# John S

> John S is a convertible note investor backing Manufacturing. See 10 investments, check sizes, portfolio and contact details. Updated Sep 2026.

- Type: Angel Investor
- Total investments: 10
- Last investment: Apr 2018
- Lead investor: 0%
- Last updated: Sep 2026

John S is a convertible note investor focused on Manufacturing and Transportation. John S

## Contacts

5 contacts available for John S: 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/john-s-4069?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Convertible Note | $18k–$225k |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Manufacturing | 1 | 10% |
| Transportation | 1 | 10% |
| Renewable Energy | 1 | 10% |
| Waste Management | 1 | 10% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Optimus Technologies | Optimus Technologies is a clean energy technology company based in Pittsburgh, Pennsylvania. Optimus manufactures the Vector System, an advanced fuel system technology that enables diesel engines to operate on 100% biodiesel. Emissions reductions for heavy-duty fleet applications are challenging or impossible to achieve in a cost-effective mannerthrough other means. The Vector System integrates into existing operations to facilitate a seamless transition to low-carbon fuels. | $175K | Convertible Note | Apr 24, 2018 | http://www.optimustec.com/ |
| Optimus Technologies | Optimus Technologies is a clean energy technology company based in Pittsburgh, Pennsylvania. Optimus manufactures the Vector System, an advanced fuel system technology that enables diesel engines to operate on 100% biodiesel. Emissions reductions for heavy-duty fleet applications are challenging or impossible to achieve in a cost-effective mannerthrough other means. The Vector System integrates into existing operations to facilitate a seamless transition to low-carbon fuels. | $162.5K | Convertible Note | Feb 28, 2018 | http://www.optimustec.com/ |
| Optimus Technologies | Optimus Technologies is a clean energy technology company based in Pittsburgh, Pennsylvania. Optimus manufactures the Vector System, an advanced fuel system technology that enables diesel engines to operate on 100% biodiesel. Emissions reductions for heavy-duty fleet applications are challenging or impossible to achieve in a cost-effective mannerthrough other means. The Vector System integrates into existing operations to facilitate a seamless transition to low-carbon fuels. | $18.1K | Convertible Note | Apr 04, 2017 | http://www.optimustec.com/ |
| Optimus Technologies | Optimus Technologies is a clean energy technology company based in Pittsburgh, Pennsylvania. Optimus manufactures the Vector System, an advanced fuel system technology that enables diesel engines to operate on 100% biodiesel. Emissions reductions for heavy-duty fleet applications are challenging or impossible to achieve in a cost-effective mannerthrough other means. The Vector System integrates into existing operations to facilitate a seamless transition to low-carbon fuels. | $150.5K | Convertible Note | Sep 30, 2016 | http://www.optimustec.com/ |
| Optimus Technologies | Optimus Technologies is a clean energy technology company based in Pittsburgh, Pennsylvania. Optimus manufactures the Vector System, an advanced fuel system technology that enables diesel engines to operate on 100% biodiesel. Emissions reductions for heavy-duty fleet applications are challenging or impossible to achieve in a cost-effective mannerthrough other means. The Vector System integrates into existing operations to facilitate a seamless transition to low-carbon fuels. | $225K | Convertible Note | Mar 15, 2016 | http://www.optimustec.com/ |
| Optimus Technologies | Optimus Technologies is a clean energy technology company based in Pittsburgh, Pennsylvania. Optimus manufactures the Vector System, an advanced fuel system technology that enables diesel engines to operate on 100% biodiesel. Emissions reductions for heavy-duty fleet applications are challenging or impossible to achieve in a cost-effective mannerthrough other means. The Vector System integrates into existing operations to facilitate a seamless transition to low-carbon fuels. | $150K | Convertible Note | Mar 05, 2015 | http://www.optimustec.com/ |
| Optimus Technologies | Optimus Technologies is a clean energy technology company based in Pittsburgh, Pennsylvania. Optimus manufactures the Vector System, an advanced fuel system technology that enables diesel engines to operate on 100% biodiesel. Emissions reductions for heavy-duty fleet applications are challenging or impossible to achieve in a cost-effective mannerthrough other means. The Vector System integrates into existing operations to facilitate a seamless transition to low-carbon fuels. |  | Convertible Note |  | http://www.optimustec.com/ |

7 of 10 investments shown.

## Co-investors
- [Protean Energy Advisors](https://shizune.co/investors/profile/protean-energy-advisors-llc) — VC Fund, 2 deals together
- [Innovation Works](https://shizune.co/investors/profile/innovation-works) — VC Fund, 1 deal together

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## FAQ

### What does John S invest in?

John S invests primarily in Manufacturing, Transportation and Renewable Energy startups, most often at Convertible Note stage. Most of the 10 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is John S's check size?

John S typically joins rounds of $18k–$225k at Convertible Note. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds John S participates in.

### How do I contact John S?

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 John S last invest?

The most recent investment recorded for John S closed in Apr 2018. Shizune tracks 10 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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