taxonomy query by current title (terms shouldn’t be a string)
$tax_query = array( array( 'taxonomy' => 'companies', 'terms' => 'get_the_title();', 'field' => 'slug', 'operator' => 'IN', ), );
$tax_query = array( array( 'taxonomy' => 'companies', 'terms' => 'get_the_title();', 'field' => 'slug', 'operator' => 'IN', ), );