20 (1) Represents costs incurred associated with the planned retirement of Units 7 and 8 at Bailly Generating Station. Includes costs for contract termination, employee severance and write downs of materials and supplies inventory balances. (2) Represents costs incurred for liability adjustments at identified Superfund sites. (3) Represents costs incurred associated with the Separation of CPG. Stockholder Information FORWARD-LOOKING STATEMENTS This report contains forward-looking statements within the meaning of federal securities laws. Investors and prospective investors should understand that many factors govern whether any forward-looking statement contained herein will be or can be realized. Any one of those factors could cause actual results to differ materially from those projected. Examples of forward-looking statements include, but are not limited to, statements concerning NiSource’s plans, strategies, objectives, expected performance, expenditures, recovery of expenditures through rates, and any and all underlying assumptions and other statements that are other than statements of historical fact. 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. Factors that could cause actual results to differ materially from the projections, forecasts, estimates, plans and expectations discussed in this report include, but are not limited to, NiSource’s debt obligations; any changes in NiSource’s credit rating; NiSource’s ability to execute its growth strategy; changes in general economic, capital and commodity market conditions; pension funding obligations; economic regulation and the impact of regulatory rate reviews; NiSource’s ability to obtain expected financial or regulatory outcomes; any damage to NiSource’s reputation; compliance with environmental laws and the costs of associated liabilities; fluctuations in demand from residential and commercial customers; economic conditions of certain industries; the success of NIPSCO’s electric generation strategy; the price of energy commodities and related transportation costs; the reliability of customers and suppliers to fulfill their payment and contractual obligations; potential impairments of goodwill or definite-lived intangible assets; changes in taxation and accounting principles; potential incidents and other operating risks associated with our business; the impact of an aging infrastructure; the impact of climate change; potential cyber-attacks; construction risks and natural gas costs and supply risks; extreme weather conditions; the attraction and retention of a qualified workforce; advances in technology; the ability of NiSource’s subsidiaries to generate cash; uncertainties related to the expected benefits of the separation of Columbia Pipeline Group Inc. and other matters referenced in the “Risk Factors” section of NiSource’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016, and in other filings with the Securities and Exchange Commission. All forward-looking statements are expressly qualified in their entirety by the foregoing cautionary statements. NiSource undertakes no obligation to, and expressly disclaims any such obligation to, update or revise any forward-looking statements to reflect changed assumptions, the occurrence of anticipated or unanticipated events or changes to the future results over time or otherwise, except as required by law. REGULATION G DISCLOSURE STATEMENT This report includes financial results and guidance for NiSource with respect to net operating earnings and operating earnings, which are non-GAAP financial measures as defined by the SEC’s Regulation G. The company includes such measures because management believes they permit investors to view the company’s performance using the same tools that management uses and to better evaluate the company’s ongoing business performance. With respect to such guidance, it should be noted that there will likely be differences between such measures and GAAP equivalents due to various factors, including, but not limited to, fluctuations in weather, asset sales and impairments, and other items included in GAAP results. NiSource is not able to estimate the impact of such factors on GAAP earnings and, as such, is not providing earnings guidance on a GAAP basis. NiSource Inc. common stock is listed and traded on the New York Stock Exchange (“NYSE”) under the symbol NI. The shares are listed in financial stock quotations as NISOURCE. As of December 31, 2016, NiSource had 22,597 registered common stockholders. ANTICIPATED DIVIDEND RECORD & PAYMENT DATES - NI COMMON STOCK COMMON STOCK DIVIDEND DECLARED On February 17, 2017, the company paid a quarterly dividend of $0.175 per share, equivalent to $0.70 per share on an annual basis. INVESTOR & FINANCIAL INFORMATION Financial analysts and investment professionals should direct written and telephone inquiries to NiSource Investor Relations at 801 E. 86th Avenue, Merrillville, IN 46410 or (614) 460-4789. Copies of NiSource’s financial reports are available by writing or calling the Investor Relations department at the address or phone number listed above. The materials are also available at NiSource.com. STOCKHOLDER SERVICES Questions about stockholder accounts, stock certificates, transfer of shares, dividend payments, automatic dividend reinvestment and stock purchase plan, and electronic deposit may be directed to Computershare at the following: Computershare P. O. Box 30170 College Station, Texas 77842-3170 or 211 Quality Circle, Suite 210 College Station, Texas 77845 (888) 884-7790 TDD for Hearing Impaired: (800) 231-5469 Foreign Stockholders: (201) 680-6578 TDD Foreign Stockholders: (201) 680-6610 computershare.com/investor RECORD DATE 04/28/17 07/31/17 10/31/17 02/09/18 PAYMENT DATE 05/19/17 08/18/17 11/20/17 02/20/18 Return to page 1. Return to page 4. Return to page 12.