2,000,000 Shares

ATMOS ENERGY CORPORATION

DIRECT STOCK PURCHASE PLAN

Common Stock

We are offering the shares to our shareholders, our customers and other investors under our Direct Stock Purchase Plan. Plan participants may also take advantage of additional services, most without any fees or commissions.

Under our plan, participants may:

The shares trade on the New York Stock Exchange under the symbol “ATO.” On March 25, 2004, the last sale price of the shares as reported on the New York Stock Exchange was $25.25 per share.

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

The date of this prospectus is April 1, 2004.

We have not authorized any other person to provide you with any information or to make any representations not contained in this prospectus. If anyone provides you with different or inconsistent information, you should not rely on it. We are not making an offer of any securities other than the shares. You should assume that the information appearing in this prospectus, as well as the information contained in any document incorporated by reference, is accurate as of the date of such document only.

TABLE OF CONTENTS

The distribution of this prospectus, and the offering of the shares, may be restricted by law in certain jurisdictions. You should inform yourself about, and observe, any of these restrictions. This prospectus does not constitute, and may not be used in connection with, an offer or solicitation by anyone 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 any person to whom it is unlawful to make the offer or solicitation.

WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission under the Securities Exchange Act of 1934. You may read and copy this information at the Public Reference Room of the SEC, 450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549, at prescribed rates. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330.

The SEC also maintains an Internet website that contains reports, proxy statements and other information about issuers, like us, who file electronically with the SEC. The address of that Website is www.sec.gov.

You can also inspect reports, proxy statements and other information about us at the offices of the New York Stock Exchange, Inc., 20 Broad Street, New York, NY 10005.

We have filed with the SEC a registration statement on Form S-3 that registers the shares of common stock we are offering. The registration statement, including the attached exhibits and schedules, contains additional relevant information about us and the shares of common stock being offered. The rules and regulations of the SEC allow us to omit certain information included in the registration statement from this prospectus.

INCORPORATION BY REFERENCE

The SEC allows us to “incorporate by reference” information into this prospectus that we have filed with it. This means that we can disclose important information to you by referring you to another document filed separately with the SEC. The information incorporated by reference is considered to be a part of this prospectus, except for any information that is superseded by information that is included directly in this document. We incorporate by reference the documents listed below and any additional documents we may file with the SEC under sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 prior to the termination of our offering of securities. These additional documents include periodic reports, such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K (other than filings under items 9 or 12), as well as proxy statements.

This prospectus incorporates by reference the documents listed below that we have filed with the SEC but have not included or delivered with this document. These documents contain important information about us and our financial condition.

You may obtain a copy of any of these filings from us without charge by requesting it in writing or by telephone from us at the following address or telephone number:

Atmos Energy Corporation

1800 Three Lincoln Centre

5430 LBJ Freeway

Dallas, Texas 75240

Attention: Shareholder Relations

(972) 934-9227

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

Statements contained in this prospectus that are not statements of historical fact are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933. Forward-looking statements are based on management’s beliefs as well as assumptions made by, and information currently available to, management. Because such statements are based on expectations as to future economic performance and are not statements of fact, actual results may differ materially from those stated. Important factors that could cause future results to differ include, but are not limited to:

All of these factors are difficult to predict and many are beyond our control. Accordingly, while we believe these forward-looking statements to be reasonable, there can be no assurance that they will approximate actual experience or that the expectations derived from them will be realized. When used in our documents, the words “anticipate,” “believe,” “estimate,” “expect,” “objective,” “projection,” “plan,” “forecast,” “goal,” “seek,” “strategy” or similar words are intended to identify forward-looking statements. We undertake no obligation to update or revise our forward-looking statements, whether as a result of new information, future events or otherwise. For further discussion of these factors, please refer to the Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended September 30, 2003 and our Quarterly Report on Form 10-Q for the three months ended December 31, 2003.

PROSPECTUS SUMMARY

You should read the following summary in conjunction with the more detailed information contained elsewhere in this prospectus and the documents incorporated by reference in this prospectus.

The Plan

We offer our Direct Stock Purchase Plan to provide our shareholders, our customers and other investors with a convenient and economical way to purchase our common stock and accumulate and increase their investment in our common stock by reinvesting all or a portion of their cash dividends in additional shares. We currently do not charge any service fees or brokerage commissions on any purchases of common stock under the plan.

