Castle Island Ventures

Other · Boston, Massachusetts

Castle Island Ventures is a direct investment firm based in Cambridge, Massachusetts. 51 portfolio companies, 1 recorded round and 8 funds are on record.

AUM
$22
Portfolio companies
51
Recorded deals
1
1 in last 12M
Last investment
Feb 2026

Partners

5

Board & advisors

1

Castle Island Ventures team

6 people are on record at Castle Island Ventures: 5 partners and 1 other. Senior names include Henry Harris (Investor), Matthew Walsh (Founding Partner) and Nic Carter (Co-Founder). 3 of them have a verified direct contact on file.

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3 of these people have a direct contact on file.

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