2015
In December 2015, she won the Russian Cup in rhythmic gymnastics.
In the 2015 season, Annenkova made her debut at the adult international level — it happened in February at the Grand Prix "Moscow".
In March, she took part in her second adult international tournament — the 6th Baltic Hoop International Tournament held on March 14-15 in Riga. There she took 2nd place in the all-around, losing only to Belarusian Melitina Stanyuta.