# Jeffrey Tarrant

> Jeffrey Tarrant is a seed investor in New York backing Blockchain and Bitcoin. See 3 investments, round sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Location: New York, United States
- Total investments: 3
- Last investment: Dec 2018
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/jeffrey-tarrant-382092a2/

Jeffrey Tarrant is a seed investor in New York focused on Blockchain and Bitcoin. Jeffrey is CEO and CIO of MOV37, a new business he founded to seek out and invest in emerging talent in the intersecting fields of machine learning, data science, and investment management. Jeffrey has more than three decades of experience picking emerging talent. He co-founded Protégé Partners in 2002 to focus exclusively on investing inestablished smaller hedge funds and select emerging managers. Prior to Protégé, Jeffrey managed institutional size alternative investments for private family fortunes and was a member of the board of the Investment Fund for Foundations. Jeffrey is known for investing in and seeding emerging managers, many of whom have become renowned names in the industry. During this time, Jeffrey also created Altvest, the hedge fund industry’s first Internet-based commercial database and analytics systems. Jeffrey is currently a director of ARK US, the U.S. affiliate of ARK (Absolute Return for Kids), a U.K. based charity with a mission to transform the lives of children, as well a director of WITNESS, a global human rights organization. Jeffrey’s philanthropic efforts include active support for many award-winning social issue documentary films. After graduating from Harvard Business School, Jeffrey worked at Berkeley Asset Management where he co-managed one of the first multi-managers in the US investing in hedge funds.

## Contacts

5 contacts available for Jeffrey Tarrant: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/jeffrey-tarrant?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Blockchain | 2 | 67% |
| Bitcoin | 1 | 33% |
| Privacy | 1 | 33% |
| Ethereum | 1 | 33% |
| Software | 1 | 33% |

6 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 67% |
| Series A | 1 | 33% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 2 | 67% |
| United Kingdom | 1 | 33% |

## Investments

| Company | Description | Round size | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Layer1 | Layer1 builds turnkey, fully-integrated Bitcoin mining data centers that boost the profitability of energy assets and improve the reliability of electrical grids. The company's technology enables unique value creation through the innovative integration of energy systems with high-performance computing.Layer1 was founded in 2018 and isheadquartered in San Francisco, California. | $2.1M | Seed | Dec 19, 2018 | https://www.layer1.com |
| Openwater | Openwater is developing a new generation of imaging technologies, with high resolution and low costs, enabling medical diagnoses and treatments, and a new era of fluid and affordable brain-to-computer communications | $22M | Series A | Dec 10, 2018 | https://www.openwater.cc/ |
| Aztec | Aztec develops an ethereum trading protocol that enables private transactions across the public blockchain. Its renowned research team is the force behind PLONK, the lightning-fast standard in zero-knowledge technologies. The team has brought multiple R&D breakthroughs to Layer 2 on Ethereum and has deep experience in deploying complexcryptosystems to Web3. | $2.1M | Seed | Nov 29, 2018 | https://aztec.network |

3 of 3 investments shown.

## Co-investors
- [Bold Capital Partners](https://shizune.co/investors/profile/bold-capital) — VC Fund, 1 deal together
- [A.Capital Ventures](https://shizune.co/investors/profile/capital-partners-l-p) — VC Fund, 1 deal together
- [ConsenSys](https://shizune.co/investors/profile/consensus-systems) — VC Fund, 1 deal together
- [Digital Currency Group](https://shizune.co/investors/profile/digital-currency-group) — VC Fund, 1 deal together
- [Entrepreneurs First](https://shizune.co/investors/profile/entrepreneur-first) — VC Fund, 1 deal together
- [Excel Venture Management](https://shizune.co/investors/profile/excel-venture-management) — VC Fund, 1 deal together

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## FAQ

### What does Jeffrey Tarrant invest in?

Jeffrey Tarrant invests primarily in Blockchain, Bitcoin and Privacy startups, most often at Seed and Series A stage. Most of the 3 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Jeffrey Tarrant?

Public channels for Jeffrey Tarrant include LinkedIn. 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 Jeffrey Tarrant last invest?

The most recent investment recorded for Jeffrey Tarrant closed in Dec 2018. Shizune tracks 3 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 Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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