# Arthur Madrid

> Arthur Madrid is a seed investor at The Sandbox (San Francisco) backing Gaming and SaaS. See 3 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [The Sandbox](https://shizune.co/investors/profile/the-sandbox-f24f)
- Location: San Francisco, United States
- Total investments: 3
- Last investment: Mar 2022
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/in/arthurmadrid
- X (Twitter): http://twitter.com/arthurmadrid
- Website: https://x.com/arthurmadrid
- Facebook: http://facebook.com/arthurmadrid

Arthur Madrid is a seed investor at The Sandbox in San Francisco focused on Gaming and SaaS. Arthur Madrid is based out of San Francisco, California and serves as the Chairman of The Sandbox.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Gaming | 2 | 67% |
| SaaS | 1 | 33% |
| Ethereum | 1 | 33% |
| PC Games | 1 | 33% |
| Software | 1 | 33% |

10 industries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Revel Games | Revel Games engages in the creation of mobile gaming apps. | $4.5M | Seed | Mar 15, 2022 |  |
| Rumble League Studios | Rumble League Studio's purpose is to empower players by changing the existing quo of digital ownership. | $4.5M | Seed | Dec 14, 2021 |  |
| Producteev | Producteev is one of the leading free Task Management applications for Individuals and Teams connected to : Mac (Mac App Store), Windows Desktop, Web, iPhone, Android, IM (Gtalk, AIM, Yahoo Messenger...), EMail (send tasks to task@producteev.com), Gmail, GCal... | $180K | Seed | Jul 15, 2008 |  |

3 of 3 investments shown.

## Co-investors
- [Animoca Brands](https://shizune.co/investors/profile/animoca-brands-corporation) — VC Fund, 1 deal together
- [Creative Artists Agency](https://shizune.co/investors/profile/creative-artists-agency) — VC Fund, 1 deal together
- [Framework Ventures](https://shizune.co/investors/profile/framework-ventures) — VC Fund, 1 deal together
- [Garena](https://shizune.co/investors/profile/garena-fe35) — VC Fund, 1 deal together
- [IDEO CoLab Ventures](https://shizune.co/investors/profile/ideo-colab) — VC Fund, 1 deal together
- [JDS Sports](https://shizune.co/investors/profile/jds-sports) — VC Fund, 1 deal together

## About The Sandbox

VC Fund · San Francisco, United States

The Sandbox is a decentralized, community-driven platform, where creators can make voxel assets and gaming experiences and monetize them on the blockchain. It features 3 main components: an NFT builder, a Marketplace, and Game Maker.

3 contacts available at The Sandbox.

| Name | Title | Profile |
| --- | --- | --- |
| Lucas Shrewsbury | Chief Technology Officer | https://shizune.co/investors/profile/lucas-shrewsbury |
| Marcelo Santurio | CFO | https://shizune.co/investors/profile/marcelo-santurio |
| Arthur Madrid | CEO | https://shizune.co/investors/profile/arthur-madrid |

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Arthur Madrid invest in?

Arthur Madrid invests primarily in Gaming, SaaS and Ethereum startups, most often at Seed 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.

### When did Arthur Madrid last invest?

The most recent investment recorded for Arthur Madrid closed in Mar 2022. 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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