Private Equity Firm Business Services

Sunstone Partners

San Mateo, California, United States

Sunstone Partners is a growth-oriented private equity firm that makes majority and minority investments in technology-enabled services and software businesses.

Focus Areas
Technology-enabled services, Software investments

Tracked deals

20

20 tracked deals across 2019-2026.

Recent pace

2

2 tracked deals announced in the last 12 months.

Deal mix

Growth capital

10 growth capital · 5 addon · 5 buyout

Sunstone Partners Acquisition Volume by Year

Last 8 years

Acquisition volume by year Annual acquisition counts for the last 8 years for Sunstone Partners. 1 2019 3 2020 5 2021 3 2022 2 2023 3 2024 2 2025 ~1 est. 1 2026
Actual Full-year estimate

Supporting Data

Recent Transactions

Showing the 12 most recent of 20 tracked deals for Sunstone Partners.

  • Sunstone Partners Invests in Peloton Consulting Group
    May 13, 2026
    Buyer
    Sunstone Partners, Crescent Capital Group
    Target
    Peloton Consulting Group
    Industry
    Professional Services
    Location
    Massachusetts, United States
    Type
    Growth capital

    Peloton Consulting Group, an Oracle partner specializing in AI-driven transformations, announced a strategic investment from Sunstone Partners. The investment is intended to accelerate Peloton’s organic and inorganic growth, enhance innovation, expand service offerings, and scale capabilities across Oracle Cloud, data/analytics, and AI technologies.

  • Sunstone Partners Acquires Majority Stake in Clearwater
    September 30, 2025
    Buyer
    Sunstone Partners
    Target
    Clearwater
    Seller
    Altaris, LLC, other existing shareholders
    Industry
    Cybersecurity
    Location
    Tennessee, United States
    Type
    Buyout

    Sunstone Partners, a growth-oriented private equity firm, has acquired majority ownership of Clearwater from Altaris, LLC and other existing shareholders. The investment will support Clearwater’s expansion of managed security, consulting, and software capabilities across the healthcare ecosystem and the defense industrial base (via its Redspin division).

  • Knowtion Health Acquires Switch RCM
    June 23, 2025
    Buyer
    Knowtion Health, Arsenal Capital Partners, Sunstone Partners
    Target
    Switch RCM
    Industry
    Healthcare Services
    Location
    Wisconsin, United States
    Type
    Addon

    Knowtion Health, a Boca Raton-based, PE-backed revenue cycle management provider, has completed the acquisition of Switch RCM, a data- and technology-first healthcare revenue intelligence firm based in Madison. The deal expands Knowtion’s automation, analytics and recovery capabilities and brings multiple Switch leaders into Knowtion’s executive and innovation teams; terms were not disclosed.

  • Sunstone-Backed Accuhealth and Signallamp Merge to Form TelliHealth
    December 11, 2024
    Buyer
    Sunstone Partners, Accuhealth
    Target
    Signallamp Health, Accuhealth
    Industry
    Healthcare Services
    Location
    Florida, United States
    Type
    Addon

    Accuhealth and Signallamp Health have merged with additional investment from Sunstone Partners to form the newly rebranded TelliHealth, creating an integrated remote care company offering Remote Patient Monitoring (RPM) and Chronic Care Management (CCM). Sunstone provided the financing for the combination; the consolidated business will serve physician practices and health systems across the United States and has appointed Asif Ahmad as CEO of TelliHealth.

  • Arsenal Capital Partners Acquires Knowtion Health
    August 22, 2024
    Buyer
    Arsenal Capital Partners, Sunstone Partners
    Target
    Knowtion Health
    Seller
    Sunstone Partners
    Industry
    Healthcare Services
    Location
    Florida, United States
    Type
    Buyout

    Arsenal Capital Partners has signed a definitive agreement to acquire Knowtion Health, a provider of AI-enabled revenue cycle and insurance claim resolution services. Sunstone Partners, the current majority owner, will remain a strategic co-investor; financial terms were not disclosed.

  • Sunstone Partners Makes Growth Investment in Accuhealth
    April 16, 2024
    Buyer
    Sunstone Partners
    Target
    Accuhealth
    Industry
    Healthcare Services
    Location
    Texas, United States
    Type
    Growth capital

    Sunstone Partners, a growth-oriented private equity firm, has made a growth investment in Accuhealth to support the company’s expansion of its remote patient monitoring (RPM) and chronic care management (CCM) offerings. As part of the investment, Chris Schmaltz will join as Executive Chairman and Jennifer (Jeni) Bahr will join as CFO to help accelerate Accuhealth's growth and product/service expansion across physician practices and health systems.

