§ 01 / TEAM
Blending Quantitative Investing with Purposeful Philanthropy
クオンツ投資と目的ある慈善活動の融合
A boutique firm experience — financial expertise paired with an intense humanity for improving the lives of others.
§ 02 / FOUNDER
Kevin O'Neill Stoll
FounderKevin Stoll, hailing from Alpharetta, Georgia, USA, brings over 20 years of expertise in advising Subscription Economy companies on growth strategies. A data enthusiast with a deep interest in financial markets and Japanese culture, he combines diverse perspectives to drive impactful results.
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- 01
Tokyo & Atlanta
Based between Minato-ku, Tokyo, and the greater Atlanta area.
- 02
20+ years advisory
Growth strategy for Subscription Economy companies.
- 03
Data & Japanese culture
A data enthusiast with deep interest in financial markets and Japanese culture.

§ 03 / MISSION
Alpha in service of purpose.
Deerfield Green is a private quantitative investment firm based in Minato-ku, Tokyo, Japan. Our mission is twofold: seeking alpha across global markets and channeling the yields from our portfolio into philanthropic endeavors that make a positive impact on society. We firmly believe that capitalistic endeavors can be blended with a deep sense of purpose to empower and improve the lives of others.
- 01
Quantitative investment thesis
We apply data-driven models and rigorous analysis to identify and capture alpha in global markets, ensuring the sustainability and growth of our philanthropic initiatives.
- 02
Japanese culture and arts
We invest in initiatives that promote Japanese cultural preservation, nurture artistic talent, and provide platforms for cultural expression.
- 03
Opportunity for those in need
Educational programs, vocational training, and entrepreneurship initiatives that empower individuals to unlock their potential and build sustainable futures.
- 04
Mental health growth
Counseling, therapy, awareness campaigns, and research that prioritize holistic well-being and resilience.
- 05
A boutique firm experience
While driven by quantitative strategies, we offer a boutique experience characterized by an intense humanity for improving the lives of others.
§ 04 / CONTACT
Start a conversation.
お話ししましょう。
Reach out — whether about investment, philanthropy, or a shared curiosity.