&nbsp;&nbsp;Accrued liability for postretirement and postemployment benefits | **157.9** | 153.1 |
| &nbsp;&nbsp;&nbsp;Regulatory liabilities | **1579.1** | 1513.3 |
| &nbsp;&nbsp;&nbsp;Asset retirement obligations | **793.4** | 781.9 |
| &nbsp;&nbsp;Other noncurrent liabilities | **289.6** | 258.0 |
| Total Other Liabilities<sup>(1)</sup> | **5487.8** | 5283.6 |
| **Commitments and Contingencies (Refer to Note 13, "Other Commitments and Contingencies")** |  |  |
| **Total Capitalization and Liabilities** | $**36601.0** | $35858.7 |

---

<sup>(1)</sup> Includes $134.1 million and $56.9 million at March 31, 2026 and December 31, 2025, respectively, of current liabilities and $56.3 million and $55.7 million at March 31, 2026 and December 31, 2025, respectively, of other liabilities, and finance leases of $40.1 million at March 31, 2026 and December 31, 2025, respectively, of consolidated VIEs that creditors do not have recourse to our general credit. Refer to Note 4, "Noncontrolling Interests," for additional information.

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Condensed Statements of Consolidated Cash Flows (unaudited)**

---

| | | |
|:---|:---|:---|
| Three Months Ended March 31, *(in millions)* | **2026** | 2025 |
| **Operating Activities** |  |  |
| &nbsp;&nbsp;&nbsp;Net Income | $**556.2** | $526.7 |
| &nbsp;&nbsp;Adjustments to Reconcile Net Income to Net Cash from Operating Activities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Depreciation and amortization | **288.3** | 258.6 |
| &nbsp;&nbsp;&nbsp;&nbsp;Deferred income taxes and investment tax credits | **75.8** | 91.3 |
| &nbsp;&nbsp;&nbsp;&nbsp;Payments for asset retirement obligations | **(15.5)** | (10.4) |
| &nbsp;&nbsp;&nbsp;&nbsp;Other adjustments | **18.3** | 7.1 |
| &nbsp;&nbsp;&nbsp;Changes in Assets and Liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Components of working capital<sup>(1)</sup> | **(531.5)** | (205.3) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Regulatory assets/liabilities | **50.5** | 10.3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other noncurrent liabilities and deferred credits and charges | **0.2** | 8.1 |
| &nbsp;&nbsp;&nbsp;**Net Cash Flows from Operating Activities** | **442.3** | 686.4 |
| **Investing Activities** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Capital expenditures | **(805.2)** | (637.3) |
| &nbsp;&nbsp;&nbsp;&nbsp;Milestone payments to renewable generation asset developers | **—** | (554.2) |
| &nbsp;&nbsp;&nbsp;&nbsp;Advanced deposits | **(22.4)** | (125.3) |
| &nbsp;&nbsp;&nbsp;&nbsp;Other investing activities | **(45.0)** | (35.9) |
| &nbsp;&nbsp;&nbsp;**Net Cash Flows used for Investing Activities** | **(872.6)** | (1352.7) |
| **Financing Activities** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Proceeds from issuance of long-term debt | **—** | 741.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;Repayments of finance lease obligations | **(5.9)** | (5.5) |
| &nbsp;&nbsp;&nbsp;&nbsp;Net change in commercial paper and other short-term borrowings | **555.0** | 166.4 |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock, net of issuance costs | **3.9** | 3.2 |
| &nbsp;&nbsp;&nbsp;&nbsp;Equity costs, premiums and other debt related costs | **(22.7)** | (15.4) |
| &nbsp;&nbsp;&nbsp;&nbsp;Contributions from NIPSCO and GenCo minority interest holders | **33.5** | 34.8 |
| &nbsp;&nbsp;&nbsp;&nbsp;Distribution to NIPSCO minority interest holders | **(19.9)** | (17.5) |
| &nbsp;&nbsp;&nbsp;&nbsp;Distributions to tax equity partners  | **(3.2)** | (4.1) |
| &nbsp;&nbsp;&nbsp;&nbsp;Dividends paid - common stock | **(149.0)** | (132.0) |
| &nbsp;&nbsp;&nbsp;**Net Cash Flows from Financing Activities** | **391.7** | 771.4 |
| &nbsp;&nbsp;&nbsp;Change in cash, cash equivalents and restricted cash | **(38.6)** | 105.1 |
| &nbsp;&nbsp;&nbsp;Cash, cash equivalents and restricted cash at beginning of period | **135.7** | 198.6 |
| &nbsp;&nbsp;&nbsp;**Cash, Cash Equivalents and Restricted Cash at End of Period** | $**97.1** | $303.7 |
| <sup>(1)</sup> Refer to Note 17, "Supplemental Disclosures of Cash Flow Information," for additional information. | <sup>(1)</sup> Refer to Note 17, "Supplemental Disclosures of Cash Flow Information," for additional information. | <sup>(1)</sup> Refer to Note 17, "Supplemental Disclosures of Cash Flow Information," for additional information. |

---

**Reconciliation to Balance Sheet**

---

| | | |
|:---|:---|:---|
| *(in millions)* | **March 31, 2026** | December 31, 2025 |
| &nbsp;&nbsp;Cash and cash equivalents | **71.9** | 110.1 |
| &nbsp;&nbsp;Restricted cash | **25.2** | 25.6 |
| **Total Cash, Cash Equivalents and Restricted Cash** | **97.1** | 135.7 |

---

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Condensed Statements of Consolidated Equity (unaudited)**

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| *(in millions)* | **Common<br>Stock** | **Treasury<br>Stock** | **Additional<br>Paid-In<br>Capital** | **Retained<br>Deficit** | **Accumulated<br>Other<br>Comprehensive<br>Loss** | **Noncontrolling Interest in Consolidated Subsidiaries** | **Total** |
| **Balance as of December 31, 2025** | $**4.8** | $**(99.9)** | $**9866.6** | $**(315.2)** | $**(6.2)** | $**2209.8** | $**11659.9** |
| Comprehensive Income: |  |  |  |  |  |  |  |
| &nbsp;&nbsp;Net income |  |  |  | 507.1 |  | 49.1 | 556.2 |
| &nbsp;&nbsp;Other comprehensive loss, net of tax |  |  |  |  | (3.0) |  | (3.0) |
| Dividends: |  |  |  |  |  |  |  |
| &nbsp;&nbsp;Common stock ($0.60 per share) |  |  |  | (292.1) |  |  | (292.1) |
| Noncontrolling Interests: |  |  |  |  |  |  |  |
| &nbsp;&nbsp;Contributions from noncontrolling interests |  |  |  |  |  | 33.5 | 33.5 |
| &nbsp;&nbsp;&nbsp;Distributions to noncontrolling interests |  |  |  |  |  | (23.1) | (23.1) |
| Stock issuances (redemptions): |  |  |  |  |  |  |  |
| &nbsp;&nbsp;Series A Preferred stock redemption premium |  |  |  | 3.6 |  |  | 3.6 |
| &nbsp;&nbsp;&nbsp;Employee stock purchase plan |  |  | 1.9 |  |  |  | 1.9 |
| &nbsp;&nbsp;&nbsp;Long-term incentive plan |  |  | (12.0) |  |  |  | (12.0) |
| &nbsp;&nbsp;&nbsp;401(k) and profit sharing |  |  | 2.6 |  |  |  | 2.6 |
| **Balance as of March 31, 2026** | $**4.8** | $**(99.9)** | $**9859.1** | $**(96.6)** | $**(9.2)** | $**2269.3** | $**11927.5** |

---

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| *(in millions)* | **Common<br>Stock** | **Treasury<br>Stock** | **Additional<br>Paid-In<br>Capital** | **Retained<br>Deficit** | **Accumulated<br>Other<br>Comprehensive<br>Loss** | **Noncontrolling Interest in Consolidated Subsidiaries** | **Total** |
| Balance as of December 31, 2024 | $4.7 | $(99.9) | $9521.5 | $(711.7) | $(30.4) | $1984.1 | $10668.3 |
| Comprehensive Income: |  |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Net income |  |  |  | 474.8 |  | 51.9 | 526.7 |
| &nbsp;&nbsp;&nbsp;Other comprehensive income, net of tax |  |  |  |  | 1.2 |  | 1.2 |
| Dividends: |  |  |  |  |  |  |  |
| &nbsp;&nbsp;Common stock ($0.56 per share) |  |  |  | (264.5) |  |  | (264.5) |
| Noncontrolling Interests: |  |  |  |  |  |  |  |
| &nbsp;&nbsp;Contributions from noncontrolling interests |  |  |  |  |  | 34.8 | 34.8 |
| &nbsp;&nbsp;Distributions to noncontrolling interest |  |  |  |  |  | (21.6) | (21.6) |
| Stock issuances (redemptions): |  |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Employee stock purchase plan |  |  | 1.7 |  |  |  | 1.7 |
| &nbsp;&nbsp;&nbsp;Long-term incentive plan |  |  | (3.3) |  |  |  | (3.3) |
| &nbsp;&nbsp;&nbsp;401(k) and profit sharing |  |  | 2.7 |  |  |  | 2.7 |
| Balance as of March 31, 2025 | $4.7 | $(99.9) | $9522.6 | $(501.4) | $(29.2) | $2049.2 | $10946.0 |

---

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Condensed Statements of Consolidated Equity (unaudited) (continued)**

---

| | | | |
|:---|:---|:---|:---|
| | **Common** | **Common** | **Common** |
|<br>**Shares** *(in thousands)* | **Shares** | **Treasury** | **Outstanding** |
| **Balance as of December 31, 2025** | **482395** | **(3963)** | **478432** |
| Issued: |  |  |  |
| &nbsp;&nbsp;&nbsp;Employee stock purchase plan | 45 |  | 45 |
| &nbsp;&nbsp;&nbsp;Long-term incentive plan | 831 |  | 831 |
| &nbsp;&nbsp;&nbsp;401(k) and profit sharing | 57 |  | 57 |
| **Balance as of March 31, 2026** | **483328** | **(3963)** | **479365** |
|  | **Common** | **Common** | **Common** |
| **Shares** *(in thousands)* | **Shares** | **Treasury** | **Outstanding** |
| Balance as of December 31, 2024 | 473785 | (3963) | 469822 |
| Issued: |  |  |  |
| &nbsp;&nbsp;&nbsp;Employee stock purchase plan | 46 |  | 46 |
| &nbsp;&nbsp;&nbsp;Long-term incentive plan | 682 |  | 682 |
| &nbsp;&nbsp;&nbsp;401(k) and profit sharing | 68 |  | 68 |
| Balance as of March 31, 2025 | 474581 | (3963) | 470618 |

---

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

**1.&nbsp;&nbsp;&nbsp;&nbsp;Basis of Accounting Presentation**

Our accompanying Condensed Consolidated Financial Statements (unaudited) reflect all normal recurring adjustments that are necessary, in the opinion of management, to present fairly the results of operations in accordance with GAAP in the United States of America. The accompanying financial statements include the accounts of us, our majority-owned subsidiaries, and VIEs of which we are the primary beneficiary after the elimination of all intercompany accounts and transactions.

The accompanying financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025. Income for interim periods may not be indicative of results for the calendar year due to weather variations and other factors.

The Condensed Consolidated Financial Statements (unaudited) have been prepared pursuant to the rules and regulations of the SEC. Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although we believe that the disclosures made in this Quarterly Report on Form 10-Q are adequate to make the information herein not misleading.

**2.&nbsp;&nbsp;&nbsp;&nbsp;Recent Accounting Pronouncements**

**Recently Issued Accounting Pronouncements**

In September 2025, the FASB issued ASU 2025-06, *Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software*. We are currently evaluating the impacts this amendment will have on our internal-use software capitalization policy. See Note 2 to the Company's Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2025, for a discussion of the impact of this ASU.

In November 2024, the FASB issued ASU 2024-03, *Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40)*. We are currently evaluating the impacts this amendment will have on our required disclosures.See Note 2 to the Company's Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2025, for a discussion of the impact of this ASU.

**3.&nbsp;&nbsp;&nbsp;&nbsp;Revenue Recognition**

***Revenue Disaggregation and Reconciliation.*** We disaggregate revenue from contracts with customers based upon reportable segment, as well as by customer class. The Columbia Operations segment provides regulated natural gas service and transportation for residential, commercial and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky, and Maryland. The NIPSCO Operations segment provides regulated gas and electric service in the northern part of Indiana.

The tables below reconcile revenue disaggregation by customer class to segment revenue, as well as to revenues reflected on the Condensed Statements of Consolidated Income (unaudited):

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Three months ended March 31, 2026** <br>***(in millions)*** | **Columbia Operations** | **NIPSCO Operations** | **Corporate and Other** | **Total** |
| ***Gas Distribution*** | | | | |
| Residential | $909.2 | $318.6 | $— | $1227.8 |
| Commercial | 331.0 | 115.6 |  | 446.6 |
| Industrial | 57.4 | 34.1 |  | 91.5 |
| Off-system | 16.8 |  |  | 16.8 |
| Miscellaneous<sup>(1)</sup> | 14.2 | 3.1 |  | 17.3 |
| &nbsp;&nbsp;**Subtotal** | $**1328.6** | $**471.4** | $**—** | $**1800.0** |
| ***Electric Generation and Power Delivery*** |  |  |  |  |
| Residential | $— | $176.8 | $— | $176.8 |
| Commercial |  | 172.1 |  | 172.1 |
| Industrial |  | 155.5 |  | 155.5 |
| Wholesale |  | 8.5 |  | 8.5 |
| Public Authority |  | 4.3 |  | 4.3 |
| Miscellaneous<sup>(1)</sup> |  | 5.1 |  | 5.1 |
| &nbsp;&nbsp;**Subtotal** | $**—** | $**522.3** | $**—** | $**522.3** |
| **Total Customer Revenues**<sup>(2)</sup> | 1328.6 | 993.7 |  | 2322.3 |
| **Other Revenues**<sup>(3)</sup> | (5.4) | 44.8 | 1.4 | 40.8 |
| **Total Operating Revenues** | $**1323.2** | $**1038.5** | $**1.4** | $**2363.1** |
| <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms, late fees, and wholesale revenues. Amounts included in NIPSCO Operations primarily relate to late fees and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue.  | <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms, late fees, and wholesale revenues. Amounts included in NIPSCO Operations primarily relate to late fees and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue.  | <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms, late fees, and wholesale revenues. Amounts included in NIPSCO Operations primarily relate to late fees and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue.  | <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms, late fees, and wholesale revenues. Amounts included in NIPSCO Operations primarily relate to late fees and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue.  | <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms, late fees, and wholesale revenues. Amounts included in NIPSCO Operations primarily relate to late fees and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue.  |
| Three months ended March 31, 2025 <br>*(in millions)* | Columbia Operations | NIPSCO Operations | Corporate and Other | Total |
| ***Gas Distribution*** |  |  |  |  |
| Residential | $851.2 | $291.4 | $— | $1142.6 |
| Commercial | 306.5 | 103.1 |  | 409.6 |
| Industrial | 47.9 | 31.4 |  | 79.3 |
| Off-system | 22.3 |  |  | 22.3 |
| Wholesale | 1.1 |  |  | 1.1 |
| Miscellaneous<sup>(1)</sup> | 10.9 | 4.7 |  | 15.6 |
| &nbsp;&nbsp;**Subtotal** | $1239.9 | $430.6 | $— | $1670.5 |
| ***Electric Generation and Power Delivery*** |  |  |  |  |
| Residential | $— | $167.9 | $— | $167.9 |
| Commercial |  | 160.1 |  | 160.1 |
| Industrial |  | 142.6 |  | 142.6 |
| Wholesale |  | 7.6 |  | 7.6 |
| Public Authority |  | 2.2 |  | 2.2 |
| Miscellaneous<sup>(1)</sup> |  | (1.4) |  | (1.4) |
| &nbsp;&nbsp;**Subtotal** | $— | $479.0 | $— | $479.0 |
| **Total Customer Revenues**<sup>(2)</sup> | 1239.9 | 909.6 |  | 2149.5 |
| **Other Revenues**<sup>(3)</sup> | 0.7 | 31.8 | 1.2 | 33.7 |
| **Total Operating Revenues** | $1240.6 | $941.4 | $1.2 | $2183.2 |
| <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms and late fees. Amounts included in NIPSCO Operations, primarily relate to revenue refunds, public repairs and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue. | <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms and late fees. Amounts included in NIPSCO Operations, primarily relate to revenue refunds, public repairs and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue. | <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms and late fees. Amounts included in NIPSCO Operations, primarily relate to revenue refunds, public repairs and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue. | <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms and late fees. Amounts included in NIPSCO Operations, primarily relate to revenue refunds, public repairs and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue. | <sup>(1)</sup>Amounts included in Columbia Operations primarily relate to earnings share mechanisms and late fees. Amounts included in NIPSCO Operations, primarily relate to revenue refunds, public repairs and property rentals. <sup>(2)</sup>Customer revenue amounts exclude intersegment revenues. See Note 15, "Business Segment Information," for discussion of intersegment revenues.<br><sup>(3)</sup>Amounts included in Columbia Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms. Amounts included in NIPSCO Operations primarily relate to alternative revenue programs including weather normalization adjustment mechanisms, MISO multi-value projects and revenue from FERC jurisdictional transmission assets. Amounts included in Corporate and Other primarily relate to products and services revenue. |

---

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

***Customer Accounts Receivable.*** Accounts receivable on our Condensed Consolidated Balance Sheets (unaudited) includes both billed and unbilled amounts, as well as certain amounts that are not related to customer revenues. Unbilled amounts of accounts receivable relate to a portion of a customer's consumption of gas or electricity from the date of the last cycle billing through the last day of the month (balance sheet date). Factors taken into consideration when estimating unbilled revenue include historical usage, customer rates, and weather. A significant portion of our operations are subject to seasonal fluctuations in sales. During the heating season, primarily from November through March, revenues and receivables from gas sales are more significant than in other months. The balances of customer receivables as of March 31, 2026 and December 31, 2025 are presented in the table below. We had no significant contract assets or liabilities during the period. Additionally, we have not incurred any significant costs to obtain or fulfill contracts.

