Shareholder Services

Marathon Oil Corporation's stock is traded on the New York Stock Exchange (principal exchange) and the Chicago Stock Exchange under the common stock symbol MRO.

Shareholder Services

(For information or assistance concerning a change in registration of a stock certificate)
National City Bank, Now a part of PNC.
Corporate Trust Department
Shareholder Services Representative
P.O. Box 92301
Cleveland, OH 44101-4301
Toll-free (U.S. only): 888-843-5542
Phone: +1 216-257-8663
Fax: +1 216-257-8508
Email: shareholder.inquiries@nationalcity.com

Frequently Asked Questions Regarding Stock Split

More information regarding Marathon's announcement of a 2-for-1 Stock Split

Shareholder Online Account Access

For your convenience, you may access your stock account online at National City Shareholder Services. Access will require an ID number and PIN. New members may set up their account access using the First Time Visitor tab at the top left of the NCS Web site. Should you need additional assistance, please contact National City Bank toll-free at 1-888-843-5542.

Independent Accountant

PricewaterhouseCoopers LLP
1201 Louisiana, Suite 2900
Houston, TX  77002-5678

Dividend Payments

Dividends on common stock, as declared by the Board of Directors, are normally paid on the 10th day of March, June, September and December.

Receipt of IRS Form 1099-DIV

Form 1099-DIV will be mailed to shareholders by National City Bank no later than January 31, if you were paid at least $10.00 in dividends.

Dividend Checks Not Received/Electronic Deposit

If you do not receive your dividend check on the appropriate payment date, we suggest that you wait at least 10 days after the payment date to allow for any delay in mail delivery. After that time, advise National City Bank by phone or in writing to issue a replacement check. You may contact National City Bank to authorize electronic deposit of your dividends or interest into your bank account.

Dividend Reinvestment and Direct Stock Purchase Plan

The Dividend Reinvestment and Direct Stock Purchase Plan (the "Plan") provides shareholders with a convenient way to purchase additional shares of Marathon Oil Corporation Common Stock without payment of any brokerage fees or service charges through the investment of cash dividends or through optional cash payments. The Plan was temporarily suspended in November 2008. We have reinstituted the Plan, as amended and restated, effective March 10, 2009.

For further information about the Plan, please see the "Letter to Participants." A copy of the Plan Prospectus and Authorization Form can be found on the Dividend Reinvestment and Direct Stock Purchase Plan page. Stockholders of record may also request a copy of the Plan Prospectus and Authorization Form by contacting the Company's stock transfer agent, National City Bank at 1-888-843-5542 or shareholder.inquiries@nationalcity.com. Beneficial holders should contact their brokers.

Shareholder Publications

Comprehensive and consolidated financial statements (SEC Forms 10-K, 10-Q, and 8K) are available online at the SEC's Edgar Database. Click here to request an Annual Report.

Address Change

It is important that you notify National City Bank immediately by phone, in writing, or by fax when you change your address. As a convenience, you also may indicate an address change on the face of your quarterly dividend check. Seasonal addresses also can be entered for your account.

Taxpayer Identification Number

Federal law requires that each stockholder provide a certified Taxpayer Identification Number (TIN) for his/her stockholder account. For individual stockholders, your TIN is your Social Security Number. If you do not provide a certified TIN, National City Bank may be required to withhold 28 percent for federal income taxes from your dividends.

Exchange of Certificate

If you have not done so, we recommend that you return any USX Corporation or United States Steel Corporation common stock certificates, which were issued prior to May 7, 1991, in exchange for certificates for Marathon Oil Corporation common stock. Certificates should be sent to National City Bank.

Lost Stock Certificate

If a stock certificate is lost, stolen, or destroyed, notify National City Bank in writing so that a "stop transfer" can be placed on the missing certificate. National City Bank will send you the necessary forms and instructions for obtaining a replacement certificate. You may be required to obtain and pay for the cost of an indemnity bond. If you find the missing certificate, notify National City Bank in writing immediately so that the stop transfer can be removed. To avoid loss, theft, or destruction, we recommend that you keep your certificates in a safe place, such as a safe deposit box at your bank.