0001193125-16-585647 SC 13G/A 1 20160510 20160510 ADT Corp 0001546640 7381 454517261 DE 0925 SC 13G/A 34 005-87032 161636198 1501 YAMATO ROAD BOCA RATON FL 33431 561-988-3600 1501 YAMATO ROAD BOCA RATON FL 33431 DODGE & COX 0000200217 0000 000000000 CA 1231 SC 13G/A 555 CALIFORNIA STREET 40TH FLOOR SAN FRANCISCO CA 94104 4159811710 555 CALIFORNIA STREET 40TH FLOOR SAN FRANCISCO CA 94104 SC 13G/A 1 d193019dsc13ga.htm SCHEDULE 13G AMENDMENT NO. 4