---

| | | |
|:---|:---|:---|
| *(in millions)* | Customer Accounts Receivable, Billed (less reserve) | Customer Accounts Receivable, Unbilled (less reserve) |
| Balance as of December 31, 2025 | $698.8 | $465.2 |
| **Balance as of March 31, 2026** | $**1016.1** | $**182.7** |

---

Utility revenues are billed to customers monthly on a cycle basis. We expect that substantially all customer accounts receivable will be collected following customer billing, as this revenue consists primarily of periodic, tariff-based billings for service and usage. We maintain common utility credit risk mitigation practices, including requiring deposits and actively pursuing collection of past due amounts. Our regulated operations also utilize certain regulatory mechanisms that facilitate recovery of bad debt costs within tariff-based rates, which provides further evidence of collectability. It is probable that substantially all of the consideration to which we are entitled from customers will be collected upon satisfaction of performance obligations.

***Allowance for Credit Losses.*** To evaluate for expected credit losses, customer account receivables are pooled based on similar risk characteristics, such as customer type, geography, payment terms, and related macro-economic risks. Expected credit losses are established using a model that considers historical collections experience, current information, and reasonable and supportable forecasts. Internal and external inputs are used in our credit model including, but not limited to, revenue projections, actual charge-offs data, recoveries data, shut-offs, security deposits and final bill data. We continuously evaluate available information relevant to assessing collectability of current and future receivables. We evaluate creditworthiness of specific customers periodically or following changes in facts and circumstances. When we become aware of a specific commercial or industrial customer's inability to pay, an allowance for expected credit losses is recorded for the relevant amount. We also monitor other circumstances that could affect our overall expected credit losses including, but not limited to, creditworthiness of overall population in service territories, adverse conditions impacting an industry sector, and current economic conditions.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

At each reporting period, we record expected credit losses to an allowance for credit losses account. When deemed to be uncollectible, customer accounts are written-off. Rollforwards of our allowance for credit losses as of March 31, 2026 and December 31, 2025 are presented in the table below:

---

| | | | |
|:---|:---|:---|:---|
| <br>(*in millions*) | Columbia Operations | NIPSCO Operations | Total |
| **Balance as of December 31, 2025** | $**15.6** | $**25.0** | $**40.6** |
| &nbsp;&nbsp;&nbsp;&nbsp;Current period provisions | 11.8 | 6.6 | 18.4 |
| &nbsp;&nbsp;&nbsp;&nbsp;Write-offs charged against allowance | (12.1) | (4.4) | (16.5) |
| &nbsp;&nbsp;&nbsp;&nbsp;Recoveries of amounts previously written off | 3.2 | 0.4 | 3.6 |
| **Balance as of March 31, 2026** | $**18.5** | $**27.6** | $**46.1** |

---

---

| | | | |
|:---|:---|:---|:---|
| (*in millions*) | Columbia Operations | NIPSCO Operations | Total |
| Balance as of December 31, 2024 | $9.8 | $13.9 | $23.7 |
| &nbsp;&nbsp;&nbsp;&nbsp;Current period provisions | 42.3 | 25.0 | 67.3 |
| &nbsp;&nbsp;&nbsp;&nbsp;Write-offs charged against allowance | (50.8) | (15.0) | (65.8) |
| &nbsp;&nbsp;&nbsp;&nbsp;Recoveries of amounts previously written off | 14.3 | 1.1 | 15.4 |
| Balance as of December 31, 2025 | $15.6 | $25.0 | $40.6 |

---

**4.&nbsp;&nbsp;&nbsp;&nbsp;Noncontrolling Interests** 

***Variable Interest Entities.*** A VIE is an entity in which the controlling interest is determined through means other than a majority voting interest. NIPSCO is the managing member and operator of two wind JVs, Rosewater and Indiana Crossroads Wind, which have 102 MW and 302 MW of nameplate capacity, respectively. NIPSCO is also a managing member and operator of two solar JVs, Indiana Crossroads Solar and Dunn's Bridge I, which have a nameplate capacity of 200 MW and 265 MW, respectively. We have determined that these JVs are VIEs. NIPSCO controls decisions that are significant to these entities' ongoing operations and economic results. Therefore, we have concluded that NIPSCO is the primary beneficiary and have consolidated all four entities.

Members of each respective JV include NIPSCO (who is the managing member) and a tax equity partner. Earnings, tax attributes and cash flows are allocated to both NIPSCO and the tax equity partner in varying percentages by category and over the life of the partnership. NIPSCO and each tax equity partner contributed cash to the respective JV. Once the tax equity partner has earned their negotiated rate of return and have reached a stated contractual date, NIPSCO has the option to purchase the remaining interest in the respective JV, at fair market value, from the tax equity partner. NIPSCO has an obligation to purchase 100% of the electricity generated by each commercially operational JV.

We did not provide any financial or other support for the JVs during the quarter that was not contractually required.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

Our Condensed Consolidated Balance Sheets (unaudited) included the following assets and liabilities associated with the JV VIEs.

---

| | | |
|:---|:---|:---|
| *(in millions)* | **March 31, 2026** | December 31, 2025 |
| &nbsp;&nbsp;Net property, plant and equipment | $**1261.6** | $1273.0 |
| &nbsp;&nbsp;Current assets | **27.6** | 27.6 |
| Total assets<sup>(1)</sup> | **1289.2** | 1300.6 |
| &nbsp;&nbsp;Current liabilities | **10.5** | 16.1 |
| &nbsp;&nbsp;Asset retirement obligations | **56.3** | 55.7 |
| &nbsp;&nbsp;Finance lease obligations | **40.1** | 40.1 |
| Total liabilities<sup>(1)(2)</sup> | $**106.9** | $111.9 |

---

<sup>(1)</sup> The assets of each VIE represent assets of a consolidated VIE that can be used only to settle obligations of the respective consolidated VIE. The creditors of the liabilities of the VIEs do not have recourse to the general credit of the primary beneficiary.

<sup>(2)</sup> In addition to the amounts disclosed above there is a de minimis amount of other noncurrent assets and liabilities at Rosewater as of March 31, 2026.

***GenCo Minority Interest Transaction.*** In October 2025, a 19.9% equity interest in NiSource's wholly owned subsidiary, Generation Holdings II, the sole owner of GenCo, was issued to BIP Orion Holdco L.P. and BIP Orion Holdco II L.P., affiliates of Blackstone (collectively, "Blackstone Investor"), in exchange for $35.2 million in cash contributions to Generation Holdings II through the Generation Holdings II LLC Agreement. Generation Holdings II is considered a VIE as it passes the variability of its operating results through to its shareholders (Generation Holdings I and Blackstone Investor) and has insufficient equity to finance its activities without additional subordinated financial support. The sole purpose of the VIE is to own and operate GenCo which will acquire and build generation assets and provide capacity and electricity to support data center customers. Generation Holdings II and its wholly owned subsidiary, GenCo, is a consolidated VIE, as we have the power to direct the significant decision-making activities that most impact the ongoing operations and economic performance of the entity (i.e., we are the primary beneficiary) including business development and operating decisions. See Note 4 to the Company's Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2025, for additional details on the Generation Holdings II LLC Agreement.

During the first quarter of 2026, we received $8.0 million of contributions and we made zero distributions to our Generation Holdings II minority interest holders based on their relative ownership percentages. There were no contributions received or distributions made during the first quarter of 2025.

Our Condensed Consolidated Balance Sheets (unaudited) included the following assets and liabilities associated with the GenCo VIE:

---

| | | |
|:---|:---|:---|
| *(in millions)* | **March 31, 2026** | December 31,<br>2025 |
| &nbsp;&nbsp;Net Property, Plant and Equipment | $**244.8** | $39.7 |
| &nbsp;&nbsp;Current assets | **82.5** | 62.5 |
| &nbsp;&nbsp;Other assets | **201.5** | 305.4 |
| Total assets<sup>(1)</sup> | **528.8** | 407.6 |
| &nbsp;&nbsp;Current liabilities | **123.6** | 40.8 |
| Total liabilities<sup>(1)</sup> | $**123.6** | $40.8 |

---

<sup>(1)</sup> The assets of each VIE represent assets of a consolidated VIE that can be used only to settle obligations of the respective consolidated VIE. The creditors of the liabilities of the VIEs do not have recourse to the general credit of the primary beneficiary.

***Voting Interest Entities.*** We retain a controlling financial interest in NIPSCO Holdings II and its subsidiaries and consolidate their financial results. See Note 4 to the Company's Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2025, for additional details on the Amended NIPSCO Holdings II LLC Agreement. The following table provides information about the contributions from and distributions to our NIPSCO minority interest holders

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

included in our Condensed Statements of Consolidated Cash Flows (unaudited) and Condensed Statements of Consolidated Equity (unaudited).

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
| <br>*(in millions)* | **2026** | 2025 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Contributions from NIPSCO minority interest holders | $**25.5** | $34.8 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Distributions to NIPSCO minority interest holders | **19.9** | 17.5 |

---

**5.&nbsp;&nbsp;&nbsp;&nbsp;Earnings Per Share**

The calculations of basic and diluted EPS are based on the weighted average number of shares of common stock and potential common stock outstanding during the period. Diluted EPS includes the incremental effects of the various long-term incentive compensation plans and ATM forward sale agreements under the treasury stock method when the impact would be dilutive (See Note 6, "Equity").

We use the two-class method of computing earnings per share because we have participating securities in the form of non-vested restricted stock units with a non-forfeitable right to dividend equivalents, for which vesting is predicated solely on the passage of time. The calculation of earnings per share using the two-class method excludes income attributable to these participating securities from the numerator and excludes the dilutive impact of those shares from the denominator.

The following table presents the calculation of our basic and diluted EPS:

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
|<br>*(in millions, except per share amounts)* | **2026** | 2025 |
| **Numerator:** |  |  |
| Net Income Available to Common Shareholders | $**510.7** | $474.8 |
| &nbsp;&nbsp;Less: Income allocated to participating securities | **1.1** | 0.8 |
| Net Income Available to Common Shareholders - Basic | **509.6** | 474.0 |
| Net Income Available to Common Shareholders - Diluted | $**509.6** | $474.0 |
| **Denominator:** |  |  |
| Average common shares outstanding - Basic | **479.0** | 470.4 |
| &nbsp;&nbsp;Dilutive potential common shares: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Shares contingently issuable under employee stock plans | **1.6** | 1.4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Shares restricted under employee stock plans | **0.1** | 0.7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ATM forward sale agreements | **0.2** |  |
| Average Common Shares - Diluted | **480.9** | 472.5 |
| **Earnings per common share:** |  |  |
| &nbsp;&nbsp;Basic | $**1.06** | $1.01 |
| &nbsp;&nbsp;Diluted | $**1.06** | $1.00 |

---

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

**6.&nbsp;&nbsp;&nbsp;&nbsp;Equity**

***ATM Program.*** In October 2025, we entered into eleven separate equity distribution agreements providing for the sale up to an aggregate of $1.5 billion of our common stock.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• In October 2025, we executed a forward sale agreement, which allows us to issue a fixed number of shares at a price to be settled in the future. The forward purchaser under our forward sale agreement borrowed 2,390,057 shares from third parties, which the forward purchaser sold, through its affiliated agent, at a weighted average price of $41.84 per share. We may settle the forward sale agreement in shares, cash or net shares by October 2026. Had we settled all of the shares under the forward sale agreement at March 31, 2026, we would have received approximately $99.7 million, based on a net price of $41.72 per share.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• In February 2026, we executed a forward sale agreement, which allows us to issue a fixed number of shares at a price to be settled in the future. The forward purchaser under our forward sale agreement borrowed 2,200,000 shares from third parties, which the forward purchaser sold, through its affiliated agent, at a weighted average price of $45.63 per share. We may settle the forward sale agreement in shares, cash or net shares by December 2026. Had we settled all of the shares under the forward sale agreement at March 31, 2026, we would have received approximately $99.9 million, based on a net price of $45.43 per share.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• As of March 31, 2026, the ATM program inclusive of the outstanding forward sale agreements had approximately $1.25 billion of equity capacity available. The ATM program expires in December 2028.

***Preferred Stock.*** During the first quarter of 2026, following the issuance of final U.S. Treasury and Internal Revenue Service regulations clarifying the scope and application of the federal excise tax on stock repurchases made after December 31, 2022, we evaluated the applicability of the excise tax to our 2023 Series A Preferred Stock redemption premium. Based on this assessment, we determined that the excise tax previously recorded does not apply to these share repurchases. Accordingly, we reversed approximately $3.6 million of excise tax expense and recognized a receivable as of March 31, 2026, for the expected refund of the amounts previously remitted.

**7.&nbsp;&nbsp;&nbsp;&nbsp;Short-Term Borrowings**

We generate short-term borrowings from our revolving credit facility, commercial paper program, and accounts receivable transfer programs. Each of these borrowing sources is described further below.

***Revolving Credit Facility.*** We maintain a revolving credit facility to fund ongoing working capital requirements, including the provision of liquidity support for our commercial paper program, the issuance of letters of credit and general corporate purposes. Our revolving credit facility has a facility limit of $2.50 billion and is comprised of a syndicate of banks. We had no outstanding borrowings under this facility as of March 31, 2026 and December 31, 2025, respectively.

***Commercial Paper Program.*** In March 2026, we increased our commercial paper program limit from $1.85 billion to $2.50 billion. We had $1,291.0 million and $736.0 million of commercial paper outstanding with weighted-average interest rates of 4.12% and 3.92% as of March 31, 2026 and December 31, 2025, respectively.

***Accounts Receivable Transfer Programs.*** Columbia of Ohio, NIPSCO, and Columbia of Pennsylvania each maintain a receivables agreement whereby they transfer their customer accounts receivables to third-party financial institutions through consolidated special purpose entities. The three agreements expire between August 2026 and April 2027 and may be further extended if mutually agreed to by the parties thereto.

All receivables transferred to third parties are valued at face value, which approximates fair value due to their short-term nature. The amount of the undivided percentage ownership interest in the accounts receivables transferred is determined in part by required loss reserves under the agreements.

Transfers of accounts receivable are accounted for as secured borrowings resulting in the recognition of short-term borrowings on the Condensed Consolidated Balance Sheets (unaudited). As of March 31, 2026, the maximum amount of debt that could be borrowed related to our accounts receivable programs was $375.0 million.

We had no short-term borrowings related to the securitization transactions as of March 31, 2026 and December 31, 2025, respectively.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

For the three months ended March 31, 2026 and 2025, zero and $250.0 million, respectively, were recorded as cash flows from financing activities related to the change in short-term borrowings due to securitization transactions. Columbia of Ohio, NIPSCO and Columbia of Pennsylvania remain responsible for collecting on the receivables securitized, and the receivables cannot be transferred to another party.

Items listed above are presented net in the Condensed Statements of Consolidated Cash Flows (unaudited) as turnover is quick, the amounts are large, and their maturities are less than 90 days.

**8.&nbsp;&nbsp;&nbsp;&nbsp;Regulatory Matters**

***<u>Regulatory Assets and Liabilities.</u>*** We follow the accounting and reporting requirements of ASC Topic 980, which provides that regulated entities account for and report assets and liabilities consistent with the economic effect of regulatory rate-making procedures when the rates established are designed to recover the costs of providing the regulated service and it is probable that such rates will be charged to and collected from customers. Certain expenses and credits subject to utility regulation or rate determination normally reflected in income or expense are deferred on the balance sheet and are recognized in the income statement as the related amounts are included in customer rates and recovered from or refunded to customers. We assess the probability of collection for all of our regulatory assets each period. The offset to the regulatory liability associated with our renewable investments included in regulated rates is recorded in "Depreciation and amortization" on the Condensed Statements of Consolidated Income (unaudited).

***<u>NIPSCO Electric rate case filing.</u>*** Following the IURC order in June 2025, new rates were implemented in multiple steps beginning in July 2025 and the final step was implemented in March 2026.

***<u>Columbia of Pennsylvania rate case filing.</u>*** Following the order in December 2025, rates became effective in January 2026. Two parties filed petitions for reconsideration on certain aspects of the final order; however, the Pennsylvania Public Utility Commission issued a final order in February 2026 denying reconsiderations and the timeline for appeal has passed.

***<u>NIPSCO Electric Special Contract and GenCo PPA filing.</u>*** In November 2025, NIPSCO and GenCo filed an application with the IURC seeking approval of (i) a retail special contract for electric service between NIPSCO and ADS, (ii) a related power purchase agreement between NIPSCO and GenCo, and (iii) an alternative regulatory plan and associated accounting treatment. Testimony from the Indiana Office of the Utility Consumer Counselor ("OUCC") and intervenors was filed in January 2026. In February 2026, NIPSCO, GenCo, the OUCC, and the NIPSCO Industrial Group filed a Stipulation and Settlement Agreement ("Settlement") resolving all issues and accompanying testimony with the IURC. The Citizens Action Coalition is opposing the Settlement, and the LaPorte County Board of Commissioners is not opposing the Settlement. A settlement hearing occurred in April 2026. An order is anticipated in the second quarter of 2026.

