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Summit Partners

222 Berkeley Street, 18th floor, Boston, MA, 02116, United States

Overview

Summit Partners is an investment firm that is currently investing in to growth equity, fixed income, and public equity opportunities. Summit has invested in more than 460 companies in technology, healthcare, life sciences, and other growth industries. Summit Partners enhances the value of these companies through infrastructure development, executive and board recruiting, and strategic and operational advice. The firm also brings extensive experience in helping companies navigate the complex process of public offerings or strategic sales and mergers.

Total investments
135
Lead investments
93
Investments · 12mo
5
Active investors
13

Sector focus

  • Business Development
  • Finance
  • Financial Services
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Investment portfolio

  • Keyfactor

    Led · Equity · Jul 2026

    Keyfactor offers a Trust Control Plane designed to provide centralized visibility and automated lifecycle management for machine identities, cryptographic assets, and trust systems across cloud, on-premises, and hybrid environments. The platform supports discovery, issuance, ongoing management, governance, and a path to post-quantum cryptography readiness. Keyfactor says it issues and manages billions of machine identities annually and serves more than 2,500 customers, including roughly 50% of the largest banks in the U.S. and Europe, 80% of leading U.S. retailers, and over 40% of Fortune 100 companies. The company recently achieved FedRAMP certification to support federal agency use and other government customers. Management emphasizes continued product innovation, geographic expansion, team growth, and strategic acquisitions as key priorities following the new investment. Keyfactor also reported accelerating year-over-year revenue growth and strong profitability.

  • Quantifind

    Led · Equity · Jun 2026

    Quantifind develops the Graphyte AI-native Risk Intelligence platform, which unifies internal, third-party, and open-source data and applies advanced entity resolution, Name Science™, dynamic risk typologies, and real-time network graph intelligence. It also offers Graphyte Agentic Middleware to help operationalize agentic AI within risk workflows while preserving explainability, auditability, and human oversight. The company serves a global customer base, including six of the world's top 10 Tier 1 financial institutions, and its platform supports tens of thousands of financial crime, compliance, and national security professionals. An independent Celent economic analysis cited in the announcement estimated Tier 1 banks deploying Graphyte across KYC and sanctions screening could reduce annual alert-processing costs by up to $177.9 million. Quantifind says it has generated rapid, profitable growth. The company plans to use the new capital to expand internationally across Europe, Asia-Pacific, and the Americas and to strengthen regional partnerships and regulatory alignment.

  • RunPod

    Led · Series A · Jun 2026

    Runpod operates a GPU-focused cloud platform used by developers and institutions to build and run AI workloads. The company says over a million developers are building on the platform and lists customers such as Cursor, OpenAI, and Artificial Analysis. Runpod started four years ago in a New Jersey basement and has grown largely through word-of-mouth among developer communities. Its current roadmap emphasizes expanding infrastructure and developer tooling to help customers move from experimentation to production without replatforming. Financially, Runpod just completed a $100M Series A led by Summit Partners to fund that expansion.

  • Hyperlight

    Participated · Series C · Jun 2026

    HyperLight develops high-performance integrated photonics based on thin-film lithium niobate (TFLN), commercialized as its TFLN Chiplet™ Platform. The platform targets a range of optical interconnect applications including data center pluggables, coherent datacom and telecom modules, and co-packaged optics, and offers products supporting 200G-per-lane operation with 400G-per-lane solutions now sampling. The company emphasizes ultra-high modulation bandwidth, CMOS-level drive voltage, and ultra-low optical loss to reduce power consumption at higher lane speeds. HyperLight has established a strategic manufacturing partnership with UMC and Wavetek for high-volume foundry production on both 6-inch and 8-inch wafers. With the $80 million Series C, the company plans to expand manufacturing capacity, accelerate customer qualification, scale its platform, and deepen partnerships across foundry, semiconductor, networking, and systems integration domains.

  • Stay22

    Led · Equity · Feb 2026

    Stay22 operates an intelligent, data-driven monetization platform that analyzes real-time contextual and behavioral signals to route audiences from creator and publisher content to relevant booking options across major OTAs such as Booking.com, Expedia Group and Tripadvisor. More than 5,500 creators, including Nomadic Matt, Time Out and Lonely Planet, rely on the service to identify high-value affiliate opportunities and capture booking intent. In 2025 the company processed over USD $1 billion in transactions and generated USD $80 million in GMV from its newly launched retail vertical, demonstrating traction beyond its travel roots. Stay22 sits at the intersection of travel, content and commerce, providing the underlying infrastructure that converts engagement into revenue for creators, publishers and live-experience companies. Fueled by AI decisioning, the product continuously optimizes link placement and partner routing to maximize conversion. With fresh capital, Stay22 plans to broaden its vertical coverage into food, fashion, DIY, lifestyle and consumer technology, deepen global supplier relationships and continue hiring across product, engineering and partner support as it scales.

Team

  • Roe Stamps

    Co-Founder and Managing Director

    LinkedIn
  • Michael A. Medici

    Managing Director

    LinkedIn
  • Robert M. Hassell

    Managing Director

    LinkedIn
  • Raymond V. Sozzi

    Executive-in-Residence

    LinkedIn