use warnings;
use strict;
my $RE = qr! \b ( SA | NV | LTD | CO | LLC ) \b !ix ;
while (<DATA>) {
    s/$RE//g;
    print;
}

__DATA__
Bobs Warehouse SA LTD
Jims Fine Wines CO LLC
[download]

Outputs:

Bobs Warehouse
Jims Fine Wines
[download]