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If you participate in the plan and wish to terminate your participation, you will incur brokerage commissions on the sale of your shares in the plan of $.05 per share, plus any applicable transfer tax and a fee of $15.00 charged by the plan administrator.

The plan administrator will use reinvested dividends, initial investments and optional cash investments it receives from participants to buy shares of our common stock for those participants through the plan at then current market prices, as discussed in more detail below. The plan administrator may buy shares on the market from brokers or may buy shares directly from us.

The Offering

This prospectus relates to 2,000,000 authorized shares of our common stock offered for purchase under the plan by shareholders and other investors through initial investments, the reinvestment of dividends and optional cash investments of at least $25 and not more than $100,000 per calendar year. Non-shareholders must make initial investments of at least $1,250 and not more than $100,000. Shareholders are not required to make initial investments if they own of record at least 50 shares of our common stock. Any shareholder who does not own of record at least 50 shares of our common stock must make an initial investment of at least $1,250 and not more than $100,000 to participate in the plan.

All shares purchased with initial investments, reinvested dividends or optional cash investments, including automatic monthly investments, are purchased at then current market prices. A participant may make no more than $100,000 of optional cash investments during any calendar year, and a non-participant may not make an initial investment of more than $100,000. However, after an initial investment is made, a participant is allowed to make optional cash investments up to $100,000, including the initial investment, during that and each subsequent calendar year.

The terms “we,” “our” and “us” refer to Atmos Energy Corporation unless the context suggests otherwise. The term “you” refers to an existing plan participant or a prospective plan participant.

ATMOS ENERGY CORPORATION

We and our subsidiaries are engaged primarily in the natural gas utility business, as well as certain non-utility businesses. We distribute natural gas through sales and transportation arrangements to approximately 1.7 million residential, commercial, public authority and industrial customers through our six regulated utility divisions, which cover service areas located in the following 12 states: Colorado, Georgia, Illinois, Iowa, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, Texas and Virginia. In addition, we transport natural gas for others through our distribution system.

Through our non-utility businesses, we provide natural gas management and marketing services to industrial customers, municipalities and other local gas distribution companies in 18 states. We also supplement natural gas used by our customers through natural gas storage fields that we own or hold an interest in and which are located in Kansas, Kentucky, Louisiana and Mississippi. We market natural gas to industrial and agricultural customers primarily in west Texas and to industrial customers in Louisiana. We also construct electric power generating plants and associated facilities to meet peak load demands and lease or sell them to municipalities and industrial customers.

Our operations are divided into three segments:

Our principal executive offices are at 1800 Three Lincoln Centre, 5430 LBJ Freeway, Dallas, Texas 75240, our telephone number is (972) 934-9227, and our Internet website address is www.atmosenergy.com. Information on our Internet website is not part of this prospectus.

USE OF PROCEEDS

We do not know the number of shares that we will sell to the plan administrator under the plan nor the prices at which the shares will be sold. We will use the net proceeds we receive pursuant to this offering for general corporate purposes.

PLAN OF DISTRIBUTION

The shares are being offered pursuant to our Direct Stock Purchase Plan described in this prospectus. The plan administrator will purchase the shares being offered directly from us or on the open market, at our discretion. In accordance with current rulings by the Securities and Exchange Commission, we will not change our determination regarding the source of shares being purchased by the plan administrator under the plan more than once in any three-month period. Any change in the source of the shares being purchased will be made by a determination of our board of directors, a determination by our chief financial officer that we need additional capital, or a determination by us that there is another valid reason for a change. We generally pay all fees, commissions and expenses incurred in connection with the plan, including any annual administrative fee. However, a participant is responsible for all commissions and fees relating to the sale of all or a portion of the shares in his or her plan account.

DESCRIPTION OF THE PLAN

The following is a question and answer description of our Direct Stock Purchase Plan:

Purpose and Advantages

1.    What is the purpose of the plan?

The purpose of the plan is to provide to our shareholders, our customers and other investors a simple, convenient and economical way to accumulate and increase their investment in our common stock by reinvesting all or a portion of their cash dividends paid quarterly in additional shares of our common stock. However, shareholders using the plan for arbitrage, or short-term income producing strategies, may have their participation in the plan terminated by the plan administrator.

