#!/bin/bash

comp1=($(cat text1.txt | cut -d\; -f 3,4))
comp2=($(cat text2.txt | cut -d\; -f 3,4))

for str in ${comp1[*]}; do
   i=0
   while (( $i < ${#comp2[*]} )); do
      if [[ $str = ${comp2[i]} ]]; then
         cat text1.txt | grep $str
      fi
      (( i += 1 ))
   done
done