Very useful link, Chelsea923.
So Charlotte has:
Costa Virgio - riden mainly by Thierry Rozier
CARRYDUFF Z - riden mainly by Thierry
RUBINS QUIBELLE - Charlotte used to compete with it but since her last competition a certain Jennifer Meylan is riding it
She also uses to compete with MADISON D'OLGY, which belongs to S.A.R.L. LA MARTINIERE and that Jennifer Meylan also rides it.
These are the horses she competed with in 2013 and 2012.
Now, if we go back in time, she also owns:
Turbo - She used to ride it in the very beginning (2009/2010/2011), but the last time she rode it was in October 2011. Since than Michel Gruhn and Jennifer Meylan have been riding it.
ROCK'N ROLL 9 - She competed with it a couple of times in 2011, then Thierry competed twice in early 2012 and then nothing.
The two main horses when she re-started her "career" were GI Joe and Tintero:
GI Joe - Owned by E.U.R.L. ROBERT MICHEL. Riden by Charlotte and Thierry, and then other people in 2011 and then nothing.
Tintero doesn't appear.
So, she owns 5 horses. two of them riden mainly by Thierry and the others riden by Charlotte and some other people. The horses she used in 2009-2011 aren't seen anymore in competitions.
This all sounds quite weird from me. I don't understand much of equestrian, so maybe other members may explain this better. But doesn't she lack consistency and coherence over time? She buys a new horse, competes with it and then it either goes to Thierry and is never seen again...