# C3

> C3 is a VC fund backing Energy, Battery and Military. See 3 investments, check sizes, portfolio. Updated Aug 2026.

- Type: VC Fund
- Total investments: 3
- Last investment: Jun 2022
- Lead investor: 0%
- Last updated: Aug 2026

C3 is a VC fund focused on Energy and Battery. C3 is investing in early-stage climate-impact startups.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Energy | 1 | 33% |
| Battery | 1 | 33% |
| Military | 1 | 33% |
| Aerospace | 1 | 33% |
| Education | 1 | 33% |

15 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 | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Terra.do | Terra.do operate as an online climate school. Terra.do collaborate with experts from the field to offer learners an overview of the entire climate landscape. The company was founded in 2020 and is based in Stanford, California, United States. | $5M | Seed | Jun 13, 2022 |  |
| Unicorn Biotechnologies | Unicorn Biotechnologies has built the turing machine for biology that read and writes scientific endeavour in iterative loops automatically by combining state of the art hardware, software and machine learning approaches. | $3.2M | Seed | Apr 21, 2022 |  |
| ION Storage Systems | Ion Storage Systems is focused on developing the most energy dense, safest batteries that can be deployed in any environment. Breakthroughs in solid state battery technology have led to a battery that meets the mission critical needs for the defense and aerospace industries; and safer more efficient for consumer electronics and electric vehicles. | $30M | Series A | Jan 09, 2022 |  |

3 of 3 investments shown.

## Co-investors
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund, 2 deals together
- [SOSV](https://shizune.co/investors/profile/sosv) — VC Fund, 2 deals together
- [Acequia Capital (AceCap)](https://shizune.co/investors/profile/acequia-capital) — VC Fund, 1 deal together
- [Alsop Louie Partners](https://shizune.co/investors/profile/alsop-louie-partners) — VC Fund, 1 deal together
- [Avaana Capital](https://shizune.co/investors/profile/avaana-capital) — VC Fund, 1 deal together
- [Avesta Fund](https://shizune.co/investors/profile/avesta-fund) — VC Fund, 1 deal together

## 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 C3 invest in?

C3 invests primarily in Energy, Battery and Military 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.

### When did C3 last invest?

The most recent investment recorded for C3 closed in Jun 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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