Equity carve-out (ECO), also known as a split-off IPO or a partial spin-off, is a type of corporate reorganization, in which a company creates a new subsidiary and subsequently IPOs it, while retaining management control.[1][2] Only part of the shares are offered to the public, so the parent company retains an equity stake in the subsidiary. Typically, up to 20% of subsidiary shares is offered to the public.