In April 2026, NIPSCO submitted a compliance filing containing an amendment to the ADS Contract to accelerate the delivery of capacity to ADS. This compliance filing is expected to be acted upon at the same time as IURC's order noted above. NIPSCO and GenCo also filed an application with the IURC seeking approval of (i) a retail special contract for electric service between NIPSCO and a wholly owned subsidiary of Alphabet, (ii) a related power purchase agreement between NIPSCO and GenCo, and (iii) an alternative regulatory plan and associated accounting treatment. A procedural schedule has not been established, but an order is expected in the third quarter of 2026.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

***<u>202(c) Emergency Order for R.M. Schahfer coal facility.</u>*** Before the planned retirement of the R.M. Schahfer coal facility at the end of December 2025, NIPSCO received the first of successive emergency orders under section 202(c) of the Federal Power Act, to continue operating in 90-day increments, currently through June 21, 2026. The orders stated that continued operation of R.M. Schahfer is required to meet an energy emergency across MISO's North and Central regions. Consistent with the Federal Power Act and the U.S. Department of Energy regulations, the order authorizes NIPSCO to obtain cost recovery pursuant to 16 U.S.C. § 824a(c). As directed, NIPSCO continued to make R.M. Schahfer available in the MISO market. Following receipt of the initial emergency order, NIPSCO filed a complaint with FERC seeking a modification of the MISO tariff to establish a mechanism for recovery and allocation of the cost to comply with this order. In March 2026, FERC ordered MISO to make a compliance filing with tariff language for NIPSCO recovery and allocation of the cost to comply with this order within 30 days of FERC approving MISO's tariff in Consumer's FERC 202(c) complaint. NIPSCO filed a petition with the IURC to recover federally mandated costs related to the U.S. Department of Energy's 202(c) order in December of 2025, but the proceeding is being held in abeyance pending resolution of FERC/MISO level recovery of costs incurred while operating under the 202(c) order. While we do not believe IURC-level recovery under the FMCA Statute will be required, the petition was filed to preserve the right to seek such recovery if needed. Should such recovery become necessary, NIPSCO intends to file testimony and evidence outlining and justifying its request at a later date. As of March 31, 2026, $65.9 million has been deferred to non-current regulatory assets for incremental costs incurred to comply with the 202(c) Emergency Order and $54.4 million of non-current regulatory liabilities have been established for net MISO revenues and customer receipts in the first quarter of 2026. At present, NIPSCO is filing quarterly status reports with the IURC to keep them informed.

***<u>IURC Investigation.</u>*** In November 2025, the IURC initiated an investigation into the accuracy of NIPSCO's gas meters. This investigation followed NIPSCO's disclosure of a latent issue with a small percentage of the meter indexes in NIPSCO's gas meters, which was discovered during roll-out of new AMI communications modules for gas meters. NIPSCO filed testimony in March 2026 and a hearing is scheduled for July 2026.

**9.&nbsp;&nbsp;&nbsp;&nbsp;Risk Management Activities**

We are exposed to certain risks relating to our ongoing business operations, namely commodity price risk and interest rate risk. We recognize that the prudent and selective use of derivatives may help to limit volatility in the price of natural gas and manage interest rate exposure.

Risk management assets and liabilities on our derivatives are presented on the Condensed Consolidated Balance Sheets (unaudited) as shown below:

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **March 31, 2026** | **March 31, 2026** | December 31, 2025 | December 31, 2025 |
| *(in millions)* | **Assets** | **Liabilities** | Assets | Liabilities |
| Current<sup>(1)</sup> |  |  |  |  |
| &nbsp;&nbsp;Derivatives not designated as hedging instruments | $**4.9** | $**2.9** | $9.7 | $2.1 |
| Total | $**4.9** | $**2.9** | $9.7 | $2.1 |
| Noncurrent<sup>(2)</sup> |  |  |  |  |
| &nbsp;&nbsp;Derivatives not designated as hedging instruments | $**11.9** | $**6.8** | $9.1 | $3.8 |
| Total | $**11.9** | $**6.8** | $9.1 | $3.8 |

---

<sup>(1)</sup> Current assets and liabilities are presented in "Other current assets" and "Other accruals", respectively, on the Condensed Consolidated Balance Sheets (unaudited).

<sup>(2)</sup> Noncurrent assets and liabilities are presented in "Deferred charges and other" and "Other noncurrent liabilities", respectively, on the Condensed Consolidated Balance Sheets (unaudited).

Our derivative instruments are subject to enforceable master netting arrangements or similar agreements. No collateral was either received or posted related to our outstanding derivative positions at March 31, 2026. If the above gross asset and liability positions were presented net of amounts owed or receivable from counterparties, we would report a net asset position of $7.1 million and $12.9 million as of March 31, 2026 and December 31, 2025, respectively.

<u>Derivatives Not Designated as Hedging Instruments</u>

***Commodity price risk management.*** We, along with our utility customers, are exposed to variability in cash flows associated with natural gas purchases and volatility in natural gas prices. We purchase natural gas for sale and delivery to our retail, commercial and industrial customers, and for most customers the variability in the market price of gas is passed through in their

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

rates. Some of our utility subsidiaries offer programs whereby variability in the market price of gas is assumed by the respective utility. The objective of our commodity price risk programs is to mitigate the gas cost variability, for us or on behalf of our customers, associated with natural gas purchases or sales by economically hedging the various gas cost components using a combination of futures, options, forwards or other derivative contracts. As of March 31, 2026 and December 31, 2025, we had 82.2 MMDth and 83.7 MMDth, respectively, of net energy derivative volumes outstanding related to our natural gas hedges.

NIPSCO has received IURC approval to lock in a fixed price for its natural gas customers using long-term forward purchase instruments and is limited to 20% of NIPSCO's average annual GCA purchase volume. As of March 31, 2026, the remaining terms of these instruments range from one to six years. Likewise, Columbia of Pennsylvania has received approval for a 24-month rolling hedge program that will continue in perpetuity. The program is designed to financially hedge approximately 20% of the customers' annual demand. Under both programs, all gains and losses on these derivative contracts are deferred as regulatory liabilities or assets and are remitted to or collected from customers through the relevant cost recovery mechanism.

The following table summarizes the gains and losses associated with the commodity price risk programs deferred as regulatory assets and liabilities:

---

| | | |
|:---|:---|:---|
| *(in millions)* | **March 31, 2026** | December 31, 2025 |
| **Regulatory Assets** |  |  |
| &nbsp;&nbsp;Losses on commodity price risk programs | $**12.7** | $10.1 |
| **Regulatory Liabilities** |  |  |
| &nbsp;&nbsp;Gains on commodity price risk programs | $**17.3** | $19.2 |

---

Our derivative instruments measured at fair value as of March 31, 2026 and December 31, 2025 do not contain any credit-risk-related contingent features.

<u>Derivatives Designated as Hedging Instruments</u>

***Interest rate risk management.*** As of March 31, 2026 and December 31, 2025, we had no active interest rate swap positions. We have recorded the overall net loss related to previously settled interest rate swaps in AOCI. The gain or loss associated with each previously settled interest rate swap is amortized in interest expense over the term of each corresponding debt issuance. These amounts were immaterial for the three months ended March 31, 2026 and 2025 and are recorded in "Interest expense, net" on the Condensed Statements of Consolidated Income (unaudited). Amounts expected to be reclassified to earnings during the next twelve months are immaterial. See Note 14, "Accumulated Other Comprehensive Loss," for additional information.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

**10.&nbsp;&nbsp;&nbsp;&nbsp;Fair Value**

**A.&nbsp;&nbsp;&nbsp;&nbsp;Fair Value Measurements**

<u>Recurring Fair Value Measurements</u>

The following tables present financial assets and liabilities measured and recorded at fair value on our Condensed Consolidated Balance Sheets (unaudited) on a recurring basis and their level within the fair value hierarchy as of March 31, 2026 and December 31, 2025. As of March 31, 2026 and December 31, 2025, there were no material transfers between fair value hierarchies. Additionally, there were no changes in the method or significant assumptions used to estimate the fair value of our financial instruments.

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Recurring Fair Value Measurements<br>March 31, 2026 *(in millions)*** | **Quoted Prices in<br>Active Markets<br>for Identical<br>Assets<br>(Level 1)** | **Significant<br>Other<br>Observable<br>Inputs<br>(Level 2)** | **Significant<br>Unobservable<br>Inputs<br>(Level 3)** | **Balance as of** <br>**March 31, 2026** |
| **Assets** | | | | |
| &nbsp;&nbsp;&nbsp;&nbsp;Risk management assets | $— | $16.8 | $— | $16.8 |
| &nbsp;&nbsp;&nbsp;&nbsp;Available-for-sale debt securities |  | 156.7 |  | 156.7 |
| &nbsp;&nbsp;&nbsp;&nbsp;Equity securities<sup>(1)(2)</sup> | 8.7 | **—** | **—** | 8.7 |
| **Total** | $**8.7** | $**173.5** | $**—** | $**182.2** |
| **Liabilities** |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Risk management liabilities | $— | $9.7 | $— | $9.7 |
| **Total** | $**—** | $**9.7** | $**—** | $**9.7** |

---

<sup>(1)</sup> Equity securities are in a high dividend equity fund and are valued using market prices in active markets. Level 1 instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets. Equity securities are presented in "Other Investments" on the Condensed Consolidated Balance Sheets (unaudited).

<sup>(2)</sup> As of March 31, 2026, the investment cost of equity securities measured at fair value was $7.9 million, gross unrealized gains were $0.9 million, and the fair value was $8.7 million.

---

| | | | | |
|:---|:---|:---|:---|:---|
| Recurring Fair Value Measurements<br>December 31, 2025 *(in millions)* | Quoted Prices in<br>Active Markets<br>for Identical<br>Assets<br>(Level 1) | Significant<br>Other<br>Observable<br>Inputs<br>(Level 2) | Significant<br>Unobservable<br>Inputs<br>(Level 3) | Balance as of<br>December 31, 2025 |
| **Assets** |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Risk management assets | $— | $18.8 | $— | $18.8 |
| &nbsp;&nbsp;&nbsp;&nbsp;Available-for-sale debt securities |  | 146.1 |  | 146.1 |
| &nbsp;&nbsp;&nbsp;&nbsp;Equity Securities<sup>(1)(2)</sup> | 8.5 |  |  | 8.5 |
| **Total** | $8.5 | $164.9 | $— | $173.4 |
| **Liabilities** |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Risk management liabilities | $— | $5.9 | $— | $5.9 |
| **Total** | $— | $5.9 | $— | $5.9 |

---

<sup>(1)</sup> Equity securities are in a high dividend equity fund and are valued using market prices in active markets. Level 1 instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets. Equity securities are presented in "Other Investments" on the Condensed Consolidated Balance Sheets (unaudited).

<sup>(2)</sup> As of December 31, 2025, the investment cost of equity securities measured at fair value was $7.9 million, gross unrealized gains were $0.7 million, and the fair value was $8.5 million.

*Level 1-* When utilized, exchange-traded derivative contracts are based on unadjusted quoted prices in active markets and are classified within Level 1. These financial assets and liabilities are secured with cash on deposit with the exchange; therefore, nonperformance risk has not been incorporated into these valuations. These financial assets and liabilities are deemed to be cleared and settled daily by NYMEX as the related cash collateral is posted with the exchange. As a result of this exchange rule, NYMEX derivatives are considered to have no fair value at the balance sheet date for financial reporting purposes, and are

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

presented in Level 1 net of posted cash; however, the derivatives remain outstanding and are subject to future commodity price fluctuations until they are settled in accordance with their contractual terms.

*Level 2-* Certain non-exchange-traded derivatives are valued using broker or over-the-counter, on-line exchanges. In such cases, these non-exchange-traded derivatives are classified within Level 2. Non-exchange-based derivative instruments include swaps, forwards, and options. In certain instances, these instruments may utilize models to measure fair value taking into consideration credit risk. We use a similar model to value similar instruments. Valuation models utilize various inputs that include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, other observable inputs for the asset or liability and market-corroborated inputs, (i.e., inputs derived principally from or corroborated by observable market data by correlation or other means). Where observable inputs are available for substantially the full term of the asset or liability, the instrument is categorized within Level 2.

*Level 3-* Certain derivatives trade in less active markets with a lower availability of pricing information and models may be utilized in the valuation. When such inputs have a significant impact on the measurement of fair value, the instrument is categorized within Level 3.

***Risk Management Assets and Liabilities.*** Risk management assets and liabilities include exchange-traded NYMEX futures and NYMEX options and non-exchange-based forward purchase contracts. NIPSCO and Columbia of Pennsylvania have entered into long-term forward natural gas purchase instruments to lock in a fixed price for natural gas customers. We value these contracts using a pricing model that incorporates market-based information when available, as these instruments trade less frequently and are classified within Level 2 of the fair value hierarchy. For additional information, see Note 9, "Risk Management Activities."

***Available-for-Sale Debt Securities.*** Available-for-sale debt securities are investments pledged as collateral for trust accounts related to our wholly owned insurance company. We value U.S. Treasury, corporate debt and mortgage-backed securities using a matrix pricing model that incorporates market-based information. These securities trade less frequently and are classified within Level 2.

Our available-for-sale debt securities impairments are recognized periodically using an allowance approach. At each reporting date, we utilize a quantitative and qualitative review process to assess the impairment of available-for-sale debt securities at the individual security level. For securities in a loss position, we evaluate our intent to sell or whether it is more-likely-than-not that we will be required to sell the security prior to the recovery of its amortized cost. If either criteria is met, the loss is recognized in earnings immediately, with the offsetting entry to the carrying value of the security. If both criteria are not met, we perform an analysis to determine whether the unrealized loss is related to credit factors. The analysis focuses on a variety of factors that include, but are not limited to, downgrade on ratings of the security, defaults in the current reporting period or projected defaults in the future, the security's yield spread over treasuries, and other relevant market data. If the unrealized loss is not related to credit factors, it is included in other comprehensive income. If the unrealized loss is related to credit factors, the loss is recognized as credit loss expense in earnings during the period, with an offsetting entry to the allowance for credit losses. The amount of the credit loss recorded to the allowance account is limited by the amount at which the security's fair value is less than its amortized cost basis. If certain amounts recorded in the allowance for credit losses are deemed uncollectible, the allowance on the uncollectible portion will be charged off, with an offsetting entry to the carrying value of the security. Subsequent improvements to the estimated credit losses of available-for-sale debt securities will be recognized immediately in earnings. Continuous credit monitoring and portfolio credit balancing mitigates our risk of credit losses on our available-for-sale debt securities.

------

The amortized cost, gross unrealized gains and losses, allowance for credit losses, and fair value of available-for-sale securities at March 31, 2026 and December 31, 2025 were:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **March 31, 2026 *(in millions)*** | **Amortized<br>Cost** | **Gross Unrealized Gains** | **Gross Unrealized Losses**<sup>(1)</sup> | **Fair<br>Value** |
| **Available-for-sale debt securities** | | | | |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury debt securities | $7.6 | $— | $— | $7.6 |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate/Other debt securities | 150.2 | 1.5 | (2.6) | 149.1 |
| **Total** | $**157.8** | $**1.5** | $**(2.6)** | $**156.7** |
| December 31, 2025 *(in millions)* | Amortized<br>Cost | Gross Unrealized Gains | Gross Unrealized Losses<sup>(2)</sup> | Fair<br>Value |
| **Available-for-sale debt securities** |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury debt securities | $9.5 | $— | $— | $9.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate/Other debt securities | 136.3 | 2.4 | (2.1) | 136.6 |
| **Total** | $**145.8** | $**2.4** | $**(2.1)** | $**146.1** |

---

<sup>(1)</sup> Fair value of U.S. Treasury debt securities and Corporate/Other debt securities in an unrealized loss position without an allowance for credit losses is $4.6 million and $71.3 million, respectively, at March 31, 2026.

<sup>(2)</sup> Fair value of U.S. Treasury debt securities and Corporate/Other debt securities in an unrealized loss position without an allowance for credit losses is $3.5 million and $40.2 million, respectively, at December 31, 2025.

The cost of maturities sold is based upon specific identification. Net realized gains and losses on available-for-sale securities were de minimis for the three months ended March 31, 2026 and 2025, respectively. At March 31, 2026, approximately $10.6 million and $3.1 million of Corporate/Other debt securities and U.S. Treasury debt securities, respectively, had maturities of less than a year.

***Equity Investments.*** Investments measured at net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. These investments represent holdings in a single private investment fund that are redeemable at the election of the holder. As of March 31, 2026 and December 31, 2025, the Company holds $18.2 million and $17.9 million of equity investments measured at net asset value, respectively.

<u>Non-recurring Fair Value Measurements</u>

We measure the fair value of certain assets, including goodwill, on a non-recurring basis, typically when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. As of March 31, 2026, no non-recurring fair value adjustments have been made.

**B.&nbsp;&nbsp;&nbsp;&nbsp;Other Fair Value Disclosures for Financial Instruments.** The carrying amount of cash and cash equivalents, restricted cash, notes receivable, customer deposits and short-term borrowings is a reasonable estimate of fair value due to their liquid or short-term nature. Our long-term borrowings are recorded at historical amounts.

The following method and assumptions were used to estimate the fair value of each class of financial instruments.

***Long-term Debt.*** The fair value of outstanding long-term debt is estimated based on the quoted market prices for the same or similar securities. Certain premium costs associated with the early settlement of long-term debt are not taken into consideration in determining fair value. These fair value measurements are classified within Level 2 of the fair value hierarchy. As of March 31, 2026, there was no change in the method or significant assumptions used to estimate the fair value of long-term debt.

