PBJ Capital is an independent venture firm based in Lincoln, Massachusetts, investing $1–5 million in seed and Series A stage technology companies. Managed by Bruce Clarke, the firm focuses on early-stage investments in biotechnology, healthcare, and technology sectors.
Their most common stage is seed (48% of deals). Average disclosed round size is $12.3M (across 27 rounds with reported amounts).
Portfolio
20
Fund Size
—
Top Stage
Seed
Last 12 Mo
0
Team
JY
John Y. Campbell
Partner
BE
Bruce Eric Clarke
Managing Member
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
27 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 NvisionX | Seed | $4.6M | Jan 2025 |
 Language I/O | Seed | $5M | Jul 2024 |
 Allure Security | Series A | $10M | Apr 2024 |
 Breinify | Seed | $11M | Jan 2024 |
 Datanomix | Growth | $12M | Jan 2023 |
 Sotero | Seed | $8M | Jul 2022 |
 iRestify | Unknown | $6M | Mar 2022 |
 Zero | Series A | $12M | Mar 2022 |
| Allure Security | Seed | $6.8M | Feb 2022 |
 NVISIONx | Seed | $4.6M | Jan 2022 |
| NvisionX | Seed | $4.6M | Jan 2022 |
| LLanguage IO | Series A | $6.5M | Jan 2022 |
| AaPriori | Series D | $30M | Sep 2021 |
 Armored Things | Series A | $12M | Aug 2021 |
 Native Voice | Seed | $14M | Jul 2021 |
| IInSpace Proximity | Seed | $6M | Jun 2021 |
| Breinify | Seed | $11M | May 2021 |
| MMemoryWell | Seed | $2.5M | Mar 2021 |
 Symbl.ai | Series A | $17M | Jan 2021 |
| AaPriori Technologies | Series D | $30M | Jan 2021 |
| Breinify | Unknown | $11M | Jan 2021 |
 Symbl | Series A | $17M | Jan 2021 |
| LLanguage IO | Seed | $500K | Jan 2020 |
| AaPriori Technologies | Series C | $26.8M | Jan 2019 |
| AaPriori | Series C | $26.8M | Jan 2019 |
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Top Co-Investors
Gutbrain Ventures22 shared
Omega Funds5 shared
Joint Effects4 shared
Streamlined Ventures4 shared
Glasswing Ventures3 shared
Amino Capital3 shared
Companyon Ventures3 shared
CreativeCo Capital3 shared
SixThirty Ventures3 shared
Morgan Stanley Next Level Fund3 shared
NewSpring3 shared
Sigma Prime Ventures3 shared
Techstars2 shared
Zetta Venture Partners2 shared
Portage Ventures2 shared
Greycroft2 shared
Sterling Road2 shared
Boston Seed Capital2 shared
Gaingels2 shared
Service Provider Capital2 shared
Last updated: 7 October 2026