Lance Hill, managing director of print services at 4DM, said: "Twenty years is a long time and the business has been through quite a transition over that period.
"The success that the group has achieved would not have been possible without the loyal service and commitment from our staff that have helped build our fantastic reputation.
"Recognition also has to go to our customers and suppliers who have supported us during this time and hopefully for another 20 years to come."
The Kettering, Northants-based business, which also reached the second anniversary of its MBO earlier this month, was originally founded as trade DM house Hobs, before changing its name to 4DM in 1997.