The carrying amount and estimated fair values of these financial instruments were as follows:

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| | | | | |
|:---|:---|:---|:---|:---|
| *(in millions)* | **Carrying**<br>**Amount as of**<br>**March 31, 2026** | **Estimated Fair**<br>**Value as of**<br>**March 31, 2026** | Carrying<br>Amount as of<br>Dec. 31, 2025 | Estimated Fair<br>Value as of<br>Dec. 31, 2025 |
| Long-term debt (including current portion) | $**15475.7** | $**14785.1** | $15477.5 | $14975.3 |

---

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

**11.&nbsp;&nbsp;&nbsp;&nbsp;Income Taxes**

Our interim effective tax rates reflect the estimated annual effective tax rates for 2026 and 2025 applied to year-to-date pretax income, adjusted for tax expense associated with certain discrete items. The effective tax rates for the three months ended March 31, 2026 and 2025 were 13.4% and 16.7%, respectively. These effective tax rates differ from the federal statutory tax rate of 21% primarily due to net income attributable to noncontrolling interest, amortization of excess deferred income taxes, federal tax credits net of deferred regulatory liabilities, state income taxes, and other permanent book-to-tax differences.

The decrease in the three month effective tax rate of 3.3% in 2026 compared to 2025 is primarily driven by increases in pass back of federal investment and production tax credits, amortization of excess deferred income taxes, and other permanent book-to-tax differences.

As of March 31, 2026, there have been no material changes to our unrecognized tax benefits or possible changes that could reasonably be expected to occur during the next twelve months. See Note 15 to the Company's Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2025, for a discussion of these unrecognized tax benefits.

**12.&nbsp;&nbsp;&nbsp;&nbsp;Pension and Other Postemployment Benefits**

We provide defined contribution plans and noncontributory defined benefit retirement plans that cover certain of our employees. Benefits under the defined benefit retirement plans reflect the employees' compensation, years of service and age at retirement. Additionally, we provide health care and life insurance benefits for certain retired employees. Certain active employees may become eligible for these benefits if they reach retirement age while working for us. The expected cost of such benefits is accrued during the employees' years of service. We determined that, for certain rate-regulated subsidiaries, the future recovery of postretirement benefit costs is probable, and we record regulatory assets and liabilities for amounts that would otherwise have been recorded to expense or accumulated other comprehensive loss. Current rates of rate-regulated companies include postretirement benefit costs, including amortization of the regulatory assets and liabilities that arose prior to inclusion of these costs in rates. For most plans, cash contributions are remitted to grantor trusts.

For the three months ended March 31, 2026 and 2025, we contributed $1.5 million and $0.5 million, respectively, to our pension plans and $1.1 million and $4.9 million, respectively, to our OPEB plans.

The following table provides the components of the plans' actuarially determined net periodic benefit cost for the three months ended March 31, 2026 and 2025:

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Pension Benefits** | **Pension Benefits** | **OPEB** | **OPEB** |
| Three Months Ended March 31, *(in millions)* | **2026** | 2025 | **2026** | 2025 |
| **Components of Net Periodic Benefit Cost**<sup>(1)</sup> |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Service cost | $**5.3** | $4.9 | $**0.8** | $1.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;Interest cost | **14.1** | 16.0 | **4.6** | 5.6 |
| &nbsp;&nbsp;&nbsp;&nbsp;Expected return on assets | **(22.5)** | (23.1) | **(4.1)** | (4.2) |
| &nbsp;&nbsp;&nbsp;&nbsp;Amortization of prior service credit | **—** |  | **(1.1)** | (0.4) |
| &nbsp;&nbsp;&nbsp;&nbsp;Recognized actuarial loss | **5.9** | 6.4 | **0.1** | 0.4 |
| **Total Net Periodic Benefit Cost** | $**2.8** | $4.2 | $**0.3** | $2.4 |
| <sup>(1)</sup>The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited).  | <sup>(1)</sup>The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited).  | <sup>(1)</sup>The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited).  | <sup>(1)</sup>The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited).  | <sup>(1)</sup>The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited).  |

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

**13.&nbsp;&nbsp;&nbsp;&nbsp;Other Commitments and Contingencies**

**A. Guarantees and Indemnities.** We and certain of our subsidiaries enter into various agreements providing financial or performance assurance to third parties on behalf of certain subsidiaries as a part of normal business. Such agreements include guarantees and stand-by letters of credit. These agreements are entered into primarily to support or enhance the creditworthiness otherwise attributed to a subsidiary on a stand-alone basis, thereby facilitating the extension of sufficient credit to accomplish the subsidiaries' intended commercial purposes. As of March 31, 2026 and December 31, 2025, we had issued letters of credit of $119.0 million for the benefit of third parties.

We provide guarantees related to our future performance under BTAs for our renewable generation projects. At March 31, 2026 and December 31, 2025, our guarantees for multiple BTAs totaled $27.2 million. See Note 19 to the Company's Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2025 for more information.

We provide guarantees related to some of our rail and pipeline service agreements. As of March 31, 2026 and December 31, 2025, if we do not meet our contractual obligations under the terms of these agreements we would be required to pay up to a maximum of $52.0 million.

**B. Legal Proceedings.** From time to time, various legal and regulatory claims and proceedings are pending or threatened against the Company and its subsidiaries. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company establishes reserves whenever it believes it to be appropriate for pending litigation matters. However, the actual results of resolving the pending litigation matters may be substantially higher than the amounts reserved. If one or more matters were decided against us, the effects could be material to our results of operations in the period in which we would be required to record or adjust the related liability and could also be material to our cash flows in the periods that we would be required to pay such liability. Due to the inherent uncertainty of litigation, there can be no assurance that the resolution of any particular claim, proceeding or investigation would not have a material adverse effect on our results of operations, financial position or liquidity.

***Other Claims and Proceedings.*** We are also party to other claims, regulatory and legal proceedings arising in the ordinary course of business in each state in which we have operations, and based upon an investigation of these matters and discussion with legal counsel, we believe the ultimate outcome of such other legal proceedings to be individually, or in aggregate, not material at this time.

**C. Environmental Matters.** Our operations are subject to environmental statutes and regulations related to air quality, water quality, hazardous waste and solid waste. We believe that we are in substantial compliance with the environmental regulations currently applicable to our operations.

It is management's continued intent to address environmental issues in cooperation with regulatory authorities in such a manner as to achieve mutually acceptable compliance plans. However, there can be no assurance that fines and penalties will not be incurred. Management expects a majority of environmental assessment and remediation costs and asset retirement costs, further described below, to be recoverable through rates.

As of March 31, 2026 and December 31, 2025, we had recorded a liability of $81.4 million and $82.6 million, respectively, to cover environmental remediation at various sites. This liability is included in "Other accruals" and "Other noncurrent liabilities and deferred credits" in the Condensed Consolidated Balance Sheets (unaudited). We recognize costs associated with environmental remediation obligations when the incurrence of such costs is probable and the amounts can be reasonably estimated. The original estimates for remediation activities may differ materially from the amount ultimately expended. The actual future expenditures depend on many factors, including laws and regulations, the nature and extent of impact and the method of remediation. These expenditures are not currently estimable at some sites. We periodically adjust our liability as information is collected and estimates become more refined.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

***CERCLA.*** Our subsidiaries are potentially responsible parties at waste disposal sites under CERCLA and similar state laws. Under CERCLA, each potentially responsible party can be held jointly, severally and strictly liable for the remediation costs as the EPA, or state, can allow the parties to pay for remedial action or perform remedial action themselves and request reimbursement from the potentially responsible parties. Our affiliates have retained CERCLA environmental liabilities, including remediation liabilities, associated with certain current and former operations. At this time, we cannot estimate the full cost of remediating properties that have not yet been investigated, but it is possible that the future costs could be material to the Condensed Consolidated Financial Statements (unaudited).

***MGP.*** We maintain a program to identify and investigate former MGP sites where our subsidiaries or predecessors may have liability. The program has identified 41 such sites where liability is probable. Remedial actions at many of these sites are being overseen by state or federal environmental agencies through consent agreements or voluntary remediation agreements.

We utilize a probabilistic model to estimate our future remediation costs related to MGP sites. The model was prepared with the assistance of a third party and incorporates our experience and general industry experience with remediating MGP sites. We perform an annual update of the model in the second quarter each year. Our total estimated liability related to the facilities subject to remediation was $74.3 million and $75.5 million at March 31, 2026 and December 31, 2025, respectively. The liability represents our best estimate of the probable cost to remediate the MGP sites. Remediation costs are estimated based on the best available information, applicable remediation standards at the balance sheet date and experience with similar facilities.

***CCRs.*** NIPSCO continues to meet the compliance requirements established by the EPA for the regulation of CCRs. The CCR rule requirements currently in effect required revisions to previously recorded legal obligations associated with the retirement of certain NIPSCO facilities. The actual asset retirement costs related to the CCR rule may vary substantially from the estimates used to record the increased asset retirement obligation due to the uncertainty about the requirements that will be established by environmental authorities, compliance strategies that will be used, and the preliminary nature of available data used to estimate costs. As allowed by the rule, NIPSCO will continue to collect data over time to determine the specific compliance solutions and associated costs and, as a result, the actual costs may vary.

In May 2024, the EPA finalized changes to the current CCR regulations ("Legacy CCR Rule"), which address inactive surface impoundments at inactive facilities, referred to as legacy impoundments, and CCR management units ("CCRMUs") at inactive and active facilities. The rule largely requires these newly regulated units to conform to existing requirements, such as groundwater monitoring, closure requirements, and post-closure care. NIPSCO continues to assess whether existing legal obligations associated with the retirement of certain facilities must be revised and to estimate probable additional required asset retirement costs. NIPSCO expects to receive recovery of any such costs through existing and future depreciation rates.

**D. Other Matters.** 

***EPC Agreements.*** GenCo has entered into certain EPC contracts to construct generation capacity assets to support our data center strategy, requiring payments at specified periods. The assets contemplated by these contracts are subject to IURC approval. We may terminate for convenience the EPC Contracts and pay certain incurred project costs and termination fees if, for example, the ADS Contract is terminated or IURC approval of the underlying assets is not obtained.

***Pool Resource Asset Agreements.*** During the first quarter of 2026, GenCo executed two fixed price ESA contracts to support the contracted customer demand, which are contingent on regulatory approval (such approval being the responsibility of the respective developers). GenCo has committed approximately $658.7 million under these ESAs over 15 years; however, GenCo has exercised an option and intends to convert one of these ESAs, which relates to a battery storage project (the "Tipton BESS Project") with 167 MW nameplate capacity and expected to be completed in 2028, to a BTA (the "Tipton BTA").

GenCo also entered into a battery e-storage supply agreement of which approximately $122.7 million is considered a noncancelable commitment as of March 31, 2026. We have provided a guarantee related to this agreement that would require us to pay up to a maximum of $350.6 million.

In addition, during the first quarter of 2026, NIPSCO entered into market capacity purchase agreements to secure additional capacity for the period 2028 through 2030 for approximately $174.6 million to support the contracted demand load of its data center customers. Subsequent to March 31, 2026, GenCo entered into a capacity agreement for the period from 2028 through 2040 for approximately $1.1 billion, also to support the contracted demand load of its data center customers. This agreement is subject to regulatory approval.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

**14.&nbsp;&nbsp;&nbsp;&nbsp;Accumulated Other Comprehensive Loss**

The following tables display the components of Accumulated Other Comprehensive Loss, net of tax:

---

| | | | | |
|:---|:---|:---|:---|:---|
| *(in millions)* | **Gains and Losses on Securities**<sup>(1)</sup> | **Gains and Losses on Cash Flow Hedges**<sup>(1)</sup> | **Pension and OPEB Items**<sup>(1)</sup> | **Accumulated<br>Other<br>Comprehensive<br>Loss**<sup>(1)</sup> |
| Balance as of December 31, 2025 | $0.1 | $(13.6) | $7.3 | $(6.2) |
| &nbsp;&nbsp;&nbsp;Other comprehensive income before reclassifications | (1.2) | 0.1 | (1.9) | (3.0) |
| &nbsp;&nbsp;&nbsp;Amounts reclassified from accumulated other comprehensive loss |  | (0.2) | 0.2 |  |
| Net current-period other comprehensive income (loss) | (1.2) | (0.1) | (1.7) | (3.0) |
| **Balance as of March 31, 2026** | $**(1.1)** | $**(13.7)** | $**5.6** | $**(9.2)** |
| <sup>(1)</sup>All amounts are net of tax. Amounts in parentheses indicate debits. |  |  |  |  |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
| *(in millions)* | Gains and Losses on Securities<sup>(1)</sup> | Gains and Losses on Cash Flow Hedges<sup>(1)</sup> | Pension and OPEB Items<sup>(1)</sup> | Accumulated<br>Other<br>Comprehensive<br>Loss<sup>(1)</sup> |
| Balance as of December 31, 2024 | $(4.0) | $(13.2) | $(13.2) | $(30.4) |
| &nbsp;&nbsp;&nbsp;Other comprehensive income before reclassifications | 0.8 |  | 0.3 | 1.1 |
| &nbsp;&nbsp;&nbsp;Amounts reclassified from accumulated other comprehensive loss |  | (0.1) | 0.2 | 0.1 |
| Net current-period other comprehensive income (loss) | 0.8 | (0.1) | 0.5 | 1.2 |
| Balance as of March 31, 2025 | $(3.2) | $(13.3) | $(12.7) | $(29.2) |
| <sup>(1)</sup>All amounts are net of tax. Amounts in parentheses indicate debits. |  |  |  |  |

---

**15.&nbsp;&nbsp;&nbsp;&nbsp;Business Segment Information**

Our reportable segments reflect the manner in which our business is managed and our resources are allocated. Our operations are divided into two primary reportable segments, the Columbia Operations and the NIPSCO Operations segments. Columbia Operations aggregates the results of the fully regulated and wholly owned subsidiaries of NiSource Gas Distribution Group, Inc. (a holding company that owns Columbia of Kentucky, Columbia of Maryland, Columbia of Ohio, Columbia of Pennsylvania, and Columbia of Virginia). Each Columbia distribution company is an operating segment which we aggregate to form the Columbia Operations reportable segment. NIPSCO Operations includes the results of NIPSCO Holdings I and its majority-owned subsidiaries, including NIPSCO, which has regulated gas and electric operations in northern Indiana.

The remainder of our operations, which are not significant enough on a stand-alone basis to warrant treatment as a reportable segment, are presented as "Corporate and Other" and primarily are comprised of interest expense on holding company debt and unallocated corporate costs and activities, as well as new business development costs associated with GenCo. Refer to Note 3, "Revenue Recognition," for additional information on our segments and their sources of revenues. The following table provides information about our reportable segments. We use operating income as the primary measurement of performance for each of the reportable segments and make decisions on financing, dividends and taxes at the corporate level on a consolidated basis. We provide this measure to our CODM, the CEO, who utilizes it to assess performance and allocation of resources at the operating segment level based on budget-to-actual and actual-to-actual variances. Segment revenues include intersegment sales to affiliated subsidiaries, which are eliminated in consolidation. Affiliated sales are recognized on the basis of prevailing market, regulated prices or at levels provided for under contractual agreements. Operating income is derived from revenues and expenses directly associated with each segment.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

---

| | | | |
|:---|:---|:---|:---|
| **Three Months Ended March 31, 2026** | **Three Months Ended March 31, 2026** | **Three Months Ended March 31, 2026** | **Three Months Ended March 31, 2026** |
| *(in millions)* | **Columbia Operations** | **NIPSCO Operations** | **Total of Reportable Segments** |
| **Operating Revenues** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;External Revenue | $1323.2 | $1038.5 | $2361.7 |
| &nbsp;&nbsp;&nbsp;&nbsp;Intersegment Revenue | 3.4 | 0.3 | 3.7 |
| **Total Operating Revenue** | $**1326.6** | $**1038.8** | $**2365.4** |
| &nbsp;&nbsp;&nbsp;&nbsp;Cost of energy | 383.9 | 285.3 | 669.2 |
| &nbsp;&nbsp;&nbsp;&nbsp;O&M | 278.4 | 221.4 | 499.8 |
| &nbsp;&nbsp;&nbsp;&nbsp;Depreciation | 120.9 | 162.7 | 283.6 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total other taxes | 71.1 | 20.9 | 92.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Operating Income** | $**472.3** | $**348.5** | $**820.8** |

---

---

| | | | |
|:---|:---|:---|:---|
| Three Months Ended March 31, 2025 | Three Months Ended March 31, 2025 | Three Months Ended March 31, 2025 | Three Months Ended March 31, 2025 |
| *(in millions)* | Columbia Operations | NIPSCO Operations | Total of Reportable Segments |
| Operating Revenues |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;External Revenue | $1240.6 | $941.4 | $2182.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;Intersegment Revenue | 3.2 | 0.3 | 3.5 |
| Total Operating Revenue | 1243.8 | 941.7 | 2185.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;Cost of energy | 379.8 | 267.7 | 647.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;O&M | 243.0 | 202.0 | 445.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;Depreciation | 108.2 | 141.3 | 249.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total other taxes | 67.0 | 18.5 | 85.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;Other segment items<sup>(1)</sup> |  | 0.3 | 0.3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Operating Income | $445.8 | $311.9 | $757.7 |

---

<sup>(1)</sup> Other segment items consists of Loss on Sale or Impairment of Assets and other segment income or expenses deemed insignificant which are used to reach our measurement of segment profit or loss, Operating Income.

