JonesTrading Institutional Services LLC is one of the oldest and largest pure execution-only equity trading firms in the U.S., and a worldwide leader in U.S. equity block trading. Since 1975, the sole focus of JonesTrading has been creating liquidity for institutions on an agency basis. The ability to provide a secure, trusted platform connecting a diverse group of market players enables the firm to unlock liquidity, providing best-quality execution for larger and more complex trades.