Wikipedia
Littleprincessemma ( foaled Feb 27, 2006) is a Thoroughbred mare who raced twice but is notable as the dam of the American Triple Crown-winning racehorse American Pharoah. Bred by Brereton C. Jones, she sold in 2006 as a weanling filly for $135,000 ($,000 adjusted for inflation) and then the following year, as a yearling, she was purchased by Zayat Stables for $250,000 ($,000 adjusted for inflation). Put into training with Steve Asmussen, she raced twice and retired due to injury, then became a broodmare for Zayat stables. She was named after Ahmed Zayat's daughter, Emma. She is a chestnut with a blaze on her face, a stocking on her left hind leg and a sock on her right hind leg.
She was bred but did not produce a foal in 2010. Her first foal and first winning offspring was Xixixi, a 2011 colt by Maimonides. Her next foal was American Pharoah, foaled in 2012, who was sired by Pioneerof the Nile. In the fall of 2011 she had been consigned for sale when she was in foal carrying American Pharoah but did not go through the sales ring.
She did not produce a foal in 2013, but was bred back to Pioneerof the Nile again and produced a full sibling to American Pharoah, a filly, in 2014. She was later named American Cleopatra, and entered training in 2016. Later that year, in foal again to Pioneerof the Nile, Littleprincessemma sold for $2,100,000 to Summer Wind Farm. She produced a second full sibling to American Pharoah in 2015, a colt named Irish Pharaoh.
She was bred to Tapit in 2015 for her 2016 foal, a filly named Chasing Yesterday.