1. Recent Funding
2. Investors
3. Castle Island Ventures

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Castle Island Ventures

Castle Island Ventures has backed 3 companies on Recent Funding, 3 in the last 12 months; its most recent deal is Birdai (2026-07-28).

What Castle Island Ventures invests in

• Trading tools and bots · 1
• Health and bio · 1

Portfolio

Company	Round with Castle Island Ventures	Total raised	Latest raise
BBirdai Trading tools and bots	2026-07-28 seed · $4M	$4M	2026-07-28 seed
VValinor Health and bio	2026-03-31 seed · $25M	$25M	2026-03-31 seed
BBirch Hill	2026-02-11 pre seed · $2.5M	$2.5M	2026-02-11 pre seed

Most frequent co-investors

• TThe Venture Dept2 shared rounds
• MMaven 11 Capital1 shared round
• NNeoclassic Capital1 shared round
• MMetalayer Ventures1 shared round
• PPaxos1 shared round
• PPolaris1 shared round
• NNascent1 shared round
• FFalconX1 shared round
• 557Blocks1 shared round
• TThe Fintech Fund1 shared round
• PPaul Prager1 shared round
• NNazar Khan1 shared round

Portfolio companies are the companies on Recent Funding with a round that lists Castle Island Ventures, which is a subset of its real portfolio. API: /api/v1/investors/castle-island-ventures. All investors.