2.    What are some of the advantages of the plan?

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The plan offers a “safekeeping” service whereby a shareholder of record may deposit his or her stock certificates with the plan administrator and have his or her ownership of such stock maintained on the plan administrator’s records as part of their plan accounts.

Disadvantages of the Plan

3.    What are some of the disadvantages of the plan?

Administration

The plan administrator administers the plan, purchases and holds the shares acquired under the plan, maintains records, and sends statements of account activity to participants. All enrollment applications, optional cash investments, notices of withdrawal and termination and all other matters and communications related to the plan should be addressed to:

Atmos Energy Corporation

c/o American Stock Transfer & Trust Company

Dividend Reinvestment Department

P.O. Box 922

Wall Street Station

New York, NY 10269-0560

Please mention Atmos Energy Corporation in all correspondence and provide your plan account number or social security number.

Participants may also telephone AST toll free at 1-800-543-3038, Monday through Thursday, 8:00 a.m.-7:00 p.m. Eastern Time, and Friday, 8:00 a.m.-5:00 p.m. Eastern Time.

Participants may also complete all transactions online at www.amstock.com.

Participation

Any person or entity, whether or not a holder of record of our common stock, is eligible to participate in the plan if (a) the person or entity fulfills the prerequisites for participation described below under “Enrollment Procedures,” and (b) in the case of citizens or residents of a country other than the United States, its territories and possessions, participation in the plan would not violate local laws applicable to us or the participant. Each participant in the plan will remain enrolled in the plan until he or she instructs the plan administrator in writing to close his or her account.

Participants in our Retirement Savings Plan are not eligible to participate in our Direct Stock Purchase Plan through the retirement plan. However, Retirement Savings Plan participants are eligible to participate in our Direct Stock Purchase Plan with respect to shares of our common stock held outside the Retirement Savings Plan if they meet the requirements for participation in our Direct Stock Purchase Plan.

Enrollment Procedures

7.

What does the enrollment application provide?

The enrollment application provides for the purchase of additional shares of our common stock by a shareholder of record through the following investment options:

Participants may elect to have cash dividends deposited electronically into a bank checking or savings account at no charge by completing a direct dividend deposit authorization agreement available from the plan administrator online or by mail.

A participant may elect to purchase shares through full or partial dividend reinvestment or optional cash investments only, and may change the number of shares subject to dividend reinvestment from time to time by completing and submitting to the plan administrator a new enrollment application.

To be effective with respect to a particular dividend, any change in the reinvestment election must be received by the plan administrator on or before the record date for such dividend. It is not necessary for participants to hold shares in certificated form to receive cash dividends on all of their shares. However, participants who choose to receive cash dividends on only a portion of their shares must hold such shares in certificated form.

After reviewing a copy of this prospectus, non-shareholders of record may join the plan at any time by completing an enrollment application online or by mailing it to the plan administrator along with their initial investment of at least $1,250. After reviewing a copy of this prospectus, eligible shareholders of record who own at least 50 shares may enroll in the plan at any time. Any investment received as an initial investment without a properly completed enrollment application will be returned and no action will be taken. If an enrollment application requesting reinvestment of dividends is received by the plan administrator on or before the record date for a dividend payment, then that dividend payment will be applied toward the purchase of shares of our common stock. Record dates are ordinarily the 25th day of February, May, August and November. However, when the 25th day of those months falls on a national holiday, then the dividend record date is the first business day following that holiday.

If the plan administrator receives an enrollment application requesting reinvestment of dividends after the record date established for a particular dividend, then the reinvestment of dividends will begin on the dividend payment date following the next record date if that shareholder is still a holder of record.

Purchases and Price of Shares

At our discretion, the plan administrator will purchase shares of our common stock either directly from us or on the open market. If the shares are purchased directly from us, they will be either authorized but unissued shares or shares held by us as treasury stock.

10.

When will shares be purchased under the plan?

