# John Burke

> John Burke is a Series B investor at PROOF (Great Falls) backing Retail and Sensor. See 5 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [PROOF](https://shizune.co/investors/profile/new-atlantic-ventures)
- Location: Great Falls, United States
- Total investments: 5
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/johnburke
- X (Twitter): https://twitter.com/andemca
- Facebook: https://www.facebook.com/jfburke

John Burke is a Series B investor at PROOF in Great Falls focused on Retail and Sensor. John Burke is the Co-Founder and Managing Partner at PROOF.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Retail | 1 | 20% |
| Sensor | 1 | 20% |
| Fitness | 1 | 20% |
| Medical | 1 | 20% |
| Hardware | 1 | 20% |

12 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series B | 2 | 40% |
| Seed | 1 | 20% |
| Series A | 1 | 20% |
| Series C | 1 | 20% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| B-Stock Solutions | B-Stock Solutions helps companies increase revenue and reduce costs associated with liquidation of excess inventory. The company was founded in 2009 by the team who built the private marketplace business at eBay for brand name companies like Sam's Club, HP, Motorola, and Dell. | $7M | Series B | Aug 13, 2014 |  |
| Valencell | Valencell produces the most accurate wearable biometric sensor systems in the world – making them the leaders in biometric technologies and design. Valencell develops performance biometric sensor technology and provides this patent-protected technology to consumer electronics manufacturers, wearables and hearables developers, medical device makers,and sports and fitness brands for integration into their products. Valencell’s technology can be used in wearables and hearables for virtually anyone, anywhere, doing anything. Their technology is scalable to multiple form-factors such as earbuds, smartwatches, armbands and wrist devices. Valencell’s technology has been used in devices from HUAWEI, Sony, LG, Bose, Jabra, Suunto, Scosche, and many more. | $7M | Series C | Jun 16, 2014 |  |
| Valencell | Valencell produces the most accurate wearable biometric sensor systems in the world – making them the leaders in biometric technologies and design. Valencell develops performance biometric sensor technology and provides this patent-protected technology to consumer electronics manufacturers, wearables and hearables developers, medical device makers,and sports and fitness brands for integration into their products. Valencell’s technology can be used in wearables and hearables for virtually anyone, anywhere, doing anything. Their technology is scalable to multiple form-factors such as earbuds, smartwatches, armbands and wrist devices. Valencell’s technology has been used in devices from HUAWEI, Sony, LG, Bose, Jabra, Suunto, Scosche, and many more. | $5.5M | Series B | Jun 20, 2011 |  |
| Valencell | Valencell produces the most accurate wearable biometric sensor systems in the world – making them the leaders in biometric technologies and design. Valencell develops performance biometric sensor technology and provides this patent-protected technology to consumer electronics manufacturers, wearables and hearables developers, medical device makers,and sports and fitness brands for integration into their products. Valencell’s technology can be used in wearables and hearables for virtually anyone, anywhere, doing anything. Their technology is scalable to multiple form-factors such as earbuds, smartwatches, armbands and wrist devices. Valencell’s technology has been used in devices from HUAWEI, Sony, LG, Bose, Jabra, Suunto, Scosche, and many more. | $1M | Series A | Jan 01, 2010 |  |
| B-Stock Solutions | B-Stock Solutions helps companies increase revenue and reduce costs associated with liquidation of excess inventory. The company was founded in 2009 by the team who built the private marketplace business at eBay for brand name companies like Sam's Club, HP, Motorola, and Dell. | $1.2M | Seed | Feb 01, 2009 |  |

5 of 5 investments shown.

## Co-investors
- [Best Buy Capital](https://shizune.co/investors/profile/best-buy-capital) — VC Fund, 2 deals together
- [Harrison Metal](https://shizune.co/investors/profile/harrison-metal-capital) — VC Fund, 2 deals together
- [TDF Ventures](https://shizune.co/investors/profile/tdf-ventures) — VC Fund, 2 deals together
- [CBC Partners](https://shizune.co/investors/profile/cbc-partners) — VC Fund, 1 deal together
- [Susquehanna Growth Equity](https://shizune.co/investors/profile/susquehanna-growth-equity) — VC Fund, 1 deal together

## About PROOF

VC Fund · Reston, United States

PROOF invests in breakout high-performing companies in growth rounds across all VC sectors except life sciences. The firm works in partnership with early stage VCs and leverages their pro-rata rights in exchange for sharing part of the upside.

5 contacts available at PROOF.

| Name | Title | Profile |
| --- | --- | --- |
| Jennifer Schretter | General Partner | https://shizune.co/investors/profile/jennifer-schretter |
| John Backus | Co-Founder and Managing Partner | https://shizune.co/investors/profile/john-backus |
| Thanasis Delistathis | Co-Founder & Managing Partner | https://shizune.co/investors/profile/thanasis-delistathis |
| John Burke | Co-Founder & Managing Partner | https://shizune.co/investors/profile/john-burke |
| Scott McComb Johnson | Managing Director | https://shizune.co/investors/profile/scott-m-johnson |

## 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 John Burke invest in?

John Burke invests primarily in Retail, Sensor and Fitness startups, most often at Series B and Seed stage. Most of the 5 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### 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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