According to the firm's blog post, Walnut raised $110M in a Series A round led by Gradient Ventures with strong participation from new and existing investors including Newark Ventures, Afore Capital, 2048 Ventures, CityRock Ventures, AngelList, Weekend Fund, Company Ventures, Banana Capital, Goodwater Capital, and Muse Capital. Founders and executives from Teachable, Clearbit, and Afterpay also participated. The round is composed of $10M in equity financing and $100M in debt financing; the debt portion of the round was provided by Clear Haven Capital.

Walnut's mission is to increase access to affordable healthcare. Tthe firm provides a fintech product that helps patients afford care whenever they incur out-of-pocket costs by enabling them to spread costs over time- the best part is that there are no fees or interest to patients.