The short-selling of exchange-traded funds (ETFs) creates "phantom" ETF shares, trading at ETF market prices, with cash flows rights but no associated voting rights. Unlike regular ETF shares backed by the underlying securities of the ETF and voted as directed by the sponsor, phantom ETF shares are backed by collateral that is not voted. Introducing a novel measure of phantom shares both of the ETF and corresponding underlying securities, we find that increases in phantom shares are associated with decreases in number of proxy votes cast (for and against), and increases in broker non-votes, the vote premium, and value-reducing acquisitions.