The growth comes after the company has made significant investments in facilities, equipment and people in recent years.
Stiller’s workforce has grown from 100 people in 2012 to 140 today, with turnover growing from £8m in that time.
Earlier last year, the firm spent £1.1m on a new state-of-the-art, 40,000 sq ft, 5,000-pallet warehouse, increasing its warehousing capacity by nearly 50% to 200,000 sq ft.
Commercial manager Matthew Stiller said: “We have had a good strong financial result with turnover increasing and the profitability is there to back it up.
“We’ve been putting a lot of money back into the company over the last four years, and that investment is coming good.
“I believe customers take comfort knowing their supplier is performing well and investing back into facilities, vehicles and equipment.”
Stiller’s premises on Aycliffe Business Park accommodates goods for companies all over the UK as well as local firms including the likes of Gestamp Tallent and 3M.
Its overnight Palletline operation handles more than 1,600 pallets every day, carrying goods ranging from food stuffs and packing to cookware, building cladding and shopping trollies.
But Stiller has also been boosted with extra business from Royal Mail last month in the build-up to Christmas.
Matthew added: “The Royal Mail has their own fleet of vehicles but they bring in external companies like us to deal with the Christmas rush.
“We had a few of our vehicles out on the road moving Christmas cards for the Royal Mail, which is on top of all of the other work we already have on our books, so it’s been a good way for us to round off what’s been an excellent year for the company.”