Summit Partners is a Boston, Massachusetts -based private equity investment firm that invests in a broad range of companies headquartered in North America and Europe. The firm provides growth equity, venture capital and credit investments for growth, recapitalizations and management buyouts.

The company was founded in 1984, and in addition to its Boston headquarters, has offices in Menlo Park, California ; and London, England. The firm employs more than 85 investment professionals and more than 150 employees overall.

Since inception, Summit Partners has raised more than $20 billion in capital through 18 equity and fixed income funds.


Summit Partners was founded in 1984 by Stephen Woodsum and E. Roe Stamps, who had worked together at TA Associates and before that at First Chicago Investment Corporation (the predecessor of Madison Dearborn Partners). Woodsum and Stamps were joined shortly thereafter by Greg Avis, who would open the firm's California office in 1993. In 2001, Summit Partners completed its management succession led by Bruce Evans, Walter Kortschak, Marty Mannion, Tom Roberts, and Joseph Trustey.

On July 29, 2015, Trustey (then Managing Director and Chief Operating Officer for the firm) was killed in a Milwaukee plane crash along with his daughter Anna. [20]


Summit Partners has invested in more than 400 companies globally. Summit's portfolio includes a broad range of companies headquartered in North America and Europe. The firm focuses on investments in the technology, healthcare and life sciences, and growth products and services sectors.

Some of Summit's most notable investments include:


Since its founding in 1984, Summit Partners has raised 18 equity and fixed income funds:

Fund Inception
AUM ($m)
Summit Ventures 1984 $160
Summit Ventures II 1988 $230
Summit Ventures III 1992 $280
Summit Subordinated Debt Fund 1994 $140
Summit Ventures IV 1995 $610
Summit Subordinated Debt Fund II 1997 $335
Summit Ventures V 1998 $1.12 bill
Summit Accelerator Fund 1999 $170
Summit Ventures VI 2001 $2.08 bill
Summit Subordinated Debt Fund III [20] 2004 $465
Summit Partners Private Equity Fund VII [20] 2005 $3.10 bill
Summit Partners Venture Capital Fund II 2005 $310
Summit Partners Europe Private Equity Fund [20] 2008 €1.05 bill
Summit Partners Subordinated Debt Fund IV ($840 million) [20] 2008 $840
Summit Partners Growth Equity Fund VIII 2012 $2.7 bill
Summit Partners Venture Capital Fund III 2012 $550
Summit Partners Credit Fund 2012 $520
Summit Partners Credit Fund II 2014 $1.05 bill