JG

John Geis

Principal at Cresset Partners

📍 DuPage County, Illinois, United States🔄 Updated October 2026💼 5 investments📅 7 years investing🗓 Last invested Sep 2021
VC🌍 United States
5
Total investments
0
Early stage
0
Mid stage
2
Late stage
7y
Years active

Portfolio

4 investments · sorted by recency
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Investor
Jun 2021
Greenbrook is the nation’s leading provider of outpatient depression treatment. We offer transcranial magnetic stimulation (TMS) therapy and nasal esketamine. We partner with you to provide your patients with a comprehensive treatment experience, including handling insurance coverage and managing logistics, all while keeping you informed and part of the process. To refer your patient for a no cost consultation, explore CME/CEU opportunities, or learn more about depression treatment at Greenbrook: visit www.greenbrookproviders.com
Investor
Jan 2021
Senseonics, Inc. is a medical device startup company in Germantown, Maryland, USA (near Washington, DC) developing transformative glucose monitoring products that are intended to enable people with diabetes to confidently live their lives with ease. Utilizing breakthrough fluorescence sensing technology, the Senseonics continuous glucose monitoring ("CGM"​) system is being designed to be the first fully implantable CGM that is highly accurate and stable throughout its long sensor life. The system consists of a very small sensor implanted under the skin, an external transmitter, and a mobile medical application, which allows for discreet, easy access to real-time glucose measurements without the need for a dedicated receiver.
Investor
Feb 2020
Kinnos is a New York-based company that is pioneering color technology to revolutionize how we use disinfectants. Our flagship product, Highlight, is a patented and award-winning technology used by first responders, healthcare systems, and transit agencies to radically improve disinfection technique and quality.
Investor
Mar 2019
A trusted partner to personal injury attorneys and medical providers, PROVE helps patients get the medical care they need and deserve. PROVE offers its partners seamless case management and remarkable customer service through its proprietary portal and comprehensive network of reputable, PROVE certified providers. PROVE’s medical lien funding solutions are flexible, quick, reliable and transparent. For medical providers, PROVE generates high-quality referral volume, as well as medical lien servicing and medical financing solutions for third-party liability claims. For attorneys and legal teams, PROVE offers treatment management technology and services that improve operational efficiency and drive better case outcomes. For more information on our services or partnering with us, please e-mail us at info@provepartners.com or call us now. You can find our open positions https://provepartners.com/about-us/careers/
Experience · 9 entries
All (9)
Investments (5)
Board (1)
2026
Partner
Apr 2026
Huxley delivers IC-ready deliverables—in the firm’s own format and voice—that investment teams at Private Equity and Family Offices actually need. As long-time investors ourselves, we were disappointed by LLMs, including Claude Cowork, so we built the house we wanted to live in. Get in touch and let us show you what great looks like.
2021
Board Member
Sep 2021
Chicago Children’s Museum is a place where families and caregivers with infants and children are encouraged to create, explore, and discover together through play. The museum features three vibrant floors of exhibits and activities that provide sensory experiences and engaging educational content focusing on literacy, science, math, visual and performing arts, and health.
Investor
Jun 2021
Greenbrook is the nation’s leading provider of outpatient depression treatment. We offer transcranial magnetic stimulation (TMS) therapy and nasal esketamine. We partner with you to provide your patients with a comprehensive treatment experience, including handling insurance coverage and managing logistics, all while keeping you informed and part of the process. To refer your patient for a no cost consultation, explore CME/CEU opportunities, or learn more about depression treatment at Greenbrook: visit www.greenbrookproviders.com
Investor
Jan 2021
Senseonics, Inc. is a medical device startup company in Germantown, Maryland, USA (near Washington, DC) developing transformative glucose monitoring products that are intended to enable people with diabetes to confidently live their lives with ease. Utilizing breakthrough fluorescence sensing technology, the Senseonics continuous glucose monitoring ("CGM"​) system is being designed to be the first fully implantable CGM that is highly accurate and stable throughout its long sensor life. The system consists of a very small sensor implanted under the skin, an external transmitter, and a mobile medical application, which allows for discreet, easy access to real-time glucose measurements without the need for a dedicated receiver.
2020
Investor
Feb 2020
Kinnos is a New York-based company that is pioneering color technology to revolutionize how we use disinfectants. Our flagship product, Highlight, is a patented and award-winning technology used by first responders, healthcare systems, and transit agencies to radically improve disinfection technique and quality.
Show all 9 entries ↓
Investment activity
2019–2021 · 5 investments
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