# Stone River Capital Partners

Stone River Capital Partners is an Asset Manager based in Birmingham, United States.

## Overview

- **Organization type:** Asset Manager
- **Headquarters:** Birmingham, United States
- **Region:** North America
- **Address:** 261 E. Maple Rd, Birmingham, MI 48009, United States
- **Assets under management:** Undisclosed
- **Website:** stonerivercap.com

## Regulatory record

- **Reports private funds:** No

## About

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.

## Sectors

- Industrial Tech
- Real Estate

## Offices

- 199 West Brown Street, Suite 260, Birmingham, MI 48009

## People

- Alex G. Markus — Co-Founder and Partner
- Guy Boitos — Partner

## Questions

### Who makes investment decisions at Stone River Capital Partners?

Alex G. Markus and Guy Boitos, the co-founders and partners, lead investment decisions. Boitos also operates as CEO inside multiple portfolio companies, meaning investment and operational decisions are closely aligned at the top of the firm.

### What types of companies does Stone River Capital Partners target?

The firm targets control acquisitions of lower-middle-market industrial businesses in North America. Its known portfolio includes Burtek Enterprises, a defense and industrial fabrication company, where it co-invested alongside Wynnchurch Capital.

### Does Stone River invest through a fund or make direct acquisitions?

Stone River makes direct acquisitions rather than operating a traditional fund structure. The firm acquires controlling stakes and places its own partners into operating roles at portfolio companies.

### What is Guy Boitos's role beyond being a partner?

Guy Boitos serves as CEO of several Stone River portfolio companies, giving the firm an embedded operating capability. He is a former Central Michigan University football player and brings an athlete-turned-operator mindset to post-acquisition management.

### Where does Stone River Capital Partners focus geographically?

The firm is headquartered in Birmingham, Michigan, and focuses on North American acquisitions, with a particular concentration in the Midwest and Great Lakes industrial corridor.

### Does Stone River co-invest with other firms?

Yes. In its acquisition of Burtek Enterprises, Stone River co-invested alongside Wynnchurch Capital, a Chicago-based middle-market private equity firm. The firm is open to partnering on deals where complementary capital or expertise is additive.

## Related profiles

- [Stoneridge PMG Advisors](https://altss.com/profile/stoneridge-pmg-advisors)
- [Stone Road Capital](https://altss.com/profile/stone-road-capital)

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Last updated: 2026-06-03T20:00:00.000Z

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