| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Cascade Investment, L.L.C. | 7.5% | 3,621,636 | 3,621,636 | 0 | /s/ Alan Heuberger | Alan Heuberger, Attorney-in-fact for Michael Larson, Business Manager | |
| William H. Gates III | 7.5% | 3,621,636 | 3,621,636 | 0 | /s/ Alan Heuberger | Alan Heuberger, Attorney-in-fact |