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What is Direct Registration System (DRS)?
Direct Registration System (DRS) is a method of recording shares of stock in book-entry form. Book-entry means the company's transfer agent, American Stock Transfer & Trust Company, maintains your shares on your behalf without the need for physical share certificates. Shares held in un-certificated book-entry form have the same rights and privileges as shares held in certificate form.

What are the benefits of DRS?
Holding shares in book-entry form through DRS has the following benefits

• The convenience and security of book-entry shares
• Reduces the risks, time and costs associated with storing paper share certificates and replacing lost or stolen certificates
• Enables electronic share transactions between your broker/dealer and the company's transfer agent
• Reduces the overall administrative costs to the company and its shareholders.

Can I send other CACI International Inc share certificates for safekeeping in my DRS account?
You may choose to deposit other CACI International Inc share certificates into book-entry form for safekeeping at any time. Simply return your certificates and a Letter of Instruction to the company's transfer agent either by registered or certified mail, return receipt requested and insured. It is not necessary to endorse your certificates.

Since the method of delivery of all documents and certificates is at your risk, it is strongly recommended that you insure your package for two percent (2%) of the current market value of the shares, which is the cost of a bond to have your certificates replaced if they are lost or stolen. A DRS Transaction Advice will be mailed to you upon receipt and processing of your certificates by American Stock Transfer & Trust Company.

Can I get a share certificate for my book-entry shares?
You may request a share certificate for all or a portion of your CACI International Inc DRS book-entry shares at any time. To request a certificate you should contact the company's transfer agent as detailed below, and a certificate for your full shares will be mailed to you by the Transfer Agent.

How do I transfer my shares to or from my brokerage account or sell my shares?
In order to sell shares held in your DRS account you will need to have a brokerage account, which you may open (if you don't already have one) at the broker of your choosing. If you wish to transfer your shares to your brokerage account, whether or not you plan to sell your shares, contact your broker and provide him or her with your DRS account information (which appears on the DSR Transaction Advice you will receive from the company's transfer agent when you become a participant in DRS). Your broker will then electronically initiate the transfer of your book-entry shares based on your instructions.

How do I transfer shares held through DRS to a new owner?
You may transfer shares to a new owner by contacting the company's transfer agent. Your instruction must include a Medallion Signature Guarantee. More detailed instructions on transfer requirements are available at www.amstock.com/shareholder/sh_transfinst.asp.

What documents will I receive showing my shares held through DRS?
You will receive a DRS Transaction Advice Form from the company's transfer agent following each transaction involving your shares held through DRS.

What will it cost me to hold my shares through DRS?
You will not be charged for holding your shares of stock through DRS. You should contact your brokerage firm to determine its fees, if any, if you transfer your shares to or sell your shares through your brokerage account.

How do I know my book-entry shares are safe and cannot be transferred without my consent?
Your written consent with a Medallion Signature Guarantee is required by American Stock Transfer & Trust Company to transfer shares to any third-party other than your broker. If you choose to supply a broker with your DRS account information your broker is responsible for obtaining instructions and documentation for any transfer or sale.

What is a Medallion Signature Guarantee and how do I obtain one?
A Medallion Signature Guarantee is a statement (stamp and signature) given by a financial institution such as a commercial bank, credit union, brokerage firm, etc., that is a member of the Securities Transfer Association Medallion Program (STAMP), New York Stock Exchange Program or Stock Exchange Medallion Program (SEMP, MSP). The Medallion Program is not a notarization. To obtain a Medallion Signature Guarantee please visit a financial institution that participates in the Medallion Program.

How do I contact the company's transfer agent?
The company's transfer agent may be reached at

American Stock Transfer & Trust Company
Shareholder Services
6201 15th Avenue
Brooklyn, NY 11219

800-937-5449 (Toll-free)
718-921-8124 (World-wide)