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Castle Island Ventures portfolio

Castle Island Ventures has 16 portfolio companies on record at Recent Funding, with 7 investments in the last 12 months.

About Castle Island Ventures

What Castle Island Ventures invests in

• Stablecoins · 3 · 19%
• Crypto payments · 3 · 19%
• Lending and credit · 2 · 13%
• Crypto security · 2 · 13%
• RWA and tokenization · 1 · 6%
• Trading tools and bots · 1 · 6%
• Health and bio · 1 · 6%
• Prediction markets · 1 · 6%

Castle Island Ventures recent investments

Company	Round	Date	Alongside
BBirch Hill	Seed · $4M	Oct 28, 2026	Nascent, ParaFi Capital, Multicoin Capital (lead)
BBirdai	Seed · $4M	Jul 28, 2026	The Venture Dept, Metalayer Ventures
CCyclops	Series A · $20M	Jul 1, 2026	Coinbase, Circle, Nava Ventures +2
VValinor	Seed	Mar 31, 2026	57Blocks, Maven 11 Capital, The Venture Dept +6
CCyclops	round · $8M	Mar 1, 2026	Shift4 Payments, F-Prime Capital
BBirch Hill	Pre-seed	Feb 11, 2026	FalconX, Naman Kapasi, David Miller +10
GGondor	Pre-seed · $2.5M	Dec 6, 2025	Prelude, Maven 11 Capital
HHata	Seed · $4.2M · lead	Oct 22, 2024	Bybit, Nic Carter (lead), Plug and Play +3

How Castle Island Ventures invests

Castle Island Ventures portfolio companies

• BBirch Hill$4MSeed · Oct 2026
• BBirdai$4MSeed · Jul 2026
• CCyclops$20MSeries A · Jul 2026
• VValinorSeed · Mar 2026
• GGondor$2.5MPre-seed · Dec 2025
• HHata$4.2MSeed · Oct 2024
• HHalborn$90MSeries A · Jul 2022
• EEvaluate.Market$4MSeed · May 2022
• EEaglebrook Advisors$20MSeries A · Jan 2022
• NNotabene$10.2MSeries A · Nov 2021
• PPintu$35MSeries A · Aug 2021
• TTally$1.5MSeed · Mar 2021
• FFlipside Crypto$7MSeed · Sep 2019
• MMeowbacker
• XXFXbacker
• GGromabacker

Company	Round with Castle Island Ventures	Total raised	Latest raise
BBirch Hill RWA and tokenization	Oct 28, 2026 Seed · $4M	$6.5M	Oct 28, 2026 Seed
BBirdai Trading tools and bots	Jul 28, 2026 Seed · $4M	$4M	Jul 28, 2026 Seed
CCyclops Stablecoins	Jul 1, 2026 Series A · $20M	$28M	Jul 1, 2026 Series A
VValinor Health and bio	Mar 31, 2026 Seed	$25M	Mar 31, 2026 Seed
GGondor Prediction markets	Dec 6, 2025 Pre-seed · $2.5M	$2.5M	Dec 6, 2025 Pre-seed
HHata	Oct 22, 2024 Seed · $4.2M · lead	$12.2M	Apr 20, 2026 Series A
HHalborn ZK and privacy	Jul 20, 2022 Series A · $90M	$90M	Jul 20, 2022 Series A
EEvaluate.Market	May 17, 2022 Seed · $4M	$4M	May 17, 2022 Seed
EEaglebrook Advisors	Jan 25, 2022 Series A · $20M · lead	$20M	Jan 25, 2022 Series A
NNotabene Stablecoins	Nov 1, 2021 Series A · $10.2M	$24.82M	Nov 12, 2024 Series B+
PPintu Wallets and accounts	Aug 9, 2021 Series A · $35M	$154M	Jun 7, 2022 Series B+
TTally Consumer and social	Mar 18, 2021 Seed · $1.5M	$9.5M	Apr 22, 2025 Series A
FFlipside Crypto Education	Sep 1, 2019 Seed · $7M	$60.4M	Apr 22, 2022 Series A
MMeow AI agents	backer	$58.6M	Oct 15, 2026 Series B+
XXFX Stablecoins	backer	$17M	Mar 26, 2026 Series A
GGroma Real estate and construction	backer	$20M	Jul 13, 2026 Series A

Most frequent co-investors

• FF-Prime Capital3 shared rounds · last Jul 1, 2026
• PParaFi Capital2 shared rounds · last Oct 28, 2026
• NNascent2 shared rounds · last Oct 28, 2026
• TThe Venture Dept2 shared rounds · last Jul 28, 2026
• MMaven 11 Capital2 shared rounds · last Mar 31, 2026
• DDigital Currency Group2 shared rounds · last Jul 20, 2022
• NNotation Capital2 shared rounds · last May 17, 2022
• GGemini Frontier Fund2 shared rounds · last Jan 25, 2022
• CCMT Digital2 shared rounds · last Nov 1, 2021
• CCoinbase Ventures2 shared rounds · last Aug 9, 2021
• IIntudo Ventures2 shared rounds · last Aug 9, 2021
• PPantera Capital2 shared rounds · last Aug 9, 2021

Similar investors

• BBlockchain Capital18 companies · 7 deals in 12 mo
• MMirana Ventures8 companies · 4 deals in 12 mo
• FFaction8 companies · 3 deals in 12 mo
• BBullish7 companies · 3 deals in 12 mo
• MMaelstrom6 companies · 3 deals in 12 mo
• BBlockchain Builders Fund5 companies · 3 deals in 12 mo

Investors whose portfolios on Recent Funding center on the same category (Stablecoins).