At least 11 Prima diesel locomotives carry the company colours of TSO now: 75008, 75017, 75019, 75025, 75036, 75101, 75103, 75104, 75106, 75107 and 75108. Current indications are that TSO will receive 10-15 Prima locomotives on hire from Akiem.

Not sporting the TSO livery, but also (to be) on hire to the company are: 75037 and 75110.