Stone River Capital Partners

Stone River Capital Partners

Stone River Capital Partners was co-founded by Alex G. Markus and Guy Boitos and operates from Birmingham, Michigan. The firm pursues control-oriented acquisitions of lower-middle-market industrial companies, a segment where ownership transitions often create value. Boitos, a former Central Michigan University football player, brings an operator's lens to the portfolio, having served directly as CEO of acquired businesses. The firm's investment strategy concentrates on acquiring and actively managing industrial businesses. Confirmed portfolio exposure includes Burtek Enterprises, a defense and industrial fabrication platform, where Stone River co-invested alongside Chicago-based Wynnchurch Capital. The firm operates through direct acquisitions rather than fund commitments, with a geographic focus on the US Midwest and Great Lakes manufacturing corridor. Stone River maintains both its primary office at 261 E. Maple Road and a secondary suite at 199 West Brown Street in Birmingham, Michigan. Beyond direct investing, the principals participate in the local professional ecosystem — Boitos is a member and donor of the Birmingham Bloomfield Art Center. The firm also supports Folds of Honor, a nonprofit providing educational scholarships to families of fallen and disabled service members. Stone River's structural differentiator lies in its embedded operator model. Rather than relying solely on external management teams, the firm installs its own partners — notably Boitos — as portfolio company CEOs, collapsing the distance between ownership and operations. This creates a governance architecture uncommon among small private investment firms and mirrors the approach of larger permanent-capital vehicles that use operating partners to drive post-acquisition performance.