Stock Option Exchange Offer Taxation Highlights – Japan, Korea, United Kingdom JAPAN • The Exchange will likely not be considered a taxable event. You will be subject to income tax, but not social insurance contributions when you exercise any replacement options. KOREA • The Exchange will likely not be considered a taxable event. You will, however, be subject to income tax and social insurance contributions (to the extent your income had not already exceed the applicable contribution ceiling) when you exercise any replacement options. UNITED KINGDOM • The Exchange will not be considered a taxable event. You will be subject to income tax and employee National Insurance contributions (“NICs”) when you exercise any replacement options. You will also be required to pay the employer NICs due at exercise. You will be able to deduct the employer NIC liability from your income tax liability. 12 | Inphi Corporation Stock Option Exchange Offer – Employee Presentation |