# Peter Day

> Peter Day is a General Partner at super{set}, San Francisco's AI-native startup studio and venture fund, where he co-builds data and AI companies from day one. A machine learning PhD from the University of Liverpool who spent 12 years in quantitative finance before pivoting to Silicon Valley, Peter served as Chief Product and Technology Officer at Quantcast for nearly seven years, guiding the company's real-time ML platform used by marketers and publishers globally. He brings a rare combination of deep technical credibility — hands-on coding, ML research, financial engineering — and operational leadership at scale to the companies he helps found and grow at super{set}.

- **Role:** General Partner at super{set}
- **Organizations:** super{set}, Quantcast, UBS Investment Bank, d-fine Ltd, d-fine GmbH
- **Nationality:** British
- **Education:** PhD in Machine Learning, University of Liverpool
- **Known for:** Led the engineering and product organization at Quantcast through the launch of the Quantcast Platform, featuring the AI engine Ara™, Built and scaled a real-time machine learning platform used by marketers and publishers at global scale at Quantcast, Joined super{set} as General Partner after super{set} closed a $90M Fund II and exited Habu to LiveRamp for $200M

## Career timeline

- **2006-2011** — Consultant, Senior Consultant, Manager at d-fine GmbH — quantitative finance consulting
- **2011-2012** — Director at d-fine Ltd
- **2012-2016** — Executive Director at UBS Investment Bank — equity derivatives risk and pricing technology globally
- **2016** — Joined Quantcast as Director of Engineering
- **2018** — Promoted to VP Engineering at Quantcast
- **2019-2025** — Chief Technology Officer, then Chief Product and Technology Officer at Quantcast — oversaw launch of Quantcast Platform with AI engine Ara™
- **2025** — Joined super{set} as General Partner — co-building AI-native startups with capital and deep operational expertise

## Achievements

- Led the engineering and product organization at Quantcast through the launch of the Quantcast Platform, featuring the AI engine Ara™
- Built and scaled a real-time machine learning platform used by marketers and publishers at global scale at Quantcast
- Joined super{set} as General Partner after super{set} closed a $90M Fund II and exited Habu to LiveRamp for $200M
- Held Executive Director role at UBS Investment Bank overseeing equity derivatives risk and pricing technology globally
- Earned a PhD in Machine Learning from the University of Liverpool
- Career speaker at Agent Conference on AI infrastructure investing

## Latest updates

- **2025-08** — Joined super{set} as General Partner to co-build AI-native startups alongside technical founders
- **2024-03** — super{set} closed $90M Fund II (last raised at March 2024), with Peter joining the GP team
- **2025-01** — super{set} portfolio company Habu was acquired by LiveRamp for $200M
- **2026-03** — Featured in VC Uncovered deep-dive interview on founder selection, AI investing thesis, and go-to-market strategy

## Links

- Website: https://www.superset.com/peter-day
- LinkedIn: http://www.linkedin.com/in/peter-day

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Profile page: https://yespress.io/peter-day
Published by YesPress — https://yespress.io
Last updated: 2026-05-17