The round was led by Fine Structure Ventures, affiliated with the parent company of Fidelity Investments, and included new investors Helios Climate Ventures, Regeneration.VC, and Sustainable Future Ventures. Existing investors I Squared Capital, Ecosystem Integrity Fund, and Cthulhu Ventures also joined the raise.

Ambient Photonics was founded in 2019 to bring low-light energy harvesting technology to mass scale. Ambient's technology was originally developed at the Warner Babcock Institute for Green Chemistry and funded at inception by Cthulhu Ventures LLC. The company's low-light solar cells deliver ground-breaking power density at mass market price points, inspiring a new era in connected device form and function. Ambient works with leading global electronics manufacturers to deliver superior design possibilities, performance, sustainability and convenience with embedded solar cells across a range of disposable battery-powered devices.