The following table provides information about the assets of our reportable segments included in the Condensed Consolidated Balance Sheets (unaudited):

---

| | | |
|:---|:---|:---|
| *(in millions)* | **March 31,<br>2026** | December 31,<br>2025 |
| **Assets** |  |  |
| Columbia Operations | $**16184.4** | $15903.7 |
| NIPSCO Operations | **18541.4** | 18126.7 |
| Corporate and Other | **1875.2** | 1828.3 |
| **Consolidated Assets** | $**36601.0** | $35858.7 |

---

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

To reconcile the segment tables above to consolidated NiSource:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Three Months Ended March 31, 2026** | **Three Months Ended March 31, 2026** | **Three Months Ended March 31, 2026** | **Three Months Ended March 31, 2026** | **Three Months Ended March 31, 2026** |
| *(in millions)* | **Total Reportable Segments** | **Corporate and Other** | **Eliminations** | **Consolidated NiSource** |
| **Total Operating Revenue** | $2365.4 | $147.3 | $(149.6) | $**2363.1** |
| **Operating Income (Loss)** | 820.8 | (1.6) |  | **819.2** |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
| Three Months Ended March 31, 2025 | Three Months Ended March 31, 2025 | Three Months Ended March 31, 2025 | Three Months Ended March 31, 2025 | Three Months Ended March 31, 2025 |
| *(in millions)* | Total Reportable Segments | Corporate and Other | Eliminations | Consolidated NiSource |
| Total Operating Revenue | $2185.5 | $145.4 | $(147.7) | $2183.2 |
| Operating Income | 757.7 | 1.7 |  | 759.4 |

---

**16.&nbsp;&nbsp;&nbsp;&nbsp; Other, Net**

The following table displays the components of Other, Net included on the Condensed Statements of Consolidated Income (unaudited):

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
|<br>*(in millions)* | **2026** | 2025 |
| Interest income | $**4.7** | $2.0 |
| AFUDC equity | **9.8** | 9.2 |
| Pension and other postretirement non-service benefit (cost) | **2.2** | (3.8) |
| Miscellaneous  | **(2.3)** | (1.6) |
| Total Other, net | $**14.4** | $5.8 |

---

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 1. FINANCIAL STATEMENTS (continued)</u>

**NiSource Inc.**

**Notes to Condensed Consolidated Financial Statements (unaudited) (continued)**

**17.&nbsp;&nbsp;&nbsp;&nbsp; Supplemental Disclosures of Cash Flow Information**

The following table displays the components of Working Capital on the Condensed Statements of Consolidated Cash Flows (unaudited):

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
|<br>*(in millions)* | **2026** | 2025 |
| Accounts receivable | $**(51.1)** | $(141.5) |
| Income tax receivable | **7.9** |  |
| Gas storage and other inventories | **146.1** | 127.7 |
| Accounts payable | **(174.0)** | (59.3) |
| Customer deposits and credits | **(135.3)** | (125.6) |
| Taxes accrued | **12.5** | 34.2 |
| Interest accrued  | **12.5** | (14.8) |
| Exchange gas receivable/payable | **(246.8)** | 40.9 |
| Other accruals | **16.9** | 28.6 |
| Prepayments and other current assets | **(64.4)** | (20.0) |
| Accrued compensation and employee benefits | **(55.8)** | (75.5) |
| Total change in working capital  | $**(531.5)** | $(205.3) |

---

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
|<br>*(in millions)* | **2026** | 2025 |
| Non-cash transactions: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Capital expenditures included in current liabilities | $**484.6** | $394.2 |
| &nbsp;&nbsp;&nbsp;&nbsp;Advance deposits transferred to capital expenditures | **108.5** |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Dividends declared but not paid | **147.4** | 134.4 |

---

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS</u>

**NiSource Inc.**

---

| | |
|:---|:---|
| **Index** | **Page** |
| <u>[Executive Summary](#i91125c193fdf4e98980eeb4e396aea15_121)</u> | <u>[37](#i91125c193fdf4e98980eeb4e396aea15_121)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[Summary of Consolidated Financial Results](#i91125c193fdf4e98980eeb4e396aea15_124)</u> | <u>[40](#i91125c193fdf4e98980eeb4e396aea15_127)</u> |
| <u>[Results and Discussion of Segment Operations](#i91125c193fdf4e98980eeb4e396aea15_130)</u> | <u>[41](#i91125c193fdf4e98980eeb4e396aea15_130)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[Columbia Operations](#i91125c193fdf4e98980eeb4e396aea15_133)</u> | <u>[42](#i91125c193fdf4e98980eeb4e396aea15_133)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>[NIPSCO Operations](#i91125c193fdf4e98980eeb4e396aea15_136)</u> | <u>[45](#i91125c193fdf4e98980eeb4e396aea15_136)</u> |
| <u>[Liquidity and Capital Resources](#i91125c193fdf4e98980eeb4e396aea15_139)</u> | <u>[49](#i91125c193fdf4e98980eeb4e396aea15_139)</u> |
| <u>[Regulatory, Environmental and Safety Matters](#i91125c193fdf4e98980eeb4e396aea15_154)</u> | <u>[54](#i91125c193fdf4e98980eeb4e396aea15_154)</u> |
| <u>[Market Risk Disclosures](#i91125c193fdf4e98980eeb4e396aea15_163)</u> | <u>[56](#i91125c193fdf4e98980eeb4e396aea15_163)</u> |
| <u>[Other Information](#i91125c193fdf4e98980eeb4e396aea15_166)</u> | <u>[57](#i91125c193fdf4e98980eeb4e396aea15_166)</u> |

---

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**EXECUTIVE SUMMARY**

This Management's Discussion and Analysis of Financial Condition and Results of Operations ("Management's Discussion") includes management's analysis of past financial results and certain potential factors that may affect future results, potential future risks and approaches that may be used to manage those risks. See "Note regarding forward-looking statements" at the beginning of this report for a list of factors that may cause results to differ materially.

Management's Discussion is designed to provide an understanding of our operations and financial performance and should be read in conjunction with our Condensed Consolidated Financial Statements (unaudited) included in this report and our Annual Report on Form 10-K for the fiscal year ended December 31, 2025.

We are an energy holding company under the Public Utility Holding Company Act of 2005 whose primary subsidiaries are fully regulated natural gas and electric utility companies serving customers in six states. We generate substantially all of our operating income through these rate-regulated businesses, which are summarized for financial reporting purposes into two primary reportable segments: Columbia Operations and NIPSCO Operations. Refer to ''Note 15, "Business Segment Information," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for further discussion of our business segments.

Our vision is to be a premier, innovative and trusted energy partner. We exist to deliver safe, reliable and competitive energy that drives value to our customers. In order to achieve this goal, we seek to develop strategies that benefit all stakeholders as we (i) support long-term infrastructure investment and safety programs to better serve our customers, (ii) align our tariff structures and regulatory programs with our cost structure, and (iii) create value and enable growth in an evolving energy ecosystem. These strategies focus on improving safety and reliability, enhancing customer experience, pursuing regulatory and legislative initiatives to increase accessibility for customers currently not on our gas and electric service, ensuring customer value and reducing emissions while generating sustainable returns. The safety of our customers, communities and employees remains our focus. Serving as a guiding practice for our SMS, NiSource is certified in conformance to the American Petroleum Institute Recommended Practice 1173, which is the foundation to our journey towards operational excellence.

**Data Center Contracts and Strategy:** NIPSCO recently entered into a data center contract with a new customer and entered into amendments to its ADS Contract. Set forth below is a discussion of recent developments relating to our data center contracts and strategy. This discussion is supplemental to, and should be read in conjunction with, our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, in particular Part I, Item 1A, "Risk Factors—Data Center Operations and Strategy Risk" and Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations—Executive Summary—ADS Contract and Data Center Strategy."

*Alphabet Contract*

In March 2026, NIPSCO entered into an agreement with a wholly owned subsidiary of Alphabet, under which NIPSCO will provide electricity to the subsidiary's data center(the "Alphabet Contract"). Under the Alphabet Contract, which is pending IURC approval, NIPSCO will provide service to Alphabet's subsidiary pursuant to a capacity commitment beginning in summer 2026 and increasing to 300 MW commencing in 2030. The initial term of the Alphabet Contract is 15 years. Prior to receipt of applicable regulatory approvals from the IURC and FERC, NIPSCO will bill the customer for electric service under its base tariff. Following receipt of regulatory approvals, the customer will pay monthly capacity charges that are based on negotiated rates and actual consumption (subject to certain minimums), together with certain pass-through charges and an existing system charge which will be used to pass savings back to existing customers. The amounts we are entitled to receive from the customer are subject to adjustments including but not limited to resulting from tariff events or MISO accreditation changes. The customer's parent will provide credit support for the customer's payment obligations. Either party may terminate the Alphabet Contract upon certain defaults or failure to obtain necessary related approvals from the IURC and FERC. The Alphabet Contract contains other termination provisions which may be exercised following certain notice periods. If the customer terminates the Alphabet Contract, it is required to make certain termination payments that we believe will be sufficient to reimburse us for our investment costs and NIPSCO has certain obligations to mitigate.

The customer's electricity supply under the Alphabet Contract will be provided through a portfolio of electric generation assets and related assets owned or contracted for by NIPSCO and/or its affiliates (primarily including GenCo) and designed to serve the needs of the customer under the Alphabet Contract and other data center customers (the "Pool Resource Assets"). See "Data Center Strategy & Pool Resource Assets" below for additional information on the Pool Resource Assets. NIPSCO has entered into a PPA with GenCo in connection with the Alphabet Contract, which is pending IURC approval.

------

**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

*Amendments to ADS Contract*

In March 2026, NIPSCO entered into an amendment to its ADS Contract to accelerate the delivery of capacity to ADS, resulting in increased committed capacity in the years 2027 through 2031. The amendment does not increase NIPSCO's 2,400 MW maximum capacity commitment to ADS under the original ADS Contract but increases the amounts of power to be delivered before the maximum commitment is reached. The amendment is pending IURC approval. Pursuant to the amendment, ADS will regularly pay NIPSCO a fixed capacity charge (not subject to adjustment) from 2027 through 2031, regardless of any termination of the ADS Contract or reduction of capacity. The payment structure under this amendment is distinct from and does not alter the payment structure or the payments NIPSCO will receive under the original ADS Contract. Demand under this amendment is expected to be served through Pool Resource Assets (rather than Contract Assets under the ADS Contract).

In addition, in March and May of 2026, NIPSCO entered into amendments to the ADS Contract, subject to IURC and FERC approval, to increase the committed capacity that NIPSCO will provide beginning in 2029 and increasing to a total capacity commitment of 2,800 MW by the end of 2032 and through the end of the initial term of the ADS Contract. ADS will pay NIPSCO both a fixed capacity charge and an existing system charge designed to pass savings back to existing customers, for the increased capacity. Demand under these amendments is expected to be served through Pool Resource Assets (rather than Contract Assets under the ADS Contract).

*Construction Update*

GenCo continues to advance development of its new combined-cycle natural gas-fired generation facility to support the ADS Contract. During the period, the EPC contractor progressed engineering, procurement, and planning activities in support of construction mobilization currently anticipated in mid-2026. The equipment supply contract for the CCGT units is progressing in accordance with planned delivery schedules.

GenCo is also advancing the development of a combined 400 MW and 100MW BESS installation. The battery equipment supply contract was awarded in February 2026, and the EPC contractor continues engineering, procurement, and planning activities to support the anticipated start of on-site construction in mid-2026.

*Data Center Strategy & Pool Resource Assets*

We continue to experience strong demand from potential data center customers in our northern Indiana service territory and are engaged in negotiations with potential additional counterparties. Agreements we enter into with additional counterparties will be served by means of customized, dedicated generation assets, Pool Resource Assets, or a combination.

With respect to customers to be served by Pool Resource Assets, NIPSCO will retain discretion to select and dispatch Pool Resource Assets to meet committed customer demand in a way that maintains reliability and efficiency without direct involvement or approval from specific customers. We believe this model will enable us to allocate generation resources more efficiently and provide us with greater flexibility to serve a broader range of potential customers.

We evaluate potential transactions with Pool Resource Asset customers in the context of existing demand and resources within the pool in order to promote a sustainable alignment between committed customer demand within the pool and capacity available from Pool Resource Assets. We will add capacity resources to the Pool Resource Assets to maintain resource adequacy requirements and promote efficient resource utilization based on contracts with customers (subject to IURC approval). We anticipate that the total accredited capacity from the pool will be large enough to support the total load requirements of our data center customers taking into consideration MISO requirements. Pool Resource Assets may include generation assets that we develop or contract for (for example, via a BTA), as well as capacity agreements, ESAs, market capacity purchases or other similar agreements. In order to provide initial Pool Resource Assets to serve contracted demand, GenCo plans to construct new battery storage with 100MW nameplate capacity, which is expected to be completed in 2028, and has entered into a number of ESA contracts (including with respect to the Tipton BESS Project, which we intend to convert into a BTA) and other capacity purchase agreements. For more information on these agreements, see Note 13, "Other Commitments and Contingencies - D. Other Matters" – Pool Resource Asset Agreements." We expect that the capacity provided by these initial Pool Resource Assets will suffice to meet substantially all contracted demand from the second half of 2028 through the expiration of the initial terms of our existing data center contracts.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

Our ability to recover our investments and earn a return under our contracts with customers served by Pool Resource Assets will be driven by, among other factors, the terms of our contracts with these customers (including the charges we receive from customers and any potential adjustments to such charges), our ability to construct or procure sufficient Pool Resource Assets in a timely and cost-effective manner, and the performance by us and our customers under the contracts, rather than a traditional rate-making process.

Through certain of our subsidiaries, we have entered into certain construction and equipment supply contracts in relation to additional generation and transmission assets that may be used to serve potential future data center customers. As we continue to evaluate our potential data center opportunities, we will continue to focus on the community, financial, operational and regulatory factors that must be managed effectively in order to succeed with our data center strategy. We believe data center development can enhance our local tax base, diversify the employment base across the state of Indiana, and provide greater value to existing customers and shareholders. We continually evaluate ways to effectively manage the potential power demand, generation sources, and transmission capabilities to meet potential further load growth from additional data center customers, while at the same time focusing on our environmental goals.

In order to perform under any further data center contracts, we expect that we would need to develop additional generation and transmission assets, which may be significant, and obtain additional financing in connection with such development. For these and other reasons, our ability to successfully execute our data center strategy is subject to a number of risks and uncertainties. Refer to Part I, Item 1A, "Risk Factors" in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025.

**Energy Transition:** We continue to advance our energy transition strategy, primarily through the continuation and enhancement of existing programs, such as implementing our plan to retire and replace remaining coal-fired electric generation by 2028 with a balanced mix of low- or zero-emission electric generation, ongoing pipe replacement and modernization programs, and deployment of advanced leak detection and repair. We continue to make progress on our electric generation transition, initiated through our 2018 Plan, and we are continually adjusting to the dynamic energy landscape. Before the planned retirement of the R.M. Schahfer coal facility at the end of December 2025, NIPSCO received the first of successive emergency orders under section 202(c) of the Federal Power Act, to continue operating in 90-day increments, currently through June 21, 2026. The orders stated that continued operation of R.M. Schahfer is required to meet an energy emergency across MISO's North and Central regions. Consistent with the Federal Power Act and the U.S. Department of Energy regulations, the order authorizes NIPSCO to obtain cost recovery pursuant to 16 U.S.C. § 824a(c). For additional information, see Note 8, "Regulatory Matters," and see Part I, Item 1A. "Risk Factors" in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025.

NIPSCO's 2021 Plan calls for a new natural gas peaking facility to replace existing vintage gas peaking facilities at the R.M. Schahfer Generating Station to support system reliability and resiliency, and upgrades to the electric transmission system. Following approval by the IURC in October 2024, the construction of a new 400 MW natural gas peaking generation facility is underway, which is expected to support the planned retirement of the existing vintage gas peaking facilities by the end of 2028. The 2021 Plan affirms the retirement of the Michigan City Generating Station by 2028 and calls for new natural gas peaking facilities. Final retirement dates for these units will be subject to MISO approval.

NIPSCO's 2024 Plan was submitted to the IURC on December 9, 2024. The 2024 Plan maintains the retirement decisions and capacity additions identified in the 2018 and 2021 Integrated Resource Plans and calls for additional generation resources through 2029 to support capacity requirements. The 2024 Plan informs future generation investments required to ensure reliability for NIPSCO's customers and incorporates factors such as anticipated load growth from data centers and other economic development opportunities, EPA emissions rules, and evolving MISO resource accreditation rules. Given that the 90-day 202(c) order could continue to be issued every 90 days to keep R.M. Schahfer open for the foreseeable future, and given that MISO's resource accreditations for renewables and storage remain uncertain, it may be necessary to evaluate changes to our previously communicated resource timelines and alternative resource decisions. We plan to move as efficiently as possible while maintaining the integrity of our commercial, planning, regulatory, procurement and operational execution processes.

We continue to enhance safety and reduce methane emissions on our gas systems through modernization programs and utilization of advanced leak detection and repair. In addition, we plan to advance other low- or zero-emission energy resources and technologies, such as hydrogen and renewable natural gas.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**Transformation:** We are modernizing and unlocking efficiencies within our systems and processes on operational excellence, safety, operation and maintenance management. These efforts include investments in proven technologies backed with standardized processes that are changing the way we plan, schedule, and execute work in the field and how we engage and provide service to our customers. We continue to focus on our customer technology platforms. In addition to transforming technology to enhance our employee and customer experiences, we believe these programs will modernize systems and further reduce our enterprise risk related to end-of-life systems. During the first quarter, we also initiated a multi-year program, Value Captured, aimed at accelerating certain transformation activities in response to growing customer affordability concerns. This program is focused on operational efficiencies, evaluating target operating models and improving long-term scalability.

**NIPSCO Union Contract Negotiations:** On April 2, 2026, NIPSCO initiated a lockout of employees represented by the United Steelworkers following months of extensive negotiations to produce successor collective bargaining agreements by the contract expiration date of March 31, 2026. Agreements were reached and subsequently ratified by the physical and clerical bargaining units on April 24, 2026, and May 1, 2026, respectively, ending the lockout. During the lockout period, we incurred incremental costs to support our work continuity plans.