The plan administrator will purchase shares directly from us on the relevant investment date. Purchases on the open market will begin on the relevant investment date and will be completed no later than 30 days from that date, except where completion at a later date is necessary or advisable under any applicable federal securities laws. These purchases may be made on the New York Stock Exchange or any other securities exchange where our shares of common stock are traded, in the over-the-counter market or by negotiated transactions, and may be subject to terms with respect to price, delivery and other terms as the plan administrator may agree. Neither we nor any participant will have any authority or power to direct the time or price at which shares may be purchased or the selection of the broker or dealer through or from whom purchases are to be made. When shares are purchased on the open market, participants become owners of the shares as of the date of settlement.

There are at least four investment dates each month. The investment dates are the first business day of each week, except for any week which contains a dividend payment date, in which case the dividend payment date will become the investment date. However, if the dividend payment date is on a Friday, the investment date will be the following business day. If an investment date falls on a date on which the New York Stock Exchange is closed, the first succeeding day on which the New York Stock Exchange is open will be the investment date.

The purchase price of shares purchased under the plan will be determined as follows:

12.

How many shares will be purchased for participants?

The number of shares to be purchased depends on the amount of the participant’s dividends, if any, the share price, and any optional cash investments or initial investments received by the plan administrator. Each participant’s account will be credited with the number of shares, including fractions, equal to the total amount invested, divided by the purchase price.

Initial Investments and Optional Cash Investments

Initial investments must be at least $1,250 and not more than $100,000. Initial investments may be made in the form of a check or money order, and must be included with the completed enrollment application form and returned to the plan administrator at the address listed on the form. Initial investments may also be made online.

All new investors and eligible shareholders of record who have submitted an enrollment application to the plan administrator online or by mail are eligible to make optional cash investments at any time. Payments may be made by check or money order or may be deducted electronically on a monthly basis from a financial institution account. All investments must be payable to the plan administrator in U.S. dollars and drawn against a U.S. bank. The plan administrator will not accept third party checks. The plan administrator will apply any optional cash investment or initial investment received from a participant to the purchase of shares of our common stock for the account of the participant on the next investment date, if the shares are purchased from us, or as soon as practicable on or after the next investment date, if the shares are purchased on the open market.

In the event that any check or automatic monthly investment is returned unpaid for any reason, the plan administrator will consider the request for investment of that money null and void and will immediately remove from the participant’s account shares, if any, purchased upon the prior credit of that investment. A reasonable fee, currently $25, will also be assessed against the participant’s account.

The plan administrator will then be entitled to sell those shares to satisfy any uncollected amounts. If the net proceeds of the sale of those shares are insufficient to satisfy the balance of any uncollected amounts, the plan administrator will be entitled to sell additional shares from the participant’s account to satisfy the uncollected balance.

Brokers or nominees may not utilize any feature of the plan. Accordingly, if a beneficial owner of shares wishes to participate in the plan, he or she must become a record holder of at least 50 shares of our common stock by having all or part of his or her shares transferred to his or her name or making an initial investment of at least $1,250.

Initial investments and optional cash investments received by the plan administrator no later than 12:00 Noon on the business day preceding an investment date will be held by the plan administrator and invested beginning on the investment date. No interest will be paid on amounts held by the plan administrator pending investment. After sending an initial investment or optional cash investment, if a participant changes his or her mind and decides he or she does not want to participate in the plan, then, upon a participant’s written request received by the plan administrator at least two business days prior to the applicable investment date, an initial investment or optional cash investment will be returned to the participant. However, no refund will be made until the funds have been actually received by the plan administrator and cleared by the bank or financial institution.

Expenses and Costs

For plan participants, there are no fees or brokerage commissions in connection with purchases of shares. We pay these costs, along with any costs for administration of the plan. However, participants are charged fees and brokerage commissions for selling shares through the plan.

Reports to Participants

After each transaction in a participant’s account, the plan administrator will send to the participant a transaction confirmation showing the details of the transaction. Each participant will also receive a quarterly investment statement showing any amount invested by initial investment, any amounts invested by optional cash investments, any amounts invested using dividends, the purchase price and number of shares purchased and other information resulting from investment activity for the year to date. Each statement also contains a transaction request form that can be used to deposit shares for safekeeping, make optional cash investments or withdraw shares from the plan. At each year-end, the statement will include all information pertaining to a participant’s account for the year and should be retained for federal and state income tax purposes. Each participant will also receive copies of the same communications sent to every other holder of shares, including our Annual Report to Shareholders and our Notice of Annual Meeting and Proxy Statement. In addition, each participant will receive annually Internal Revenue Service information on Form 1099-DIV for reporting dividend income received.

