Let's see....
Bach: WTC Book I, C-sharp major, D major, E-flat major, F-sharp minor, A minor, WTC Book II, C minor, C-sharp major, English Suite No.4, English Suite No.5
Chopin: Op.28 No.1 in C major, No.5 in D major, No.19 in E-flat major
Debussy: Prelude from Suite bergamasque, Prelude from Pour le piano
Rachmaninov: Op.23 No.3 in D minor, No.5 in G minor, No.6 in E-flat major, Op.32 No.3 in E major, No.5 in G major, No.8 in A minor, No.10 in B minor, No.11 in B major
Shostakovich: Op.34 No.9 in E major, No.14 in E-flat minor, No.19 in E-flat major, No.20 in C minor, No.22 in G minor, No.23 in F major, No.24 in D minor; Op.87 No.5 in D major, No.9 in E major, No.11 in B major, No.17 in A-flat major, No.18 in F minor, No.20 in C minor, No.21 in B-flat major, No.22 in G minor, No.23 in F major
And why? Various reasons.