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Preliminary Proxy Statement

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Definitive Proxy Statement

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Soliciting Material under §240.14a-12

SEMILEDS CORPORATION

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*** Exercise Your Right to Vote *** Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to Be Held on March 31, 2017 SEMILEDS CORPORATION You are receiving this communication because you hold shares in the above named company. 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. SEMILEDS CORPORATION 3F NO. 11 KE JUNG ROAD CHU-NAN SITE, HSINCHU SCIENCE PARK CHU-NAN 350 MIAO-LI COUNTY, TAIWAN R.O.C. 0000309331_1 R1.0.1.15 See the reverse side of this notice to obtain proxy materials and voting instructions. Meeting Information Meeting Type: Annual Meeting For holders as of: January 30, 2017 Date: March 31, 2017Time: 9:00 AM LST Location: SemiLEDs Corporation Sin-an Office 3rd floor - No. 8, Xin-an Road Hsinchu Science Park Hsinchu, Taiwan

Before You Vote How to Access the Proxy Materials Proxy Materials Available to VIEW or RECEIVE: Have the information that is printed in the box marked by the arrow (located on the by the arrow (located on the following page) in the subject line. How To Vote Please Choose One of the Following Voting Methods marked by the arrow available and follow the instructions. 0000309331_2 R1.0.1.15 Vote In Person: Many shareholder 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 Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card. 1. Notice & Proxy Statement2. Annual Report How to View Online: following page) and visit: www.proxyvote.com. 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:www.proxyvote.com 2) BY TELEPHONE:1-800-579-1639 3) BY E-MAIL*:sendmaterial@proxyvote.com * If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked 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 March 19, 2017 to facilitate timely delivery.

The Board of Directors recommends you vote FOR the following: 1. Election of Directors Nominees 01 Trung T. Doan 02 Dr. Edward Hsieh 03 Scott R. Simplot 04 Walter Michael Gough The Board of Directors recommends you vote FOR the following proposal: 2. Ratification of the appointment of BF Borgers CPA PC as the independent registered public accounting firm of the Company for the year ending August 31, 2017. NOTE: The proxyholders are authorized to vote on any other business as may properly come before the meeting or any adjournment or postponement thereof. 0000309331_3 R1.0.1.15 Voting items

0000309331_4 R1.0.1.15