e424b5

Filed Pursuant to Rule 424(b)(5)
File Nos. 333-170385 and 333-170385-01


			Amount of
	Maximum		Aggregate
	Aggregate		Registration
Title of Each Class of Securities Offered	Offering Price		Fee(1)
6.25% Notes due 2040	$	250,000,000	$	17,825


(1)	Calculated in accordance with Rule 457(r) under the Securities Act of 1933. The fee will be paid by wire transfer within the time required by Rule 456(b) of the Securities Act of 1933.

Prospectus Supplement

December 1, 2010

(To Prospectus dated November 5, 2010)

$250,000,000

NiSource Finance Corp.

6.25% Notes due 2040

Unconditionally Guaranteed by NiSource Inc.

The Notes will mature on December 15, 2040. The Notes will bear interest at a rate of 6.25% per year. Interest on the Notes will be paid semi-annually in arrears on June 15 and December 15 of each year, beginning June 15, 2011.

At our option, we may redeem some or all of the Notes at any time and from time to time at the redemption prices described herein.

The Notes will be our senior unsecured obligations and will rank equally with all our other senior unsecured indebtedness from time to time outstanding.

Investing in the Notes involves risks. See “Risk Factors” on page S-4 of this prospectus supplement.

Neither the Securities and Exchange Commission, or SEC, nor any state securities commission has approved or disapproved of the Notes or passed upon the adequacy or accuracy of this prospectus supplement or the accompanying prospectus. Any representation to the contrary is a criminal offense.


	Per Note			Total

Price to Public (1)		98.730	%	$	246,825,000
Underwriting Discount		0.875	%	$	2,187,500
Proceeds, before expenses, to us (1)		97.855	%	$	244,637,500


(1)		Plus accrued interest, if any, from December 8, 2010.

The Notes will not be listed on any securities exchange or quoted on any automated dealer quotation system.

We expect that delivery of the Notes will be made to investors through the book-entry delivery system of The Depository Trust Company on or about December 8, 2010.

Joint Book-Running Managers


Deutsche Bank Securities	RBS

Co-Managers

BNP PARIBAS KeyBanc Capital Markets Mizuho Securities USA Inc. PNC Capital Markets LLC

ABOUT THIS PROSPECTUS SUPPLEMENT

This document is in two parts. The first is this prospectus supplement, which describes the specific terms of this offering. The second part, the accompanying prospectus, gives more general information, some of which may not apply to this offering.

If the description of the offering varies between this prospectus supplement and the accompanying prospectus, you should rely on the information in this prospectus supplement.

You should rely only on the information contained in this prospectus supplement or to which we have referred you. We have not authorized anyone to provide you with information that is different. This prospectus supplement may only be used where it is legal to sell these securities. The information in this prospectus supplement may only be accurate on the date of this prospectus supplement.

TABLE OF CONTENTS


	Page

Prospectus Supplement
About This Prospectus Supplement		S-i
Table of Contents		S-i
Summary		S-1
Risk Factors		S-4
Incorporation by Reference		S-5
Use of Proceeds		S-5
Capitalization		S-6
Ratios of Earnings to Fixed Charges		S-7
Supplemental Description of the Notes		S-8
Certain ERISA Considerations		S-10
Underwriting		S-12
Conflict of Interest		S-13
Legal Matters		S-14
Experts		S-14

Prospectus
About this Prospectus		2
Where You Can Find More Information		2
Risk Factors		3
Forward-Looking Statements		3
NiSource Inc.		4
NiSource Finance Corp.		5
Use of Proceeds		5
Ratios of Earnings to Fixed Charges		5
Description of Capital Stock		5
Description of the Debt Securities		7
Description of Warrants		16
Description of Stock Purchase Contracts and Stock Purchase Units		17
Plan of Distribution		18
Legal Opinions		19
Experts		19

S-i

SUMMARY

This summary highlights certain information appearing elsewhere in this prospectus supplement. This summary is not complete and does not contain all of the information that you should consider before purchasing the Notes. We urge you to read carefully the entire prospectus supplement, the accompanying prospectus and the documents incorporated by reference in this prospectus supplement and the accompanying prospectus, including the historical financial statements and notes to those financial statements included or incorporated by reference in this prospectus supplement and the accompanying prospectus. You should read carefully the “Risk Factors” section on page S-4 of this prospectus supplement and the “Risk Factors” and “Information Regarding Forward-Looking Statements” sections in NiSource’s Annual Report on Form 10-K for the year ended December 31, 2009 and in NiSource’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2010, June 30, 2010 and September 30, 2010 for more information about important risks that you should consider before investing in the Notes. References to “NiSource” refer to NiSource Inc., and references to “NiSource Finance” refer to NiSource Finance Corp. Unless the context requires otherwise, “we,” “us” or “our” refer collectively to NiSource and its subsidiaries, including NiSource Finance.

NiSource Inc.

Overview. NiSource is an energy holding company whose subsidiaries provide natural gas, electricity and other products and services to approximately 3.8 million customers located within a corridor that runs from the Gulf Coast through the Midwest to New England. Our principal subsidiaries include Columbia Energy Group, a vertically-integrated natural gas distribution, transmission and storage holding company whose subsidiaries provide service to customers in the Midwest, the Mid-Atlantic and the Northeast; Northern Indiana Public Service Company, a vertically-integrated natural gas and electric company providing service to customers in northern Indiana; and Columbia Gas of Massachusetts (formerly known as Bay State Gas Company), a natural gas distribution company serving customers in Massachusetts. NiSource derives substantially all its revenues and earnings from the operating results of its subsidiaries. Our primary business segments are:


	•	gas distribution operations;

	•	gas transmission and storage operations; and

	•	electric operations.

Strategy. We have established four key initiatives to build a platform for long-term, sustainable growth: commercial and regulatory initiatives; commercial growth and expansion of the gas transmission and storage business; financial management of the balance sheet; and process and expense management.

Gas Distribution Operations. Our natural gas distribution operations serves approximately 3.3 million customers in seven states and operate approximately 58 thousand miles of pipeline. Through our wholly-owned subsidiary, Columbia Energy Group, we own five distribution subsidiaries that provide natural gas to approximately 2.2 million residential, commercial and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky and Maryland. We also distribute natural gas to approximately 792 thousand customers in northern Indiana through three subsidiaries: Northern Indiana Public Service Company, Kokomo Gas and Fuel Company and Northern Indiana Fuel and Light Company, Inc. Additionally, our subsidiary Columbia Gas of Massachusetts distributes natural gas to approximately 294 thousand customers in Massachusetts.

Gas Transmission and Storage. Our gas transmission and storage subsidiaries own and operate approximately 16 thousand miles of interstate pipelines and operate one of the nation’s largest underground natural gas storage systems, capable of storing approximately 639 billion cubic feet of natural gas. Through our subsidiaries Columbia Gas Transmission LLC, Columbia Gulf Transmission Company and Crossroads Pipeline Company, we own and operate an interstate pipeline network extending from the Gulf of Mexico to Lake Erie, New York and the eastern seaboard. Together, these companies serve customers in 16 Northeastern, Mid-Atlantic, Midwestern and Southern states and the District of Columbia.

S-1

Electric Operations. Through our subsidiary Northern Indiana Public Service Company, we generate, transmit and distribute electricity to approximately 457 thousand customers in 20 counties in the northern part of Indiana and engage in wholesale and transmission transactions. Northern Indiana Public Service Company owns four and operates three coal-fired electric generating stations. The three operating facilities have a net capability of 2,574 megawatts. Northern Indiana Public Service Company also operates Sugar Creek, a combined cycle gas turbine plant with a 535 megawatt capability rating, four gas-fired generating units located at Northern Indiana’s coal fired electric generating stations with a net capability of 203 megawatts and two hydroelectric generating plants with a net capability of 10 megawatts. These facilities provide for a total system operating net capability of 3,322 megawatts. Northern Indiana Public Service Company’s transmission system, with voltages from 69,000 to 345,000 volts, consists of 2,792 circuit miles. Northern Indiana Public Service Company is interconnected with five neighboring electric utilities. During the year ended December 31, 2009, Northern Indiana Public Service Company generated 85.2% and purchased 14.8% of its electric requirements.

NiSource Finance Corp.

NiSource Finance is a wholly-owned special purpose finance subsidiary of NiSource that engages in financing activities to raise funds for the business operations of NiSource and its subsidiaries. NiSource Finance’s obligations under the Notes will be fully and unconditionally guaranteed by NiSource. NiSource Finance was incorporated in March 2000 under the laws of the State of Indiana.

Our executive offices are located at 801 East 86th Avenue, Merrillville, Indiana 46410, telephone: (877) 647-5990.

Tender Offer for 10.75% Notes due 2016 and 6.80% Notes due 2019

On December 1, 2010, we announced our intent to commence, on or about the date hereof, a tender offer (the “Tender Offer”) to purchase for cash up to $250 million aggregate principal amount of our outstanding 10.75% Notes due 2016 (“2016 Notes”) and 6.80% Notes due 2019 (“2019 Notes”) in the priority and upon the terms and subject to the conditions set forth in an Offer to Purchase, dated December 1, 2010, and a related Letter of Transmittal. As of the date of this prospectus supplement, there are outstanding $600 million aggregate principal amount of 2016 Notes and $500 million aggregate principal amount of 2019 Notes. We intend to use the proceeds from our sale of the Notes offered hereby, as well as funds drawn under our revolving credit facility, to pay for the notes tendered pursuant to the Tender Offer.

Consummation of the Tender Offer will be subject to a number of conditions, including the issuance of the Notes offered hereby and the absence of certain adverse legal and market developments. We cannot provide any assurance as to whether we will complete the Tender Offer or as to the results thereof.

The sale of the Notes offered hereby is not conditioned on the completion of the Tender Offer.

The Tender Offer will only be made pursuant to the Offer to Purchase and related Letter of Transmittal, which will collectively contain the complete terms and conditions relating to the Tender Offer. The information set forth herein is for informational purposes only and is not soliciting any offer to participate in the Tender Offer.

Conflict of Interest

We intend to use the net proceeds to us from the sale of the Notes to purchase the 2016 Notes and 2019 Notes. Because 5% or more of the net proceeds may be paid to one or more underwriters participating in this offering, there may be a “conflict of interest” under Rule 2720 of the Conduct Rules of the National Association of Securities Dealers, Inc., which is administered by the Financial Industry Regulatory Authority, Inc. Accordingly, this offering will be made in compliance with the applicable provisions of Rule 2720. Please see the “Use of Proceeds” and “Conflict of Interest” sections of this prospectus supplement for more information.

S-2

The Offering


Issuer		NiSource Finance Corp.

