A punter who won $10 million at the TAB on Saturday is choosing to stay anonymous.

The Auckland man correctly predicted the finishing order of the 12 entrants in Sydney's Everest horse race.

The odds were one in just over 479 million.

Entain managing director Cameron Rodger says the man's just an average punter.

"He's pretty stoked, he sort of said when I talked to him that it's all sinking in right now- he thought it was a hoax when we first rang him. I was honest with him and said- I thought it was a hoax when you first rang me."

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