Arthur Hayes
CIO; CIO & Co-Founder @ Maelstrom
Hong Kong, Hong Kong
Arthur Hayes is a seed investor at Maelstrom in Hong Kong focused on Blockchain and Cryptocurrency. Arthur Hayes is based out of Hong Kong, Hong Kong Island and is the Advisor of Upexi. Arthur previously worked at BitMEX as a CEO. Arthur Hayes attended the University of Pennsylvania.
- Total investments:
- 23
- Last investment:
- Lead investor:
- 17%
Last updated:
For AI agents: llms.txt
Industries Arthur Hayes invests in
Stages Arthur Hayes invests in
Countries Arthur Hayes invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $1.7M–$9M
- Pre-Seed
- $2.2M–$3M
Investment Focus
Industry
- Blockchain 10 (43%)
- Cryptocurrency 9 (39%)
- Financial Services 5 (22%)
- FinTech 4 (17%)
- Finance 4 (17%)
Stage
- Seed 15 (65%)
- Pre-Seed 2 (9%)
- Funding Round 2 (9%)
- Series A 1 (4%)
- Series B 1 (4%)
Country
- United States 7 (30%)
- Singapore 2 (9%)
- India 1 (4%)
- Vietnam 1 (4%)
- Portugal 1 (4%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| The BIO Protocol (BIO) allows onchain scientific communities to fund, build, and co-own research and products in specific biomedical domains including lifespan, brain health, and rare disorders. BIO, founded by senior VitaDAO members, empowers worldwide communities of scientists, patients, and investors to take science into their own hands andbring solutions to life more effectively than traditional pharmaceutical companies. | $6.9M / Seed / Sep 17, 2025 | ||
| Superform is a non-custodial yield marketplace. The protocol enables access to Erc-4626 vaults using any Evmchain. | $3M / Dec 12, 2024 | ||
| Cytonic is a multi-virtual-machine blockchain. Cytonic is compatible with blockchains such as Bitcoin, Ethereum, and Solana. | $8.3M / Seed / Nov 07, 2024 | ||
| Nillion is a computer and network security company that provides node operation that signifies implications for data, security, and privacy. The company decentralized public network based on a new cryptographic primitive called Nil Message Compute (NMC). | $25M / Oct 30, 2024 | ||
| Infinit is the DeFi Abstraction Layer that removes the enormous friction associated with creating and scaling DeFi ecosystems. | $6M / Venture - Series Unknown / Sep 12, 2024 | ||
| Time.fun enables creators to tokenize and sell their time and allows creators to monetize direct interactions such as messages or calls. | $3M / Seed / Aug 29, 2024 | ||
| BSX is a trading company that offers specializes in options and perpetual futures trading. | $4M / Seed / Aug 21, 2024 | ||
| Khalani has developed the world's first decentralized solver platform, which seeks to improve the web3 user experience through a multi-chain collaborative solution network. The platform significantly decreases the cost of creating and operating solvers. | $2.5M / Seed / Aug 07, 2024 | ||
| JUICE Finance is a VC-funded DeFi application that empowers users to borrow and lend against both their Real World and Digital Assets. The company creates the middleware and infrastructure for the collateralization of fixed-income assets, enabling institutions the opportunity to enhance their yield through DeFi and on-chain lending activity in acapital-efficient and compliant manner.It was founded in 2023 by Wes Cowan and Eric Ryklin and is located in Miami, Florida. | Seed / Mar 19, 2024 | ||
| Elixir is a decentralized protocol that enables full composability for integrations by providing computationally secure, algorithmic market-making across CEXs and DEXs. | $8M / Series B / Mar 12, 2024 | ||
| See all 23 investments → | |||
Co-Investors
About Maelstrom
Managed by the family office of Arthur Hayes (co-founder, BitMEX), Maelstrom is building a long-term portfolio across Venture, Liquid, Private Equity, and Public Markets, focused on infrastructure companies and assets that will form the foundation of the next wave of trustless decentralization.We back high-conviction opportunities ranging fromearly-stage equity and token investments to private and public market positions, bringing to each cap table the experience, relationships, and resources of having built one of the industry’s first profitable unicorns from the ground up.
Maelstrom Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Akshat Vaidya
Managing Partner & Co-founder
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Arthur Hayes
CIO & Co-Founder
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Arthur Hayes
CIO; CIO & Co-Founder
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FAQ
What does Arthur Hayes invest in?
Arthur Hayes invests primarily in Blockchain, Cryptocurrency and Financial Services startups, most often at Seed and Pre-Seed stage. Most of the 23 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Arthur Hayes's check size?
Arthur Hayes typically joins rounds of $1.7M–$9M at Seed and $2.2M–$3M at Pre-Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Arthur Hayes participates in.
How do I contact Arthur Hayes?
Public channels for Arthur Hayes include LinkedIn, X (Twitter) and Facebook. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Arthur Hayes last invest?
The most recent investment recorded for Arthur Hayes closed in Sep 2025. Shizune tracks 23 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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