X0306 4 2018-05-25 0 0001408710 Fabrinet FN 0001541687 Ng Toh-Seng C/O FABRINET USA, INC. 3736 FALLON ROAD #428 DUBLIN CA 94568 0 1 0 0 Chief Financial Officer Ordinary Shares 2018-05-25 4 M 0 21638 14.12 A 200887 D Ordinary Shares 2018-05-25 4 M 0 5550 18.60 A 206437 D Ordinary Shares 2018-05-25 4 S 0 27188 36.913 D 179249 D Stock Option (right to buy) 14.12 2018-05-25 4 M 0 21638 0.00 D 2018-11-09 Ordinary Shares 21638 0 D Stock Option (right to buy) 18.60 2018-05-25 4 M 0 5550 0.00 D 2019-03-01 Ordinary Shares 5550 0 D This sale price represents the weighted average sale price of the shares sold ranging from $36.78 to $37.01 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The shares subject to the option were fully vested and exercisable. Andrew Chew, Attorney-in-fact for Toh-Seng Ng 2018-05-25