**Economic Environment:** We continue to monitor risks related to order and delivery lead times for construction and other materials, potential unavailability of materials due to global shortages in raw materials, and decreased construction labor productivity in the event of disruptions in the availability of materials. We continue to experience elevated material and supply costs in certain product sourcing categories driven by increased demand and tariffs. To the extent that work plan delays occur or our costs increase, our business operations, results of operations, cash flows, and financial condition could be materially adversely affected.

**Summary of Consolidated Financial Results** 

A summary of our consolidated financial results for the three months ended March 31, 2026 and 2025 are presented below:

---

| | | | |
|:---|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
|<br>*(in millions, except per share amounts)* | **2026** | 2025 | Favorable (Unfavorable) |
| **Operating Revenues** | $**2363.1** | $2183.2 | $179.9 |
| **Operating Expenses** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Cost of energy | **669.2** | 647.5 | (21.7) |
| &nbsp;&nbsp;&nbsp;&nbsp;Other Operating Expenses | **874.7** | 776.3 | (98.4) |
| **Total Operating Expenses** | **1543.9** | 1423.8 | (120.1) |
| **Operating Income** | **819.2** | 759.4 | 59.8 |
| Total Other Deductions, Net | **(177.2)** | (127.0) | (50.2) |
| Income Taxes | **85.8** | 105.7 | 19.9 |
| **Net Income** | **556.2** | 526.7 | 29.5 |
| Net income attributable to noncontrolling interest | **49.1** | 51.9 | 2.8 |
| **Net Income Attributable to NiSource** | **507.1** | 474.8 | 32.3 |
| Preferred dividends redemption premium | **3.6** |  | 3.6 |
| **Net Income Available to Common Shareholders** | **510.7** | 474.8 | 35.9 |
| **Earnings Per Share** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Basic Earnings Per Share | $**1.06** | $1.01 | $0.05 |
| &nbsp;&nbsp;&nbsp;&nbsp;Diluted Earnings Per Share | $**1.06** | $1.00 | $0.06 |

---

The majority of the costs of energy in both segments are tracked costs that are passed through directly to the customer, resulting in an equal and offsetting amount reflected in operating revenues.

The increase in net income available to common shareholders for the three months ended March 31, 2026 was primarily due to higher revenues associated with our capital investments, partially offset by higher operating expenses, including increased operation and maintenance expense and depreciation expense attributed to our net plant balances, as well as increased interest expense.

For additional information on operating income variance drivers see "Results and Discussion of Segment Operations" for Columbia Operations and NIPSCO Operations in this Management's Discussion.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

<u>Income Taxes</u>

Refer to Note 11, "Income Taxes," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for information on income taxes and the change in the effective tax rates for the periods presented.

**RESULTS AND DISCUSSION OF SEGMENT OPERATIONS**

<u>Presentation of Segment Information</u>

Columbia Operations aggregates the results of the fully regulated and wholly owned subsidiaries of NiSource Gas Distribution Group, Inc. Each Columbia distribution company is an operating segment which we aggregate to form the Columbia Operations reportable segment. NIPSCO Operations aggregates the results of NIPSCO Holdings I and its majority-owned subsidiaries, including NIPSCO, which has both fully regulated gas and electric operations in northern Indiana. The remainder of our operations, which are not significant enough on a stand-alone basis to warrant treatment as a reportable segment, are presented as "Corporate and Other" within the Notes to the Condensed Consolidated Financial Statements (unaudited) and primarily are comprised of interest expense on holding company debt, unallocated corporate costs and activities and new business development costs associated with GenCo.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**Columbia Operations**

Financial and operational data for the Columbia Operations segment for the three months ended March 31, 2026 and 2025 are presented below.

---

| | | | |
|:---|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
|<br>*(in millions)* | **2026** | 2025 | Favorable (Unfavorable) |
| **Operating Revenues** | $**1326.6** | $1243.8 | $82.8 |
| **Operating Expenses** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Cost of energy | **383.9** | 379.8 | (4.1) |
| &nbsp;&nbsp;&nbsp;&nbsp;Operation and maintenance | **278.4** | 243.0 | (35.4) |
| &nbsp;&nbsp;&nbsp;&nbsp;Depreciation and amortization | **120.9** | 108.2 | (12.7) |
| &nbsp;&nbsp;&nbsp;&nbsp;Other taxes | **71.1** | 67.0 | (4.1) |
| Total Operating Expenses | **854.3** | 798.0 | (56.3) |
| Operating Income | $**472.3** | $445.8 | $26.5 |
| **Revenues** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | $**907.5** | $858.0 | $49.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **333.2** | 308.1 | 25.1 |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **58.0** | 48.2 | 9.8 |
| &nbsp;&nbsp;&nbsp;&nbsp;Off-System | **16.8** | 22.3 | (5.5) |
| &nbsp;&nbsp;&nbsp;&nbsp;Wholesale and Other | **11.1** | 7.2 | 3.9 |
| Total | $**1326.6** | $1243.8 | $82.8 |
| **Sales and Transportation (MMDth)** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | **88.5** | 90.8 | (2.3) |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **60.8** | 61.9 | (1.1) |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **77.0** | 72.1 | 4.9 |
| &nbsp;&nbsp;&nbsp;&nbsp;Off-System | **4.4** | 5.9 | (1.5) |
| &nbsp;&nbsp;&nbsp;&nbsp;Wholesale and Other | **0.2** | 0.2 |  |
| Total | **230.9** | 230.9 |  |
| **Heating Degree Days**<sup>(1)</sup> | **2656** | 2670 | (14) |
| **Normal Heating Degree Days**<sup>(1)</sup> | **2636** | 2666 | (30) |
| **% Colder than Normal** | **1%** | —% |  |
| **% Warmer than prior year** | **(1)%** |  |  |
| **Columbia Operations Customers** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | **2244188** | 2233968 | 10220 |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **190714** | 189918 | 796 |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **1981** | 1988 | (7) |
| &nbsp;&nbsp;&nbsp;&nbsp;Other | **6** | 5 | 1 |
| Total | **2436889** | 2425879 | 11010 |

---

<sup>(1)</sup> Heating degree figures represent averages of the five jurisdictions served by Columbia Operations.

Comparability of operation and maintenance expenses, depreciation and amortization, and other taxes may be impacted by regulatory, depreciation, and tax trackers that allow for the recovery in rates of certain costs.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**Columbia Operations**

The underlying reasons for changes in our operating revenues for the three months ended March 31, 2026 compared to the same period in 2025 are presented below.

---

| | |
|:---|:---|
| | **Favorable (Unfavorable)** |
|<br>**Changes in Operating Revenues** *(in millions)* | **Three Months Ended March 31, 2026 vs 2025** |
| Rates from base rate proceedings and regulatory capital programs | $56.6 |
| The effects of customer growth | 1.2 |
| The effects of weather in 2026 compared to 2025, net of weather and revenue normalization mechanisms | (14.2) |
| Other | 4.5 |
| Change in operating revenues (before cost of energy and other tracked items) | $48.1 |
| **Operating revenues offset in operating expense** |  |
| Higher tracker deferrals within operation and maintenance, depreciation, and tax | 30.6 |
| Higher cost of energy billed to customers | 4.1 |
| **Total change in operating revenues** | $**82.8** |

---

<u>Weather</u>

In general, we calculate the weather-related revenue variance based on changing customer demand driven by weather variance from normal heating degree days, net of weather and revenue normalization mechanisms. Normal weather is aligned with the definitions used in base rates for each jurisdiction, which typically reflect a 20-year average for all operating companies, other than Columbia of Virginia, which uses a 30-year average. In certain circumstances, normal weather as defined in base rates may differ from the assumptions used in normalization mechanisms. Our composite heating degree days reported do not directly correlate to the weather-related dollar impact on the results of Columbia Operations. Heating degree days experienced during different times of the year or in different operating locations may have more or less impact on volume and dollars depending on when and where they occur. When the detailed results are combined for reporting, there may be weather-related dollar impacts on operations when there is not an apparent or significant change in our aggregated composite heating degree day comparison.

<u>Sales</u>

The change in volumes for the three months ended March 31, 2026 compared to 2025 was a result of decreased usage from residential customers offset by increases in residential and commercial customer count.

<u>Commodity Price Impact</u>

Cost of energy for the Columbia Operations segment is principally comprised of the cost of natural gas procured and transported on behalf of and sold to customers while providing distribution services, as well as the transportation and storage costs of acquiring natural gas. All of our Columbia Operations companies have state-approved recovery mechanisms that provide a means for full recovery of prudently incurred gas costs. These are tracked costs that are passed through directly to the customer, and the gas costs included in revenues are matched with the gas cost expense recorded in the period. Any difference in actual costs incurred and amounts billed to customers is recorded on the Condensed Consolidated Balance Sheets (unaudited) as under-recovered or over-recovered gas cost to be included in future customer billings. Therefore, increases in these tracked operating expenses are offset by increases in operating revenues and have essentially no impact on net income. Certain Columbia Operations companies continue to offer choice opportunities, where customers can choose to purchase gas from a third-party supplier through regulatory initiatives in their respective jurisdictions.

The underlying reasons for changes in our operating expenses for the three months ended March 31, 2026 compared to the same period in 2025 are presented below.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**Columbia Operations**

---

| | |
|:---|:---|
| | **Favorable (Unfavorable)** |
|<br>**Changes in Operating Expenses** *(in millions)* | **Three Months Ended March 31, 2026 vs 2025** |
| Higher depreciation and amortization expense | $(12.7) |
| Higher outside services expenses | (4.9) |
| Higher property tax | (2.3) |
| Other | (1.7) |
| Change in operating expenses (before cost of energy and other tracked items) | $(21.6) |
| **Operating expenses offset in operating revenue** |  |
| Higher tracker deferrals within operation and maintenance, depreciation, and tax | (30.6) |
| Higher cost of energy billed to customers | (4.1) |
| **Total change in operating expense** | $**(56.3)** |

---

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**NIPSCO Operations**

Financial and operational data for the NIPSCO Operations segment, which services both gas and electric customers, for the three months ended March 31, 2026 and 2025 are presented below.

---

| | | | |
|:---|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
|<br>*(in millions)* | **2026** | 2025 | Favorable (Unfavorable) |
| **NIPSCO Operations** |  |  |  |
| **Operating Revenues** | $**1038.8** | $941.7 | $97.1 |
| **Operating Expenses** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Cost of energy | **285.3** | 267.7 | (17.6) |
| &nbsp;&nbsp;&nbsp;&nbsp;Operation and maintenance | **221.4** | 202.0 | (19.4) |
| &nbsp;&nbsp;&nbsp;&nbsp;Depreciation and amortization | **162.7** | 141.3 | (21.4) |
| &nbsp;&nbsp;&nbsp;&nbsp;Loss on impairment of assets | **—** | 0.3 | 0.3 |
| &nbsp;&nbsp;&nbsp;&nbsp;Other taxes | **20.9** | 18.5 | (2.4) |
| Total Operating Expenses | **690.3** | 629.8 | (60.5) |
| Operating Income | $**348.5** | $311.9 | $36.6 |
|  | **Three Months Ended March 31,** | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| *(in millions)* | **2026** | 2025 | Favorable (Unfavorable) |
| **NIPSCO Electric** |  |  |  |
| **Revenues** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | $**178.4** | $167.9 | $10.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **173.6** | 160.1 | 13.5 |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **156.9** | 142.8 | 14.1 |
| &nbsp;&nbsp;&nbsp;&nbsp;Wholesale and Other | **43.2** | 30.4 | 12.8 |
| Total | $**552.1** | $501.2 | $50.9 |
| **Sales (GWh)** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | **786.4** | 810.4 | (24.0) |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **898.9** | 884.8 | 14.1 |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **2151.4** | 2136.0 | 15.4 |
| &nbsp;&nbsp;&nbsp;&nbsp;Wholesale and Other | **155.0** | 180.5 | (25.5) |
| Total | **3991.7** | 4011.7 | (20.0) |
| **NIPSCO Electric Customers** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | **434519** | 431351 | 3168 |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **59843** | 59286 | 557 |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **2107** | 2112 | (5) |
| &nbsp;&nbsp;&nbsp;&nbsp;Wholesale and Other | **702** | 707 | (5) |
| Total | **497171** | 493456 | 3715 |

---

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**NIPSCO Operations**

---

| | | | |
|:---|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
|<br>*(in millions)* | **2026** | 2025 | Favorable (Unfavorable) |
| **NIPSCO Gas** |  |  |  |
| **Revenues** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | $**330.0** | $298.7 | $31.3 |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **118.7** | 105.1 | 13.6 |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **34.1** | 31.4 | 2.7 |
| &nbsp;&nbsp;&nbsp;&nbsp;Other | **3.9** | 5.3 | (1.4) |
| Total | $**486.7** | $440.5 | $46.2 |
| **Sales and Transportation Volumes (MMDth)** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | **31.5** | 32.7 | (1.2) |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **19.5** | 20.3 | (0.8) |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **71.2** | 73.8 | (2.6) |
| Total | **122.2** | 126.8 | (4.6) |
| **Heating Degree Days** | **2917** | 3015 | (98) |
| **Normal Heating Degree Days** | **3049** | 3079 | (30) |
| **% Warmer than Normal** | **(4)%** | (2)% |  |
| **% Warmer than prior year** | **(3)%** |  |  |
| **NIPSCO Gas Customers** |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Residential | **809503** | 803206 | 6297 |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial | **67011** | 66699 | 312 |
| &nbsp;&nbsp;&nbsp;&nbsp;Industrial | **2665** | 2721 | (56) |
| Total | **879179** | 872626 | 6553 |

---

Comparability of operation and maintenance expenses and depreciation and amortization may be impacted by regulatory and depreciation trackers that allow for the recovery in rates of certain costs.

The underlying reasons for changes in our operating revenues for the three months ended March 31, 2026 compared to the same period in 2025 are presented below.

---

| | |
|:---|:---|
| | **Favorable (Unfavorable)** |
|<br>**Changes in Operating Revenues** *(in millions)* | **Three Months Ended March 31, 2026 vs 2025** |
| Rates from base rate proceedings, regulatory capital and DSM programs | $83.7 |
| The effects of customer growth | 4.0 |
| The effects of weather in 2026 compared to 2025, net of NIPSCO Gas' weather normalization mechanism | (7.9) |
| The effects of customer usage | (6.3) |
| Other | 1.9 |
| Change in operating revenues (before cost of energy and other tracked items) | $75.4 |
| **Operating revenues offset in operating expense** |  |
| Higher cost of energy billed to customers | 17.6 |
| Higher tracker deferrals within operation and maintenance, depreciation and tax | 4.1 |
| **Total change in operating revenues** | $**97.1** |

---

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**NIPSCO Operations**

<u>Weather</u>

The results of operations for the NIPSCO Operations segment include income from both electric and gas services. In general, we calculate the weather-related revenue variance based on changing customer demand driven by weather variance from normal cooling degree days and normal heating degree days, net of NIPSCO Gas' weather normalization mechanism. Our composite cooling and heating degree days reported do not directly correlate to the weather-related dollar impact on the results of NIPSCO Operations. Cooling and heating degree days experienced during different times of the year or in different operating locations may have more or less impact on volume and dollars depending on when they occur. When the detailed results are combined for reporting, there may be weather-related dollar impacts on operations when there is not an apparent or significant change in our aggregated composite cooling and heating degree day comparison.

<u>Sales</u>

The decrease in total volumes sold to electric customers for the three months ended March 31, 2026 compared to the same period in 2025 was primarily attributable to decreased residential and wholesale usage, partially offset by increased industrial and commercial usage, as well as increased residential and commercial customer count.

The decrease in total volumes sold to gas customers for the three months ended March 31, 2026 compared to the same period in 2025 was primarily attributable to decreased usage by residential customers due to warmer weather, as well as decreased usage from industrial and commercial customers, partially offset by increases in residential and commercial customer count.

<u>Commodity Price Impact</u>

Cost of energy for the NIPSCO Operations segment's electric activities is principally comprised of the cost of coal, natural gas purchased for internal generation of electricity, transportation of coal and natural gas, and the cost of power purchased from generators of electricity for its generation and transmission activities. For its gas distribution activities, NIPSCO Operations' cost of energy is principally comprised of the cost of natural gas procured and transported on behalf of and sold to customers while providing distribution services, as well as the transportation and storage costs of acquiring natural gas. NIPSCO Operations has state-approved recovery mechanisms that provide a means for full recovery of prudently incurred costs of energy. The majority of these costs of energy are passed through directly to the customer, and the costs of energy included in operating revenues are matched with the cost of energy expense recorded in the period. Any difference in actual costs incurred and amounts billed to customers is recorded on the Condensed Consolidated Balance Sheets (unaudited) as under-recovered or over-recovered fuel and gas costs to be included in future customer billings. Therefore, increases in these tracked operating expenses are offset by increases in operating revenues and have essentially no impact on net income.

