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Jeff Stone
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Jeff Stone

Managing Director

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At a glance

Full Name
Jeffrey (Jeff) Stone
Title
Managing Director
Firm
Speyside Equity (Fund I team; also listed as Managing Director at successor/affiliated firm TRM Equity)
Firm Type
Private equity — operationally focused lower-middle-market buyout and special-situations firm (*not* an angel/seed investor, contrary to the stub data)
Investment Stage
Control buyouts, carve-outs, and special situations of mature operating companies (not seed/venture)
Check Size
Fund-scale equity; Speyside targets businesses with revenues up to ~$500M (larger considered case-by-case). Fund I was $130M; Fund III closed at ~$300M in 2025
Target Company Profile
Mature, historically profitable manufacturing and distribution businesses that are underperforming or under financial/operational stress and carry balance-sheet, legal, labor, or transactional complexity
Sector Focus
Manufacturing, industrials, distribution, performance materials and specialty chemicals
Geographic Focus
North America (with cross-border/European carve-out activity)
Location
Ann Arbor / Southeast Michigan area (firm also maintains a New York presence — the 212 phone number)

Background

Jeffrey Stone is a Managing Director of Speyside Equity, an operationally focused private equity firm, where he is responsible for sourcing, executing, managing, and exiting investments. He has served both in operating roles and as a member of the boards of directors of Speyside portfolio companies. He is now also listed as a Managing Director at TRM Equity, a Southfield, Michigan-based private equity firm that describes itself as the successor to the Speyside Equity Fund I team and pursues the same lower-middle-market manufacturing and distribution strategy.

Before private equity, Stone was an investment banker with Deloitte & Touche Corporate Finance, where he focused on middle-market mergers and acquisitions. Earlier in his career he served as President of a niche manufacturer of commercial playground equipment and worked as a business development executive for a finance-and-accounting consulting firm — operating experience that fits Speyside's hands-on, "Fix & Build" turnaround approach.

Stone graduated from Hillsdale College and earned his MBA from the University of Michigan's Ross School of Business. In 2012, at age 38, he was named to Crain's Detroit Business "40 Under 40" as a Managing Director and Partner at Speyside Equity, recognizing him as a notable young leader in the Detroit-area business community.

Investment Thesis & Focus

  • Invests in mature, historically profitable manufacturing and distribution companies in North America, typically with revenues up to ~$500M — not startups or venture-stage companies.
  • Pursues complex, operationally intensive deals: corporate carve-outs from multinationals, industry consolidations, family-owned business successions, bankruptcies, work-outs, and other special situations.
  • Looks for businesses "undergoing financial or operational stress" that "possess some form of balance sheet, legal, labor, or transactional complexity" — i.e., underperformers where operational improvement and margin enhancement can unlock value.
  • Employs Speyside's stated "Fix & Build" strategy — taking a hands-on operating role, then bolting on acquisitions to build platforms.
  • Full deal lifecycle ownership: Stone personally handles "sourcing, executing, managing, and exiting investments," and often sits on portfolio company boards or steps into operating roles.

Notable Investments

  • Opta Group LLC — Speyside's flagship platform. Formed in 2019 by amalgamating Opta Minerals (Toronto; acquired and taken private in 2016) with SKW Metallurgie (Munich; debt acquired 2017, converted to equity and taken private). A vertically integrated provider of performance materials and chemicals for the steel, construction, aluminum, glass, foundry, and water/wastewater industries.
  • Opta Group continuation vehicle — In 2023, Speyside completed a ~$620M continuation fund to support Opta's continued growth (announced via PR Newswire, August 2023).
  • NuFlux LLC and Nupro Corporation — Bolt-on acquisitions announced by Opta Group on October 19, 2023 (engineered steelmaking/foundry materials and metallurgical technology).
  • Pacific Steel Casting Company (Berkeley, CA) — A Speyside-linked portfolio situation that went through bankruptcy proceedings (reported 2019).
  • Across Fund I (2016, $130M), Speyside executed nine platform investments and 12 bolt-on acquisitions, giving Stone broad deal experience within the fund.

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