On Pg 4 Northern Trust also write in their Modern Slavery Statement:

"The broad geographic footprint of suppliers to the Bank’s Australian or U.K. business is shown in Figures 2 and 3 below. The maps shown are based on the responses of those suppliers that completed the Modern Slavery Questionnaire. When suppliers of all of our locations are considered, the significant majority of our suppliers are based in the U.S."

The company also has two maps on pg 4 which are separated by:

"RESPONDING SUPPLIERS (SUPPLIERS TO THE BANK’S AUSTRALIAN OR U.K. BUSINESSES) TO PILOT MODERN SLAVERY QUESTIONNAIRE By country of registration (headquarters) and RESPONDING SUPPLIERS (SUPPLIERS TO THE BANK’S AUSTRALIAN OR U.K. BUSINESSES) TO PILOT MODERN SLAVERY QUESTIONNAIRE By Locations of global operations."