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*** Exercise Your Right to Vote *** Important Notice Regarding the Availability of Proxy Materials for the Meeting of Stockholders to Be Held on May 1, 2020. MOBILE MINI, INC. Meeting Information Meeting Type: Annual Meeting For holders as of: March 3, 2020 Date: May 1, 2020 Time: 11:00 AM Local Time Location: Mobile Mini, Inc. Mobile Mini Headquarters 4646 E. Van Buren Street Phoenix, Arizona 85008 mobile mini®, inc. MOBILE MINI, INC. 4646 E. VAN BUREN STREET SUITE 400 PHOENIX, AZ 85008 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 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. E90590-P34159




Before You Vote How to Access the Proxy Materials Proxy Materials Available to VIEW or RECEIVE: NOTICE AND PROXY STATEMENT 2019 ANNUAL REPORT TO SHAREHOLDERS How to View Online: Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX XXXX (located on the following page) and visit: How to Request and Receive a PAPER or E-MAIL Copy: If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request: 1) BY INTERNET: 2) BY TELEPHONE: 1-800-579-1639 3) BY E-MAIL*: * If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow XXXX XXXX XXXX XXXX (located on the following page) in the subject line. 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 April 17, 2020 to facilitate timely delivery. How To Vote Please Choose One of the Following Voting Methods 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 Have the information that is printed in the boxmarked by the arrow 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. E90591-P34159




Voting Items The Board of Directors recommends you vote FOR all of the following nominees: 1. Election of Directors Nominees: 1a. Erik Olsson 1b. Michael L. Watts 1c. Kelly Williams 1d. Sara R. Dial 1e. Jeffrey S. Goble 1f. James J. Martell 1g. Stephen A McConnell 1h. Frederick G. McNamee, III 1i. Kimberly J. McWaters 1j. Michael W. Upchurch The Board of Directors recommends you vote FOR proposals 2 and 3. 2. Ratify the selection of KPMG LLP as the Company's Independent Registered Public Accounting Firm for the year ending December 31, 2020. 3. Advisory vote to approve named executive officer compensation. NOTE: When properly executed, this proxy will be voted as directed. If no direction is given, the proxies will vote for each of the listed nominees in proposal 1 and for proposals 2 and 3. If any other matters properly come before the meeting, the proxies will vote as the Board may recommend. E90592-P34159