Maelstrom is the family office of Arthur Hayes (co-founder of BitMEX), building a long-term portfolio across venture, liquid, private equity, and public markets focused on infrastructure companies and assets forming the foundation of trustless decentralization. The firm is currently targeting a $250 million private equity fund (Maelstrom Equity Fund I) to acquire mid-sized crypto service firms.
Their most common stage is seed (50% of deals). Average disclosed round size is $12.8M (across 25 rounds with reported amounts).
Portfolio
22
Fund Size
$250M
Top Stage
Seed
Last 12 Mo
1
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
26 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| NNeuramint | Seed | $5M | Jan 2026 |
 ZODL | Seed | $25M | Jan 2026 |
 Paxos Labs | Unknown | $12M | Jan 2026 |
 Paxos | Unknown | $12M | Jan 2026 |
 Hyperbeat | Seed | $5.2M | Aug 2025 |
 BIO Protocol | Unknown | $6.9M | Jan 2025 |
| AARO Network | Pre-Seed | $2.1M | Jan 2025 |
| EEthena Labs | Unknown | $14M | Jan 2025 |
| Hyperbeat | Seed | $5.2M | Jan 2025 |
 YeagerAI | Seed | $7.5M | Aug 2024 |
 GenLayer | Seed | $7.5M | Jan 2024 |
 INIT Capital | Seed | $3.1M | Jan 2024 |
 Aethir | Seed | $9M | Jul 2023 |
 Ether.fi | Unknown | $5.3M | Jan 2023 |
 MetaEngine | Seed | $4M | Jan 2022 |
| Paxos | Series C | $142M | Dec 2020 |
 Primus Labs | Unknown | $6.5M | — |
 BSX | Seed | $4M | — |
 Rated | Series A | $12.9M | — |
 Bio.xyz | Unknown | $6.9M | — |
 Gata | Seed | $4M | — |
 Mahojin | Seed | $5M | — |
| Mahojin | Series A | $5M | — |
| EElixir Protocol | Series B | $8M | — |
 Khalani Network | Seed | $2.5M | — |
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Top Co-Investors
Selini Capital4 shared
Chapter One4 shared
Coinbase Ventures4 shared
Blockchain Capital4 shared
Animoca Brands3 shared
a16z crypto3 shared
Arrington Capital3 shared
North Island Ventures3 shared
Big Brain Holdings2 shared
Mirana Ventures2 shared
Mechanism Capital2 shared
Presto Ventures2 shared
Heartcore Capital2 shared
Electric Capital2 shared
Founders Fund2 shared
Tess Ventures1 shared
Beam Ventures1 shared
Acton Capital1 shared
HashKey Capital1 shared
+ND Capital1 shared
Last updated: 7 October 2026