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name54

Castle Island Ventures

Active
Ventures Capital
36
Total Investments
-
Founded
Infrastructure
+11
Category
USA, Americas
Location
Overview
Portfolio
Performance
Comparison

What is Castle Island Ventures?

Castle Island Ventures is a venture capital firm
Official links
twittertwitter.comlinkedinlinkedin.com

Categories
Infrastructure
Blockchain Service
Finance
+3
Network
Cryptocurrency
Social

Investment Geography
Total Investments:
36

Project / Region
Share
Co-investors

Recent Fund Activities
Displays the latest investment actions taken by the fund, including new capital allocations, funding rounds, and strategic acquisitions. It helps track where the fund is investing and how it supports emerging projects.
Valinor
Valinor
Seed Round
Seed Round
Mar 31, 2026
XFX
XFX
Series A
Series A
Mar 26, 2026
Cyclops
Cyclops
Strategic Round
Strategic Round
Mar 4, 2026
Birch Hill
Birch Hill
Pre-seed
Pre-seed
Feb 11, 2026
Project 11
Project 11
Series A
Series A
Jan 14, 2026
Gondor
Gondor
Pre-seed
Pre-seed
Dec 5, 2025
Arx Research
Arx Research
Seed Round
Seed Round
Nov 6, 2025
Tesser
Tesser
Seed Round
Seed Round
Oct 21, 2025
RockSolid Network
RockSolid Network
Pre-seed
Pre-seed
Sep 25, 2025
BOB (Build on Bitcoin)
BOB (Build on Bitcoin)
Strategic Round
Strategic Round
Aug 7, 2025
Recent Exits
Highlights the fund’s completed exits from investments, including partial or full sell-offs of stakes in projects. It provides insights into the fund’s realized returns, successful exits, and capital reallocation strategies.

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General Fund Metrics

Lead Investments
Valinor
XFX
Birch Hill
Project 11
Arx Research
Co-investors
Coinbase Ventures
Polychain Capital
Nascent
CMS Holdings
Mirana Ventures
Average ROI
-
Rating
54
Fullness
84%
Last Investment
Valinor
Mar 31, 2026
Top 5 Performing Investments:
BOB (Build on Bitcoin)
BOB (Build on Bitcoin)
bob
-
ROI
​​Stable
​​Stable
Infrastructure
-
ROI
Pear Protocol
Pear Protocol
DEX
-
ROI
SatLayer
SatLayer
Liquid Staking Toke…
-
ROI
Mountain Protocol USD
Mountain Protocol USD
usdm
-
ROI

Top X Followers

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X Performance

00
02505007501000

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Top Funds

Coinbase Ventures
Coinbase Ventures
Exchange
Total Investments
228
Average ROI
7.04x
Polychain Capital
Polychain Capital
Ventures Capital
Total Investments
127
Average ROI
2.16x
Nascent
Nascent
Ventures Capital
Total Investments
45
Average ROI
0.02x
CMS Holdings
CMS Holdings
Ventures Capital
Total Investments
109
Average ROI
1.69x
Mirana Ventures
Mirana Ventures
Ventures Capital
Total Investments
78
Average ROI
0.15x
Hash3
Hash3
Ventures Capital
Total Investments
11
Average ROI
-
Dragonfly Capital
Dragonfly Capital
Ventures Capital
Total Investments
80
Average ROI
1.17x
Fidelity
Fidelity
Ventures Capital
Total Investments
5
Average ROI
-

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