The winners from two years ago edged ahead of Oliver Townend and Cooley Rosalent on the final day of the MARS Badminton Horse Trials.
The top two finishers at the MARS Badminton Horse Trials both had flag penalties which caused concern, but were later dropped.
The Olympic gold medallist squeaked ahead of yesterday's leader Tom McEwen and JL Dublin with 21.1pp in the dressage phase.
Only eight of 21 riders made it around the 5* cross-country course, while Sharon White and Jaguars Duende clinch top spot in the CCI3*-L.
The British rider is in the running to become only the third rider ever to capture the series at Mars Badminton Horse Trials next week.
A heartbreaking rail for fellow Brit Tom McEwen in stadium jumping saw him relegated to 2nd; Will Coleman and Diablo take CCI4*-S.
European champion Rosalind Canter celebrated her second 5* win this year at the French fixture which saw cross-country day shake up the standings.
Oliver Townend and Ballaghmor Class win the 2023 edition; Canada's Phoenix and Wabbit place 11th of 58 starters.
"I was just hoping to finish in the top five today" said the US rider after jumping from 3rd to 1st with a clear stadium jumping round.
Top Canadian is Jessica Phoenix with Bogue Sound in 18th place; event wraps up with stadium jumping on Sunday.