Institutional investors hold a majority ownership of ESRX through the 86.81% of the outstanding shares that they control. This interest is also higher than at almost any other company in the Services to the Health Industry industry. Last, during the quarter ended December 2012, these large investors purchased a net $7.4 million shares.
| Other institutional | 46.29% |
| Mutual fund holders | 40.52% |
| Individual stakeholders | 0.20% |