Securities Offered		$250,000,000 aggregate principal amount of 6.25% Notes due 2040.

Guarantee		NiSource Inc. will fully and unconditionally guarantee all the obligations of NiSource Finance under the Notes.

Maturity Date		The Notes will mature on December 15, 2040.

Interest Rate		The interest rate on the Notes will be 6.25% per annum.

Interest Payment Dates		Each June 15 and December 15, beginning June 15, 2011.

Optional Redemption		We may redeem all or part of the Notes at any time at our option at a redemption price equal to the greater of (1) the principal amount of the notes being redeemed plus accrued interest to the redemption date and (2) a “make-whole” amount based on the yield of a comparable U.S. Treasury security plus 0.35%.

Ranking		The Notes will be senior, unsecured obligations of NiSource Finance ranking equally in right of payment with other senior indebtedness of NiSource Finance.

		The guarantees will be senior, unsecured obligations of NiSource, ranking equally in right of payment with other senior indebtedness of NiSource. Because NiSource is a holding company that derives substantially all of its income from operating subsidiaries, the guarantee will effectively be subordinated to debt and preferred stock at the subsidiary level.

		The Indenture does not limit the amount of debt that NiSource Finance, NiSource or any of its subsidiaries may incur.

Limitation on Liens		Subject to certain exceptions, neither NiSource Finance, NiSource nor any subsidiary of NiSource other than a utility may issue, assume or guarantee any secured debt, except intercompany indebtedness, without also securing the Notes, unless the total amount of all of the secured debt would not exceed 10% of our consolidated net tangible assets.

Use of Proceeds		The net proceeds to us from the sale of the Notes, after deducting the underwriting discount but before deducting other fees and expenses related to the offering, will be approximately $244.6 million. We intend to use the proceeds of the offering, as well as funds drawn under our revolving credit facility, to purchase 2016 Notes and, if less than $250 million aggregate principal amount of 2016 Notes are tendered, 2019 Notes pursuant to the Tender Offer.

Additional Notes		We may, without the consent of the holders of the Notes, create and issue additional Notes ranking equally with the Notes in all respects, including having the same CUSIP number, so that such additional Notes would be consolidated and form a single series with the Notes and would have the same terms as to status, redemption or otherwise as the Notes.

For additional information regarding the Notes, see “Supplemental Description of the Notes.”

S-3

RISK FACTORS

Investing in the Notes involves risk. Please see the “Risk Factors” and “Information Regarding Forward-Looking Statements” sections in NiSource’s Annual Report on Form 10-K for the fiscal year ended December 31, 2009 and in NiSource’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2010, June 30, 2010 and September 30, 2010, which are incorporated by reference in this prospectus supplement and the accompanying prospectus. Before making an investment decision, you should carefully consider these risks as well as other information contained or incorporated by reference in this prospectus supplement and the accompanying prospectus. In addition, the risk described below could result in a decrease in the value of the Notes and your investment therein.

The Notes and guarantees are obligations of NiSource Finance and NiSource, respectively, and not of our operating subsidiaries and will be effectively subordinated to the claims of the operating subsidiaries’ creditors.

The Notes and guarantees are obligations of NiSource Finance and NiSource, respectively, and not of our other subsidiaries. NiSource is a holding company and, accordingly, we conduct substantially all of our operations through our operating subsidiaries. NiSource Finance is a consolidated finance subsidiary, which has no independent operations other than its financing activities. As a result, our cash flow and our ability to service our debt, including the Notes, depend upon the earnings of our operating subsidiaries and on the distribution of earnings, loans or other payments by such subsidiaries to NiSource and NiSource Finance.

Our operating subsidiaries are separate and distinct legal entities and have no obligation to pay any amounts due on the Notes or to provide us with funds for our payment obligations, whether by dividends, distributions, loans or other payments. In addition, any payment of dividends, distributions, loans or advances by our subsidiaries to us could be subject to statutory or contractual restrictions. Payments to us by our operating subsidiaries will also be contingent upon such subsidiaries’ earnings and business considerations. As of September 30, 2010, our operating subsidiaries (which do not include NiSource Finance, NiSource Capital Markets, Inc. and NiSource Development Company) had approximately $460.3 million of indebtedness.

Our right to receive any assets of any of our subsidiaries upon their liquidation or reorganization, and therefore the rights of the holders of the Notes to participate in those assets, will be effectively subordinated to the claims of that subsidiary’s creditors. In addition, even if we were a creditor of any of our subsidiaries, our rights as a creditor would be subordinate to any security interest in the assets of our subsidiaries and any indebtedness of our subsidiaries senior to that held by us. If any of our subsidiaries were to issue preferred stock in the future, the Notes would similarly be effectively subordinated to the rights of the preferred stockholders.

There is no prior public market for the Notes, and we cannot assure you that any public market will develop or be sustained after the offering.

The Notes will constitute a new issue of securities without an established trading market. We have been advised by the underwriters that they may make a market in the Notes, but they have no obligation to do so and may discontinue market making at any time without providing notice. There can be no assurance that a market for the Notes will develop or, if it does develop, that it will continue. If an active public market does not develop, the market price and liquidity of the Notes may be adversely affected. Furthermore, we do not intend to apply for listing of the Notes on any securities exchange or automated quotation system.

S-4

INCORPORATION BY REFERENCE

The SEC allows us to “incorporate by reference” information into this prospectus supplement and the accompanying prospectus. This means that we can disclose important information to you by referring you to another document that NiSource has filed separately with the SEC. The information incorporated by reference is considered to be part of this prospectus supplement and the accompanying prospectus. Information that NiSource files with the SEC after the date of this prospectus supplement will automatically modify and supersede the information included or incorporated by reference in this prospectus supplement and the accompanying prospectus to the extent that the subsequently filed information modifies or supersedes the existing information. We incorporate by reference the following documents filed with the SEC:


	•	our Annual Report on Form 10-K for the fiscal year ended December 31, 2009;

	•	our Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, 2010, June 30, 2010 and September 30, 2010;

	•	our Current Reports on Form 8-K dated January 28, 2010, February 19, 2010, February 26, 2010, May 14, 2010, August 26, 2010 and September 14, 2010; and

	•	any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 until we sell all of the securities offered by this prospectus supplement.

You may request a copy of any of these filings at no cost by writing to or telephoning us at the following address and telephone number: Gary W. Pottorff, NiSource Inc., 801 East 86th Avenue, Merrillville, Indiana 46410, telephone: (877) 647-5990.

USE OF PROCEEDS

The net proceeds to us from the sale of the Notes, after deducting the underwriting discount but before deducting other fees and expenses related to the offering, will be approximately $244.6 million. We intend to use the proceeds of the offering, as well as funds drawn under our revolving credit facility, to purchase 2016 Notes and, if less than $250 million aggregate principal amount of 2016 Notes are tendered, 2019 Notes pursuant to the Tender Offer. This offering is not conditioned upon the completion of the Tender Offer. To the extent less than $250 million aggregate principal amount of 2016 Notes and 2019 Notes are tendered pursuant to the Tender Offer or the Tender Offer is not otherwise consummated, we intend to use the proceeds from this offering to repay short-term bank borrowings having an annual interest rate of 0.65% as of November 22, 2010 under our revolving credit facility that expires on July 7, 2011.

S-5

CAPITALIZATION

The following table shows our capitalization and short-term indebtedness at September 30, 2010 (1) on an actual consolidated basis and (2) on a consolidated basis as adjusted to reflect (i) the issuance and sale of $250 million principal amount of the Notes and (ii) the use of the net proceeds as set forth under “Use of Proceeds”, assuming the tender and purchase of $250 million of 2016 Notes pursuant to the Tender Offer. This table should be read in conjunction with our consolidated financial statements and related notes for the nine months ended September 30, 2010, incorporated by reference in this prospectus supplement and accompanying prospectus. See “Incorporation by Reference.”


	September 30, 2010
	Actual		As Adjusted(1)
	(in millions)

Cash and cash equivalents	$	10.9	$	10.9

Short-term borrowings (including current portion of long-term debt)	$	1,451.5	$	1,553.3

Long-term debt (excluding amounts due within one year)	$	5,964.3	$	5,962.4
Common stockholders’ equity		4,877.9		4,783.6

Total capitalization	$	10,842.2	$	10,746.0


(1)		Assumes that (i) $250 million aggregate principal amount of 2016 Notes are tendered and purchased in the Tender Offer prior to the early participation date for an aggregate purchase price of approximately $346.4 million, including fees and expenses related to the Tender Offer and accrued interest and (ii) the date and time for determining the purchase price for such 2016 Notes is 2:00 p.m., New York City time, on November 30, 2010.

S-6

RATIOS OF EARNINGS TO FIXED CHARGES

The following are ratios of our earnings to fixed charges for each of the periods indicated:


		Fiscal Year Ended December 31,
Nine Months Ended September 30, 2010		2009		2008		2007		2006		2005

	2.21		1.91		2.31		2.14		2.30		1.95

For purposes of calculating the ratio of earnings to fixed charges, “earnings” consist of income from continuing operations before income taxes plus fixed charges. “Fixed charges” consist of interest on all indebtedness, amortization of debt expense, the portion of rental expenses on operating leases deemed to be representative of the interest factor and preferred stock dividend requirements of consolidated subsidiaries.

S-7

SUPPLEMENTAL DESCRIPTION OF THE NOTES

Please read the following information concerning the Notes in conjunction with the statements under “Description of the Debt Securities” in the accompanying prospectus, which the following information supplements and, if there are any inconsistencies, supersedes. The following description is not complete. The Notes will be issued under the Indenture, dated November 14, 2000, that we have entered into with The Bank of New York Mellon (as successor in interest to JPMorgan Chase Bank, N.A., formerly known as The Chase Manhattan Bank), as trustee. The Indenture is described in the accompanying prospectus and is filed as an exhibit to the registration statement under which the Notes are being offered and sold.

Maturity, Interest and Payment

The Notes will mature on December 15, 2040. The Notes will bear interest at a rate of 6.25% per annum from and including December 8, 2010, payable semi-annually in arrears on June 15 and December 15 of each year, beginning June 15, 2011. Interest payable on each interest payment date for the Notes will be paid to the persons in whose name the Notes are registered at the close of business on each June 1 and December 1.

If an interest payment date falls on a day that is not a business day, interest will be payable on the next succeeding business day with the same force and effect as if made on such interest payment date. Interest on the Notes will be calculated on the basis of a 360-day year, consisting of twelve 30-day months.

Optional Redemption

We may redeem all or part of the Notes at any time at our option at a redemption price equal to the greater of (1) the principal amount of the Notes being redeemed plus accrued interest to the redemption date or (2) the Make-Whole Amount for the Notes being redeemed.

