327 Investments in 192 Companies
11 IPOs & 70 Acquisitions
Greenwich, Connecticut
Funds Raised:
Angel Investment, Finance, Venture Capital
Oak Investment Partners is a multi-stage venture capital and private equity firm.

Investor Details


Oak Investment Partners is a multi-stage venture capital and private equity firm. It is specialized in investments in buyouts, spinouts, growth equity, mid-to-late stage financings to private businesses, and PIPE investments to public companies. It generally, targets investments between $10 million and $150 million.

The firm also specializes in startup investments, emerging growth, recapitalization, industry consolidation. It invests in wireless communications, information technology, enterprise software and services, software outsourced services, broadband and consumer Internet, digital media and new media, semiconductors, financial services information technology, healthcare services, clean energy, and consumer retail and restaurants sectors.

The firm primarily invests in the United States with selected investments in Europe, Israel, India, South Korea, and China. Oak Investment Partners was founded in 1978 and is based in Greenwich, Connecticut with additional offices in Norwalk, Connecticut, Palo Alto, California, and Minneapolis, Minnesota.

Acquisitions (1)

Nov 5, 2002Unknown
DateInvested InRoundPartner(s)
Sep, 2016$30M / Venture
Aug, 2016$7M / Series A
Jul, 2016$70M / Private Equity
Apr, 2016$11M / Series A
Mar, 2016$31M / Series E
Feb, 2016$53.04M / Venture
Dec, 2015$16.2M / Series D
Aug, 2015$50M / Venture
Jul, 2015$82.1M / Series A
Jul, 2015$82M / Series A
Jun, 2015$3.5M / Series B (Lead)
Apr, 2015$50M / Series C
Apr, 2015$6M / Series A
Apr, 2015$14M / Series D and
Mar, 2015$50M / Venture
Mar, 2015$4.15M / Debt Financing
Dec, 2014$6M / Series C (Lead)
Dec, 2014$9.1M / Series B (Lead)
Dec, 2014$1.6M / Series A (Lead)
Nov, 2014$45M / Private Equity
Oct, 2014$30M / Venture
Jul, 2014$70M / Series D (Lead)
Jul, 2014$30M / Series A (Lead)
May, 2014$20M / Series C (Lead)
May, 2014$20M / Series C
Apr, 2014$40M / Private Equity
Mar, 2014$4.9M / Series D
Mar, 2014$17M / Series B
Mar, 2014$17M / Series B (Lead)
Dec, 2013$65M / Private Equity
Dec, 2013$10M / Series A
Dec, 2013$21M / Series C
Oct, 2013$40M / Series B (Lead)
Oct, 2013$16M / Series B
Sep, 2013$69.99M / Series G
Sep, 2013$22M / Venture (Lead)
Aug, 2013$5M / Series B (Lead)
Aug, 2013$10.25M / Series A (Lead)
Jul, 2013$12.5M / Debt Financing
Jul, 2013$20M / Series D (Lead)

Current Team (22)


Funds (1)

Jun 14, 2006Oak Investment Partners XII, LP$2.65B

Offices/Locations (4)

  • Office

    901 Main Avenue

    Suite 600

    Norwalk, Connecticut 06851

    United States

  • Headquarter

    Three Pickwick Plaza

    Suite 302

    Greenwich, Connecticut 06830

    United States

  • Minneapolis

    3890 Wells Fargo Center

    90 South Seventh Street

    Minneapolis, Minnesota 55402

    United States

  • Palo Alto

    525 University Avenue

    Suite 1300

    Palo Alto, California 94301

    United States

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