The underlying reasons for changes in our operating expenses for the three months ended March 31, 2026 compared to the same period in 2025 are presented below.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**NIPSCO Operations**

---

| | |
|:---|:---|
| | **Favorable (Unfavorable)** |
|<br>**Changes in Operating Expenses** *(in millions)* | **Three Months Ended March 31, 2026 vs 2025** |
| Higher depreciation and amortization expense driven by new base rates | $(20.7) |
| Higher outside services expenses | (4.6) |
| Higher materials and supplies expenses | (3.2) |
| Higher bad debt expense | (2.7) |
| Higher property taxes | (2.6) |
| Other | (5.0) |
| Change in operating expenses (before cost of energy and other tracked items) | $(38.8) |
| **Operating expenses offset in operating revenue** |  |
| Higher cost of energy billed to customers | (17.6) |
| Higher tracker deferrals within operation and maintenance, depreciation and tax | (4.1) |
| **Total change in operating expense** | $**(60.5)** |

---

<u>Electric Supply and Generation Transition</u>

NIPSCO continues to execute on an electric generation transition consistent with the 2018 Plan and 2021 Plan and maintained in the 2024 Plan. Before the planned retirement of the R.M. Schahfer coal facility at the end of December 2025, NIPSCO received the first of successive emergency orders under section 202(c) of the Federal Power Act, to continue operating in 90-day increments, currently through June 21, 2026. The orders stated that continued operation of R.M. Schahfer is required to meet an energy emergency across MISO's North and Central regions. Consistent with the Federal Power Act and the U.S. Department of Energy regulations, the order authorizes NIPSCO to obtain cost recovery pursuant to 16 U.S.C. § 824a(c). As directed, NIPSCO continued to make R.M. Schahfer available in the MISO market. We had forced outages on units 17 and 18 to support ongoing compliance with the 202(c) orders, during the period ended March 31, 2026. Following receipt of the emergency order, NIPSCO filed a complaint at FERC seeking a modification of the MISO tariff to establish a mechanism for recovery and allocation of the cost to comply with this order. NIPSCO made two filings with the IURC related to the emergency order. The first filing is to confirm accounting treatment of current electric rate order, and the second is a filing for recovery of federally mandated expenses related to the emergency order, which will be utilized in the event that any costs of complying with the emergency order fall outside of the MISO tariff recovery. For additional information, see Note 8, Regulatory Matters.

NIPSCO has one remaining project under the 2021 plan still under development. We expect the Templeton project, a wind BTA project with nameplate capacity of 200 MW, to be placed in service in 2027. See "Executive Summary - Energy Transition" in this Management's Discussion for additional information. NIPSCO has sold, and may in the future sell, renewable energy credits from its renewable generation to third parties to offset customer costs.

In March 2026, we experienced damage to our solar generation facilities at Dunn's Bridge I due to an extreme weather event. Based on preliminary estimates of the damages, we expect most, if not all, of the total loss will be covered by insurance proceeds less the applicable deductible.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**Liquidity and Capital Resources**

We continually evaluate the availability of adequate financing to fund our ongoing business operations, working capital and core safety and infrastructure investment programs. Our financing is sourced through cash flow from operations, the issuance of debt and/or equity, and minority interest investments. Equity issuances are primarily conducted through our ATM program. Additionally, we received proceeds from tax credit transfers related to previously and currently monetized credits, which are returned to customers over a ten-year period for investment tax credits and a one-year period for production tax credits. External debt financing is provided primarily through the issuance of long-term debt, accounts receivable securitization programs and our commercial paper program, which is backstopped by our committed revolving credit facility. In March 2026, we increased our commercial paper program limit from $1.85 billion to $2.50 billion. We believe these sources provide adequate capital to fund operating activities and capital expenditures for our base business (i.e., excluding operations and capital expenditures related to serving data center customers) in 2026 and beyond.

The aggregate cost of Contract Assets and Pool Resource Assets supporting our existing data center customers is currently estimated to be between $9.25 to $9.75 billion. We expect to finance the construction and development of these assets and purchases of market capacity through a number of sources including but not limited to funds received under our data center contracts, debt, and equity financing raised by NiSource and capital contributions from affiliates of Blackstone to NIPSCO Holdings II and Generation Holdings II in connection with such Blackstone affiliates' minority interest investments in those entities. For additional information on these minority interest investments, refer to Note 4, "Noncontrolling Interests," and Note 19, "Other Commitments and Contingencies - E. Other Matters," in our Annual Report on Form 10-K for the year ended December 31, 2025. If we enter into additional data center contracts, we expect that we would need to develop additional generation assets to serve our new data center customers. In order to fund the development of these assets, which may be significant, we would be required to obtain significant additional financing, for which we may consider other funding sources, structures, or partnerships, which may include JVs, off-balance sheet arrangements in the form of BTAs, or other arrangements to support maintenance of our investment grade credit ratings.

Sources of financing activities for the current year are as follows:

Details of our ATM program activity are summarized below:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• In February 2026, we executed a forward sale agreement, which allows us to issue a fixed number of shares at a price to be settled in the future. The forward purchaser under our forward sale agreement borrowed 2,200,000 shares from third parties, which the forward purchaser sold, through its affiliated agent, at a weighted average price of $45.63 per share. We may settle the forward sale agreement in shares, cash or net shares by December 2026.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• As of March 31, 2026, the ATM program inclusive of the outstanding forward sale agreements had approximately $1.25 billion of equity capacity available. The ATM program expires in December 2028.

See Note 6, "Equity," Note 7, "Short-Term Borrowings," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for more information on our financing activities.

**Cash Flow Activities** 

The following table summarizes our cash flow activities:

---

| | | | |
|:---|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
|<br>*(in millions)* | **2026** | 2025 | Change in 2026 vs 2025 |
| **Cash from (used for):** |  |  |  |
| &nbsp;&nbsp;Operating Activities | $**442.3** | $686.4 | $(244.1) |
| &nbsp;&nbsp;Investing Activities | **(872.6)** | (1352.7) | 480.1 |
| &nbsp;&nbsp;Financing Activities | $**391.7** | $771.4 | $(379.7) |

---

<u>Operating Activities</u>

The year over year decrease in cash from operating activities was primarily attributable to changes in exchange gas receivables, accounts payable and prepayments as well as a change in inventory. These impacts were partially offset by higher net income, change in accounts receivable, and depreciation.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

<u>Investing Activities</u>

The year over year decrease in investing activities was primarily driven by prior year milestone payments to renewable generation asset developers for certain of our BTA projects and prior year advanced deposits offset by current year capital expenditures.

We expect to make capital investments of approximately $600 million in connection with Pool Resource Assets initially being developed in connection with contracted demand from data center customers. These capital expenditures are incremental to the estimates of capital investments relating to data center contracts described in our Annual Report on Form 10-K for the year ended December 31, 2025 and are included in the forecasted capital investment table below.

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| *(in billions)* | **2026**<br>**Estimated** | **2027**<br>**Estimated** | **2028**<br>**Estimated** | **2029**<br>**Estimated** | **2030**<br>**Estimated** |
| Capital Investments (Base Business) | $3.9 - 4.1 | $3.7 - 3.9 | $3.7 - 3.9 | $4.9 - 5.1 | $4.3 - 4.5 |
| Capital Investments (GenCo) | 1.3 - 1.5 | 1.6 - 1.8 | 2.2- 2.4 | 1.0 - 1.2 | 0.4 - 0.6 |
| Capital Investments (Total) | $5.2 - 5.6 | $5.3 - 5.7 | $5.9 - 6.3 | $5.9 - 6.3 | $4.7 - 5.1 |

---

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

***Regulatory Capital Programs.*** We continue to upgrade and modernize our electric system to enhance safety and reliability by addressing aged infrastructure and deploying advanced grid technologies. We are also upgrading and modernizing our gas infrastructure to enhance safety and reliability by reducing leaks. An ancillary benefit of these programs is the reduction of GHG emissions. In 2026, we continue to move forward on core infrastructure investment programs supported by complementary regulatory and customer initiatives across five states of our operating area.

The following table describes the most recent vintage of our regulatory programs to recover infrastructure replacement and other federally mandated compliance investments:

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| *(in millions)* | | | | | |
| Company | Program | Capital Investment | Investment Period | Filing Date | Costs Covered<sup>(1)</sup> |
| **<u>Approved</u>** | **<u>Approved</u>** | **<u>Approved</u>** | **<u>Approved</u>** | **<u>Approved</u>** | **<u>Approved</u>** |
| Columbia of Ohio | CEP - 2025 | $1027.8 | 4/21-12/24 | 2/27/2025 | Assets not included in the IRP or PHMSA IRP. |
| Columbia of Virginia | SAVE - 2026 | $176.1 | 10/24-12/26 | 8/12/2025 | Replacement projects that (i) enhance system safety or reliability, or (ii) reduce, or potentially reduce, greenhouse gas emissions. Includes costs associated with Advanced Leak Detection and Repair. |
| Columbia of Kentucky | SMRP - 2026 | $181.4 | 1/23-12/26 | 10/15/2025 | Replacement of mains and inclusion of system safety investments. |
| NIPSCO - Electric<sup>(2)</sup>  | TDSIC - 7 | $175.4 | 7/22-3/25 | 5/27/2025 | New or replacement projects undertaken for the purpose of safety, reliability, system modernization or economic development. |
| NIPSCO - Electric<sup>(3)</sup> | GCT - 3  | $385.6 | 9/23-10/26 | 12/16/2025 | New gas peaker generation project cost forecasted through October 2026. |
| NIPSCO - Gas | TDSIC - 10  | $90.3 | 4/25-9/25 | 11/25/2025 | New or replacement projects undertaken for the purpose of safety, reliability, system modernization, or economic development.  |
| NIPSCO - Gas | FMCA -5 | $21.9 | 6/24-6/25 | 8/27/2025 | Project costs to comply with federal mandates. |
| Columbia of Ohio | IRP - 2026 | $1185.0 | 4/21-12/25 | 2/27/2026 | Replacement of hazardous service lines, cast iron, wrought iron, uncoated steel, and bare steel pipe. |
| Columbia of Ohio | PHMSA IRP - 2026 | $180.2 | 1/23-12/25 | 2/27/2026 | Investments necessary to comply with the PHMSA Mega Rule.  |
| **<u>Pending Commission Approval</u>** | **<u>Pending Commission Approval</u>** | **<u>Pending Commission Approval</u>** | **<u>Pending Commission Approval</u>** | **<u>Pending Commission Approval</u>** | **<u>Pending Commission Approval</u>** |
| NIPSCO - Gas | FMCA - 1  | $52.5 | 7/25-12/25 | 2/24/2026 | Project costs to comply with federal mandates. |
| Columbia of Ohio | CEP - 2026 | $1292.0 | 4/21-12/25 | 2/20/2026 | Assets not included in the IRP or PHMSA IRP. |

---

<sup>(1)</sup> Programs do not include any costs already included in base rates.

<sup>(2)</sup> TDSIC – 7 was originally filed in May 2025. TDSIC - 7 was refiled in February 2026, due to the electric rate case Step 2 Compliance Filing. The refiling adjusted the capital in the tracker from $315.6 million to $175.4 million.

<sup>(3)</sup> Capital investment is based on a projected amount. The capital investment has not all been incurred to date and represents a forecasted average for the billing period.

Columbia of Ohio filed an application in December 2025 to seek continuation of its PHMSA IRP Rider for calendar year 2027. The request includes recovery of $404.3 million of capital to reconfirm maximum allowable operating pressure of transmission class pipe to meet federal rule requirements.

NIPSCO filed a Gas TDSIC Plan (2026 - 2030) in December 2025. The petition is seeking recovery of new or replacement projects undertaken for the purpose of safety, reliability, system modernization, or economic development. The request includes $741.0 million of estimated capital, including indirect costs and AFUDC. There is a hearing scheduled for May 2026 with the final order expected in July 2026.

<u>Financing Activities</u>

***Common Stock.*** Refer to Note 6, "Equity," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for information on common stock.

***Short-Term Debt.*** Refer to Note 7, "Short-Term Borrowings," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for information on short-term debt activity.

***Noncontrolling Interest*.** Refer to Note 4, "Noncontrolling Interests," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for information on contributions and distributions from noncontrolling interests.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

<u>Sources of Liquidity</u>

The following table displays our liquidity position as of March 31, 2026 and December 31, 2025:

---

| | | |
|:---|:---|:---|
| *(in millions)* | **March 31, 2026** | December 31, 2025 |
| **Current Liquidity** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Revolving Credit Facility | $**2500.0** | $2500.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;Accounts Receivable Programs<sup>(1)</sup> | **375.0** | 175.0 |
| *Less:* |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Commercial Paper | **1291.0** | 736.0 |
| &nbsp;&nbsp;&nbsp;&nbsp;Letters of Credit Outstanding Under Credit Facility | **25.0** | 25.0 |
| *Add:* |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Cash and Cash Equivalents | **71.9** | 110.1 |
| **Net Available Liquidity** | $**1630.9** | $2024.1 |

---

<sup>(1)</sup> Represents the lesser of the seasonal limit or maximum borrowings supportable by the underlying receivables.

***Debt Covenants*.** We are subject to a financial covenant under our revolving credit facility, which requires us to maintain a debt to capitalization ratio that does not exceed 70.0%. As of March 31, 2026, the ratio was 51.5%.

***Credit Ratings.*** The credit rating agencies periodically review our ratings, taking into account factors such as our capital structure and earnings profile. The following table includes our and NIPSCO's credit ratings and ratings outlook as of March 31, 2026.

A credit rating is not a recommendation to buy, sell, or hold securities, and may be subject to revision or withdrawal at any time by the assigning rating organization.

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | S&P | S&P | Moody's | Moody's | Fitch | Fitch |
| | Rating | Outlook | Rating | Outlook | Rating | Outlook |
| NiSource | BBB+ | Stable | Baa2 | Stable | BBB | Stable |
| NIPSCO | BBB+ | Stable | Baa1 | Stable | BBB | Stable |
| Commercial Paper | A-2 | Stable | P-2 | Stable | F2 | Stable |

---

Certain of our subsidiaries have agreements that contain ''ratings triggers'' that require increased collateral if our credit rating or the credit ratings of certain of our subsidiaries are below investment grade. These agreements are primarily for insurance purposes and for the physical purchase or sale of power. As of March 31, 2026, the collateral requirement of approximately $158.5 million would be required in the event of a downgrade below investment grade. In addition to agreements with ratings triggers, there are other agreements that contain ''adequate assurance'' or ''material adverse change'' provisions that could necessitate additional credit support such as letters of credit and cash collateral to transact business.

***Equity.*** Our authorized capital stock consists of 770,000,000 shares, $0.01 par value, 750,000,000 are common stock and 20,000,000 are preferred stock. As of March 31, 2026, 479,364,801 shares of common stock were outstanding and no shares of preferred stock were outstanding.

***Contractual Obligations.*** A summary of contractual obligations is included in the Company's Annual Report on Form 10-K for the year ended December 31, 2025. Since December 31, 2025, NIPSCO and GenCo have executed several capacity agreements and other agreements to support data center contracts. In addition, GenCo has exercised an option and intends to convert its ESA relating to the Tipton BESS Project to a BTA. Except for these items there were no additional material changes from year-end during the three months ended March 31, 2026. Refer to Note 13, "Other Commitments and Contingencies," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for additional information regarding the EPC Contracts and equipment supply contracts.

***Guarantees, Indemnities and Other Off Balance Sheet Arrangements.*** We and certain of our subsidiaries enter into various agreements providing financial or performance assurance to third parties on behalf of certain subsidiaries as a part of normal business. Such agreements include guarantees and stand-by letters of credit. Refer to Note 13, "Other Commitments and

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

Contingencies," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for additional information about such arrangements.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**Regulatory, Environmental and Safety Matters**

<u>Cost Recovery and Trackers</u>

Comparability of our operating results is impacted by regulatory trackers that allow for the recovery in rates of certain costs. Certain approved regulatory tracker mechanisms allow for abbreviated regulatory proceedings in order for the operating companies to quickly implement revised rates and recover associated costs.

A portion of the NIPSCO Operations' and Columbia Operations' gas distribution revenue is related to the recovery of gas costs through GCAs, the review of which occurs through standard regulatory proceedings. All states in our operating area require periodic review of actual gas procurement activity to determine prudence and confirm the recovery of prudently incurred energy commodity costs supplied to customers.

We recognize that energy efficiency reduces emissions, conserves natural resources and saves our customers money. Our gas distribution companies offer programs such as energy efficiency upgrades, home checkups and weatherization services. The increased efficiency of natural gas appliances and improvements in home building codes and standards contribute to a long-term trend of declining average use per customer. While we are looking to expand offerings so the energy efficiency programs can benefit as many customers as possible, our gas distribution operations utilities have pursued changes in rate design to more effectively match recoveries with costs incurred. Columbia of Ohio has adopted a straight fixed variable rate design for residential and small commercial customers that closely links the recovery of fixed costs with fixed charges. Columbia of Maryland and Columbia of Virginia have regulatory approval for weather and revenue normalization adjustments for certain customer classes, which adjust monthly revenues that exceed or fall short of approved levels. Columbia of Pennsylvania continues to operate its pilot residential weather normalization adjustment and also has a fixed customer charge. This weather normalization adjustment only adjusts revenues when actual weather compared to normal varies by more than 5%. Columbia of Kentucky incorporates a weather normalization adjustment for certain customer classes and also has a fixed customer charge. NIPSCO Gas has also received approval and implemented a weather normalization adjustment for certain of its customer classes. NIPSCO Gas and Electric include a fixed customer charge for residential and small commercial and industrial customer classes.

A portion of the NIPSCO Operations' revenue is related to the recovery of fuel costs to generate power and the fuel costs related to purchased power. These costs are recovered through a FAC, which is updated quarterly to reflect actual costs incurred to supply electricity to customers.

While increased efficiency of electric appliances and improvements in home building codes and standards have similarly impacted the average use per electric customer in recent years, NIPSCO expects future growth in per customer usage as a result of increasing electric applications, such as electric vehicles. These ongoing changes in use of electricity will likely lead to development of innovative rate designs, and NIPSCO will continue efforts to design rates that increase the certainty of recovery of fixed costs.

