Merck & Co Inc $15,754,627 Unigene Laboratories Inc $49 XOMA Corporation $300,541 Exelixis Inc $7,751,888 SiteOne Landscape Supply Inc $2,210,384 Athersys Inc (New) $181 Merck & Co Inc $15,754,627 Unigene Laboratories Inc $49 XOMA Corporation $300,541 Exelixis Inc $7,751,888 SiteOne Landscape Supply Inc $2,210,384 Athersys Inc (New) $181