The following definitions apply to the Notes:

“Make-Whole Amount” means the sum, as determined by a Quotation Agent, of the present values of the principal amount of the Notes to be redeemed, together with scheduled payments of interest (exclusive of interest to the redemption date) from the redemption date to the maturity date of the Notes, in each case discounted to the redemption date on a semi-annual basis, assuming a 360-day year consisting of twelve 30-day months, at the Adjusted Treasury Rate, plus accrued interest on the principal amount of the Notes being redeemed to the redemption date.

“Adjusted Treasury Rate” means, with respect to any redemption date, (i) the yield, under the heading which represents the average for the immediately preceding week, appearing in the most recently published statistical release designated “H.15 (519)” or any successor publication which is published weekly by the Board of Governors of the Federal Reserve System and which establishes yields on actively traded United States Treasury securities adjusted to constant maturity under the caption “Treasury Constant Maturities,” for the maturity corresponding to the Comparable Treasury Issue (if no maturity is within three months before or after the remaining term of the Notes, yields for the two published maturities most closely corresponding to the Comparable Treasury Issue shall be determined and the Adjusted Treasury Rate shall be interpolated or extrapolated from such yields on a straight line basis, rounding to the nearest month) or (ii) if such release (or any successor release) is not published during the week preceding the calculation date or does not contain such yields, the rate per year equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date, in each case calculated on the third business day preceding the redemption date, plus 0.35%.

“Comparable Treasury Issue” means the United States Treasury security selected by the Quotation Agent as having a maturity comparable to the remaining term from the redemption date to the maturity date of the Notes that would be utilized, at the time of selection and in accordance with

S-8

customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Notes.

“Quotation Agent” means the Reference Treasury Dealer selected by us.

“Reference Treasury Dealer” means a primary U.S. Government securities dealer selected by us.

“Comparable Treasury Price” means, with respect to any redemption date, if clause (ii) of the definition of Adjusted Treasury Rate is applicable, the average of three, or such lesser number as is obtained by us, Reference Treasury Dealer Quotations for such redemption date.

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by a Reference Treasury Dealer, of the bid and asked prices for the Comparable Treasury Issue, expressed in each case as a percentage of its principal amount, quoted in writing to us by such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third business day preceding such redemption date.

Selection and Notice of Redemption

If we are redeeming less than all the Notes at any time, the trustee will select the Notes to be redeemed using a method it considers fair and appropriate.

We will redeem Notes in increments of $1,000. We will cause notices of redemption to be mailed by first-class mail at least 30 but not more than 60 days before the redemption date to each holder of Notes to be redeemed at its registered address.

If any Note is to be redeemed in part only, the notice of redemption that relates to that Note will state the portion of the principal amount thereof to be redeemed. We will issue a Note in principal amount equal to the unredeemed portion of the original Note in the name of the holder thereof upon cancellation of the original Note. Notes called for redemption will become due on the date fixed for redemption. On or after the redemption date, interest will cease to accrue on Notes or portions of them called for redemption.

Forms and Denominations

The Notes will be issued as one or more global securities in the name of a nominee of The Depository Trust Company and will be available only in book-entry form. See “Description of the Debt Securities — Book-Entry Issuance” in the accompanying prospectus. The Notes are available for purchase in multiples of $1,000.

Additional Notes

We may, without the consent of the holders of the Notes, create and issue additional Notes ranking equally with the Notes in all respects, including having the same CUSIP number, so that such additional Notes would be consolidated and form a single series with the Notes and would have the same terms as to status, redemption or otherwise as the Notes. No additional Notes may be issued if an Event of Default has occurred and is continuing with respect to the Notes.

S-9

CERTAIN ERISA CONSIDERATIONS

The following is a summary of certain considerations associated with the purchase of Notes by employee benefit plans that are subject to Title I of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), plans, individual retirement accounts and other arrangements that are subject to Section 4975 of the Internal Revenue Code of 1986, as amended (the “Code”), or provisions under any federal, state, local non-U.S. or other laws or regulations that are similar to such provisions of ERISA or the Code, and entities whose underlying assets are considered to include “plan assets” of such plans, accounts and arrangements (each, a “Plan”).

General Fiduciary Matters

ERISA and the Code impose certain duties on persons who are fiduciaries of a Plan subject to Title I of ERISA or Section 4975 of the Code (an “ERISA Plan”) and prohibit certain transactions involving the assets of an ERISA Plan and its fiduciaries or other interested parties. Under ERISA and the Code, any person who exercises any discretionary authority or control over the management or administration of such an ERISA Plan or the management or disposition of the assets of such an ERISA Plan, or who renders investment advice for a fee or other compensation to such an ERISA Plan, is generally considered to be a fiduciary of the ERISA Plan.

In considering an investment in the Notes of a portion of the assets of any Plan, a fiduciary should determine whether the investment is in accordance with the documents and instruments governing the Plan and the applicable provisions of ERISA, the Code or any similar law relating to a fiduciary’s duties to the Plan including, without limitation, the prudence, diversification, delegation of control and prohibited transaction provisions of ERISA, the Code and any other applicable similar laws.

Prohibited Transaction Issues

Section 406 of ERISA and Section 4975 of the Code prohibit ERISA Plans from engaging in specified transactions involving plan assets with persons or entities who are “parties in interest,” within the meaning of ERISA, or “disqualified persons,” within the meaning of Section 4975 of the Code, unless an exemption is available. A party in interest or disqualified person who engages in a non-exempt prohibited transaction may be subject to excise taxes and other penalties and liabilities under ERISA and the Code. In addition, the fiduciary of the ERISA Plan that engages in such a non-exempt prohibited transaction may be subject to penalties and liabilities under ERISA and the Code. The acquisition or holding of Notes by an ERISA Plan with respect to which NiSource, NiSource Finance or an underwriter is considered a party in interest or a disqualified person may constitute or result in a direct or indirect prohibited transaction under Section 406 of ERISA or Section 4975 of the Code, unless the investment is acquired and is held in accordance with an applicable statutory, class or individual prohibited transaction exemption. In this regard, the U.S. Department of Labor has issued prohibited transaction class exemptions, or “PTCEs,” that may apply to the acquisition and holding of the Notes. These class exemptions include PTCE 84-14 respecting transactions determined by independent qualified professional asset managers, PTCE 90-1 respecting insurance company pooled separate accounts, PTCE 91-38 respecting bank collective investment funds, PTCE 95-60 respecting life insurance company general accounts and PTCE 96-23 respecting transactions determined by in-house asset managers. In addition, the statutory exemption (the “Statutory Exemption”) under Section 408(b)(17) of ERISA or Section 4975(d)(20) of the Code for certain prohibited transactions between a plan and a person or entity that is a party in interest to such plan solely by reason of providing services to the plan or an affiliation with a service provider (other than a party in interest that is a fiduciary with respect to the assets of the plan involved in the transaction, or an affiliate of such a fiduciary), provided that there is adequate consideration for the transaction, may be applicable to the acquisition and holding of the Notes. There can be no assurance that a particular purchase of Notes will satisfy all of the conditions of any such exemptions.

Because of the foregoing, the Notes should not be purchased or held by any person investing “plan assets” of any Plan, unless such purchase and holding will not constitute a non-exempt prohibited transaction under ERISA and the Code or a violation of any applicable similar laws.

S-10

Representation

By acceptance of a Note, each purchaser and subsequent transferee of a Note will be deemed to have represented and warranted that either (i) no portion of the assets used by such purchaser or transferee to acquire and hold the Note constitutes assets of any Plan, or (ii) the purchase and holding of the Note by such purchaser or transferee will not constitute a non-exempt prohibited transaction under Section 406 of ERISA or Section 4975 of the Code or violate any applicable similar laws.

The foregoing discussion is general in nature and is not intended to be all-inclusive. Due to the complexity of these rules and the penalties that may be imposed upon persons involved in non-exempt prohibited transactions, it is particularly important that fiduciaries, or other persons considering purchasing the Notes on behalf of, or with the assets of, any Plan consult with their counsel regarding the potential applicability of ERISA, Section 4975 of the Code and any similar laws to such investment and whether an exemption would be applicable to the purchase and holding of the Notes.

S-11

UNDERWRITING

Subject to conditions set forth in the underwriting agreement, we have agreed to sell all, but not less than all, the Notes to the underwriters, and the underwriters have severally and not jointly agreed to purchase the principal amount of the Notes set forth opposite its name in the following table:


	Principal Amount
Underwriter	of Notes

Deutsche Bank Securities Inc.	$	93,750,000
RBS Securities Inc.	$	93,750,000
BNP Paribas Securities Corp.	$	15,625,000
KeyBanc Capital Markets Inc.	$	15,625,000
Mizuho Securities USA Inc.	$	15,625,000
PNC Capital Markets LLC	$	15,625,000

Total	$	250,000,000

The underwriting agreement provides that the underwriters are obligated to purchase all of the Notes if any are purchased. The underwriting agreement also provides that if an underwriter defaults the purchase commitments of non-defaulting underwriters may be increased or the offering of Notes may be terminated.

The underwriters propose to offer the Notes initially at the public offering price on the cover page of this prospectus supplement and to selling group members at that price less a selling concession of .500% of the principal amount per Note. The underwriters and selling group members may allow a discount of .250% of the principal amount per Note on sales to other broker/dealers. After the initial public offering, the underwriters may change the public offering price, selling concession and discount to broker/dealers.

We estimate that our total expenses for this offering, excluding the underwriting discount, will be approximately $225,000.

The Notes are a new issue of securities with no established trading market. One or more of the underwriters intends to make a secondary market for the Notes. However, they are not obligated to do so and may discontinue making a secondary market for the Notes at any time without notice. No assurance can be given as to how liquid the trading market for the Notes will be.

We have agreed to indemnify the underwriters against liabilities under the Securities Act of 1933, or contribute to payments which the underwriters may be required to make in that respect.

In connection with the offering, the underwriters may engage in stabilizing transactions, over-allotment transactions, syndicate covering transactions and penalty bids in accordance with Regulation M under the Exchange Act.


	•	Stabilizing transactions permit bids to purchase the underlying security so long as the stabilizing bids do not exceed a specific maximum.

	•	Over-allotment involves sales by the underwriters of Notes in excess of the principal amount of Notes the underwriters are obligated to purchase, which creates a syndicate short position.

	•	Syndicate covering transactions involve purchases of the Notes in the open market after the distribution has been completed in order to cover syndicate short positions. A short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the Notes in the open market after pricing that could adversely affect investors who purchase in the offering.

