
Longworth Venture Partners
Waltham, Massachusetts, United StatesFounded 1999
Longworth Venture Partners focuses on early-stage technology and digital media companies, particularly within the information technology and SaaS sectors. The firm provides capital, mentorship, and strategic resources, typically investing in Series A or Series B rounds with individual investments generally ranging from $3 million to $10 million.
40% of their portfolio is in E-Commerce & Marketplace. Their most common stage is seed (40% of deals). Average disclosed round size is $3.1M (across 5 rounds with reported amounts).
Portfolio
5
Fund Size
—
Top Stage
Seed
Last 12 Mo
0
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
5 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| Series B | $10M | Feb 2013 | |
| Unknown | $1.3M | Jun 2012 | |
| PPowerInbox | Seed | $800K | Oct 2011 |
| MMarginize | Pre-Seed | $650K | Aug 2010 |
| AAlignable | Seed | $3M | — |
Top Co-Investors
Atlas Venture3 shared
CrunchFund2 shared
Polaris Venture Partners1 shared
DFJ Growth1 shared
Thrive Capital1 shared
SV Angel1 shared
Morado Ventures1 shared
500 Startups1 shared
Seraph Group1 shared
Zelkova Ventures1 shared
NextView Ventures1 shared
Boston Seed Capital1 shared
Correlation Ventures1 shared
Founder Collective1 shared
Last updated: 10 April 2026