Robinson, the custom manufacturer of plastic and paperboard packaging, grew sales by 15% in the first four months of 2018.
Underlying volumes were 10% higher with the balance of the increase attributable to resin prices and foreign exchange rates.
With higher costs associated with plans for business growth, profits are at a similar level to 2017.
The outlook for the year remains in line with market expectations.
At 8:59am: (LON:RBN) Robinson PLC share price was 0p at 70p