This site has complete credits (click the icon), surely from the album itself.
All arranged by the composer themselves, except:
Masahiro Aoki: 1.16, 1.25, 2.08, 2.13, 2.14, 2.20
Rei Kondoh: 1.21, 2.24
CHAMY.Ishi: 1.23
Yasutaka Hatade: 2.03
The missing composers:
Masahiro Aoki: 1.24
CHAMY.Ishi: 1.09
From the list we also get credits for older games, yay. Ex. 1.21 is (I believe) from SB2, which had no breakdown, seems it's composed by CHAMY.
(note that some of the themes included here are actually from SB3, that didn't make it to the ost)