# Mitsui & Co.

> Mitsui & Co. is a VC fund in New York backing Medical and Mineral. See 15 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: New York, United States
- Total investments: 15
- Last investment: Mar 2026
- Lead investor: 33%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/mitsui-&-co--ltd-/about/
- Website: https://www.mitsui.com/us/en/index.html

Mitsui & Co. is a VC fund in New York focused on Medical and Mineral. Mitsui & Co. (U.S.A.) works in transportation logistics by managing supply chains and insurance services. The company is involved in the trading and investment of iron and steel products. It engages in mineral and metal resources through mining, distribution, and recycling activities. Infrastructure projects are developed and managed under itsbusiness operations. The company is also active in chemicals, food, retail, and energy. Its services extend to healthcare, IT, and mobility with partnerships in automotive, machinery, and airline industries. It also conducts financial and new business activities through joint ventures, investments, and acquisitions.

## Contacts

5 contacts available for Mitsui & Co.. Shizune tracks 2 team members at Mitsui & Co.. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/mitsui-usa?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Medical | 2 | 13% |
| Mineral | 2 | 13% |
| Health Care | 2 | 13% |
| Space Travel | 2 | 13% |
| Renewable Energy | 2 | 13% |

30 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series B | 3 | 20% |
| Series C | 3 | 20% |
| Series A | 2 | 13% |
| Venture - Series Unknown | 2 | 13% |
| Seed | 1 | 7% |

7 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 9 | 60% |
| Hong Kong | 1 | 7% |
| Singapore | 1 | 7% |
| United Arab Emirates | 1 | 7% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Go Mizoguchi | General Manager | 0 | — |
| Masaji Matsuoka | General Manager, Venture Capital Business Dept. Private Equity Div. | 0 | — |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Vast | Vast designs and develops commercial space stations for long-duration human missions, including concepts that use artificial gravity. The company engineers pressurized modules, habitation systems, power and thermal control, and docking interfaces, and integrates crew transportation via partner launch providers. Programs include Haven-1 and a largermodular station architecture that supports microgravity research, in-space manufacturing, and private astronaut expeditions. VAST SPACE, LLC collaborates with SpaceX for Crew Dragon missions and works with government and industry under collaborative agreements. Capabilities span mission design, payload accommodation, and on-orbit operations to enable sustained human presence in low Earth orbit and beyond. | $300M | Series A | Mar 05, 2026 |  |
| Heirloom | Heirloom is a provider of direct air capture technology to enhance the natural process of CO2 absorption from the atmosphere. Its technology accelerates limestone's ability to capture carbon dioxide, storing it permanently underground while operating with renewable energy. | $150M | Series B | Dec 04, 2024 |  |
| ProofPilot | ProofPilot provides a clinical experience platform that streamlines clinical trial workflows across recruitment, engagement, training, study conduct, and communication. It enables sponsors to centralize patient and site journeys within a unified solution, integrating recruitment tools, protocol education modules, analytics, and compliance features.The platform supports white-label branding so that studies reflect sponsors’ identity while offering participants consistent engagement tools. It also embeds training, logistics, and monitoring capabilities to enhance protocol adherence and reduce operational complexity. |  | Series C | Jul 11, 2024 |  |
| ATLAS LITHIUM CORPORATION | Atlas Lithium is a provider of minerals essential to the transformation of the economy from fossil fuels to electrification. They also owns multiple mining concessions for gold, diamond, and industrial sand. They advancing and developing hard-rock lithium project. | $30M | Post-IPO Equity | Mar 28, 2024 |  |
| Virtus Medical Holdings | Virtus brings together congenial health professionals from a diverse array of healthcare disciplines to provide a full range of healthcare services, from wellness and prevention to treatment and rehabilitation, for people of different ages and at different stages of the health cycle. Virtus’ priority in patient-centred care coordination can be seenthrough the implementation of an integrated medical tower, a custom clinic management system and a health consultant team. |  | Venture - Series Unknown | Mar 14, 2024 |  |
| Firefly Aerospace | Firefly was created for one simple reason: provide low-cost, high-performance space launch capability for the under-served small satellite market, where secondary-payload launches are often the only option. The technologies employed in their state-of-the-art rockets provide a clear pathway for future incremental improvements in vehicle capability.Later vehicles will also have reusable elements and employ air-breathing propulsion.Small satellites are playing an increasingly significant role in space. Smaller, lighter, and cheaper satellite technologies have led to functional systems that are a fraction of the size of their predecessors. Meanwhile, constellations of small satellites are showing promise for replacing larger custom-built systems, thus providing redundancy and the ability to regularly refresh system technology. Lastly, many advanced technologies languish at middle TRL levels. Low-cost rides to space will allow these technologies to be proven and advance their collective space-flight capabilities.Firefly Aerospace was founded in 2017 and is headquartered in Cedar Park, Texas, United States. | $300M | Series C | Nov 10, 2023 |  |
| Wellesta | Wellesta specializes in market analysis, market research reports, brand development, and key accounts management services. | $83.3K | Series B | Apr 06, 2023 |  |
| Yellow Door Energy | A performance-based long-term contract which does not expose you to any technical or performance risk on your solar plant.Yellow Door Energy manages all stages of the solar plant and you pay a monthly solar bill once the solar plant starts producing electricity | $400M | Venture - Series Unknown | Oct 12, 2022 |  |
| Yellow Door Energy | A performance-based long-term contract which does not expose you to any technical or performance risk on your solar plant.Yellow Door Energy manages all stages of the solar plant and you pay a monthly solar bill once the solar plant starts producing electricity | $400M | Venture - Series Unknown | Oct 12, 2022 |  |
| Bearing AI | Bearing is at the forefront of bringing AI to the maritime shipping industry. This is a trillion dollar industry that moves 90% of the goods we interact with on a daily basis, but has traditionally lagged far behind other industries in adopting new technologies. At Bearing, we’re changing that. We’re building AI-enabled products that solve theshipping industry’s biggest pain points and we already have some of the world’s biggest shippers as our partners. | $7M | Seed | Aug 17, 2022 |  |

10 of 15 investments shown.

## Co-investors
- [Actis](https://shizune.co/investors/profile/actis) — VC Fund, 2 deals together
- AI Fund — VC Fund, 2 deals together
- [The Arab Energy Fund](https://shizune.co/investors/profile/arab-petroleum-investments-corporation) — VC Fund, 2 deals together
- [International Finance Corporation](https://shizune.co/investors/profile/international-finance-corporation) — VC Fund, 2 deals together
- [Ischyros New York](https://shizune.co/investors/profile/ischyros-new-york) — VC Fund, 2 deals together
- [Sopris Capital Associates](https://shizune.co/investors/profile/sopris-capital) — VC Fund, 2 deals together

## Similar investors

### Similar stage
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund
- [FJ Labs](https://shizune.co/investors/profile/fj-labs) — VC Fund

## FAQ

### What does Mitsui & Co. invest in?

Mitsui & Co. invests primarily in Medical, Mineral and Health Care startups, most often at Series B and Series C stage. Most of the 15 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 Mitsui & Co.?

Public channels for Mitsui & Co. 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.

### Who are the partners at Mitsui & Co.?

The team at Mitsui & Co. includes Go Mizoguchi (General Manager) and Masaji Matsuoka (General Manager, Venture Capital Business Dept. Private Equity Div.). The Team section lists each member with their title, investment count and links.

### 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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