1_Fragment_Pool Folder containing reFORMED (cores and substituents) as well as the uncurated fragments. 2_External_Test_Set Folder containing the TD-DFT calculations of the external test set. 3_Singlet_Fission_Candidates_pruned_adiabatic Folder containing the TD-DFT calculations of the (pruned) top candidates from the ucGA, as shown in Figure 7. 4_Screening_Based_on_Structure_Property_Relationships Folder containing the TD-DFT calculations of top candidates from the ML screening, as shown in Figure 8. 5_Diradical Folder containing the xyz files for the diradical analysis. Data_FORMED.csv CSV file containing the tabulated properties for the FORMED database, including SMILES.