U.S. Fintech Affirm Secures $500 Million Through Series G Funding Round Led By GIC & Durable Capital Partners  Crowdfund Insider. : U.S. fintech Affirm announced on Thursday it secured $500 million through its Series G investment round, which was led by GIC and Durable Capital Partners LP. Other returning investors include Lightspeed Venture Partners, Wellington Management Company, Baillie Gifford, Spark Capital, Founders Fund, and Fidelity Management & Research Company LLC. As previously reported, Affirm is a point of sale credit provider that is currently working with more than 5,000 merchants, including Article, Joybird, West Elm, and Shopify.