Search NYSE MRO $0.00 0.00 Operations Investors Owner Relations Careers Sustainability About SHAREHOLDER SERVICES A ONE-STOP SHOP Resources for Shareholders Marathon Oil's common stock is traded on the New York Stock Exchange under the common stock symbol MRO. Below you'll find information on account access, registration, and how you can protect your shares and take advantage of solutions to simplify record keeping. You can also review important historical cost basis information relating to Marathon Oil shares. GET STARTED SECTION 1 Online Account Access For your convenience, you may access your stock account online at Computershare's Investor Centre™. Access will require a User ID number and Password. New members may set up their account access using the Create Login tab at the middle-left of the Computershare Investor Centre™ login page. Should you need additional assistance, please contact Computershare toll-free at 1-888-843-5542. Log In SECTION 2 Changes in Registration of a Stock Certificate Contacting the Registrar Computershare is the transfer agent and registrar for Marathon Oil Corporation registered shareholders. Computershare may be contacted as follows: Computershare P.O. Box 30170 College Station, TX77842-3170 web.queries@computershare.com By overnight delivery: 211 Quality Circle, Suite 210 College Station, TX77845 InvestorCentre™ Manage your account at computershare.com/investor Submit an Online Inquiry Telephone Contacts U.S., Canada, Puerto Rico 888-843-5542 Outside of the U.S. 781-575-4735 Common Transfer & Registration Issues Dividend Payments Receipt of IRS Form 1099-DIV Dividend Checks Not Received/Electronic Deposit Direct Stock Purchase and Dividend Reinvestment Plan Shareholder Publications Address Change Taxpayer Identification Number Exchange of Certificate Lost Stock Certificate Independent Registered Public Accounting Firm SECTION 3 Escheatment Information Did you know you must take action to keep your shares of common stock of Marathon Oil (MRO) ‘active’ with your bank, broker or our transfer agent to avoid them being turned over as unclaimed property? Read this FAQ to find out more about the escheatment process, and how to prevent this from happening to your investment. What causes escheatment? What property is subject to the escheatment laws? What is the timeframe for escheatment? Do I receive any kind of notice prior to escheatment? If my shares have been escheated to the state and I seek to reclaim my property... How do I avoid escheatment of my MRO common stock? Is there a resource to learn more about escheatment and unclaimed property? SECTION 4 Direct Registration Keeping it simple with direct registration Direct Registration is an option you can consider to simplify record-keeping and automate your holdings. It's a service that allows shares to be owned, reported and transferred electronically without holding a physical stock certificate representing your Marathon Oil common shares. By choosing Direct Registration, your shares would be held in your name and recorded electronically on Marathon Oil’s books and records via its transfer agent, Computershare. Safety Holding your shares via Direct Registration relieves you from the worry and responsibility of monitoring your valuable stock certificate(s). It also saves you time and money when getting them replaced if you can't find the physical certificates. Under Direct Registration ownership, you maintain your traditional voting and other rights and benefits as a stockholder. Capabilities Below are examples of some of the things you can do with direct registration for record keeping and automation: For safekeeping, you can convert your existing physical stock certificate(s) to book-entry stock ownership. You can sell all or some of your book-entry shares simply by calling Computershare, our transfer agent, at 1-888-843-5542 between 7:00 a.m. and 7:00 p.m. Eastern Standard Time, Monday through Friday. You can receive your dividends in cash or choose to reinvest all or part of them to purchase additional shares through Marathon Oil's Dividend Reinvestment Plan (detailed below). You can transfer your book-entry shares without having to surrender a physical stock certificate. You can electronically transfer all or some of your shares held by your broker to Direct Registration by contacting your broker. You can electronically transfer all or some of your book-entry shares to your broker at no cost to you by calling our transfer agent. Additional Questions? Visit the Shareholder F.A.Q. page. The answer may just be waiting for you there. Shareholder FAQ DIVIDEND REINVESTMENT PLAN SECTION 5 Direct stock purchase and dividend reinvestment plan Computershare Investment Plan Marathon Oil's transfer agent, Computershare, sponsors and administers the Computershare Investment Plan for Marathon Oil Corporation common stock. This plan offers direct stock purchase and dividend reinvestment alternatives and is available to current Marathon Oil shareholders, as well as, new investors. For more information you may contact Computershare, the plan administrator: By regular mail: Computershare Investor Services P. O. Box 30170 College Station, TX 77842 By overnight delivery: Computershare Investor Services 211 Quality Circle, Suite 210 College Station, TX77845 Online InvestorCentre™ Enroll Online Enrollment and account management is available via the Computershare website. Telephone Contacts U.S., Canada, Puerto Rico 888-843-5542 Outside of the U.S. 781-575-4735 SECTION 6 Cost Basis Calculator Facilitating capital gains reporting It can be difficult and time-consuming to calculate the cost basis of your Marathon Oil common stock to report capital gains taxes to the IRS. To help you calculate your cost basis, we provide a hyperlink from our website to NetBasis Cost Basis system. For a fee, NetBasis will automatically calculate the cost basis for your Marathon Oil stock, by adjusting for any corporate actions or dividend reinvestments, if applicable. To use NetBasis, you'll need your purchase/acquisition/sales dates and the number of shares or dollar amount acquired and/or sold on those dates. If you have any questions about using NetBasis, call its 24/7 Customer Care Call Center at 1-888-552-2747 or use the Live Web Chat service located on the HELP button once you've logged on to the system. Once you click on the NetBasis links in this section, you will leave our website and be redirected to the NetBasis system, which has historical information related to the cost basis of Marathon Oil common stock. We receive no compensation from NetBasis or Networth Services, Inc., the owners of NetBasis. Marathon Oil won't have liability for any information received from the NetBasis system. NetBasis Calculate your cost basis quickly and easily with this third-party tool. Visit NetBasis SECTION 7 Historical Cost Basis Information Marathon Petroleum Corporation Spin-Off Marathon Petroleum Spin-Off Cost Basis Information SECTION 8 Western Oil Sands Shareholder Information On October 18, 2007, Marathon Oil completed its acquisition of Western Oil Sands, Inc. Below is a series of frequently asked questions and answers about the mechanics of the transaction for the benefit of former shareholders of Western. General Information What did Western shareholders receive in the transaction? What about the specific consideration I received for my Western shares in the transaction? What are the tax consequences of the transaction for former Western shareholders? I recently received a tax notice regarding Section 338. What does it mean? How can I exchange exchangeable shares from this transaction for common shares of $MRO? Will I receive dividends on my exchangeable shares? 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