Stock Certificates and Safekeeping

At the time of enrollment in the plan, or at any later time, participants may use the plan’s safekeeping service to deposit with the plan administrator stock registered in the name of the participant. Shares deposited will be transferred into the name of the plan administrator or its nominee and credited to the participant’s account under the plan. After that time, those shares will be treated in the same manner as shares purchased through the plan.

By using the plan’s safekeeping service, participants do not bear the risk associated with loss, theft or destruction of stock certificates. Also, because shares deposited with the plan administrator are treated in the same manner as shares purchased through the plan, they may be transferred or sold through the plan in a convenient and efficient manner. Dividends paid on shares deposited for safekeeping may be reinvested or paid in cash. Participants may elect to receive cash dividends on all or a portion of those shares by completing and submitting to the plan administrator a new enrollment application indicating the number of whole plan shares for which they choose to receive cash dividends. However, participants who wish to receive cash dividends on only a portion of their shares must hold those shares in certificated form and submit to the plan administrator a new enrollment application indicating the number of certificated plan shares for which they choose to receive cash dividends.

The participant bears the risk of replacement costs if any certificates for shares are lost. Therefore, participants who wish to deposit their stock certificates with the plan administrator should consider sending them with a letter of direction to the plan administrator by registered mail, first class mail, or certified mail, return receipt requested, properly insured, to the following address:

American Stock Transfer & Trust Company

Dividend Reinvestment Dept.

P.O. Box 922

Wall Street Station

New York, NY 10269-0560

Certificates sent by overnight delivery service should be addressed to:

American Stock Transfer & Trust Company

Dividend Reinvestment Dept.

59 Maiden Lane, Plaza Level

New York, NY 10038

The stock certificates should not be endorsed.

Shares purchased under the plan will be automatically held in book entry form by the plan administrator in its name or the name of its nominee. The number of shares, including fractional interests, held for each participant will be shown on each investment statement. Participants may obtain a new certificate for all or some of the whole shares of stock held in their plan accounts by contacting the plan administrator. Any remaining shares will continue to be held in book entry form by the plan administrator.

Dividends on shares purchased through the plan, whether they are held by the participant in certificated form or in book entry form by the plan administrator, may be paid in cash to the shareholder by check or electronic deposit or reinvested pursuant to the shareholder’s instruction to the plan administrator contained in a completed enrollment application. A change to partial dividend reinvestment will require that shares be in certificated form on which dividends will be paid in cash rather than reinvested. These changes must be made by completion of a new enrollment application by contacting the plan administrator either online or by telephone at 1-800-543-3038.

Automatic Monthly Investments

Participants may make optional cash investments of not less than $25 per investment nor more than a total of $100,000 during any calendar year by automatic bank deductions from a pre-designated U.S. bank account. If a participant has already established a plan account and wishes to initiate automatic monthly deductions, he or she must complete and sign an appropriate form provided by the plan administrator and return it to the plan administrator together with a voided blank check (for a checking account) or deposit slip (for a savings account) for the account from which funds are to be drawn. This process may also be completed online. Forms will be processed and will become effective as promptly as practicable.

If a non-shareholder wishes to establish a plan account by means of an initial investment, he or she may also initiate automatic monthly investments by completing the appropriate section of the enrollment application. Once an automatic monthly investment is initiated, funds will be drawn from the participant’s designated account on the 25th day of each month.

Participants may change the amount of their automatic monthly investment by completing and submitting to the plan administrator a new form online or by mail. To be effective with respect to a particular investment date, however, the new form must be received by the plan administrator by the 15th day of each month. Participants may terminate their automatic monthly investment by notifying the plan administrator online or by mail.

Transfer of Shares

Yes. If a participant wishes to change the ownership of all or part of his or her shares held under the plan through gift, private sale or otherwise, the participant may effect the transfer by submitting to the plan administrator a properly completed and executed stock power or other form provided by the plan administrator. Transfers of a participant’s shares may be made in whole or fractional share amounts. However, with respect to any transfer that establishes a new plan account, at least 50 shares must be transferred, while the transferor must maintain at least 50 shares in the plan. The transfer of a participant’s shares is processed in the same manner as the transfer of stock certificates, including the requirement of a medallion signature guarantee. Stock powers are available upon request from the plan administrator or online.

