His six-year-old cow, Makuri Gold Amber-ET EX2, also won several accolades, including supreme champion Holstein Friesian cow.
It was her first time in the show ring.
"She's never been shown before, but she's always been quiet is a really sweet cow who's a dream to work with," says Mark.
Amber was born after Mark and a friend imported 10 embryos following a trip to Canada.
"I got to see four generations of the same cow family in one barn. That's unusual in Canada," he says.
"We sold her full sister two years ago for $13,500."
It was the first time cattle have competed at the Stratford A&P Show since 2017.
Cattle classes were cancelled last year because of the threat posed by the Mycoplasma bovis outbreak.
Two-year-old heifer Larkspur Beemer Libby-ET, owned by Palmerston North-based Fusion Genetics, was named the Holstein Friesian intermediate North Island champion.
Yearling heifer Hukaview Darlingo August-ET took out the Holstein Friesian junior North Island champion title.