[FORM 10-Q x For the quarterly period ended May 31, 2013 or o For the transition period from to SemiLEDs Corporation Delaware 20-2735523 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification Number) 3F, No. 11 Ke Jung Rd., Chu-Nan Site, Hsinchu Science Park, Chu-Nan 350, Miao-Li County, Taiwan, R.O.C. 350 (Zip Code) +886-37-586788 x No o x] [1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER OF THE SARBANES-OXLEY ACT OF 2002 I, Trung Tri Doan, certify that: 1. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,] [CERTIFICATION OF CHIEF FINANCIAL OFFICER OF THE SARBANES-OXLEY ACT OF 2002 I, Timothy Lin, certify that: 1. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading] [CERTIFICATION SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 (1) (2) Dated: July 12, 2013 President and Chief Executive Officer EX-32.1 4 a13-15101_1ex32d1.htm EX-32.1] [CERTIFICATION SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 Interim (1) (2) Dated: July 12, 2013 EX-32.2 5 a13-15101_1ex32d2.htm EX-32.2]

[FORM 10-Q x For the quarterly period ended February 28, 2013 or o For the transition period from to SemiLEDs Corporation Delaware 20-2735523 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification Number) 3F, No. 11 Ke Jung Rd., Chu-Nan Site, Hsinchu Science Park, Chu-Nan 350, Miao-Li County, Taiwan, R.O.C.] [1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER OF THE SARBANES-OXLEY ACT OF 2002 I, Trung Tri Doan, certify that: 1. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,] [CERTIFICATION OF CHIEF FINANCIAL OFFICER OF THE SARBANES-OXLEY ACT OF 2002 I, Timothy Lin, certify that: 1. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading] [CERTIFICATION SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 (1) (2) Dated: April 12, 2013 EX-32.1 4 a13-7203_1ex32d1.htm EX-32.1] [CERTIFICATION SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 Interim (1) (2) Dated: April 12, 2013 EX-32.2 5 a13-7203_1ex32d2.htm EX-32.2]