PersonFounderExecutive
John Sjölund
John Sjölund is the CEO and co-founder of Luna Diabetes, a San Diego medical-device company building a small overnight patch pump that automates insulin dosing for the tens of millions of people who use pens rather than pumps. A Swedish-American inventor named on 30-plus patents, he previously founded Timesulin with his brother Andreas (a co-creator of Skype), sold it to Bigfoot Biomedical in 2017, then built the Bigfoot Unity connected dosing system that Abbott acquired in 2023. In August 2025 Luna raised a $23.6M Series A led by Vensana Capital.
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