Mitt Romney was one of the founders of Bain Capital. Bain was reported to have over 136 Cayman Island Companies (Private Equity). Bain has over $78B under management WW.
Mitt Romney was reported to have filed 16 Form 8621s in 2010 with his US tax return. On 10 of these Form 8621s he checked the box in part II for Qualified Electing Fund (QEF).