Sure, it should be as simple as putting it all in a loop. Just put your urls into single quoted strings, and separate with a comma, as shown below.

#!/usr/bin/perl
use strict;
use warnings;
use LWP::UserAgent;
use HTTP::Request::Common qw(GET);
use HTML::TokeParser::Simple;

my $ua = LWP::UserAgent->new;
# Define user agent type
$ua->agent('MyApp/0.1 ');

my @requests = ( 
'http://finance.yahoo.com/actives?e=us',
'http://finance.yahoo.com/actives?e=o AMEX',
'http://finance.yahoo.com/actives?e=aq', 
'http://finance.yahoo.com/actives?e=nq',
);

# loop thru them

foreach my $requested ( @requests ) {

 print "STARTING $requested ###########################\n\n\n\n\n"; 
 
 # Request object
 my $req = GET $requested;

 # Make the request
 my $res = $ua->request($req);

 my $con = $res->content;
 #print "$con\n";

 my $p = HTML::TokeParser::Simple->new( \$con );

 while ( my $token = $p->get_token ) {
    # This prints all text in an HTML doc (i.e., it strips the HTML)
        next unless $token->is_text;
    print $token->as_is, "\n";
     }

print "ENDING $requested ###########################\n\n\n\n\n\n"; 

} # end of loop

exit 0;
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