I found this, over on ST. It may help in making decisions on buying parts:
Pankl Racing Systems owns CP Pistons / Carrillo / Arias. The P in CP is for Pankl. Pankl builds high end rods for NASCAR and Formula 1, and is an OEM supplier for Porsche AG.
Industrial Opportunity Partners owns Edelbrock, Comp Cams (which bought and dissolved parts of Crane Cams - RIP), FAST, TCI, and Russell
Kinderhook industries owns Racing Winning Brands, which owns: JE Pistons, K1 Technologies, MGP Connecting Rods, Rekluse (moto clutches), Wiseco, Manley, Dart, Diamond Pistons, and Trend Performance.
Sentinel Capital Partners owns Drive Performance Brands, which ownes: Flowmaster, B&M Racing and Performance, Hurst Shifters, and Dinan Engineering. In 2018, Sentinel acquired Holley Performance Products, which included: Accel, Hooker, Diablosport, MSD, Superchips, Mr Gasket, APR, Earl's, Racepak, Weiand, Tremec, Mallory, etc.