| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Fresenius Medical Care Holdings, Inc. | 9.5% | 18,312,735 | 0 | 18,312,735 | /s/ Bryan Mello | Bryan Mello, Assistant Treasurer | 0000042872 |
| Fresenius Medical Care AG | 9.5% | 18,312,735 | 0 | 18,312,735 | /s/ Dr. Joerg Haering | Dr. Joerg Haering, Member of the Management Board | 0001333141 |