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¨ Definitive Proxy Statement
x Definitive Additional Materials
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CROWN CASTLE INTERNATIONAL CORP.
Meeting Type: Annual Meeting
For holders as of: March 28, 2016
Date: May 19, 2016 Time: 9:00 a.m., CDT
Location: Crown Castle Corporate Office
1220 Augusta Drive
1220 AUGUSTA DRIVE
HOUSTON, TX 77057
You are receiving this communication because you hold shares in the company named above.
This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).
We encourage you to access and review all of the important information contained in the proxy materials before voting.
See the reverse side of this notice to obtain proxy materials and voting instructions.
Proxy Materials Available to VIEW or RECEIVE:
NOTICE AND PROXY STATEMENT
How to View Online:
Have the information that is printed in the box marked by the arrow à XXXX XXXX XXXX XXXX (located on the following page) and visit: www.proxyvote .com.
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Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before May 5, 2016 to facilitate timely delivery.
Vote In Person: Many stockholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.
Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow à XXXX XXXX XXXX XXXX (located on the following page) available and follow the instructions.
Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.
The Board of Directors recommends you vote FOR each of the nominees in Proposal 1:
1.Election of Directors
1a. P. Robert Bartolo
1g. Lee W. Hogan
1b. Jay A. Brown
1h. Edward C. Hutcheson, Jr.
1c. Cindy Christy
1i. J. Landis Martin
1d. Ari Q. Fitzgerald
1j. Robert F. McKenzie
1e. Robert F. Garrison II
1k. Anthony J. Melone
1f. Dale N. Hatfield
1l. W. Benjamin Moreland
The ratification of the appointment of PricewaterhouseCoopers LLP as the Company's independent registered public accountants for fiscal year 2016.