Institutional investors hold a majority ownership of MDR through the 98.21% of the outstanding shares that they control. This interest is also higher than at almost any other company in the Oilfield Services/Equipment industry. Last, during the quarter ended December 2012, these large investors purchased a net $14.1 million shares.
| Mutual fund holders | 55.07% |
| Other institutional | 43.13% |
| Individual stakeholders | 1.80% |