Philip O’Connor – Startup Investor Profile

Philip O’Connor is the Co-Founder and Managing Partner at Blackhorn Ventures, an early stage venture fund focusing on industrial resource management, water technology, and energy. Their investment thesis is centered around decarbonization and recycling technologies. They invest in companies building digital infrastructure for a decarbonized future in major global industrial sectors. Some of their current investments include Golioth, Isometric Technologies, Modulous, and Pangeam Inc. Blackhorn Ventures operates in the early stage of investment, with a partnership style that supports startups like Drawboard in eliminating paper from workflows and reducing costly iteration cycles and travel.

Location: San Francisco, CA

Country: United States of America

Investment Regions:

Investment Stages: pre-seed, seed

Website:

AI Reasoning: Signal (NFX) lists a recent investment: Ridepanda – Seed – Nov 2023, and Golioth – Seed – May 2023. From Nov 1, 2025, the most recent listed investment is Nov 2023, which is 24 months prior – wait recalc: most recent is Nov 2023 (24 months ago) so that would be low-active. But also data shows no investments in 2024 or 2025. Therefore last known investment was Nov 2023 (over 12 months). However Signal also shows Golioth May 2023 and others earlier. Thus classify as low-active.

Low Activity – Only known angel investments more than 12 months ago.

Active – Known angel investments between the last 12 and 6 months.

Very Active – Known angel investments in the last 6 months.