Foreign investors holding at least US $1.5 million shares in either real estate or venture capital investment funds for three years are now entitled to Turkish citizenship. Citizenship will only be given if the Capital Markets Board confirms these details.
The Regulation Amending the Regulation on Implementation of the Turkish Citizenship Law was published in Official Gazette number 30057 on 5 May 2017, entering into force on the same date. Please see this link for the full text (only available in Turkish).