If a participant requests, a stock certificate(s) will be issued to the transferee. No fractional shares of stock will be issued in certificate form. Otherwise, shares transferred will continue to be held in book entry form by the plan administrator under the plan. An account will be opened in the name of the transferee if he or she is not already a participant, and the transferee will automatically be enrolled in the plan under the full dividend reinvestment option. All dividends on shares transferred to the transferee’s plan account will be reinvested under the terms of the plan.

The transferee will receive a transaction confirmation showing the number of shares transferred to and held in the transferee’s plan account.

Tax Consequences

The following is a general discussion of certain material federal income tax consequences with respect to participation in the plan and is based on current federal income tax law. Plan participants should consult their own tax advisors to determine particular tax consequences, including state income tax consequences, that may result from participation in the plan and subsequent disposition of shares acquired pursuant to the plan. This summary does not discuss federal or foreign income tax consequences to participants who are not citizens or residents of the United States or who reside outside of the United States.

Reinvested Dividends.    In the case of reinvested dividends whereby the plan administrator acquires shares for a participant’s account directly from us, the participant must include in gross income as a dividend an amount equal to the fair market value of the shares (as of the date of the distribution) purchased with the participant’s reinvested dividends. The participant’s basis in those shares will also equal the fair market value of the purchased shares on the dividend payment date.

Alternatively, when the plan administrator purchases stock for a participant’s account on the open market with reinvested dividends, the participant must include in gross income as a dividend an amount equal to the full amount of the cash dividend used to purchase those shares plus that portion of any brokerage commissions paid by us, which are attributable to the purchase of the participant’s shares. The participant’s basis in plan shares held for his or her account will be equal to their purchase price plus allocable brokerage commissions.

Optional Cash Investments and Initial Investments.    In the case of shares purchased on the open market with optional cash investments or initial investments, participants must include in gross income as a dividend an amount equal to any brokerage commissions paid by us. The participant’s basis in the shares acquired with optional cash investments or initial investments will be the cost of the shares to the plan administrator plus an allocable share of any brokerage commissions paid by us.

Receipt or Disposition of Shares.    A participant will not realize any taxable income when he or she receives certificates for whole shares credited to his or her account under the plan, either upon a request for the certificates or upon withdrawal from or termination of the plan. However, any participant who receives, upon withdrawal from or termination of the plan, a cash payment for the sale of plan shares held in his or her account or for a fractional share then held in his or her account will realize gain or loss measured by the difference between the amount of the cash received and the participant’s basis in such shares or fractional share. This gain or loss will be capital in character if the shares or fractional shares are a capital asset in the hands of the participant.

Tax Information and Backup Withholding.    Participants will receive annual tax information with respect to dividend income received in connection with the plan, as if those amounts had been paid directly to the participants. Participants will continue to be subject to the backup withholding requirements of the federal income tax laws. If these requirements are not satisfied, an amount of dividends payable to a participant may be withheld equal to the then current Internal Revenue Service withholding rates, which will be paid to the Internal Revenue Service and will not be reinvested under the plan.

Additional Information.    A participant’s holding period for shares acquired pursuant to the plan will begin on the day following the investment date. For individual participants, dividends will be eligible for the special income tax rate of 15%. In the case of corporate shareholders, dividends may be eligible for the dividends-received deduction. The Tax Equity and Fiscal Responsibility Act of 1982 imposes certain reporting obligations upon brokers and other middlemen. As a result, the plan administrator may be required to report to the Internal Revenue Service and the participant any sale of shares effected on behalf of a participant. For further information as to tax consequences of participation in the plan, participants should consult with their own tax advisors.

Termination of Participation

A participant may terminate participation in the plan any time by notice online or by mail to the plan administrator received prior to a dividend record date. Within 10 business days following receipt of notice of termination, the plan administrator will send the participant a certificate for the whole shares in the participant’s plan account. If the participant so requests, the plan administrator will sell all or a portion of the participant’s shares and remit to the participant the proceeds of the sale, less brokerage commissions of $.05 per share, any transfer tax and a fee of $15 charged by the plan administrator. If the request to terminate is received by the plan administrator on or after the record date for a dividend payment, the request to terminate may not become effective until any dividend paid on the dividend payment date has been reinvested and the shares of stock purchased are credited to the participant’s account under the plan. The plan administrator, in its sole discretion, may either pay any dividend in cash or reinvest it in stock on behalf of the terminating participant. If the dividend is reinvested, the plan administrator will sell the shares purchased and remit the proceeds to the participant, less commissions and fees, as described above.