	•	Penalty bids permit the underwriters to reclaim a selling concession from a syndicate member when the Notes originally sold by the syndicate member are purchased in a stabilizing transaction or a syndicate covering transaction to cover syndicate short positions.

S-12

These stabilizing transactions, syndicate-covering transactions and penalty bids may have the effect of raising or maintaining the market price of the Notes or preventing or retarding a decline in the market prices of the Notes. As a result the price of the Notes may be higher than the prices that might otherwise exist in the open market. These transactions, if commenced, may be discontinued at any time.

It is expected that delivery of the Notes will be made against payment therefor on or about the date specified on the cover page of this prospectus supplement, which is the fifth business day following the date of this prospectus supplement (such settlement cycle being referred to as “T+5”). Under Rule 15(c)6-1 under the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in three business days unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes on the date of this prospectus supplement or the next succeeding business day will be required, by virtue of the fact that the Notes initially will settle in T+5, to specify an alternative settlement cycle at the time of any such trade to prevent failed settlement. Purchasers of the Notes who wish to trade the Notes on the date of this prospectus supplement or the next succeeding business day should consult their own advisors.

Other Relationships

Certain of the underwriters and their affiliates have provided certain investment banking, commercial banking and other financial services to us and our affiliates, for which they have received customary fees. In particular, Deutsche Bank Securities Inc. and RBS Securities Inc. are acting as dealer managers in connection with the Tender Offer. The underwriters and their affiliates may from time to time engage in future transactions with us and our affiliates and provide services to us and our affiliates in the ordinary course of their business.

In the ordinary course of their various business activities, the underwriters and their respective affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own accounts and for the accounts of their customers, and such investments and securities activities may involve our securities and/or instruments. The underwriters and their respective affiliates may also make investment recommendations and/or publish or express independent research views in respect to such securities or instruments and may at any time hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments.

Certain of the underwriters and their respective affiliates may receive proceeds from the Tender Offer to the extent they hold 2016 Notes or 2019 Notes and participate in the Tender Offer or to the extent they are lenders under our revolving credit facility that expires on July 7, 2011 and proceeds are used to repay short-term borrowings from such facility.

CONFLICT OF INTEREST

We intend to use the net proceeds to us from the sale of the Notes to purchase 2016 Notes and potentially 2019 Notes, and potentially to repay short-term bank borrowings as described above. Because 5% or more of the net proceeds may be paid to one or more underwriters participating in this offering, there may be a “conflict of interest” under Rule 2720 of the Conduct Rules of the National Association of Securities Dealers, Inc., which is administered by the Financial Industry Regulatory Authority, Inc. Accordingly, this offering will be made in compliance with the applicable provisions of Rule 2720. Any underwriter participating in the offering that receives 5% or more of the net offering proceeds will not confirm any sales to accounts over which it exercises discretionary authority without first receiving specific written approval for the transaction from those accounts. Please see the “Summary — Tender Offer for 10.75% Notes due 2016 and 6.8% Notes due 2019” and “Use of Proceeds” sections of this prospectus supplement for more information.

S-13

LEGAL MATTERS

The validity of the Notes will be passed upon for us by Schiff Hardin LLP, Chicago, Illinois. The underwriters have been represented by Dewey & LeBoeuf LLP, New York, New York.

EXPERTS

The consolidated financial statements and related financial statement schedules of NiSource Inc. and subsidiaries, incorporated in this prospectus supplement by reference from NiSource Inc.’s Annual Report on Form 10-K for the year ended December 31, 2009, and the effectiveness of NiSource Inc. and subsidiaries’ internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports, which are incorporated herein by reference. Such consolidated financial statements and financial statement schedules have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

S-14

PROSPECTUS

NiSource Inc.

Common Stock

Preferred Stock

Guarantees of Debt Securities

Warrants

Stock Purchase Contracts

Stock Purchase Units

NiSource Finance Corp.

Debt Securities
Guaranteed as Set Forth in this Prospectus by NiSource Inc.
Warrants

NiSource Inc. may offer, from time to time, in amounts, at prices and on terms that it will determine at the time of offering, any or all of the following:


	•	shares of common stock;

	•	shares of preferred stock, in one or more series;

	•	warrants to purchase common stock or preferred stock; and

	•	stock purchase contracts to purchase common stock, either separately or in units with the debt securities described below or U.S. Treasury securities.

NiSource Finance Corp., a wholly owned subsidiary of NiSource, may offer from time to time in amounts, at prices and on terms to be determined at the time of the offering:


	•	one or more series of its debt securities; and

	•	warrants to purchase debt securities.

NiSource will fully and unconditionally guarantee the obligations of NiSource Finance under any debt securities issued under this prospectus or any prospectus supplement.

We will provide specific terms of these securities, including their offering prices, in prospectus supplements to this prospectus. The prospectus supplements may also add, update or change information contained in this prospectus. You should read this prospectus and any prospectus supplement carefully before you invest.

We may offer these securities to or through underwriters, through dealers or agents, directly to you or through a combination of these methods. You can find additional information about our plan of distribution for the securities under the heading “Plan of Distribution” beginning on page 18 of this prospectus. We will also describe the plan of distribution for any particular offering of these securities in the applicable prospectus supplement. This prospectus may not be used to sell our securities unless it is accompanied by a prospectus supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is November 5, 2010.

TABLE OF CONTENTS


	Page

ABOUT THIS PROSPECTUS		2
WHERE YOU CAN FIND MORE INFORMATION		2
RISK FACTORS		3
FORWARD-LOOKING STATEMENTS		3
NISOURCE INC.		4
NISOURCE FINANCE CORP.		5
USE OF PROCEEDS		5
RATIOS OF EARNINGS TO FIXED CHARGES		5
DESCRIPTION OF CAPITAL STOCK		5
DESCRIPTION OF THE DEBT SECURITIES		7
DESCRIPTION OF WARRANTS		16
DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS		17
PLAN OF DISTRIBUTION		18
LEGAL OPINIONS		19
EXPERTS		19

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we have filed with the Securities and Exchange Commission, or SEC, utilizing a “shelf” registration or continuous offering process. Under this process, we may from time to time sell any combination of the securities described in this prospectus in one or more offerings.

This prospectus provides you with a general description of the common stock, preferred stock, debt securities, guarantees of debt securities, warrants, stock purchase contracts and stock purchase units we may offer. Each time we offer securities, we will provide a prospectus supplement that will contain specific information about the terms of that offering. That prospectus supplement may include a description of any risk factors or other special considerations applicable to those securities. The prospectus supplement may also add, update or change information contained in this prospectus. If there is any inconsistency between the information in the prospectus and the prospectus supplement, you should rely on the information in the prospectus supplement. You should read both this prospectus and the applicable prospectus supplement together with the additional information described under the heading “Where You Can Find More Information.”

The registration statement containing this prospectus, including the exhibits to the registration statement, provides additional information about us and the securities offered under this prospectus. The registration statement, including the exhibits, can be read at the SEC website or at the SEC’s public reference room offices mentioned under the heading “Where You Can Find More Information.”

You should rely only on the information incorporated by reference or provided in this prospectus and the accompanying prospectus supplement. We have not authorized anyone to provide you with different information. We are not making an offer to sell or soliciting an offer to buy these securities in any jurisdiction in which the offer or solicitation is not authorized or in which the person making the offer or solicitation is not qualified to do so or to anyone to whom it is unlawful to make the offer or solicitation. You should not assume that the information in this prospectus or the accompanying prospectus supplement is accurate as of any date other than the date on the front of the document.

References to “NiSource” refer to NiSource Inc., and references to “NiSource Finance” refer to NiSource Finance Corp. Unless the context requires otherwise, references to “we,” “us” or “our” refer collectively to NiSource and its subsidiaries, including NiSource Finance. References to “securities” refer collectively to the common stock, preferred stock, debt securities, guarantees of debt securities, warrants, stock purchase contracts and stock purchase units registered hereunder.

WHERE YOU CAN FIND MORE INFORMATION

NiSource files annual, quarterly and current reports, proxy statements and other information with the SEC. You may read and copy any document NiSource files at the SEC’s public reference room at 100 F Street, N.E., Washington, D.C. 20549. You may obtain additional information about the public reference room by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains a site on the internet (http://www.sec.gov) that contains reports, proxy and information statements and other information regarding issuers that file electronically with the SEC, including NiSource.

The SEC allows us to “incorporate by reference” information into this prospectus. This means that we can disclose important information to you by referring you to another document that NiSource has filed separately with the SEC. The information incorporated by reference is considered to be part of this prospectus. Information that NiSource files with the SEC after the date of this prospectus will automatically modify and supersede the information included or incorporated by reference in this prospectus to the extent that the subsequently filed information modifies or supersedes the existing information. We incorporate by reference the following documents filed with the SEC:


	•	our Annual Report on Form 10-K for the fiscal year ended December 31, 2009;

	•	our Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, 2010, June 30, 2010 and September 30, 2010;


	•	our Current Reports on Form 8-K dated January 28, 2010, February 19, 2010, February 26, 2010, May 14, 2010, August 26, 2010 and September 14, 2010; and

	•	any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 until we sell all of the securities.

We maintain an internet site at http://www.nisource.com which contains information concerning NiSource and its subsidiaries. The information contained at our internet site is not incorporated by reference in this prospectus, and you should not consider it a part of this prospectus.

We have filed this prospectus with the SEC as part of a registration statement on Form S-3 under the Securities Act of 1933. This prospectus does not contain all of the information included in the registration statement. Any statement made in this prospectus concerning the contents of any contract, agreement or other document is only a summary of the actual document. If we have filed any contract, agreement or other document as an exhibit to the registration statement, you should read the exhibit for a more complete understanding of the document or matter involved. Each statement regarding a contract, agreement or other document is qualified in its entirety by reference to the actual document.

RISK FACTORS

Investing in the securities involves risk. You should read carefully the “Risk Factors” and “Information Regarding Forward-Looking Statements” sections in NiSource’s Annual Report on Form 10-K for the fiscal year ended December 31, 2009 and in NiSource’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2010, June 30, 2010 and September 30, 2010, which are incorporated by reference in this prospectus. Before making an investment decision, you should carefully consider these risks as well as other information contained or incorporated by reference in this prospectus. The prospectus supplement applicable to each type or series of securities we offer may contain a discussion of additional risks applicable to an investment in us and the particular type of securities we are offering under that prospectus supplement.

FORWARD-LOOKING STATEMENTS

Some of the information included in this prospectus, in any prospectus supplement and in the documents incorporated by reference are “forward-looking statements” within the meaning of the 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. These forward-looking statements include, but are not limited to, statements concerning NiSource’s plans, objectives, expected performance, expenditures and recovery of expenditures through rates, stated on either a consolidated or segment basis, and any and all underlying assumptions and other statements that are other than statements of historical fact. From time to time, NiSource may publish or otherwise make available forward-looking statements of this nature. All such subsequent forward-looking statements, whether written or oral and whether made by or on behalf of NiSource, are also expressly qualified by these cautionary 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.

