Jonathan Oppenheimer
Angel investor in Johannesburg
Johannesburg, Gauteng
Jonathan Oppenheimer, Angel investor in Johannesburg is an active investor based in Johannesburg, Gauteng. This profile covers what Jonathan Oppenheimer backs, at which stage, and how founders can reach out in 2026.
Mr. Jonathan Oppenheimer is the Founder & serves as Partner at Oppenheimer Partners. He is an Angel Investor. He serves as Board Member at Polar Night Energy. He is a South African businessman and philanthropist. He began his career at NM Rothschild & Sons, before moving to Anglo American and subsequently De Beers, where he held several senior management roles in Southern Africa and London for over two decades. He founded Oppenheimer Partners in 2016, with the aim of creating an investment group that will span the primary pillars and sectors of key markets over time.
- Investor type
- Angel
- Stages
- Early Stage VentureLate Stage Venture
- Invests in
- Climate & EnergyAgTech & Agriculture
- Location
- Johannesburg, Gauteng
- Typical check
- $3.8M
- Past investments
- 3
Notable investments
How to reach Jonathan Oppenheimer
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Round Funded. "Jonathan Oppenheimer." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/jonathan-oppenheimer
Frequently Asked Questions
What does Jonathan Oppenheimer invest in?
Jonathan Oppenheimer invests in Climate & Energy and AgTech & Agriculture, typically at Early Stage Venture and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jonathan Oppenheimer invest at?
Jonathan Oppenheimer typically invests at Early Stage Venture and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Jonathan Oppenheimer's typical check size?
Jonathan Oppenheimer typically writes checks around $3.8M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.