Any cash payment which had been sent to the plan administrator prior to the request to terminate will also be invested unless return of the amount is expressly requested in the request for termination and the request is received at least two business days prior to the relevant investment date. In every case of termination, the participant’s interest in a fractional share will be paid in cash based on the actual market price of stock sold on the New York Stock Exchange, less commissions and fees, as described above. The plan administrator, at its discretion, may terminate any account which contains only a fraction of a share by paying the account holder the dollar value of the fractional share, less commissions and fees, as described above. In addition, the plan administrator, at its discretion, may terminate the account of any participant who is determined to be using the plan in an abusive manner that is not consistent with the purpose of the plan.

After termination, dividends on shares held in certificated form will be paid to the shareholder in cash or deposited electronically into the shareholder’s bank account, if requested, unless and until the shareholder rejoins the plan.

A participant may request that the plan administrator sell some, but not all, of the shares in a plan account, and remit the proceeds, less commissions and fees, as described above, to the participant as soon as possible. If the request to sell is received by the plan administrator after the record date for a dividend payment, any dividends paid on those shares will be reinvested and the shares of stock purchased will be credited to the participant’s plan account.  

Miscellaneous

When participants sell or transfer all of the shares in the plan registered in their names, the plan administrator will continue to purchase shares of stock with the dividends on the shares credited to their accounts under the plan until otherwise notified.

In the case of a rights offering, plan participants will receive rights based upon whole shares of stock registered in their names as of the record date for any rights offered, and whole shares credited to their accounts under the plan as of the record date. In addition, the plan administrator may curtail or suspend the processing of transactions until the completion of the rights offering.

All stock dividends or split shares of common stock distributed by us will be added to the participant’s account. A participant may withdraw any number of whole shares held in his or her account by completing a transaction request form and delivering it to the plan agent online or by mail. If a stock split occurs, it is the responsibility of the participant to notify the plan agent of any changes to his or her partial dividend reinvestment election to be reallocated to adjust for his or her cash dividends to be paid on a “post-split” basis. In addition, the plan administrator may curtail or suspend the processing of transactions until we complete all steps effecting stock dividends or stock splits.

Full and fractional shares held in the plan for a participant will be voted as the shareholder directs. A participant will receive a proxy card showing the total number of shares he or she holds, both those registered in the participant’s name and those the participant holds under the plan.

30.

May the plan be amended or discontinued?

We reserve the right to suspend, amend or terminate the plan at any time. All shareholders of record, both participants and non-participants in the plan, will be notified of any suspension, termination or significant amendment of the plan. If the plan is terminated, shares held in the participant’s account will be distributed to the participants. Any change in the source of purchase of shares under the plan from open market purchases or direct issuance by us does not constitute an amendment to the plan.

We reserve the right to interpret and regulate the plan, as deemed desirable or necessary, in connection with its operation. Additionally, we and the plan administrator each reserve the right to terminate enrollment of any participant who participates in the plan in a manner abusive of the purpose and intent of the plan as determined by us or the plan administrator or in a manner deemed by us or the plan administrator not to be in the best interest of shareholders generally. For example, shareholders who are discovered to be using the plan for arbitrage or short-term income producing strategies may have their participation in the plan terminated by us or the plan administrator.

Neither we nor the plan administrator will be liable for any good faith act or for any good faith omission to act, including, without limitation, any claim or liability arising out of failure to terminate a participant’s account upon the participant’s death, the prices at which shares of stock are purchased or sold for a participant’s account, the times when purchases or sales are made, or fluctuations in the market value of stock. However, nothing contained in this provision affects a shareholder’s right to bring a cause of action based on alleged violations of the federal securities laws.

The risk to participants is the same as with any other investment in our common stock. A participant may lose an advantage otherwise available from being able to select more specifically the timing of an investment in or a sale of our shares. Participants must recognize that neither we nor the plan administrator can assure a profit or protect against a loss on the shares purchased under the plan.

