0001193125-15-223477 SC TO-I/A 1 20150615 20150615 Bristow Group Inc 0000073887 4522 720679819 DE 0331 SC TO-I/A 34 005-34191 15931862 2103 CITY WEST BLVD. 4TH FLOOR HOUSTON TX 77042 7132677600 2103 CITY WEST BLVD. 4TH FLOOR HOUSTON TX 77042 OFFSHORE LOGISTICS INC 19920703 Bristow Group Inc 0000073887 4522 720679819 DE 0331 SC TO-I/A 2103 CITY WEST BLVD. 4TH FLOOR HOUSTON TX 77042 7132677600 2103 CITY WEST BLVD. 4TH FLOOR HOUSTON TX 77042 OFFSHORE LOGISTICS INC 19920703 SC TO-I/A 1 d943453dsctoia.htm SC TO-I/A