The Midlands firm is owned by Ranjit Boparan who has an estimated fortune of £135m.
A 2 Sisters spokesperson said: “Our continued drive to reduce costs and run our business as if we are in a recession has stood us in good stead during this difficult economic period.
“The increase in feed ingredient prices is still a real threat to our business, as it is for many other food manufacturers.
“The acquisition of the Storteboom Group fits with 2 Sisters’ business strategy and provides an established platform to support expansion into Central Europe.
“We aspire to grow the business by producing the best-quality products at the lowest cost.”