Realization of NiSource’s objectives and expected performance is subject to a wide range of risks and can be adversely affected by, among other things, weather, fluctuations in supply and demand for energy commodities, growth opportunities for NiSource’s businesses, increased competition in deregulated energy markets, the success of regulatory and commercial initiatives, dealings with third parties over whom NiSource has no control, actual operating experience of NiSource’s assets, the regulatory process, regulatory and legislative changes, the impact of potential new environmental laws or regulations, the results of material litigation, changes in pension funding requirements, changes in general economic, capital and commodity market conditions, counterparty credit risk, and

the matters set forth in the “Risk Factors” sections of NiSource’s 2009 Form 10-K and 2010 Forms 10-Q, many of which risks are beyond the control of NiSource. In addition, the relative contributions to profitability by each segment, and the assumptions underlying the forward-looking statements relating thereto, may change over time.

Accordingly, you should not rely on the accuracy of predictions contained in forward-looking statements. These statements speak only as of the date of this prospectus, the date of the accompanying prospectus supplement or, in the case of documents incorporated by reference, the date of those documents.

NISOURCE INC.


	•	gas distribution operations;

	•	gas transmission and storage operations; and

	•	electric operations.

Gas Distribution Operations. Our natural gas distribution operations serve more than 3.3 million customers in seven states and operate approximately 58 thousand miles of pipeline. Through our wholly-owned subsidiary, Columbia Energy Group, we own five distribution subsidiaries that provide natural gas to approximately 2.2 million residential, commercial and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky and Maryland. We also distribute natural gas to approximately 792 thousand customers in northern Indiana through three subsidiaries: Northern Indiana Public Service Company, Kokomo Gas and Fuel Company and Northern Indiana Fuel and Light Company, Inc. Additionally, our subsidiary Columbia Gas of Massachusetts distributes natural gas to approximately 294 thousand customers in Massachusetts.

neighboring electric utilities. During the year ended December 31, 2009, Northern Indiana Public Service Company generated 85.2% and purchased 14.8% of its electric requirements.

Our executive offices are located at 801 East 86th Avenue, Merrillville, Indiana 46410, telephone: (877) 647-5990.

NISOURCE FINANCE CORP.

NiSource Finance is a wholly-owned special purpose finance subsidiary of NiSource that engages in financing activities to raise funds for the business operations of NiSource and its subsidiaries. NiSource Finance’s obligations under the debt securities will be fully and unconditionally guaranteed by NiSource. NiSource Finance was incorporated in March 2000 under the laws of the State of Indiana.

USE OF PROCEEDS

Unless otherwise described in the applicable prospectus supplement, we will use the net proceeds from the sale of securities offered by this prospectus and any applicable prospectus supplement for general corporate purposes, including additions to working capital and repayment of existing indebtedness.

RATIOS OF EARNINGS TO FIXED CHARGES

The following are ratios of our earnings to fixed charges for each of the periods indicated:


Nine Months Ended	Fiscal Year Ended December 31
September 30, 2010	2009		2008		2007		2006		2005

2.21		1.91		2.31		2.14		2.30		1.95

DESCRIPTION OF CAPITAL STOCK

General

The authorized capital stock of NiSource consists of 420,000,000 shares, $0.01 par value, of which 400,000,000 are common stock and 20,000,000 are preferred stock. The board of directors has designated 4,000,000 shares of the preferred stock as Series A Junior Participating Preferred Shares. These shares were reserved for issuance upon the exercise of rights under NiSource’s Shareholder Rights Plan. As of November 29, 2006, no rights may be exercised under NiSource’s Shareholder Rights Plan.

Anti-Takeover Provisions

The certificate of incorporation of NiSource includes provisions that may have the effect of deterring hostile takeovers or delaying or preventing changes in control of management of NiSource. Members of NiSource’s board of directors may be removed only for cause by the affirmative vote of 80% of the combined voting power of all of the then-outstanding shares of stock of NiSource voting together as a single class. Unless the board of directors determines otherwise or except as otherwise required by law, vacancies on the board or newly-created directorships may be filled only by the affirmative vote of directors then in office, even though less than a quorum. If the board of directors or applicable Delaware law confers power on the stockholders of NiSource to fill such a vacancy or newly-created directorship, it may be filled only by the affirmative vote of 80% of the combined voting power of the outstanding shares of stock of NiSource entitled to vote. Stockholders may not cumulate their votes, and stockholder action may be taken only at a duly called meeting and not by written consent. In addition, NiSource’s bylaws contain requirements for advance notice of stockholder proposals and director nominations. These and other

provisions of the certificate of incorporation and bylaws and Delaware law could discourage potential acquisition proposals and could delay or prevent a change in control of management of NiSource.

NiSource is subject to the provisions of Section 203 of the Delaware General Corporation Law regulating corporate takeovers. Section 203 prevents certain Delaware corporations, including those whose securities are listed on a national securities exchange, such as the New York Stock Exchange, from engaging, under certain circumstances, in a “business combination,” which includes a merger or sale of more than 10% of the corporation’s assets, with any interested stockholder for three years following the date that the stockholder became an interested stockholder. An interested stockholder is a stockholder who acquired 15% or more of the corporation’s outstanding voting stock without the prior approval of the corporation’s board of directors.

The following summaries of provisions of our common stock and preferred stock are not necessarily complete. You are urged to read carefully NiSource’s certificate of incorporation and bylaws which are incorporated by reference as exhibits to the registration statement of which this prospectus is a part.

Common Stock

NiSource common stock is listed on the New York Stock Exchange under the symbol “NI.” Common stockholders may receive dividends if and when declared by the board of directors. Dividends may be paid in cash, stock or other form. In certain cases, common stockholders may not receive dividends until obligations to any preferred stockholders have been satisfied. All common stock will be fully paid and non-assessable. Each share of common stock is entitled to one vote in the election of directors and other matters. Common stockholders are not entitled to preemptive rights or cumulative voting rights. Common stockholders will be notified of any stockholders’ meeting according to applicable law. If NiSource liquidates, dissolves or winds-up its business, either voluntarily or involuntarily, common stockholders will share equally in the assets remaining after creditors and preferred stockholders are paid.

Preferred Stock

The board of directors can, without approval of stockholders, issue one or more series of preferred stock. The board can also determine the number of shares of each series and the rights, preferences and limitations of each series, including any dividend rights, voting rights, conversion rights, redemption rights and liquidation preferences, the number of shares constituting each series and the terms and conditions of issue. In some cases, the issuance of preferred stock could delay a change in control of NiSource and make it harder to remove incumbent management. Under certain circumstances, preferred stock could also restrict dividend payments to holders of common stock. All preferred stock will be fully paid and non-assessable.

The terms of the preferred stock that NiSource may offer will be established by or pursuant to a resolution of the board of directors of NiSource and will be issued under certificates of designations or through amendments to NiSource’s certificate of incorporation. If NiSource uses this prospectus to offer preferred stock, an accompanying prospectus supplement will describe the specific terms of the preferred stock. NiSource will also indicate in the supplement whether the general terms and provisions described in this prospectus apply to the preferred stock that NiSource may offer.

The following terms of the preferred stock, as applicable, will be set forth in a prospectus supplement relating to the preferred stock:


	•	the title and stated value;

	•	the number of shares NiSource is offering;

	•	the liquidation preference per share;

	•	the purchase price;

	•	the dividend rate, period and payment date, and method of calculation of dividends;

	•	whether dividends will be cumulative or non-cumulative and, if cumulative, the date from which dividends will accumulate;


	•	the procedures for any auction and remarketing, if any;

	•	the provisions for a sinking fund, if any;

	•	the provisions for redemption or repurchase, if applicable, and any restrictions on NiSource’s ability to exercise those redemption and repurchase rights;

	•	any listing of the preferred stock on any securities exchange or market;

	•	voting rights, if any;

	•	preemptive rights, if any;

	•	restrictions on transfer, sale or other assignment, if any;

	•	whether interests in the preferred stock will be represented by depositary shares;

	•	a discussion of any material or special United States federal income tax considerations applicable to the preferred stock;

	•	the relative ranking and preferences of the preferred stock as to dividend or liquidation rights;

	•	any limitations on issuance of any class or series of preferred stock ranking senior to or on a parity with the series of preferred stock as to dividend or liquidation rights; and

	•	any other material specific terms, preferences, rights or limitations of, or restrictions on, the preferred stock.

The terms, if any, on which the preferred stock may be exchanged for or converted into shares of common stock or any other security and, if applicable, the conversion or exchange price, or how it will be calculated, and the conversion or exchange period will be set forth in the applicable prospectus supplement.

The preferred stock or any series of preferred stock may be represented, in whole or in part, by one or more global certificates, which will have an aggregate liquidation preference equal to that of the preferred stock represented by the global certificate.

Each global certificate will:


	•	be registered in the name of a depositary or a nominee of the depositary identified in the prospectus supplement;

	•	be deposited with such depositary or nominee or a custodian for the depositary; and

	•	bear a legend regarding the restrictions on exchanges and registration of transfer and any other matters as may be provided for under the certificate of designations.

DESCRIPTION OF THE DEBT SECURITIES

NiSource Finance may issue the debt securities, in one or more series, from time to time under an Indenture, dated as of November 14, 2000, among NiSource Finance, NiSource, as guarantor, and The Bank of New York Mellon (as successor in interest to JPMorgan Chase Bank, N.A., formerly known as The Chase Manhattan Bank), as trustee. The Bank of New York Mellon, as trustee under the Indenture, will act as indenture trustee for the purposes of the Trust Indenture Act. We have incorporated by reference the Indenture as an exhibit to the registration statement of which this prospectus is a part.

This section briefly summarizes some of the terms of the debt securities and the Indenture. This section does not contain a complete description of the debt securities or the Indenture. The description of the debt securities is qualified in its entirety by the provisions of the Indenture. References to section numbers in this description of the debt securities, unless otherwise indicated, are references to section numbers of the Indenture.

General

The Indenture does not limit the amount of debt securities that may be issued. The Indenture provides for the issuance of debt securities from time to time in one or more series. The terms of each series of debt securities may be established in a supplemental indenture or in resolutions of NiSource Finance’s board of directors or a committee of the board.

The debt securities:


	•	are direct senior unsecured obligations of NiSource Finance;

	•	are equal in right of payment to any other senior unsecured obligations of NiSource Finance; and

	•	are guaranteed on a senior unsecured basis by NiSource.

