X0306 4 2013-07-22 0 0001378718 Wesco Aircraft Holdings, Inc WAIR 0001525168 Weinstein Hal C/O WESCO AIRCRAFT HOLDINGS, INC. 27727 AVENUE SCOTT VALENCIA CA 91355 0 1 0 0 Exec. VP Sales and Marketing Common Stock 2013-07-22 4 S 0 15000 18.92 D 19000 I By SJB 2012 Insurance Trust Common Stock 2013-07-23 4 S 0 15000 19.05 D 4000 I By SJB 2012 Insurance Trust Common Stock 389428 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 14, 2013. The price reported is a weighted average price. These shares were sold in multiple transactions at per share prices ranging from $18.81 to $19.07. The reporting person undertakes to provide the Company, any security holder of the Company or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote 2. The price reported is a weighted average price. These shares were sold in multiple transactions at per share prices ranging from $18.89 to $19.15. The reporting person undertakes to provide the Company, any security holder of the Company or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote 3. /s/ Gregory A. Hann, as Attorney-in-Fact 2013-07-24