Organization · Venture Capital
Oak Investment Partners
Oak Investment Partners is a multi-stage venture capital firm based in Wilton, Connecticut, with a focus on high-growth opportunities across various sectors including Information Technology, Healthcare, and Clean Energy. The firm has invested approximately $9 billion in over 525 companies since its founding in 1978.
Overview
What Oak Investment Partners does
What Oak Investment Partners is
Oak Investment Partners is a multi-stage venture capital firm based in Wilton, Connecticut, with a focus on high-growth opportunities across various sectors including Information Technology, Healthcare, and Clean Energy. The firm has invested approximately $9 billion in over 525 companies since its founding in 1978.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Venture Capital
- Founded
- Founded in 1978
- Approximate age
- About 48 years
- Structured capabilities
- Funder
- Last reviewed
- April 26, 2026
Official channels
Find Oak Investment Partners elsewhere
Open the official website or a supported primary organization account.
Capability profile
Oak Investment Partners as a funder
Investment thesis
Oak Investment Partners focuses on investing in disruptive growth companies where market demand and technology intersect, leveraging a multi-stage approach and a large global network to support management teams in achieving exceptional growth.
Focus narrative
The firm invests in disruptive growth companies across multiple sectors, providing growth equity to mid- and late-stage private businesses and public companies through PIPE investments. Oak aims to identify significant opportunities that can disrupt markets through innovation.
Value beyond capital
Oak Investment Partners provides active strategic help to its portfolio companies, working closely with management teams and connecting them to a network of over 250 entrepreneurs, executives, engineers, industry experts, and financial contacts to accelerate growth.
Focus and fit
- Stages
- Friends and Family · Angel · Accelerator · Pre-seed · Seed · Seed+ · Series A · Series A+ · Series B · Series B+ · Series C · Series C+ · Series D · Series E · Series F · Growth Equity · Pre-IPO · Ipo
- Sectors
- Artificial IntelligenceSaaS & Cloud SoftwareFintechHealthcareBiotech & Life SciencesConsumerCommerce & RetailEnergyClimate & Sustainability
- Regions
- Global · North America
Availability
- Currently deploying
- Not published
Portfolio and track record
- Recorded portfolio count
- 100
Portfolio context
Notable portfolio companies include: NetSpend: A provider of reloadable prepaid debit cards. Castlight Health: Offers pricing information to enhance transparency in healthcare. Zayo Group: Provides data and Internet bandwidth solutions. Benefitfocus, Inc.: A cloud-based platform for managing employee benefits. Protean Electric: Develops in-wheel motors for electric vehicles. Sutherland Global Services: Offers business process and technology management services. Bleacher Report: A major sports media site delivering engaging sports content. Argus Information & Advisory Services: Provides analytics and benchmarking solutions for financial institutions. iHealth Technologies: Helps healthcare payers manage medical payment policies.
Common questions
What to know about Oak Investment Partners
Upseed classifies Oak Investment Partners under the Venture Capital organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
April 26, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.