file1:
COMPANY      ABCD 764200 E  2013,12,13   2013,12,19
COMPANY      BCDX 156167 L  2013,11,29   2013,12,03
COMPANY      BCYX 165230 L  2013,12,13   2013,12,19

file2:
COMPANY      ABCD 764200 E  2013,12,13   2013,12,19
COMPANY      BCDX 156167 L  2013,12,28   2013,12,31

file3:
COMPANY      ABCD 764200 E  2013,12,13   2013,12,17
COMPANY      BCDX 156167 L  2013,11,30   2013,12,03
COMPANY      BCYX 165230 L  2013,12,13   2013,12,17
COMPANY      BCYX 156095 L  2013,11,30   2013,12,08