<u>Rate Case Actions</u>

The following table describes current rate case actions as applicable in each of our jurisdictions net of tracker impacts:

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| *(in millions)* | | | | | |
| Company | Approved ROE | Requested Incremental Revenue | Approved Incremental Revenue | Filing Date | Rates <br>Effective |
| **Approved Rate Cases** | **Approved Rate Cases** |  |  |  |  |
| &nbsp;&nbsp;Columbia of Pennsylvania | 10.00% | $110.4 | $55.6 | March 20, 2025 | January 2026 |
| &nbsp;&nbsp;Columbia of Maryland | 9.80% | $10.7 | $7.8 | September 24, 2024 | April 2025 |
| &nbsp;&nbsp;Columbia of Kentucky | 9.75% | $23.8 | $14.3 | May 16, 2024 | January 2025 |
| &nbsp;&nbsp;Columbia of Virginia<sup>(1)</sup> | 9.75% | $37.2 | $28.2 | April 29, 2024 | October 2024 |
| &nbsp;&nbsp;Columbia of Ohio | 9.60% | $221.4 | $68.3 | June 30, 2021 | March 2023 |
| &nbsp;&nbsp;NIPSCO - Gas<sup>(2)</sup> | 9.75% | $161.9 | $120.9 | October 25, 2023 | August 2024 |
| &nbsp;&nbsp;NIPSCO - Electric<sup>(3)</sup> | 9.75% | $368.7 | $257.0 | September 12, 2024 | July 2025 |

---

<sup>(1)</sup> The approved rate case resulted in a black box settlement, representing a settlement to a specific revenue increase but not a specified ROE. The settlement provides use of a 9.75% ROE for future SAVE filings.

<sup>(2)</sup> New rates were implemented in 2 steps, with implementation of Step 1 rates effective in August 2024 and Step 2 rates effective in February 2025.

<sup>(3)</sup> New rates were implemented in multiple steps, with implementation of Step 1 rates in July 2025 and Step 2 rates in March 2026.

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**Regulatory, Environmental and Safety Matters**

<u>PHMSA Legislation and Regulations</u>

To fulfill our vision of being a trusted energy provider, we follow safety practices required by regulations and we implement our SMS. SMS serves as the framework to identify and reduce risks and ensure consistent safety processes, procedures and operations across the organization.

As directed by law in the Protecting Our Infrastructure of Pipelines and Enhancing Safety (PIPES) Act of 2020, PHMSA has revised, and continues to revise, the pipeline safety regulations focused on public safety and environmental hazard mitigation, leak detection, methane emissions reduction, and enhanced safeguards for low-pressure distribution systems. Proposed revisions included requirements to detect and repair more leaks, increase survey frequency, and incorporate additional protections to prevent over-pressurization. A final leak detection and repair rule was withdrawn from publication in the Federal Register in January 2025, and no further progress has been made on the Safety of Gas Distribution Pipelines rulemaking.

We continue to evaluate and monitor PHMSA-related legislation and regulations but cannot predict the impact of changing pipeline safety regulations on our business at this time.

<u>Environmental and Climate Change Issues</u>

In March 2025, the EPA announced it will undertake 31 deregulatory actions to advance the current presidential administration's policy priorities as directed by various executive orders. These actions will address multiple existing water, waste, air and climate regulations including, but not limited to, GHG and CCR rules. In November 2025, the EPA proposed a rule to extend the compliance deadline for owners and operators to complete closure of their unlined CCR surface impoundments larger than 40 acres from October 2028 to October 2031. In February 2026, the EPA issued a final rule rescinding the 2009 Endangerment Finding, the scientific and legal foundation for federal GHG regulations under the Clean Air Act. Additionally, in February 2026, the EPA issued a final rule extending compliance deadlines for several provisions of the Legacy CCR Rule and subsequently, also in April 2026 proposed further revisions to the Legacy CCR Rule. NiSource will continue to monitor these matters and assess the impacts to our business as regulations are proposed and finalized, or as otherwise required by law.

***Physical Climate Risks.*** Increased frequency of severe and extreme weather events associated with climate change could materially impact our facilities, energy sales, and results of operations. We are unable to predict these events. However, we perform assessments of physical risk, including physical climate risk, to our business. More extreme and volatile temperatures, increased storm intensity and flooding, and more volatile precipitation leading to changes in lake and river levels are among the weather events that are most likely to impact our business. Efforts to mitigate these physical risks continue to be implemented.

***Transition Climate Risks and Opportunities***. We actively engage with and monitor the impact that proposed legislative and regulatory programs related to GHG emissions, at both the federal and state levels, would have on our business.

In June 2025, the EPA proposed to repeal GHG emissions standards for fossil fuel-fired power plants that were finalized by the previous federal administration in May 2024. The proposed repeal would eliminate key requirements from the 2024 Carbon Pollution Standards, including capacity factor thresholds and carbon capture and storage (CCS) mandates. If finalized, this action would remove regulatory constraints that could significantly impact planned gas generation, allowing customers to avoid approximately $675 million in additional cost as contemplated through the 2024 NIPSCO IRP.

We also continue to monitor evolving state policies related to GHG emissions from our gas distribution companies. The Climate Solutions Now Act of 2022 ("Act") requires Maryland to reduce GHG emissions by 60% by 2031 (from 2006 levels), and it requires the state to reach net zero emissions by 2045. The Maryland Department of the Environment ("MDE") adopted a plan to achieve its 2031 goal and is required to adopt a plan for its 2045 net zero goal by 2030. The Act also enacts a state policy to move to broader electrification of both existing buildings and new construction. In December 2024, the MDE issued final Building Energy Performance Standards, which require net zero direct GHG emissions from large buildings by 2040 with interim targets, or payments of an alternative compliance fee. Under an executive order, Maryland is also developing a Clean Heat Standard and a Zero-Emission Heating Equipment Standard, among other programs, that are intended to transition gas furnaces to electric heat pumps. In December 2025, the Maryland Public Service Commission ("MD PSC") issued proposed regulations with the stated purpose of eliminating "subsidies" for the extension of gas mains and service lines to new residential and commercial customers. According to the MD PSC, these regulations, if finalized, would require persons who request new

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**<u>[**Table of Contents**](#i91125c193fdf4e98980eeb4e396aea15_7)</u>**

<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

**Regulatory, Environmental and Safety Matters**

service to pay the full cost of extending service in order to minimize the risk of future stranded costs for all ratepayers. In August 2025, the MD PSC instituted formal proceedings to investigate issues pertaining to long-term natural gas company planning practices. One purpose of these proceedings is to ensure that planning is consistent with Maryland's climate goals. Columbia of Maryland cannot predict the final impact of these policies and proceedings on our business at this time.

***Net Zero Goal.*** In November 2022, we announced a goal of net zero GHG emissions by 2040 covering both Scope 1 and Scope 2 GHG emissions ("Net Zero Goal"). Our Net Zero Goal builds on GHG emission reductions achieved to-date. We plan to achieve our Net Zero Goal primarily through the continuation and enhancement of existing programs, such as retiring and replacing coal-fired electric generation with low- or zero-emission electric generation, ongoing pipe replacement and modernization programs, and deployment of advanced leak-detection technologies. In addition, we plan to advance other low- or zero-emission energy resources and technologies, which may include hydrogen, renewable natural gas, long-duration storage, and/or deployment of carbon capture and utilization technologies, if and when these become technologically and economically feasible. Carbon offsets and renewable energy credits may also be used to support achievement of our Net Zero Goal. As of the end of 2025, we had reduced Scope 1 GHG emissions by approximately 70% from 2005 levels.

Our GHG emissions projections, including achieving a Net Zero Goal, are subject to various assumptions that involve risks and uncertainties, and did not include any assumptions related to data center development and associated load growth. We remain committed to our Net Zero Goal by 2040 which will require supportive regulatory and legislative policies, favorable stakeholder environments and advancement of technologies that are not currently economically or technologically feasible to deploy at scale, as well as execution of our business plan. Otherwise, our actual results or ability to achieve our Net Zero Goal, including by 2040, may differ materially.

**Market Risk Disclosures**

Risk is an inherent part of our businesses. The extent to which we properly and effectively identify, assess, monitor and manage each of the various types of risk involved in our businesses is critical to our profitability. We seek to identify, assess, monitor and manage, in accordance with defined policies and procedures, the following principal market risks that are involved in our businesses: commodity price risk, interest rate risk and credit risk. We manage risk through a multi-faceted process with oversight by the Risk Management Committee that requires constant communication, judgment and knowledge of specialized products and markets. Our senior management takes an active role in the risk management process and has developed policies and procedures that require specific administrative and business functions to assist in the identification, assessment and control of various risks. These may include, but are not limited to market, operational, financial, compliance and strategic risk types. In recognition of the increasingly varied and complex nature of the energy business, our risk management process, policies and procedures continue to evolve and are subject to ongoing review and modification.

<u>Commodity Price Risk</u>

Our gas and electric subsidiaries have commodity price risk primarily related to the purchases of natural gas, power and capacity. To manage this market risk, our subsidiaries use derivatives, including commodity futures contracts, swaps, forwards and options. We do not participate in speculative energy trading activity.

Commodity price risk resulting from derivative activities at our rate-regulated subsidiaries is limited and does not bear significant exposure to earnings risk, since our current regulatory mechanisms allow recovery of prudently incurred purchased power, fuel and gas costs through the rate-making process, including gains or losses on these derivative instruments. These changes are included in the GCA and FAC regulatory rate-recovery mechanisms. If these mechanisms were to be adjusted or eliminated, these subsidiaries may begin providing services without the benefit of the traditional rate-making process and may be more exposed to commodity price risk. For additional information, see "Results and Discussion of Segment Operations" in this Management's Discussion.

Our subsidiaries are required to make cash margin deposits with their brokers to cover actual and potential losses in the value of outstanding exchange traded derivative contracts. The amount of these deposits, some of which are reflected in our restricted cash balance, may fluctuate significantly during periods of high volatility in the energy commodity markets.

Refer to Note 9, "Risk Management Activities," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for further information on our commodity price risk assets and liabilities.

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<u>ITEM 2.</u> <u>MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)</u>

**NiSource Inc.**

<u>Interest Rate Risk</u>

We are exposed to interest rate risk as a result of changes in interest rates on borrowings under our revolving credit agreement, commercial paper program, and accounts receivable programs, which have interest rates that are indexed to short-term market interest rates. Based upon average borrowings and debt obligations subject to fluctuations in short-term market interest rates, an increase (or decrease) in short-term interest rates of 100 basis points (1%) would have increased (or decreased) interest expense by $2.0 million for the three months ended March 31, 2026 and $2.5 million for the three months ended March 31, 2025, respectively. We are also exposed to interest rate risk as a result of changes in benchmark rates that can influence the interest rates of future long-term debt issuances. From time to time we may enter into forward interest rate instruments to lock in long term interest costs and/ or rates.

<u>Credit Risk</u>

Due to the nature of the industry, credit risk is embedded in many of our business activities. Our extension of credit is governed by a Corporate Credit Risk Management Policy which establishes guidelines for documenting management approval levels for credit limits, evaluating creditworthiness, and credit risk mitigation efforts. Exposures to credit risks are monitored by the risk management function, which is independent of commercial operations. Credit risk arises due to the possibility that a customer, supplier or counterparty will not be able or willing to fulfill its obligations on a transaction on or before the settlement date. For derivative-related contracts, credit risk arises when counterparties are obligated to deliver or purchase defined commodity units of gas or power to us at a future date per execution of contractual terms and conditions. Exposure to credit risk is measured in terms of both current obligations and the market value of forward positions net of any posted collateral such as cash and letters of credit.

The financial status of our banking partners is periodically assessed through traditional credit ratings provided by major credit rating agencies.

**Other Information**

<u>Critical Accounting Estimates</u>

A summary of our critical accounting estimates is included in the Company's Annual Report on Form 10-K for the year ended December 31, 2025. There were no material changes made as of March 31, 2026.

<u>Recently Issued Accounting Pronouncements</u>

Refer to Note 2, "Recent Accounting Pronouncements," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for additional information about recently issued and adopted accounting pronouncements.

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**NiSource Inc.**

<u>ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK</u>

Quantitative and qualitative disclosures about market risk are reported in Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations - Market Risk Disclosures."

<u>ITEM 4. CONTROLS AND PROCEDURES</u>

<u>Evaluation of Disclosure Controls and Procedures</u>

Our chief executive officer and our chief financial officer are responsible for evaluating the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)). Our disclosure controls and procedures are designed to provide reasonable assurance that the information required to be disclosed by us in reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including our chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure and is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC. Based upon that evaluation, our chief executive officer and chief financial officer concluded that, as of the end of the period covered by this report, our disclosure controls and procedures were effective at a reasonable assurance level.

<u>Changes in Internal Controls</u>

There have been no changes in our internal control over financial reporting during the most recently completed quarter covered by this report that have materially affected, are reasonably likely to materially affect, our internal control over financial reporting.

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**NiSource Inc.**

**<u>PART II</u>**

<u>ITEM 1. LEGAL PROCEEDINGS</u>

For a description of our legal proceedings, see Note 13, "Other Commitments and Contingencies - B. Legal Proceedings," in the Notes to the Condensed Consolidated Financial Statements (unaudited).

<u>ITEM 1A. RISK FACTORS</u>

Please refer to the risk factors set forth in Part I, Item 1A of the Annual Report on Form 10-K for the year ended December 31, 2025 and Part II, Item 1A of the Quarterly Report on Form 10-Q for the quarter ended March 31, 2026. There have been no material changes to such risk factors.

<u>ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS</u>

None.

<u>ITEM 3. DEFAULTS UPON SENIOR SECURITIES</u>

None.

<u>ITEM 4. MINE SAFETY DISCLOSURES</u>

Not applicable.

<u>ITEM 5. OTHER INFORMATION</u>

<u>Director and Officer Trading Arrangements</u>

During the quarter ended March 31, 2026, none of our directors or executive officers adopted or terminated a Rule 10b5-1 trading plan or adopted or terminated a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).

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<u>ITEM 6. EXHIBITS</u>

**NiSource Inc.**

---

| | |
|:---|:---|
| (31.1) | <u>[Certification of Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](ni-ex311x20260331.htm)</u>\* |
| (31.2) | <u>[Certification of Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](ni-ex312x20260331.htm)</u>\* |
| (32.1) | <u>[Certification of Chief Executive Officer pursuant to 18. U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith).](ni-ex321x20260331.htm)</u>\* |
| (32.2) | <u>[Certification of Chief Financial Officer pursuant to 18. U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith).](ni-ex322x20260331.htm)</u>\* |
| (10.1) | NiSource Inc. Executive Severance Policy, as amended and restated effective January 1, 2026 (incorporated by reference to <u>[Exhibit 10.13 to the NiSource Inc. Form 10-K filed](https://www.sec.gov/Archives/edgar/data/1111711/000111171126000027/ni-ex1013x20251231.htm)</u> on February 11, 2026). |
| (101.INS) | Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. |
| (101.SCH) | Inline XBRL Schema Document |
| (101.CAL) | Inline XBRL Calculation Linkbase Document |
| (101.LAB) | Inline XBRL Labels Linkbase Document |
| (101.PRE) | Inline XBRL Presentation Linkbase Document |
| (101.DEF) | Inline XBRL Definition Linkbase Document |
| (104) | Cover page Interactive Data File (formatted as inline XBRL, and contained in Exhibit 101.) |
| \* | Exhibit filed herewith. |
| \*\* | Schedules and similar attachments to this Exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The Company agrees to furnish supplementally a copy of any omitted schedule or exhibit to the U.S. Securities and Exchange Commission (the "SEC") upon request |

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<u>SIGNATURE</u>

**NiSource Inc.**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

---

| | | | |
|:---|:---|:---|:---|
| | | | NiSource Inc. |
| | | | (Registrant) |
| Date: | May 6, 2026 | By: | /s/ Gunnar J. Gode |
|  |  |  | Gunnar J. Gode |
|  |  |  | Senior Vice President, Chief Accounting and Tax Officer<br>(Principal Accounting Officer) |

---

## Exhibit 31.1

**Exhibit 31.1**

**Certification Pursuant to**

**Section 302 of the Sarbanes-Oxley Act of 2002**

I, Lloyd M. Yates, certify that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.I have reviewed this Quarterly Report of NiSource Inc. on Form 10-Q of NiSource Inc.;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

---

| | | | |
|:---|:---|:---|:---|
| Date: | May 6, 2026 | By: | /s/ Lloyd M. Yates |
|  |  |  | Lloyd M. Yates |
|  |  |  | President and Chief Executive Officer |

---

## Exhibit 31.2

**Exhibit 31.2**

**Certification Pursuant to**

**Section 302 of the Sarbanes-Oxley Act of 2002**

I, Shawn Anderson, certify that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.I have reviewed this Quarterly Report of NiSource Inc. on Form 10-Q of NiSource Inc.;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

---

| | | | |
|:---|:---|:---|:---|
| Date: | May 6, 2026 | By: | /s/ Shawn Anderson |
|  |  |  | Shawn Anderson |
|  |  |  | Executive Vice President and Chief Financial Officer |

---

## Exhibit 32.1

**Exhibit 32.1**

**Certification Pursuant to**

**Section 906 of the Sarbanes-Oxley Act of 2002**

In connection with the Quarterly Report of NiSource Inc. (the "Company") on Form 10-Q for the quarter ending March 31, 2026 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Lloyd M. Yates, Chief Executive Officer of the Company, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

---

| |
|:---|
| /s/ Lloyd M. Yates |
| Lloyd M. Yates |
| President and Chief Executive Officer |
| Date:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; May 6, 2026 |

---

## Exhibit 32.2

**Exhibit 32.2**

**Certification Pursuant to**

**Section 906 of the Sarbanes-Oxley Act of 2002**

In connection with the Quarterly Report of NiSource Inc. (the "Company") on Form 10-Q for the quarter ending March 31, 2026 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Shawn Anderson, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

---

| |
|:---|
| /s/ Shawn Anderson |
| Shawn Anderson |
| Executive Vice President and Chief Financial Officer |
| Date:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; May 6, 2026 |

---

<br>