Radiologix Inc $0 Care Guide Inc $0 Altimmune, Inc $3,778,394 American Caresource Holdings, Inc. $927 Lantheus Holdings, Inc. $1,984,540 Radiologix Inc $0 Care Guide Inc $0 Altimmune, Inc $3,778,394 American Caresource Holdings, Inc. $927 Lantheus Holdings, Inc. $1,984,540