Nickname: Q Owner: Carol Stephens Groom: Caitlin Martin Gender: Gelding Breed: Oldenburg Disciplines: Eventing Sire: Diarado Dam: Lantana Foal Date: 5/6/2010

QC Diamantaire started his international career with Sydney Elliott in 2016, quickly rising through the levels and producing top results from the CCI1* level up through the CCI5* level. The pair exceled in competitions all across the country, Canada, and around Europe, and represented the U.S. Eventing Team in FEI Nations Cup competitions including as part of the third-place team at Great Meadow in 2018 and at CHIO Aachen in 2022.

In 2021, "Q" made his debut at the CCI5*-L level, completing the Kentucky Three-Day Event with Elliott. The pair returned to the event the following year and finished 8th overall, then went overseas in 2023 to complete the CCI5*-L at Luhmühlen (GER). That year, they also reprented the U.S. at the Pan American Games in Santiago, Chile, winning team silver.