  • EverService (Sunstone) Acquires iLawyer Marketing with Capital Infusion from Audax Strategic Capital
    September 14, 2023
    Buyer
    Audax Strategic Capital, Sunstone Partners, EverService Holdings, LLC
    Target
    iLawyer Marketing
    Industry
    Marketing & Advertising
    Location
    California, United States
    Type
    Addon

    Audax Strategic Capital provided a structured equity investment into EverService, a Sunstone Partners portfolio company, to support organic growth and M&A activity. EverService used the capital to acquire iLawyer Marketing, a San Diego-based legal-focused digital marketing firm, expanding EverService's end-to-end legal client acquisition and engagement capabilities; terms were not disclosed.

  • Thoma Bravo and Sunstone Partners Complete Acquisition of UserTesting
    January 12, 2023
    Buyer
    Thoma Bravo, Sunstone Partners
    Target
    UserTesting, Inc.
    Industry
    Cloud & SaaS
    Location
    California, United States
    Type
    Buyout

    UserTesting, a video-based human insight platform, was acquired in an all-cash transaction valued at approximately $1.3 billion by Thoma Bravo and Sunstone Partners. The deal was completed after stockholder approval, and UserTesting will no longer be publicly traded and will be combined with UserZoom under the UserTesting name.

  • 66degrees and Pandera Systems Merge with Growth Investment from Sunstone Partners
    October 25, 2022
    Buyer
    Sunstone Partners, 66degrees
    Target
    Pandera Systems, 66degrees
    Industry
    Cloud & SaaS
    Location
    United States
    Type
    Growth capital

    Cloud professional services firms 66degrees and Pandera Systems have merged and received additional growth equity from Sunstone Partners to create the second-largest pure-play Google Cloud services firm in North America. The combined business expands 66degrees' data & analytics, cloud migration, security and application modernization capabilities and will have roughly 500 employees across offices in Denver, Chicago, Orlando and India.

  • Knowtion Health (Sunstone-backed) Acquires Amplus
    October 7, 2022
    Buyer
    Knowtion Health, Sunstone Partners
    Target
    Amplus
    Industry
    Healthcare Services
    Location
    California, United States
    Type
    Addon

    Knowtion Health, a Sunstone Partners-backed healthcare revenue cycle management (RCM) company based in Boca Raton, Florida, has acquired Amplus, an RCM A/R resolution and technology services provider headquartered in Torrance, California. The add-on transaction will expand Knowtion's low-balance recovery capabilities by combining Amplus's machine-learning-enabled recovery tools and experienced billing team with Knowtion's broader RCM platform.

  • MeetingPlay and Aventri Merge with Growth Investment from Sunstone Partners and Camden Partners
    January 6, 2022
    Buyer
    Sunstone Partners, Camden Partners
    Target
    MeetingPlay, Aventri
    Industry
    Cloud & SaaS
    Location
    United States
    Type
    Growth capital

    MeetingPlay and Aventri have merged and received a growth equity investment from Sunstone Partners and Camden Partners to form a combined, full-service event software company. The new company will integrate both firms' platforms and leadership to expand capabilities across virtual, hybrid and in-person events and scale global customer reach.

  • Sunstone Partners Invests in Vcheck Global
    November 30, 2021
    Buyer
    Sunstone Partners
    Target
    Vcheck Global
    Industry
    Professional Services
    Location
    New York, United States
    Type
    Growth capital

    Sunstone Partners, a growth-oriented private equity firm, made a strategic growth investment in Vcheck Global to accelerate the development of its technology platform and expand delivery capabilities for background check and due diligence services. Terms of the transaction were not disclosed.

Related Acquisition Pages

Healthcare Services Buyers & Acquisitions 7 tracked deals by Sunstone Partners. Cloud & SaaS Buyers & Acquisitions 5 tracked deals by Sunstone Partners. Cybersecurity Buyers & Acquisitions 3 tracked deals by Sunstone Partners. Professional Services Buyers & Acquisitions 2 tracked deals by Sunstone Partners. Acquisitions in California 4 tracked deals by Sunstone Partners. Acquisitions in Florida 3 tracked deals by Sunstone Partners. Acquisitions in Colorado 1 tracked deal by Sunstone Partners. Acquisitions in Illinois 1 tracked deal by Sunstone Partners.

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