Boyne Capital, a Florida-based private equity firm focused on investments in lower middle market companies, completed the acquisition of a majority stake in Sonic Systems International, a provider of mission-critical support services to the commercial nuclear power industry. Financial terms were not disclosed. “The Boyne team is pleased to join forces with Sonic’s management team and Breakwater North. Sonic differentiates itself with deep, long-tenured customer relationships, built upon its consistent reliability and responsiveness as a partner. We are excited about Sonic’s position to capitalize on the revived growth of the nuclear power industry,” Derek McDowell, Boyne Capital CEO.