Technological change is compounding globally — and markets are slow to price it. Advances in AI and medical science are widening the gap between the companies building the future and everyone else.
Investing in leading businesses creating the future
About us
Lunar Rock Capital is a concentrated, long-term investor in leading innovative growth companies — from artificial intelligence and software to the frontiers of healthcare, aerospace, and the global economy.
- 10+
- Years investing through market cycles
- 20–30
- Highest-conviction positions in the portfolio
- 50+
- Companies actively maintained on the watch list
- 4
- Stage process, run continuously
Approach
A repeatable, disciplined process. Built for long-term outcomes.
Every idea moves through the same disciplined cycle. Deep research feeds a concentrated portfolio, held under constant re-evaluation and sized to manage risk.
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I
Fundamental research
Deep, independent underwriting of the few variables that decide the outcome.
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II
Concentrated portfolio
20–30 highest-conviction ideas, sized to the strength of the insight.
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III
Ongoing evaluation
Every holding re-underwritten continuously against real-world evidence.
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IV
Risk management
Position sizing, business quality and generally low leverage.
Where we invest
The future is
being built now.
We focus on the foundational shifts reshaping industries and creating long-term value.
Intelligence at scale — the models, the systems that serve them, and the businesses whose economics change because of them.
Who we are
Founder & Portfolio Manager
Stephen Harris
10+ years of investing and institutional buy-side experience covering innovative growth companies, with prior roles at SAIGroup / Wadhwani Family Office, Capital Group, and MayTech Global Investments.
Lunar Rock was built around the way he already invests: deep work on a small number of businesses, held with patience, and re-underwritten continuously as the evidence arrives.
Philosophy
Four beliefs shape everything we own
The modern economy concentrates value in a small number of category leaders — a dynamic we believe will persist and be amplified by the next great platform shift, artificial intelligence.
Ideas are replacing capital and labor as the scarcest factor of production. We look for scalable platforms customers genuinely love — where embedded optionality creates a better risk / reward than the market perceives.
Our theses play out over multi-year horizons. We let winners run, minimize realized gains, and accept stretches of underperformance as the cost of above-average long-term compounding.
Insights
Letters & commentary
Quarterly fund commentary begins following the fund's launch. Partners also receive monthly NAV reporting from the fund's independent administrator and year-end audited financial statements.
Request letters→Contact
Partner with us
for the long term.
To learn more about how Lunar Rock can help you with your equity investments, please contact us and begin a conversation.
Based in the New York City area