About Sunstone Partners
Sunstone Partners is a private equity firm founded in 2015. It is primarily based in San Mateo, United States. As of May 2026, Sunstone Partners is an active investor with a portfolio of 50 companies, comprising 50 funding rounds and 6 acquisitions. In the last 12 months, it has participated in 2 funding rounds. The firm primarily invests in companies based in United States and Canada. Its portfolio is spread across a wide range of sectors from Enterprise Applications to HealthTech. Its latest investment was a $***** Seed round in Peloton Group on May 14, 2026
A lot of funds co-invest with Sunstone Partners, with names like StepStone Group sharing a substantial percentage of its portfolio.
Sunstone Partners has a team of 40 people, including 14 partners.
Key Metrics
Founded Year
2015
Location
San Mateo, United States
Portfolio Companies
Portfolio Sectors
Portfolio Locations
Acquisition Deals
Investment Deals
Sunstone Partners' Portfolio
Sunstone Partners has a portfolio of 50 companies. They have invested in a total of 50 companies. Their most recent investment was in Peloton Group (Seed round) on May 14, 2026. Here are the most recent investments by Sunstone Partners:Date | Company | Round | Amount | Co-Investors |
|---|---|---|---|---|
May 14, 2026 | Seed | 2609 | - | |
Oct 02, 2025 | Seed | 8865 | - | |
Nov 21, 2024 | PE | 5813 | - | |
Apr 16, 2024 | Seed | 6616 | - |
Sunstone Partners has acquired 6 companies. Their most recent acquisition was of User Testing on Oct 27, 2022. Here are the most recent acquisitions by Sunstone Partners:
Acquisition Date | Company | Short Description | Total Funding | Founded Year |
|---|---|---|---|---|
Oct 27, 2022 | Provider of platform for gathering and analyzing user experience feedback | $148M | 2007 | |
Jan 26, 2021 | Operator of an online platform providing access to slot games | - | 1997 | |
Aug 22, 2024 | Provider of low balance account audit payer services | - | 2008 | |
May 30, 2019 | Distributor of contact lenses to eye care professionals | - | 2008 |
Here is the portfolio snapshot of Sunstone Partners:
Investments by Year
The maximum number of investments were made in 2024
Acquisitions by Year
The maximum number of acquisitions were made in 2019
Portfolio by Location
Companies are primarily in United States and Canada
Portfolio by Sector
Companies are primarily in Enterprise Applications
Team profile of Sunstone Partners
Sunstone Partners has a team of 40 members including 14 Partners and 11 Principals located in United States. Sunstone Partners' team sits on the board of 2 companies.Here is a list of top team members in Sunstone Partners:
Name | Designation | Location | Board Memberships | Contact Details |
|---|---|---|---|---|
Partner | San Mateo | |||
Partner | San Francisco | - | - | |
Partner | San Mateo | - | - | |
Partner | Naples | - | ||
Partner | Fort Worth | - | ||
Partner | San Francisco | - | ||
Partner | United States | - | - | |
Partner | San Francisco | - | ||
Partner | San Francisco | - | - | |
Partner | Los Angeles | - | ||
Partner | Santa Clara | - |
Co-investors of Sunstone Partners
Over the past 11 years, 7 investors have co-invested in Sunstone Partners's portfolio companies.
- Top Co-investors of Sunstone Partners: 7 investors entered a company along with Sunstone Partners. These include investors like StepStone Group (1 company).
Sunstone Partners News
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Clearwater Receives Investment From Sunstone PartnersFinSMEs•Oct 02, 2025•Clearwater, Sunstone Partners, Myclearwater, Altaris
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Sunstone Partners Announces Growth Investment in AccuhealthBusiness Wire•Apr 16, 2024•Sunstone Partners, Accuhealth, Sunstone, Hyde Park Capital
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Cognizant Acquires Thirdera from Sunstone PartnersThemiddlemarket•Jan 23, 2024•Cognizant, Sunstone Partners
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Sunstone partners with KPMG in India as knowledge partner to help upskill studentsIndiaeducationdiary.in•Oct 05, 2023•KPMG, Sunstone Partners
