NISOURCE INC.

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 and the issuance of debt and/or equity. External debt financing is provided primarily through the issuance of long-term debt, accounts receivable securitization programs and our $1.85 billion commercial paper program, which is backstopped by our committed revolving credit facility with a total availability from third-party lenders of $1.85 billion. We believe these sources provide adequate capital to fund our operating activities and capital expenditures in 2025 and beyond. Sources of financing activities for the quarter ended March 31, 2025 are as follows:

ATM program

•As of December 31, 2024 the ATM program had approximately $297.7 million of equity available for issuance through December 31, 2025.

◦In February 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 2,000,000 shares from third parties, which the forward purchaser sold, through its affiliated agent, at a weighted average price of $40.10 per share.

◦In March 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 1,707,320 shares from third parties, which the forward purchaser sold, through its affiliated agent, at a weighted average price of $41.00 per share.

◦As of March 31, 2025, the ATM program (inclusive of the forward sale agreements) had approximately $147.5 million of equity available for issuance.

Long-Term Debt

•On March 27, 2025 we completed the issuance and sale of $750.0 million of 5.850% senior unsecured notes maturing in 2055, which resulted in approximately $739.6 million of net proceeds after discount and debt issuance costs.

See Note 6, "Equity," Note 7, "Short-Term Borrowings," and Note 8, "Long-Term Debt," 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:

Operating Activities

The increase in cash from operating activities was primarily driven by year over year change in exchange gas receivables, higher net income, accounts payable, prepayments and other current assets, partially offset by higher accounts receivables due to colder weather.

Investing Activities

Year over year increase in investing activities was primarily comprised of milestone payments to renewable generation asset developers for certain of our BTA projects and advanced deposits.

We remain on track to make capital investments totaling $4.0 billion to $4.3 billion during the 2025 period. We also expect to invest approximately $19.4 billion during the 2025-2029 period, including capital investments to support our generation transition strategy. These forecasted capital investments are subject to continuing review and adjustment. Actual capital expenditures may vary from these estimates.

Regulatory Capital Programs. We are in the process of upgrading and modernizing 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 2025, we continue to move forward on core infrastructure investment programs supported by complementary regulatory and customer initiatives across all six 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:

(1)Programs do not include any costs already included in base rates.

(2)TDSIC-5 was effective October 2024 through March 2025. An order was received for TDSIC-6 on March 26, 2025, and billing began in April 2025.

(3)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.

(4)The capital investment remaining after the Step 2 Compliance Filing, on February 13, 2025, is $5.8 million for TDSIC-8 and $2.3 million for FMCA-3.

(5)Rates went into effect January 2, 2025, subject to refund.

NIPSCO Gas filed a FMCA CPCN on April 21, 2025. The petition is seeking recovery of spend incurred related to certain federally mandated Pipeline Safety IV Compliance Plan costs. The request includes $244.1 million of estimated capital, including indirect costs and AFUDC.

Financing Activities

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

Long-Term Debt. Refer to Note 8, "Long-Term Debt," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for information on long-term debt activity.

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.

Sources of Liquidity

The following table displays our liquidity position as of March 31, 2025 and December 31, 2024:

(1)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, 2025, the ratio was 53.8%.

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, 2025. There were no changes to the below credit ratings or outlooks since February 2020.

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.

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, 2025, the collateral requirement that would be required in the event of a downgrade below the ratings trigger levels would amount to approximately $146.1 million. 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, 2025, 470,618,280 shares of common stock were outstanding and no 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, 2024. Except for our March 2025 debt issuance, there were no additional material changes from year-end during the three months ended March 31, 2025. Refer to Note 8, "Long-Term Debt," in the Notes to the Condensed Consolidated Financial Statements (unaudited) for additional information regarding the debt issuances.

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