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

Fund vehicles

8 recorded
FundVintageSize
Castle Island Ventures IV Feeder, L.P.2025—
Castle Island Ventures IV, L.P.2025—
Castle Island Ventures III-A, L.P.2022—
Castle Island Ventures III, L.P.2022—
Castle Island Ventures II-A, L.P.2020—
Castle Island Ventures II, L.P.2020—
Castle Island Ventures I-A, L.P.2018—
Castle Island Ventures I, L.P.2018—

Castle Island Ventures funds

8 funds are on record for Castle Island Ventures. The most recent is Castle Island Ventures IV Feeder, L.P. (2025 vintage).

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