NiSource Finance is a special purpose financing subsidiary formed solely as a financing vehicle for NiSource and its subsidiaries. Therefore, the ability of NiSource Finance to pay its obligations under the debt securities is dependent upon the receipt by it of payments from NiSource. If NiSource were not to make such payments for any reason, the holders of the debt securities would have to rely on the enforcement of NiSource’s guarantee described below.

If NiSource Finance uses this prospectus to offer debt securities, an accompanying prospectus supplement will describe the following terms of the debt securities being offered, to the extent applicable:


	•	the title;

	•	any limit on the aggregate principal amount;

	•	the date or dates on which NiSource Finance will pay principal;

	•	the right, if any, to extend the date or dates on which NiSource Finance will pay principal;

	•	the interest rates or the method of determining them and the date interest begins to accrue;

	•	the interest payment dates and the regular record dates for any interest payment dates;

	•	the right, if any, to extend the interest payment periods and the duration of any extension;

	•	the place or places where NiSource Finance will pay principal and interest;

	•	the terms and conditions of any optional redemption, including the date after which, and the price or prices at which, NiSource Finance may redeem securities;

	•	the terms and conditions of any optional purchase or repayment, including the date after which, and the price or prices at which, holders may require NiSource Finance to purchase, or a third party may require holders to sell, securities;

	•	the terms and conditions of any mandatory or optional sinking fund redemption, including the date after which, and the price or prices at which, NiSource Finance may redeem securities;

	•	whether bearer securities will be issued;

	•	the denominations in which NiSource Finance will issue securities;

	•	the currency or currencies in which NiSource Finance will pay principal and interest;

	•	any index or indices used to determine the amount of payments;

	•	the portion of principal payable on declaration of acceleration of maturity;

	•	any additional events of default or covenants of NiSource Finance or NiSource applicable to the debt securities;


	•	whether NiSource Finance will pay additional amounts in respect of taxes and similar charges on debt securities held by a United States alien and whether NiSource Finance may redeem those debt securities rather than pay additional amounts;

	•	whether NiSource Finance will issue the debt securities in whole or in part in global form and, in such case, the depositary for such global securities and the circumstances under which beneficial owners of interests in the global security may exchange such interest for securities;

	•	the date or dates after which holders may convert the securities into shares of NiSource common stock or preferred stock and the terms for that conversion; and

	•	any other terms of the securities.

The Indenture does not give holders of debt securities protection in the event of a highly leveraged transaction or other transaction involving NiSource Finance or NiSource. The Indenture also does not limit the ability of NiSource Finance or NiSource to incur indebtedness or to declare or pay dividends on its capital stock.

Guarantee of NiSource

NiSource will fully and unconditionally guarantee to each holder of debt securities and to the indenture trustee and its successors all the obligations of NiSource Finance under the debt securities, including the due and punctual payment of the principal of, and premium, if any, and interest, if any, on the debt securities. The guarantee applies whether the payment is due at maturity, on an interest payment date or as a result of acceleration, redemption or otherwise. The guarantee includes payment of interest on the overdue principal of and interest, if any, on the debt securities (if lawful) and all other obligations of NiSource Finance under the Indenture. The guarantee will remain valid even if the Indenture is found to be invalid. NiSource is obligated under the guarantee to pay any guaranteed amount immediately after NiSource Finance’s failure to do so.

NiSource is a holding company with no independent business operations or source of income of its own. It conducts substantially all of its operations through its subsidiaries and, as a result, NiSource depends on the earnings and cash flow of, and dividends or distributions from, its subsidiaries to provide the funds necessary to meet its debt and contractual obligations. A substantial portion of NiSource’s consolidated assets, earnings and cash flow is derived from the operation of its regulated utility subsidiaries, whose legal authority to pay dividends or make other distributions to NiSource is subject to regulatory restrictions. Such regulatory restrictions include a requirement imposed in the August 25, 2010 order of the Indiana Utility Regulatory Commission issued in the electric rate case filed by Northern Indiana Public Service Company. This order provides that, before Northern Indiana Public Service Company may declare or pay any dividend, it must file a report with the IURC detailing the proposed dividend and certain financial information. If within 20 calendar days the IURC does not initiate a proceeding to further explore the implications of the proposed dividend, it will be deemed approved. In addition, Northern Indiana Public Service Company’s debt indenture provides that Northern Indiana Public Service Company will not declare or pay any dividends on its common stock owned by NiSource except out of earned surplus or net profits.

NiSource’s holding company status also means that its right to participate in any distribution of the assets of any of its subsidiaries upon liquidation, reorganization or otherwise is subject to the prior claims of the creditors of each of the subsidiaries (except to the extent that the claims of NiSource itself as a creditor of a subsidiary may be recognized). Since this is true for NiSource, it is also true for the creditors of NiSource (including the holders of the debt securities).

Conversion Rights

The terms, if any, on which a series of debt securities may be exchanged for or converted into shares of common stock or preferred stock of NiSource will be set forth in the applicable prospectus supplement.

Denomination, Registration and Transfer

NiSource Finance may issue the debt securities as registered securities in certificated form or as global securities as described under the heading “Book-Entry Issuance.” Unless otherwise specified in the applicable

prospectus supplement, NiSource Finance will issue registered debt securities in denominations of $1,000 or integral multiples of $1,000. (See Section 302.)

If NiSource Finance issues the debt securities as registered securities, NiSource Finance will keep at one of its offices or agencies a register in which it will provide for the registration and transfer of the debt securities. NiSource Finance will appoint that office or agency the security registrar for the purpose of registering and transferring the debt securities.

The holder of any registered debt security may exchange the debt security for registered debt securities of the same series having the same stated maturity date and original issue date, in any authorized denominations, in like tenor and in the same aggregate principal amount. The holder may exchange those debt securities by surrendering them in a place of payment maintained for this purpose at the office or agency NiSource Finance has appointed securities registrar. Holders may present the debt securities for exchange or registration of transfer, duly endorsed or accompanied by a duly executed written instrument of transfer satisfactory to NiSource Finance and the securities registrar. No service charge will apply to any exchange or registration of transfer, but NiSource Finance may require payment of any taxes and other governmental charges as described in the Indenture. (See Section 305.)

If debt securities of any series are redeemed, NiSource Finance will not be required to issue, register transfer of or exchange any debt securities of that series during the 15 business day period immediately preceding the day the relevant notice of redemption is given. That notice will identify the serial numbers of the debt securities being redeemed. After notice is given, NiSource Finance will not be required to issue, register the transfer of or exchange any debt securities that have been selected to be either partially or fully redeemed, except the unredeemed portion of any debt security being partially redeemed. (See Section 305.)

Payment and Paying Agents

Unless otherwise indicated in the applicable prospectus supplement, on each interest payment date, NiSource Finance will pay interest on each debt security to the person in whose name that debt security is registered as of the close of business on the record date relating to that interest payment date. If NiSource Finance defaults in the payment of interest on any debt security, it may pay that defaulted interest to the registered owner of that debt security:


	•	as of the close of business on a date that the indenture trustee selects, which may not be more than 15 days or less than 10 days before the date NiSource Finance proposes to pay the defaulted interest, or

	•	in any other lawful manner that does not violate the requirements of any securities exchange on which that debt security is listed and that the indenture trustee believes is acceptable.

(See Section 307.)

Unless otherwise indicated in the applicable prospectus supplement, NiSource Finance will pay the principal of and any premium or interest on the debt securities when they are presented at the office of the indenture trustee, as paying agent. NiSource Finance may change the place of payment of the debt securities, appoint one or more additional paying agents, and remove any paying agent.

Redemption

The applicable prospectus supplement will contain the specific terms on which NiSource Finance may redeem a series of debt securities prior to its stated maturity. NiSource Finance will send a notice of redemption to holders at least 30 days but not more than 60 days prior to the redemption date. The notice will state:


	•	the redemption date;

	•	the redemption price;

	•	if less than all of the debt securities of the series are being redeemed, the particular debt securities to be redeemed (and the principal amounts, in the case of a partial redemption);


	•	that on the redemption date, the redemption price will become due and payable and any applicable interest will cease to accrue on and after that date;

	•	the place or places of payment; and

	•	whether the redemption is for a sinking fund.

(See Section 1104.)

On or before any redemption date, NiSource Finance will deposit an amount of money with the indenture trustee or with a paying agent sufficient to pay the redemption price. (See Section 1105.)

If NiSource Finance is redeeming less than all the debt securities, the indenture trustee will select the debt securities to be redeemed using a method it considers fair and appropriate. After the redemption date, holders of redeemed debt securities will have no rights with respect to the debt securities except the right to receive the redemption price and any unpaid interest to the redemption date. (See Section 1103.)

Consolidation, Merger, Conveyance, Transfer or Lease

Neither NiSource Finance nor NiSource shall consolidate or merge with any other corporation or convey, transfer or lease substantially all of its assets or properties to any entity unless:


	•	that corporation or entity is organized under the laws of the United States or any state thereof;

	•	that corporation or entity assumes NiSource Finance’s or NiSource’s obligations, as applicable, under the Indenture;

	•	after giving effect to the transaction, NiSource Finance and NiSource are not in default under the Indenture; and

	•	NiSource Finance or NiSource, as applicable, delivers to the indenture trustee an officer’s certificate and an opinion of counsel to the effect that the transaction complies with the Indenture.

(See Section 801.)

Limitation on Liens

As long as any debt securities remain outstanding, neither NiSource Finance, NiSource nor any subsidiary of NiSource other than a utility may issue, assume or guarantee any debt secured by any mortgage, security interest, pledge, lien or other encumbrance on any property owned by NiSource Finance, NiSource or that subsidiary, except intercompany indebtedness, without also securing the debt securities equally and ratably with (or prior to) the new debt, unless the total amount of all of the secured debt would not exceed 10% of the consolidated net tangible assets of NiSource and its subsidiaries (other than utilities).

In addition, the lien limitations do not apply to NiSource Finance’s, NiSource’s and any subsidiary’s ability to do the following:


	•	create mortgages on any property and on certain improvements and accessions on such property acquired, constructed or improved after the date of the Indenture;

	•	assume existing mortgages on any property or indebtedness of an entity which is merged with or into, or consolidated with NiSource Finance, NiSource or any subsidiary;

	•	assume existing mortgages on any property or indebtedness of an entity existing at the time it becomes a subsidiary;

	•	create mortgages to secure debt of a subsidiary to NiSource or to another subsidiary;

	•	create mortgages in favor of governmental entities to secure payment under a contract or statute or mortgages to secure the financing of constructing or improving property, including mortgages for pollution control or industrial revenue bonds;


	•	create mortgages to secure debt of NiSource or its subsidiaries maturing within 12 months and created in the ordinary course of business;

	•	create mortgages to secure the cost of exploration, drilling or development of natural gas, oil or other mineral property;

	•	to continue mortgages existing on the date of the Indenture; and

	•	create mortgages to extend, renew or replace indebtedness secured by any mortgage referred to above provided that the principal amount of indebtedness and the property securing the indebtedness shall not exceed the amount secured by the mortgage being extended, renewed or replaced.

