Humana Inc. Form 10-K 2015 stock total return performance (source: https://bullfincher.io/sec-proxy?url=https%3A%2F%2Fwww.sec.gov%2FArchives%2Fedgar%2Fdata%2F49071%2F000004907116000117%2Fhum-20151231x10k.htm) Graph assumes $100 invested 12/31/2010. Years: 12/31/2010 12/31/2011 12/31/2012 12/31/2013 12/31/2014 12/31/2015 HUM values: $100 $162 $128 $195 $274 $343 S&P 500: $100 $102 $118 $157 $178 $181 Peer Group: $100 $110 $129 $177 $226 $239