Investor profile
Positive Sum
VC
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Positive Sum is an early-stage venture capital firm that backs founders pursuing their life's work, providing patient, long-term capital and deep operational support. The firm invests especially from Seed to Series B in companies that are creating and reinventing categories, focusing on unique products in large markets that demonstrate high-frequency, repeatable customer traction and aim for compounding growth over decades. Positive Sum's mission is to capture and openly share the world's best knowledge on building great businesses. By 'learning in public,' the firm cultivates a network of founders, operators, and investors, and leverages its sister company Colossus to help portfolio founders tell their stories and connect with the right audiences. The firm's name reflects its core philosophy: creating positive-sum outcomes where companies, customers, and investors all benefit together.
Notable quotes
“We're trying to do that same thing with Positive Sum, the venture firm that I run and started with my partner Sam Cates back in the summer of 2020. We're gonna open up... Whenever I feel like I found something really proprietary, like I could ride this idea for a long time by myself, that's the one I know I should really give away.”
“Positive Sum is an early-stage venture capital firm led by co-founders Patrick O'Shaughnessy and Sam Cates. Positive Sum invests across stages, especially from Seed to Series B, in companies that are creating and reinventing categories.”
“Our mission is to capture and openly share the world's best knowledge on building great businesses. By 'learning in public', we intend to cultivate the world's smartest and most interested audience and network, and to use what we learn to benefit our portfolio companies and their visions for the future.”
Team
Recent investments
| Company | Round | Size | Date |
|---|---|---|---|
| Cognition | Series D | $1.0b | 2026-05-27 |
| Rogo | Series B | $160m | 2025-04-29 |
| Etched | Series A | $120m | 2024-06-25 |
| Physical Intelligence | Seed | $70m | 2024-03-01 |
| Tegus | Series Unknown | $20m | 2022-09-28 |
| Passthrough | Series A | $10m | 2023-02-01 |
| Blues | Series A | — | 2023-01-05 |
| Prefect | Seed | — | — |
| Vanta | Seed | — | — |
| Entrepreneurs First | Series C | $160m | 2022-06-01 |
Frequent co-investors
| VC firm | Deals together |
|---|---|
| Thrive Capital | 4 |
| Lux Capital | 3 |
| Khosla Ventures | 3 |
| Greylock | 2 |
| Primary Venture Partners | 2 |
| Founders Fund | 2 |
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