"We are delighted at the prospect of having Adamantem Capital on board as our new majority owner," McWhirter said.
"Adamantem brings a wealth of knowledge, which will help us to scale-up, continue to invest in innovative new products and add further value to our customers."
Heller opened the first butchery in the Christchurch suburb of New Brighton in 1985. The company now distributes a range of meats to major supermarkets.
Heller said he was proud of the growth the company had achieved in the past 33 years, bolstered by capital investment partner Rangatira Investments.
"It has been a wonderful and successful relationship with Rangatira, which has been marked by many milestones from our Auckland factory built in 2005 through to a world-class production facility established in Kaiapoi in 2011," he said.
"Rangatira was pivotal in our growth including acquisitions such as Hutton's Kiwi, Santa Rosa poultry, Gramart sauces and Walsh's meats."
Adamantem Capital managing director Angus Stuart said the private equity firm was excited to work with Hellers.
"Hellers is an iconic business with a strong market position and excellent reputation as a premier smallgoods manufacturer of sausage, bacon and ham products across New Zealand and Australia. We look forward to working with Todd, John and the entire Hellers team to help expand the business into new categories and new markets."