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John Isner, Angel Investor

John Isner

Angel Investor

Greensboro, United States

John Isner is a seed investor in Greensboro focused on Tea and Food Processing. John Robert Isner is an American professional tennis player.

Total investments:
7
Last investment:
Lead investor:
14%

Last updated:

Industries John Isner invests in

TeaFood ProcessingCoffeeGamingRetail

Stages John Isner invests in

SeedSeries AFunding RoundVenture - Series Unknown

Countries John Isner invests in

United States

Round sizes

Seed $1.8M–$7M

Contacts

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Round size

Seed
$1.8M–$7M

Investment Focus

Industry

  • Tea 2 (29%)
  • Food Processing 2 (29%)
  • Coffee 1 (14%)
  • Gaming 1 (14%)
  • Retail 1 (14%)
See all 18 industries →

Stage

  • Seed 2 (29%)
  • Series A 1 (14%)
  • Funding Round 1 (14%)
  • Venture - Series Unknown 1 (14%)

Investments

CompanyDescriptionRoundLinks
Harbor Harbor
Harbor is an infant care technology company that focuses on transforming the way to take care of young children and their families. $7M / Seed / Sep 19, 2024
Harbor Harbor
Harbor is an infant care technology company that focuses on transforming the way to take care of young children and their families. $3.7M / Seed / Feb 01, 2024
Lucra Sports Lucra Sports
Lucra Sports operates as a social-first sports gaming platform that sits uniquely at the intersection of sports gaming and fantasy sports. $10.3M / Series A / Mar 30, 2022
Lucra Sports Lucra Sports
Lucra Sports operates as a social-first sports gaming platform that sits uniquely at the intersection of sports gaming and fantasy sports. Seed / Oct 18, 2021
Lucra Sports Lucra Sports
Lucra Sports operates as a social-first sports gaming platform that sits uniquely at the intersection of sports gaming and fantasy sports. $1.8M / Seed / May 04, 2021
Runa Runa
Runa provides solutions to increase conversions and maximize profits in real-time on online merchants' Websites. In 2008, more than $21 billion was spent on online marketing to drive traffic to online merchant Websites with mechanisms such as display ads, search optimization, lead generation, and affiliate marketing. However, conversion ratesof visitors to actual sales on the Website averaged only 2-3%. Over 97% of Website visitors dropped off without making a purchase. Runa allows online merchants to more than double the conversion rate of visitors. A one percentage point increase in conversions from visitors to sales among all the existing online merchants is equivalent to them spending approximately an additional $7 billion on online advertising at current efficiencies. May 02, 2016
RUNA RUNA
Runa specializes in the fields of manufacturing, distribution, and retail energy drinks. Venture - Series Unknown / May 02, 2016

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Video Games
Clean Energy
Google
Construction
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Enterprise Software
Platforms
Travel
InsurTech
Oil and Gas
Retail
Social Impact
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Payments
Photography
Email
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Marketplace
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Fitness
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Social Network
Education
Wellness
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Sports
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FAQ

What does John Isner invest in?

John Isner invests primarily in Tea, Food Processing and Coffee startups, most often at Seed and Series A stage. Most of the 7 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

What is John Isner's check size?

John Isner typically joins rounds of $1.8M–$7M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds John Isner participates in.

How do I contact John Isner?

For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

When did John Isner last invest?

The most recent investment recorded for John Isner closed in Sep 2024. Shizune tracks 7 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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