Topping the bill for Australia was a Curlin colt from Lonhro's champion sprinter Bounding who was purchased at Keeneland by Godolphin for $US4.1 million.
Also among a handful of yearlings from Australian mares was a Medaglia D'Oro colt from Taste of Heaven, a mare closely related to Redoute's Choice.
The colt was knocked down for $US400,000 while an Uncle Mo colt from the G1 Caulfield Thousand Guineas winner Irish Lights - dam of Australian G2 winner Omei Sword - brought $US650,000.
Bounding has been quite a journey for her Hunter Valley breeder Glenn Burrows.
Establishing Willow Park Stud in 2001, Burrows has carved a niche with broodmares.
In 2009 Willow Park broke the Magic Millions record when it sold Princess Coup for $3 million at the National Broodmare Sale while Bounding marks an achievement that was a long time in the making.
Burrows had been keeping an eye on the Exceed And Excel mare Believe'n'Succeed, a G3 Blue Diamond Prelude winner, and negotiated with her connections to buy her privately.
He determined that Believe'n'Succeed would be an attractive and commercial match with Lonhro and the subsequent filly – Bounding – was sold by Willow Park for $425,000 at the 2012 Easter Yearling Sale.
She would go on to become New Zealand's champion sprinter before her owner Gary Harding asked Willow Park to put her through the 2016 Magic Millions National Broodmare Sale.
She was snapped up by the renowned US breeders Stonestreet Thoroughbreds for $1.9 million, a result which turned into $US4.1 million jackpot last week.
Believe'n'Succeed was exported to Ireland in 2015 where her first northern hemisphere foal Anthony Van Dyck won this year's Epsom Derby.