DESCRIPTION OF COMMON STOCK

Our authorized capital stock consists of 100,000,000 shares of common stock, of which 52,230,629 shares were outstanding on March 25, 2004. Each of our shares of common stock is entitled to one vote on all matters voted upon by shareholders. Our shareholders do not have cumulative voting rights. Our issued and outstanding shares of common stock are fully paid and nonassessable. There are no redemption or sinking fund provisions applicable to the shares of our common stock, and such shares are not entitled to any preemptive rights. Since we are incorporated in both Texas and Virginia, we must comply with the laws of both states when issuing shares of our common stock.

Holders of our shares of common stock are entitled to receive such dividends as may be declared from time to time by our board of directors from our assets legally available for the payment of dividends and, upon our liquidation, a pro rata share of all of our assets available for distribution to our shareholders.

Under the provisions of some of our debt agreements, we have agreed to restrictions on the payment of cash dividends. Under these restrictions, our cumulative cash dividends paid after December 31, 1988 may not exceed the sum of our and our subsidiaries’ accumulated consolidated net income for periods after December 31, 1988, plus approximately $15.0 million. As of December 31, 2003, approximately $97.9 million was available for the declaration of dividends under these restrictions.

The registrar and transfer agent for our common stock is American Stock Transfer & Trust Company.

Registration Rights and Other Agreements

As part of the consideration for our Mississippi Valley Gas Company acquisition in December 2002, we issued 3,386,287 shares of common stock under an exemption from registration under the Securities Act. In the transaction, we entered into a registration rights agreement with the former stockholders of Mississippi Valley Gas Company that requires us, on no more than two occasions, and with some limitations, to file a registration statement under the Securities Act within 60 days of their request for an offering designed to achieve a wide distribution of shares through underwriters selected by us. We also granted rights, subject to some limitations, to participate in future registered offerings of our securities to these shareholders. This participation right does not include offerings covered by the registration statement of which this prospectus is a part. Each of these shareholders has also agreed, for up to five years from the closing of the acquisition, and with some exceptions, not to sell or transfer shares representing more than 1% of our total outstanding voting securities to any person or group or any shares to a person or group who would hold more than 9.9% of our total outstanding voting securities after the sale or transfer. This restriction, and other agreed restrictions on the ability of these shareholders to acquire additional shares, participate in proxy solicitations or act to seek control, may be deemed to have an “anti-takeover” effect.

In addition, in connection with our funding of the Atmos Energy Corporation Pension Account Plan, we issued to the Atmos Energy Corporation Master Retirement Trust, for the benefit of the Pension Account Plan, 1,169,700 shares of common stock under an exemption from registration under the Securities Act. In the transaction, we entered into a registration rights agreement with the asset manager of the Pension Account Plan that requires us, on no more than three occasions, and with some limitations, to file a registration statement under the Securities Act within 60 days of its request for an offering designed to achieve a wide distribution of shares through underwriters selected by us. We also granted rights, subject to some limitations, to participate in future registered offerings of our securities to the asset manager. This participation right does not include offerings covered by the registration statement of which this prospectus is a part.

Charter and Bylaw Provisions

Some provisions of our restated articles of incorporation and bylaws may be deemed to have an “anti-takeover” effect. The following description of these provisions is only a summary, and we refer you to our restated articles of incorporation and bylaws for more information since their terms affect your rights as a shareholder.

Classification of the Board.    Our board of directors is divided into three classes, each of which consists, as nearly as may be possible, of one-third of the total number of directors constituting the entire board. There are currently 12 directors serving on the board. Each class of directors serves a three-year term. At each annual meeting of our shareholders, successors to the class of directors whose term expires at the annual meeting are elected for three-year terms. Our restated articles of incorporation prohibit cumulative voting. In general, in the absence of cumulative voting, one or more persons who hold a majority of our outstanding shares can elect all of the directors who are subject to election at any meeting of shareholders.

The classification of directors could have the effect of making it more difficult for shareholders, including those holding a majority of the outstanding shares, to force an immediate change in the composition of our board. Two shareholder meetings, instead of one, generally will be required to effect a change in the control of our board. Our board believes that the longer time required to el