# Allen Day

> Allen Day is a seed investor at Ion Flux backing Blockchain and Cryptocurrency. See 4 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Fund: Ion Flux
- Location: Singapore, Singapore
- Total investments: 4
- Last investment: May 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: http://sg.linkedin.com/in/allenday
- Website: https://x.com/allenday

Allen Day is a seed investor at Ion Flux in Singapore focused on Blockchain and Cryptocurrency. Allen is the Principal Data Scientist at MapR Technologies, where he leads interdisciplinary teams to deliver results in fast-paced, high-pressure environments across several industry verticals. Previously, Allen founded TinyTube Networks which provided the first mobile video discovery and transcoding proxy service, and Ion Flux which provided amedical-grade, cloud-based human genome sequencing service.Allen holds a PhD in Human Genetics from the School of Medicine at UCLA. His dissertation project was to create the largest public data warehouse for gene expression data.Key components of the project included: operationalizing code beyond the research stage; building and operating a high-performance computing cluster for scale-out; and design and implementation of a schema that supported fast matrix operations for ontology- and graph-based machine learning algorithms.Allen has contributed to a wide variety of open source projects: R (CRAN, Bioconductor), Perl (CPAN, BioPerl), FFmpeg, Cascading, Apache HBase, Apache Storm, and Apache Mahout. Overall, his unique background combines deep technical expertise in data science with a pragmatic understanding of real-world problems. He also pursues interests in linguistics and economics, and — if it hadn’t been obvious — he performs magic.

## Contacts

5 contacts available for Allen Day: 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/allen-day?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $4M–$5.2M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Blockchain | 3 | 75% |
| Cryptocurrency | 2 | 50% |
| Web3 | 1 | 25% |
| Ethereum | 1 | 25% |
| Software | 1 | 25% |

8 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 50% |
| Pre-Seed | 1 | 25% |
| Series A | 1 | 25% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Singapore | 2 | 50% |
| United States | 1 | 25% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Airstack | Airstack is the developer of an artificial intelligence-powered platform that allows for on-chain data across several projects and blockchains. The company organizes decentralized application transactions into virtual stacks of data, allowing developers to access and incorporate any web3 on-chain data and related off-chain data into their apps. | $4M | Seed | May 02, 2024 |  |
| YieldNest | YieldNest is a decentralized liquid restaking protocol that enables ETH holders to natively restake their ETH into EigenLayer, earning rewards without sacrificing liquidity, fostering trust-minimized connections between restakers and Node Operators. | $5.2M | Seed | Apr 17, 2024 |  |
| Airstack | Airstack is the developer of an artificial intelligence-powered platform that allows for on-chain data across several projects and blockchains. The company organizes decentralized application transactions into virtual stacks of data, allowing developers to access and incorporate any web3 on-chain data and related off-chain data into their apps. | $3.7M | Pre-Seed | May 17, 2023 |  |
| Nansen | Nansen is a blockchain analytics platform that enriches on-chain data with millions of wallets labels. Crypto investors use Nansen to discover opportunities, perform due diligence and defend their portfolios with its real-time dashboards and alerts. | $12M | Series A | Jun 29, 2021 |  |

4 of 4 investments shown.

## Co-investors
- [Delta Blockchain Fund](https://shizune.co/investors/profile/delta-blockchain-fund) — VC Fund, 2 deals together
- [Kyber Ventures](https://shizune.co/investors/profile/kyber-ventures) — VC Fund, 2 deals together
- [NGC Ventures](https://shizune.co/investors/profile/neo-global-capital-ngc) — VC Fund, 2 deals together
- [NGC Ventures](https://shizune.co/investors/profile/ngc-ventures-a900) — VC Fund, 2 deals together
- [Primal Capital](https://shizune.co/investors/profile/primal-capital-48b8) — VC Fund, 2 deals together
- [Superscrypt](https://shizune.co/investors/profile/superscrypt) — VC Fund, 2 deals together

## About Ion Flux

VC Fund



1 contacts available at Ion Flux.

| Name | Title | Profile |
| --- | --- | --- |
| Allen Day | CEO | https://shizune.co/investors/profile/allen-day |

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## Featured in investor lists
- [Payments Angel Investors in Singapore](https://shizune.co/investors/payments-angel-investors-singapore)

## FAQ

### What does Allen Day invest in?

Allen Day invests primarily in Blockchain, Cryptocurrency and Web3 startups, most often at Seed and Pre-Seed stage. Most of the 4 investments tracked by Shizune back companies in Singapore. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Allen Day's check size?

Allen Day typically joins rounds of $4M–$5.2M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Allen Day participates in.

### How do I contact Allen Day?

Public channels for Allen Day include LinkedIn and the website linked on this profile. 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 Allen Day last invest?

The most recent investment recorded for Allen Day closed in May 2024. Shizune tracks 4 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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