Former Nasdaq chief Greifeld to take over as Virtu chairman Jun 14, 2017 | Bad Credit Loans, Bank Lending, Business Lending, Business Loans, Capital, Economics, Finance, Non-Bank Loans, Working Capital NEW YORK (Reuters) – Former Nasdaq Inc Chief Executive Robert Greifeld will become chairman of trading firm Virtu Financial Inc’s board after the company completes its $1.4 billion takeover of rival KCG Holdings Inc .