Stellex Capital Management

What Stellex Capital Management does

Stellex Capital Management is a private equity firm founded in 2015 by Ray Whiteman and Michael Stewart, both former Partners at The Carlyle Group who co-headed Carlyle Strategic Partners. The firm invests in middle-market companies in North America and Europe with typical equity checks of $75–$150 million at enterprise values of $100–$500 million, and it structures majority and minority recapitalizations, carve-outs, turnarounds, structured financings, and first-time institutional capital transactions. Stellex's investment thesis centers on "embracing complexity" and executing operational transformations rather than financial engineering, and it serves family businesses, independent sponsors, and corporates on divestitures, joint ventures, and take-privates.

Stellex's portfolio is concentrated in five verticals — Aerospace, Defense & Government Services; Business & Industrial Services; Food Products & Services; Transportation, Logistics & Distribution; and Manufacturing, Industrial & Automotive — and spans roughly 30+ operating companies. Representative holdings include David Brown Santasalo (engineered industrial gear systems, 26 locations across six continents, 1,100+ employees), J. Skinner Baking Partners (400M+ units annually across 35,000+ retail doors), RTC Aerospace (precision aerospace and defense components), A. Stucki Company (rail components), Dennis & Co. (multi-brand automotive dealership group), G2 Risk Solutions (data and risk analytics), and TriplePoint MEP (specialty mechanical and electrical services for data centers, advanced manufacturing, and healthcare). Recent carve-outs include the ~€385 million EV Dürr environmental technology business and the Survitec Beaufort aerospace and defense division.

The firm's revenue model is private equity fund management: management fees and carried interest on its middle-market buyout funds, sourced primarily through institutional LPs and family offices. Operating geography spans the U.S. (New York headquarters, with offices in Ann Arbor/Detroit and Pittsburgh) and Europe (London regional headquarters), and the firm has been actively building Stellex Resource Group — a dedicated portfolio operations, talent, and supply chain transformation platform staffed by senior hires from Platinum Equity, Heidrick & Struggles, Walmart, and Korn Ferry — to institutionalize its operational value-add thesis across the portfolio.

Name

Stellex Capital Management

Legal name

Stellex Capital Management LLC

Website

https://www.stellexcapital.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

51–100 employees

Short description

Stellex Capital Management is a private equity firm founded in 2015 by ex-Carlyle Group Partners Ray Whiteman and Michael Stewart that invests $75–$150 million in middle-market companies in North America and Europe. It focuses on transitional situations, carve-outs, and operational transformations across aerospace and defense, industrial services, food, transportation, and manufacturing sectors.

Ownership category

akta.pro rank

Product category

Private Equity Investment Management

NAICS

Portfolio Management and Investment Advice (523940), Portfolio Management and Investment Advice (52394)

SIC

Investment Advice (6282)

akta.pro primary industry

Insurance General Accounts (Institutional Asset Owners) (FSAAAGAG)

Keywords

• Private equity investing
• Middle-market buyouts
• Portfolio operations
• Recapitalization services
• Special situation investments

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Private Equity Fund Management: Stellex Capital Management generates revenue through management fees and carried interest from its private equity funds. The firm invests in middle-market companies undergoing transitions and special situations, with typical investment sizes of $75-$150 million at enterprise values of $100-$500 million.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Stellex Capital Management is a private equity firm that invests in middle-market companies in North America and Europe, typically deploying $75–$150 million at enterprise values of $100–$500 million. The firm executes majority and minority recapitalizations, carve-outs, turnarounds, structured financings, and first-time institutional capital transactions, then supports portfolio companies through Stellex Resource Group with customized operational transformation plans across aerospace and defense, business and industrial services, food products, transportation and logistics, and manufacturing, industrial, and automotive sectors. Revenue is earned through management fees and carried interest on its private equity funds.

Product overview

Stellex Capital Management is a private equity firm that invests in middle-market companies in North America and Europe. The firm does not offer a unified software product but rather provides private equity investment management services with a portfolio of portfolio companies across multiple sectors including aerospace/defense, business & industrial services, food products & services, transportation/logistics/distribution, and manufacturing/industrial/automotive. The firm's investment strategy focuses on companies facing transitional crossroads, providing flexible capital solutions and operational transformation support rather than financial engineering.

Differentiator

Problem solved

Functional benefit

Products and services

• Private Equity Investment Management Services End-to-end private equity investment management for middle-market companies in North America and Europe. Includes sourcing, executing, and managing majority and minority recapitalizations, carve-outs, turnarounds, structured financings, and first-time institutional capital transactions, with typical investment sizes of $75–$150 million at enterprise values of $100–$500 million. Services are delivered directly to business owners, family businesses, independent sponsors, and corporate divestiture teams.
• Stellex Resource Group — Portfolio Operational Transformation In-house operational transformation platform supporting Stellex portfolio companies with commercial transformation, supply chain transformation, portfolio operations, and portfolio talent functions. Provided to portfolio companies as part of Stellex's value creation model.

Quantifiable outcome

• Over $500 million in revenue achieved by portfolio company TriplePoint MEP
• +2 more outcomes

Named customers5 records

Segments6 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators17 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• Wynnchurch Capital: Middle-market private equity firm investing in industrial, business services, and specialty manufacturing companies undergoing operational or financial transitions. Comparable in deal size, sector focus, and operational-transformation value proposition to Stellex.
• Platinum Equity: Operationally focused private equity firm specializing in carve-outs, divestitures, and complex situations across industrial, services, and consumer sectors. Direct comparable on operational alpha approach and transition-oriented deal strategy, though operating at a larger scale.
• Pfingsten Partners: Middle-market private equity firm focused on industrial, business services, and consumer companies with an operational improvement playbook. Closely comparable in fund size, deal size, sector overlap, and operational value-add orientation.
• Sun Capital Partners: Middle-market private equity firm investing in operationally intensive businesses in industrial, consumer, and business services sectors. Comparable in middle-market orientation, sector breadth, and operational improvement focus.
• Centre Lane Partners: Middle-market private equity firm focused on businesses undergoing change, with investment sizes and sector focus (consumer, industrials, services) closely aligned to Stellex. Direct comparable in deal size and transition-themed strategy.
• Olympus Partners: Middle-market private equity firm with multi-sector focus including industrial, business services, and consumer products. Comparable in fund size, hold periods, and operational value-add orientation.
• High Road Capital Partners: Lower middle-market private equity firm focused on industrial, business services, and consumer companies with an operational improvement thesis. Closely comparable on deal size, sector focus, and operational transformation approach.
• New Water Capital: Middle-market private equity firm focused on consumer products and industrial companies, including carve-outs from larger corporations. Comparable in deal size, sector focus on consumer/industrial, and operational improvement orientation.
• KPS Capital Partners: Middle-market private equity firm specializing in industrial and manufacturing turnarounds, restructurings, and operational turnarounds. Closely aligned with Stellex's transition/special-situations industrial focus, though typically at slightly larger investment sizes.

Broad incumbents

• The Carlyle Group: Global mega-fund private equity firm where Stellex co-founders Whiteman and Stewart previously led Carlyle Strategic Partners. Stellex continues to co-invest with Carlyle (e.g., ARMADA), making Carlyle both a parent of Stellex alumni and a recurring counterparty in the middle-market industrial space.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/stellex-capital-management

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Subsidiaries34 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A29 records

Investments9 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Stellex Capital Management