Calculations for the W4-17 and BH76 sets were done with def2-QZVPPD 68 ba-sis sets and gridsize m3. Computations on GMTKN55 used def2-QZVP basis sets (with augmentation by diffuse functions for a few subsets, as described in ref. 52) and gridsize m4, consistent with literature procedures. Additional evaluations of LH24n-B95-D4 and LH24n-D4 on real-world organometallic transition-metal reaction energies (MOR41 83 and ROST61 ) and barrier heights (using a modified MOBH35 subset called MOBH28 ), def2-QZVPP 82 basis sets, along with the def2-ecp-type Stuttgart-Dresden scalar-relativistic pseudopotentials for 4d and 5d transition-metal atoms, gridsize m5, and the RI approximation were employed.