(See Section 1008.)

Events of Default

The Indenture provides, with respect to any outstanding series of debt securities, that any of the following events constitutes an “Event of Default”:


	•	NiSource Finance defaults in the payment of any interest upon any debt security of that series that becomes due and payable and the default continues for 60 days;

	•	NiSource Finance defaults in the payment of principal of or any premium on any debt security of that series when due at its maturity, on redemption, by declaration or otherwise and the default continues for three business days;

	•	NiSource Finance defaults in the deposit of any sinking fund payment when due and the default continues for three business days;

	•	NiSource Finance or NiSource defaults in the performance of or breaches any covenant or warranty in the Indenture for 90 days after written notice to NiSource Finance and NiSource from the indenture trustee or to NiSource Finance, NiSource and the indenture trustee from the holders of at least 33% of the outstanding debt securities of that series;

	•	NiSource Finance or NiSource Capital Markets, Inc., a subsidiary of NiSource, defaults under any bond, debenture, note or other evidence of indebtedness for money borrowed by NiSource Finance or NiSource Capital Markets, or NiSource Finance or NiSource Capital Markets defaults under any mortgage, indenture or instrument under which there may be issued, secured or evidenced indebtedness constituting a failure to pay in excess of $50,000,000 of the principal or interest when due and payable, and in the event such debt has become due as the result of an acceleration, such acceleration is not rescinded or annulled or such debt is not paid within 60 days after written notice to NiSource Finance and NiSource from the indenture trustee or to NiSource Finance, NiSource and the indenture trustee from the holders of at least 33% of the outstanding debt securities of that series;

	•	the NiSource guarantee ceases to be in full force and effect in any material respect or is disaffirmed or denied (other than according to its terms), or is found to be unenforceable or invalid; or

	•	certain events of bankruptcy, insolvency or reorganization of NiSource Finance, NiSource Capital Markets or NiSource.

(See Section 501.)

If an Event of Default occurs with respect to debt securities of a particular series, the indenture trustee or the holders of 33% in principal amount of the outstanding debt securities of that series may declare the debt securities of that series due and payable immediately. (See Section 502.)

The holders of a majority in principal amount of the outstanding debt securities of a particular series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the indenture trustee under the Indenture, or exercising any trust or power conferred on the indenture trustee with respect to the debt securities of that series. The indenture trustee may refuse to follow directions that are in conflict

with law or the Indenture, that expose the indenture trustee to personal liability or that are unduly prejudicial to other holders. The indenture trustee may take any other action it deems proper that is not inconsistent with those directions. (See Section 512.)

The holders of a majority in principal amount of the outstanding debt securities of any series may waive any past default under the Indenture and its consequences, except a default:


	•	in respect of a payment of principal of, or premium, if any, or interest on any debt security; or

	•	in respect of a covenant or provision that cannot be modified or amended without the consent of the holder of each affected debt security.

(See Section 513.)

At any time after the holders of the debt securities of a series declare that the debt securities of that series are due and immediately payable, a majority in principal amount of the outstanding holders of debt securities of that series may rescind and cancel the declaration and its consequences: (1) before the indenture trustee has obtained a judgment or decree for money, (2) if all defaults (other than the non-payment of principal which has become due solely by reason of the declaration) have been waived or cured, and (3) NiSource or NiSource Finance has paid or deposited with the indenture trustee an amount sufficient to pay:


	•	all overdue interest on the debt securities of that series;

	•	the principal of, and premium, if any, or interest on any debt securities of that series which are due other than by reason of the declaration;

	•	interest on overdue interest (if lawful); and

	•	sums paid or advanced by and amounts due to the indenture trustee under the Indenture.

(See Section 502.)

Modification of Indenture

NiSource Finance, NiSource and the indenture trustee may modify or amend the Indenture, without the consent of the holders of any debt securities, for any of the following purposes:


	•	to evidence the succession of another person as obligor under the Indenture;

	•	to add to NiSource Finance’s or NiSource’s covenants or to surrender any right or power conferred on NiSource Finance or NiSource under the Indenture;

	•	to add events of default;

	•	to add or change any provisions of the Indenture to provide that bearer securities may be registrable as to principal, to change or eliminate any restrictions on the payment of principal or premium on registered securities or of principal or premium or any interest on bearer securities, to permit registered securities to be exchanged for bearer securities or to permit the issuance of securities in uncertificated form (so long as the modification or amendment does not materially adversely affect the interest of the holders of debt securities of any series);

	•	to change or eliminate any provisions of the Indenture (so long as there are no outstanding debt securities entitled to the benefit of the provision);

	•	to secure the debt securities;

	•	to establish the form or terms of debt securities of any series;

	•	to evidence or provide for the acceptance or appointment by a successor indenture trustee or facilitate the administration of the trusts under the Indenture by more than one indenture trustee;

	•	to cure any ambiguity, defect or inconsistency in the Indenture (so long as the cure or modification does not materially adversely affect the interest of the holders of debt securities of any series);


	•	to effect assumption by NiSource or one of its subsidiaries of NiSource Finance’s obligations under the Indenture; or

	•	to conform the Indenture to any amendment of the Trust Indenture Act.

(See Section 901.)

The Indenture provides that we and the indenture trustee may amend the Indenture or the debt securities with the consent of the holders of a majority in principal amount of the then outstanding debt securities of each series affected by the amendment voting as one class. However, without the consent of each holder of any outstanding debt securities affected, an amendment or modification may not, among other things:


	•	change the stated maturity of the principal or interest on any debt security;

	•	reduce the principal amount of, rate of interest on, or premium payable upon the redemption of any debt security;

	•	change the method of calculating the rate of interest on any debt security;

	•	change any obligation of NiSource Finance to pay additional amounts in respect of any debt security;

	•	reduce the principal amount of a discount security that would be payable upon acceleration of its maturity;

	•	change the place or currency of payment of principal of, or any premium or interest on, any debt security;

	•	impair a holder’s right to institute suit for the enforcement of any payment after the stated maturity or after any redemption date or repayment date;

	•	reduce the percentage of holders of debt securities necessary to modify or amend the Indenture or to consent to any waiver under the Indenture;

	•	change any obligation of NiSource Finance to maintain an office or agency in each place of payment or to maintain an office or agency outside the United States;

	•	modify the obligations of NiSource under its guarantee in any way adverse to the interests of the holders of the debt securities; and

	•	modify these requirements or reduce the percentage of holders of debt securities necessary to waive any past default of certain covenants.

(See Section 902.)

Satisfaction and Discharge

Under the Indenture, NiSource Finance can terminate its obligations with respect to debt securities of any series not previously delivered to the indenture trustee for cancellation when those debt securities:


	•	have become due and payable;

	•	will become due and payable at their stated maturity within one year; or

	•	are to be called for redemption within one year under arrangements satisfactory to the indenture trustee for giving notice of redemption.

NiSource Finance may terminate its obligations with respect to the debt securities of that series by depositing with the indenture trustee, as trust funds dedicated solely for that purpose, an amount sufficient to pay and discharge the entire indebtedness on the debt securities of that series. In that case, the Indenture will cease to be of further effect and NiSource Finance’s obligations will be satisfied and discharged with respect to that series (except as to NiSource Finance’s obligations to pay all other amounts due under the Indenture and to provide certain officers’ certificates and opinions of counsel to the indenture trustee). At the expense of NiSource Finance, the indenture trustee will execute proper instruments acknowledging the satisfaction and discharge.

(See Section 401.)

Book-Entry Issuance

Unless otherwise specified in the applicable prospectus supplement, NiSource Finance will issue any debt securities offered under this prospectus as “global securities.” We will describe the specific terms for issuing any debt security as a global security in the prospectus supplement relating to that debt security.

Unless otherwise specified in the applicable prospectus supplement, The Depository Trust Company, or DTC, will act as the depositary for any global securities. NiSource Finance will issue global securities as fully registered securities registered in the name of DTC’s nominee, Cede & Co. NiSource Finance will issue one or more fully registered global securities for each issue of debt securities, each in the aggregate principal or stated amount of such issue, and will deposit the global securities with DTC.

DTC is a limited-purpose trust company organized under the New York Banking Law, a “banking organization” within the meaning of the New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code, and a “clearing agency” registered under the provisions of Section 17A of the Securities Exchange Act. DTC also facilitates the post-trade settlement among its direct participants of sales and other securities transactions in deposited securities, through electronic computerized book-entry transfers and pledges between its direct participants’ accounts. This eliminates the need for physical movement of securities certificates. DTC’s direct participants include both U.S. and non-U.S. securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. DTC is a wholly-owned subsidiary of The Depository Trust & Clearing Corporation which, in turn, is owned by a number of DTC’s direct participants and members of the National Securities Clearing Corporation, Fixed Income Clearing Corporation and Emerging Markets Clearing Corporation, as well as by the New York Stock Exchange, Inc., the American Stock Exchange LLC, and the Financial Industry Regulatory Authority. Access to the DTC system is also available to others such as U.S. and non-U.S. securities brokers and dealers, banks, trust companies and clearing corporations that clear through or maintain a custodial relationship with a DTC participant, either directly or indirectly. The DTC rules applicable to its participants are on file with the SEC.

Purchases of securities under DTC’s system must be made by or through a direct participant, which will receive a credit for such securities on DTC’s records. The ownership interest of each actual purchaser of each security, the beneficial owner, is in turn recorded on the records of direct and indirect participants. Beneficial owners will not receive written confirmation from DTC of their purchases, but they should receive written confirmations providing details of the transactions, as well as periodic statements of their holdings, from the participants through which they entered into the transactions. Transfers of ownership interest in the securities are accomplished by entries made on the books of participants acting on behalf of beneficial owners. Beneficial owners will not receive certificates representing their securities, except in the event that use of the book-entry system for the securities is discontinued.

To facilitate subsequent transfers, all global securities that are deposited with, or on behalf of, DTC are registered in the name of DTC’s nominee, Cede & Co. The deposit of global securities with, or on behalf of, DTC and their registration in the name of Cede & Co. effect no change in beneficial ownership. DTC has no knowledge of the actual beneficial owners of the securities; DTC’s records reflect only the identity of the direct participants to whose accounts such securities are credited, which may or may not be the beneficial owners. The participants will remain responsible for keeping account of their holdings on behalf of their customers.

