Anthony Manganaro, chairman and co-owner of Siena Farm in Paris, Ky., died Sunday at his summer home in Saratoga Springs, N.Y. He was 79. Manganaro, who grew up outside of Boston, was successful in a number of business ventures, including supply-distribution company Boston Medical Corporation; the real estate development firm Siena Corporation in Maryland; and ezStorage Corporation, one of the nation’s largest regional self-storage companies. That allowed him to later delve into an interest in horse racing developed when attending the races at Suffolk Downs as a young man. In 2007, Manganaro purchased a tract of land in Paris that he would develop into Siena, working alongside general manager Ignacio “Nacho” Patino and president David Pope. Siena is known for a boutique breeding operation that produced homebred Grade 1 winner Angela Renee, later sold for $3 million as a broodmare prospect. The farm also bred and raced graded stakes winner Isabella Sings and stakes winner Alura Michele, both of whom went on to broodmare careers at the farm. Siena also invested in a number of racing partnerships on major stars. Most recently, it was in the spotlight as a partner in unbeaten 2022 Horse of the Year and Breeders' Cup Classic winner Flightline, along with Hronis Racing, Summer Wind Farm, West Point Thoroughbreds, and Woodford Racing. Siena bought a share in Always Dreaming before the colt won the 2017 Florida Derby and Kentucky Derby, sharing that run with West Point as well as Brooklyn Boyz Stables, St. Elias and Teresa Viola Racing Stables, and MeB Racing Stables. Siena also owned a piece of multiple Grade 1 winner Catholic Boy with Robert LaPenta, Madaket Stables, and Twin Creeks Racing. Siena was active at the Fasig-Tipton Saratoga selected yearling sale earlier this month, purchasing three colts with regular partners WinStar Farm and China Horse Club, led by a $1 million Into Mischief colt.