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Sean Lenahan
Private Equity Investor at
Riverside Partners LLC (New York)
Profile
Sean Lenahan is currently Operating Partner at Riverside Partners LLC (New York) since 2019 and Head of Portfolio Operations at Sunstone Partners Management LLC.
Former roles include Chief Executive Officer at Pegasus Solutions Cos.
from 2015 to 2019, Principal at Regent Equity Partners LLC from 2014 to 2019, and Growth Factors & Operating Partner at Bregal Sagemount from 2024 to 2025.
Education includes an undergraduate degree from the United States Air Force Academy in 2002 and an MBA from The Wharton School of the University of Pennsylvania in 2009.
Sean Lenahan active positions
| Companies | Position | Start |
|---|---|---|
Riverside Partners LLC (New York)
 Riverside Partners LLC (New York) Investment ManagersFinance Riverside Partners invests in small and middle market companies located across the globe with an EBITDA of USD 10 - 35 million. The firm focuses on companies operating in the fields of business, consumer, education & training, franchisors, healthcare, software & IT and specialty manufacturing & distribution sectors. It provides financing for growth stage capital transactions and provides two non-control options. | Private Equity Investor | 01/10/2019 |
Sunstone Partners Management LLC
 Sunstone Partners Management LLC Investment ManagersFinance Sunstone Partners invests in companies located in the United States with revenues of more than USD 20 million. The firm targets companies operating in the fields of AI, technology, software, healthcare IT, marketing tech, cloud and cybersecurity sectors. It provides financing for growth capital requirements with an investment size of USD 75 - 200 million. The firm also acquires majority and minority positions. | Private Equity Investor | - |
Former positions of Sean Lenahan
| Companies | Position | End |
|---|---|---|
Bregal Sagemount
 Bregal Sagemount Investment ManagersFinance Bregal Sagemount invests in companies located in the United States with an revenue of more than USD 7 million. The firm focuses on a broad range of sectors and industries. It provides financing in the form of equity and debt for growth, recapitalization, acquisition and buyout stage capital transactions with an investment size ranging from USD 15 to 100 million for credit transactions and USD 20 - 400 million for equity transactions. The firm acquires majority, minority, controlling and non controlling investments. It also acts as lead investor. | Private Equity Investor | 01/09/2025 |
Regent Equity Partners LLC
 Regent Equity Partners LLC Investment ManagersFinance Regent Equity Partners invests in companies located in the United States. The firm focuses on broad range sectors and industries. It provides financing for early stage capital requirements. | Corporate Officer/Principal | 01/10/2019 |
Pegasus Solutions Cos.
 Pegasus Solutions Cos. Regional BanksFinance Provides transaction processing and electronic commerce services to hotel industry | Chief Executive Officer | 01/05/2019 |
Training of Sean Lenahan
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
96
1st degree connections
7
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 7 |
|---|---|
Pegasus Solutions Cos.
Pegasus Solutions Cos. Regional BanksFinance Provides transaction processing and electronic commerce services to hotel industry | Finance |
Riverside Partners LLC (New York)
Riverside Partners LLC (New York) Investment ManagersFinance Riverside Partners invests in small and middle market companies located across the globe with an EBITDA of USD 10 - 35 million. The firm focuses on companies operating in the fields of business, consumer, education & training, franchisors, healthcare, software & IT and specialty manufacturing & distribution sectors. It provides financing for growth stage capital transactions and provides two non-control options. | Finance |
United States Air Force Academy
 United States Air Force Academy Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Bregal Sagemount
Bregal Sagemount Investment ManagersFinance Bregal Sagemount invests in companies located in the United States with an revenue of more than USD 7 million. The firm focuses on a broad range of sectors and industries. It provides financing in the form of equity and debt for growth, recapitalization, acquisition and buyout stage capital transactions with an investment size ranging from USD 15 to 100 million for credit transactions and USD 20 - 400 million for equity transactions. The firm acquires majority, minority, controlling and non controlling investments. It also acts as lead investor. | Finance |
The Wharton School of the University of Pennsylvania
 The Wharton School of the University of Pennsylvania Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Regent Equity Partners LLC
Regent Equity Partners LLC Investment ManagersFinance Regent Equity Partners invests in companies located in the United States. The firm focuses on broad range sectors and industries. It provides financing for early stage capital requirements. | Finance |
Sunstone Partners Management LLC
Sunstone Partners Management LLC Investment ManagersFinance Sunstone Partners invests in companies located in the United States with revenues of more than USD 20 million. The firm targets companies operating in the fields of AI, technology, software, healthcare IT, marketing tech, cloud and cybersecurity sectors. It provides financing for growth capital requirements with an investment size of USD 75 - 200 million. The firm also acquires majority and minority positions. | Finance |
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