X0306 4 2013-07-22 0 0001378718 Wesco Aircraft Holdings, Inc WAIR 0001563063 Hess Lisa F. 16030 VENTURA BLVD., STE 320 ENCINO CA 91436 0 0 1 0 Common Stock 2013-07-22 4 S 0 9142 18.94 D 26858 I By Margate Grantor Trust A Common Stock 2013-07-22 4 S 0 9142 18.94 D 26858 I By Margate Grantor Trust B Common Stock 2013-07-23 4 S 0 26858 19.07 D 0 I By Margate Grantor Trust A Common Stock 2013-07-23 4 S 0 26858 19.07 D 0 I By Margate Grantor Trust B Common Stock 1425448 I By Randy Snyder 2009 Extended Family Trust Common Stock 1425449 I By Susan Snyder 2009 Extended Family Trust Common Stock 1278046 I By Justin Henry Snyder Exempt Trust U/T Randy Snyder 2005 Grantor Trust Common Stock 1278046 I By Justin Henry Snyder Exempt Trust U/T Susan Snyder 2005 Grantor Trust Common Stock 1278046 I By Joshua Jack Snyder Exempt Trust U/T Randy Snyder 2005 Grantor Trust Common Stock 1278046 I By Joshua Jack Snyder Exempt Trust U/T Susan Snyder 2005 Grantor Trust Common Stock 1278046 I By Todd Ian Snyder Exempt Trust U/T Randy Snyder 2005 Grantor Trust Common Stock 1278046 I By Todd Ian Snyder Exempt Trust U/T Susan Snyder 2005 Grantor Trust Common Stock 3670 I By George and Lisa Hess Trust dated October 1, 2003 Common Stock 121225 I By spouse The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 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 $18.81 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 3. On March 22, 2013, the Margate Grantor Trust B sold 14,728 shares. Due to a broker's error, the Form 4 filed on March 26, 2013 misreported the number of shares that were sold. 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 5. 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 6. The reporting person is the trust advisor for this trust, and in that role has dispositive power with respect to these shares. /s/ Lisa F. Hess 2013-07-24