$ cat pm_1071030_file1.txt
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
COMPANY      BCYX 156095 L  2013,11,29   2013,12,07

$ cat pm_1071030_file2.txt
COMPANY      ABCD 764200 E  2013,12,13   2013,12,19
COMPANY      BCDX 156167 L  2013,12,28   2013,12,31
COMPANY      BCYX 156095 L  2013,11,30   2013,12,08

$ cat pm_1071030_file3.txt
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
COMPANY      BCYX 156095 L  2013,11,30   2013,12,08