 |

|
| James J. O'Connor |
Active |
| Retired Chairman and Chief Executive Officer |
1973 |
| Unicom Corporation and Commonwealth Edison Company |
| |
| Michael D. O'Halleran |
Active |
| Senior Executive Vice President |
2001 |
| Aon Corporation |
| |
| William A. Osborn |
Active |
| Chairman and Chief Executive Officer |
1994 |
| Northern Trust Corporation |
| |
| Robert S. Osborne |
NR |
| Group Vice President and General Counsel |
2005 |
| General Motors Corporation |
| |
| James Otis, Jr. |
Life |
| Chairman and Chief Executive Officer |
1978 |
| Otis Company |
 |