I know he was a pretty big driving force in the 70's and 80's - he was always in the magazines, and always helping out for charity like donating an Arab foal to be auctioned or won by a child. His most famous stallion was Aramus, a son of *Naborr. He was a National Champion in Halter, Park and Driving.
The name of his place is Aramus Arabians. The farm is in Las Vegas, NV, since Mr. Newton does a nightly show there.
I remember Mr. Newton very well from the 1970s-1980s Arabian shows. There were a lot of big names associated with Arabians back in the day, and I met some really high profile people.
Those who had bought Arabians as 'investments' didn't stay in them when the market crashed, but people like Mr. Newton and the Swayzes continued to breed, ride, and show them, because they simply love the Arabian horse.