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Keystone Capital

North America, Illinois, United States, Chicago

Description

Keystone Capital, based in Chicago, Illinois, is a private investment firm distinguished by its long-term, entrepreneurial approach to acquiring and growing middle-market businesses. Unlike traditional private equity firms that often focus on predefined exit timelines, Keystone emphasizes patient capital and operational value creation, aiming to build enduring companies. The firm's partners are seasoned entrepreneurs who have successfully built and sold businesses themselves, providing a unique perspective and hands-on support to their portfolio companies. This model fosters a collaborative environment where strategic guidance and operational expertise are prioritized over short-term financial engineering.

The firm targets businesses with enterprise values ranging from $10 million to $250 million, demonstrating a clear focus on the robust middle market segment. Keystone Capital typically commits equity investments between $10 million and $75 million per transaction, indicating its capacity to support significant growth initiatives while maintaining flexibility in deal structure, including both control and minority positions. While industry-agnostic, Keystone has developed particular expertise and interest in sectors such as business services, engineering & technical services, food & beverage, industrial technology, packaging, specialty manufacturing, and software & technology.

Keystone Capital's "different approach" is rooted in its commitment to fostering sustainable growth. They are not bound by typical fund cycles, allowing them to make decisions based on the long-term health and potential of a business rather than immediate returns. This patient capital strategy, combined with the operational acumen of its partners, enables portfolio companies to invest in strategic initiatives, expand market reach, and enhance operational efficiencies without the pressure of a rapid liquidity event. Their model is designed to be a true partnership, providing resources and mentorship to management teams.

This comprehensive support system, coupled with their flexible investment horizon, positions Keystone Capital as a compelling partner for founders and management teams seeking to scale their businesses with strategic, patient capital. Their track record reflects a consistent ability to identify promising middle-market companies and provide the necessary resources and expertise to unlock their full potential over an extended period.

Investor Profile

Keystone Capital has backed more than 53 startups, with 2 new investments in the last 12 months alone. The firm has led 8 rounds, about 15% of its total and boasts 21 exits across its portfolio.

Investment Focus Highlights

  • Concentrates on Private Equity, Series Unknown, Series B rounds (top funding stages).
  • Majority of deals are located in United States, Germany, Spain.
  • Strong thematic focus on Manufacturing, Health Care, Communications Infrastructure.
  • Led 1 rounds in the past year.
  • Typical check size: $10M – $75M.

Stage Focus

  • Private Equity (68%)
  • Series Unknown (9%)
  • Series B (8%)
  • Series C (4%)
  • Series D (4%)
  • Convertible Note (2%)
  • Post Ipo Equity (2%)
  • Series A (2%)
  • Seed (2%)

Country Focus

  • United States (91%)
  • Germany (2%)
  • Spain (2%)
  • Canada (2%)
  • Singapore (2%)
  • China (2%)

Industry Focus

  • Manufacturing
  • Health Care
  • Communications Infrastructure
  • Software
  • Consulting
  • Wireless
  • Food Processing
  • Energy
  • Enterprise Software
  • Internet
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FAQ

Frequently Asked Questions

Learn who this investor regularly partners with—both firms and angels—and explore their latest activity.

Who does Keystone Capital frequently co-invest with?

HV
North America, Alabama, United States, Huntsville
Co-Investments: 2
Safeguard Scientifics
North America, Pennsylvania, United States, Radnor
Co-Investments: 2
IC
North America, California, United States, Santa Clara
Co-Investments: 2
AV
North America, California, United States, Del Mar
Co-Investments: 2
BR
North America, Delaware, United States, Wilmington
Co-Investments: 2
ABS Capital Partners
North America, Maryland, United States, Baltimore
Co-Investments: 1
Nimes Capital
North America, California, United States, Los Angeles
Co-Investments: 2
BC
Europe, Bayern, Germany, Munich
Co-Investments: 1
Mid-Atlantic Venture Funds
North America, Pennsylvania, United States, Bethlehem
Co-Investments: 3
Apex Venture Partners
North America, Illinois, United States, Chicago
Co-Investments: 2

What are some of recent deals done by Keystone Capital?

Vrestem

Austin, Texas, United States

SaaS , Mobile Apps, Web Application ,Software Consulting

Software
SeedJun 28, 2025
Amount Raised: $300,000
Penta Fine Ingredients

Caldwell, New Jersey, United States

Penta Fine Ingredients provides chemistry-based solutions for the area of commerce.

Chemical EngineeringIndustrial EngineeringManufacturingSales
Private EquityMay 6, 2025
Barkley

Kansas City, Missouri, United States

Barkley is one of the largest employee-owned advertising agencies in the U.S. Ownership has its advantages.

Advertising
Private EquitySep 1, 2023
Novatio Solutions

Chicago, Illinois, United States

Novatio Solutions is a digital transformation company.

InternetRobotics
Private EquityAug 16, 2022
Eranovum

Madrid, Madrid, Spain

Eranovum manages the development and construction of renewable energy projects in Spain using new era energy infrastructure.

ConstructionEnergyRenewable EnergySemiconductor
Private EquityJun 15, 2022
Amount Raised: $27,712,882
Pinchin

Mississauga, Ontario, Canada

Pinchin is an engineering, building science, and health and safety consulting firm.

Environmental EngineeringHealth Care
Private EquityFeb 7, 2022
Evofem Biosciences

San Diego, California, United States

Evofem is a biopharmaceutical company that offers women reproductive and contraceptive care products.

BiopharmaHealth CareMedicalWomen's
Post Ipo EquityOct 12, 2021
Amount Raised: $10,000,000
ClearWater Solutions

Auburn, Alabama, United States

Clearwater Solutions, an operator of saltwater disposal wells.

EnergyOil and Gas
Private EquityMar 1, 2021
Inspire11

Chicago, Illinois, United States

Inspire11 is a service, digital, and management consulting firm dedicated to making an impact for clients, employees, and communities.

ConsultingManagement Consulting
Private EquityDec 1, 2020
QMENTA

Boston, Massachusetts, United States

QMENTA is a software development company that offers AI cloud-based solutions for imaging clinical trials and studies.

Artificial Intelligence (AI)Cloud ComputingImage RecognitionInformation TechnologyMachine LearningSoftware
Convertible NoteJul 1, 2020
Amount Raised: $3,800,000