Conveyance of notices and other communications by DTC to direct participants, by direct participants to indirect participants and by direct and indirect participants to beneficial owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time.

Neither DTC nor Cede & Co. will consent or vote with respect to the global securities. Under its usual procedures, DTC will mail an omnibus proxy to NiSource Finance as soon as possible after the applicable record date. The omnibus proxy assigns Cede & Co.’s consenting or voting rights to those direct participants to whose accounts the securities are credited on the applicable record date (identified in a listing attached to the omnibus proxy).

Redemption proceeds, principal payments and any premium, interest or other payments on the global securities will be made to Cede & Co., as nominee of DTC. DTC’s practice is to credit direct participants’

accounts on the applicable payment date in accordance with their respective holdings shown on DTC’s records, unless DTC has reason to believe that it will not receive payment on that date. Payments by participants to beneficial owners will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers in bearer form or registered in “street name,” and will be the responsibility of the participant and not of DTC, NiSource Finance, NiSource or the indenture trustee, subject to any statutory or regulatory requirements in effect at the time. Payment of redemption payments, principal and any premium, interest or other payments to DTC is the responsibility of NiSource Finance and the applicable paying agent, disbursement of payments to direct participants will be the responsibility of DTC, and disbursement of payments to the beneficial owners will be the responsibility of direct and indirect participants.

If applicable, redemption notices will be sent to Cede & Co. If less than all of the debt securities of like tenor and terms are being redeemed, DTC’s practice is to determine by lot the amount of the interest of each direct participant in such issue to be redeemed.

A beneficial owner electing to have its interest in a global security repaid by NiSource Finance will give any required notice through its participant and will effect delivery of its interest by causing the direct participant to transfer the participant’s interest in the global securities on DTC’s records to the appropriate party. The requirement for physical delivery in connection with a demand for repayment will be deemed satisfied when the ownership rights in the global securities are transferred on DTC’s records.

DTC may discontinue providing its services as securities depositary with respect to the global securities at any time by giving reasonable notice to NiSource Finance or the indenture trustee. Under such circumstances, in the event that a successor securities depositary is not obtained, certificates for the securities are required to be printed and delivered.

NiSource Finance may decide to discontinue use of the system of book-entry transfers through DTC (or a successor securities depositary). In that event, certificates for the securities will be printed and delivered.

We have provided the foregoing information with respect to DTC to the financial community for information purposes only. We do not intend the information to serve as a representation, warranty or contract modification of any kind. We have received the information in this section concerning DTC and DTC’s system from sources that we believe to be reliable, but we take no responsibility for the accuracy of this information.

Governing Law

The Indenture and the debt securities are governed by the internal laws of the State of New York.

Information Concerning the Indenture Trustee

Prior to default, the indenture trustee will perform only those duties specifically set forth in the Indenture. After default, the indenture trustee will exercise the same degree of care as a prudent individual would exercise in the conduct of his or her own affairs. The indenture trustee is under no obligation to exercise any of the powers vested in it by the Indenture at the request of any holder of debt securities unless the holder offers the indenture trustee reasonable indemnity against the costs, expenses and liability that the indenture trustee might incur in exercising those powers. The indenture trustee is not required to expend or risk its own funds or otherwise incur personal financial liability in the performance of its duties if it reasonably believes that it may not receive repayment or adequate indemnity. (See Section 601.)

DESCRIPTION OF WARRANTS

NiSource and NiSource Finance may issue warrants to purchase equity or debt securities, respectively. NiSource and NiSource Finance may issue warrants independently or together with any offered securities. The warrants may be attached to or separate from those offered securities. NiSource and NiSource Finance will issue the warrants under warrant agreements to be entered into between NiSource or NiSource Finance, as the case may be, and a bank or trust company, as warrant agent, all as described in the applicable prospectus supplement. The warrant

agent will act solely as agent in connection with the warrants and will not assume any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants.

The prospectus supplement relating to any warrants that we may offer will contain the specific terms of the warrants. These terms may include the following:


	•	the title of the warrants;

	•	the designation, amount and terms of the securities for which the warrants are exercisable;

	•	the designation and terms of the other securities, if any, with which the warrants are to be issued and the number of warrants issued with each other security;

	•	the price or prices at which the warrants will be issued;

	•	the aggregate number of warrants;

	•	any provisions for adjustment of the number or amount of securities receivable upon exercise of the warrants or the exercise price of the warrants;

	•	the price or prices at which the securities purchasable upon exercise of the warrants may be purchased;

	•	if applicable, the date on and after which the warrants and the securities purchasable upon exercise of the warrants will be separately transferable;

	•	if applicable, a discussion of the material U.S. federal income tax considerations applicable to the exercise of the warrants;

	•	any other terms of the warrants, including terms, procedures and limitations relating to the exchange and exercise of the warrants;

	•	the date on which the right to exercise the warrants will commence, and the date on which the right will expire;

	•	the maximum or minimum number of warrants that may be exercised at any time; and

	•	information with respect to book-entry procedures, if any.

Exercise of Warrants

Each warrant will entitle the holder of warrants to purchase for cash the amount of equity or debt securities at the exercise price stated or determinable in the prospectus supplement for the warrants. Warrants may be exercised at any time up to the close of business on the expiration date shown in the applicable prospectus supplement, unless otherwise specified in such prospectus supplement. After the close of business on the expiration date, unexercised warrants will become void. Warrants may be exercised as described in the applicable prospectus supplement. When the warrant holder makes the payment and properly completes and signs the warrant certificate at the corporate trust office of the warrant agent or any other office indicated in the prospectus supplement, NiSource or NiSource Finance, as the case may be, will, as soon as possible, forward the equity or debt securities that the warrant holder has purchased. If the warrant holder exercises the warrant for less than all of the warrants represented by the warrant certificate, NiSource or NiSource Finance, as the case may be, will issue a new warrant certificate for the remaining warrants.

DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS

NiSource may issue stock purchase contracts, including contracts obligating holders to purchase from NiSource, and for NiSource to sell to the holders, a specified number of shares of common stock at a future date or dates. The price per share of common stock and the number of shares of common stock may be fixed at the time the stock purchase contracts are issued or may be determined by reference to a specific formula stated in the stock purchase contracts.

The stock purchase contracts may be issued separately or as part of units that we call “stock purchase units.” Stock purchase units consist of a stock purchase contract and either NiSource Finance’s debt securities or U.S. treasury securities securing the holders’ obligations to purchase the common stock under the stock purchase contracts.

The stock purchase contracts may require us to make periodic payments to the holders of the stock purchase units or vice versa, and these payments may be unsecured or prefunded on some basis. The stock purchase contracts may require holders to secure their obligations in a specified manner.

The applicable prospectus supplement will describe the terms of the stock purchase contracts or stock purchase units. The description in the prospectus supplement will only be a summary, and you should read the stock purchase contracts, and, if applicable, collateral or depositary arrangements, relating to the stock purchase contracts or stock purchase units. Material U.S. federal income tax considerations applicable to the stock purchase units and the stock purchase contracts will also be discussed in the applicable prospectus supplement.

PLAN OF DISTRIBUTION

We may sell the securities to or through underwriters, through dealers or agents, directly to you or through a combination of these methods. The prospectus supplement with respect to any offering of securities will describe the specific terms of the securities being offered, including:


	•	the name or names of any underwriters, dealers or agents;

	•	the purchase price of the securities and the proceeds to NiSource or NiSource Finance from the sale;

	•	any underwriting discounts and commissions or agency fees and other items constituting underwriters’ or agents’ compensation;

	•	any initial public offering price;

	•	any discounts or concessions allowed or reallowed or paid to dealers; and

	•	any securities exchange on which the offered securities may be listed.

Through Underwriters. If we use underwriters in the sale of the securities, the underwriters will acquire the offered securities for their own account. We will execute an underwriting agreement with an underwriter or underwriters once an agreement for sale of the securities is reached. The underwriters may resell the offered securities in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. The underwriters may sell the offered securities directly or through underwriting syndicates represented by managing underwriters. Unless otherwise stated in the prospectus supplement relating to offered securities, the obligations of the underwriters to purchase those offered securities will be subject to certain conditions, and the underwriters will be obligated to purchase all of those offered securities if they purchase any of them.

Through Dealers. If we use a dealer to sell the securities, we will sell the offered securities to the dealer as principal. The dealer may then resell those offered securities at varying prices determined at the time of resale. Any initial public offering price and any discounts or concessions allowed or reallowed or paid to dealers may be changed from time to time.

Through Agents. If we use agents in the sale of securities, we may designate one or more agents to sell offered securities. Unless otherwise stated in a prospectus supplement, the agents will agree to use their best efforts to solicit purchases for the period of their appointment.

Directly to Purchasers. We may sell the offered securities directly to one or more purchasers. In this case, no underwriters, dealers or agents would be involved. We will describe the terms of our direct sales in our prospectus supplement.

General Information. A prospectus supplement will state the name of any underwriter, dealer or agent and the amount of any compensation, underwriting discounts or concessions paid, allowed or reallowed to them. A

prospectus supplement will also state the proceeds to us from the sale of offered securities, any initial public offering price and other terms of the offering of those offered securities.

Our agents, underwriters and dealers, or their affiliates, may be customers of, engage in transactions with or perform services for us in the ordinary course of business.

We may authorize agents, underwriters or dealers to solicit offers by certain institutions to purchase offered securities from us at the public offering price and on terms described in the related prospectus supplement pursuant to delayed delivery contracts providing for payment and delivery on a specified date in the future. If we use delayed delivery contracts, we will disclose that we are using them in our prospectus supplement and will tell you when we will demand payment and delivery of the securities. The delayed delivery contracts will be subject only to the conditions we set forth in our prospectus supplement.

We may enter into agreements to indemnify agents, underwriters and dealers against certain civil liabilities, including liabilities under the Securities Act of 1933.

LEGAL OPINIONS

Schiff Hardin LLP, Chicago, Illinois, will pass upon the validity of the securities offered by this prospectus for us. The opinions with respect to the securities may be subject to assumptions regarding future action to be taken by us and the trustee, if applicable, in connection with the issuance and sale of the securities, the specific terms of the securities and other matters that may affect the validity of securities but that cannot be ascertained on the date of those opinions.

EXPERTS

The consolidated financial statements and related financial statement schedules of NiSource Inc. and subsidiaries, incorporated in this prospectus by reference from NiSource Inc.’s Annual Report on Form 10-K, and the effectiveness of NiSource Inc. and subsidiaries’ internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports, which are incorporated herein by reference. Such consolidated financial statements and financial statement schedules have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.