In 2015, Lindner played in 15 LET tournaments. She had her best week of the season at the Hero Women’s Indian Open (T20).
In 2014, Lindner played in 17 LET tournaments, with her best performance secured at the ISPS Handa Ladies European Masters, T5.
In 2013, her rookie season after turning professional in December 2012, Ann-Kathrin played in 16 tournaments and earned her first LET title at the HONMA Pilsen Golf Masters, similar as her colleagues Clyburn and Jutanugarn did on their first year. She also posted a career low 65 (-5) during second round of the Lacoste Ladies Open de France. She ended fourth on the Rolex Rookie of the Year rankings and 24th on the ISPS Handa Order of Merit.
In 2014 she played 19 tournaments and recorded a best finish tied 4th at the Women’s South African Open and two more Top 10 finishes at Ladies Slovakia Open and the Aberdeen Asset Management Ladies Scotish Open. She ended 39th on the ISPS Handa Order of Merit.