North Castle Partners, a private equity firm, completed an investment in Sparx Hockey, a developer and manufacturer of skate sharpening equipment and related accessories for ice hockey, figure skating and sled hockey. Financial terms were not disclosed. "We are proud to partner with Russ and his team. Sparx is an innovative category leader that is solving a major pain point for hockey families and offers an unparalleled value proposition to its loyal users. Sparx has experienced strong growth since its founding and we believe there is significant potential to further build on its success with increased investments in awareness, distribution and innovation," Alison Minter, North Castle Managing Director.