TSM Global Berhad is principally engaged in the business of letting of properties and investment holding. TSM through its subsidiaries is engaged in the manufacture and supply of automotive wiring harnesses, automotive high-tension ignition cables, manufacture of polyvinyl chloride (PVC) wires and cables.

TSM's subsidiaries include :-
1) J.K. Wire Harness Sdn. Bhd.
2) J.K. Sumi Wire Harness Sdn. Bhd.
3) JK PSD Sdn. Bhd.