0001647639 2026-03-10 2026-03-10 0001647639 false 8-K 2026-03-10 Upstart Holdings, Inc. DE 001-39797 46-4332431 2950 S. Delaware Street Suite 410 San Mateo CA 94403 833 212-2461 false false false false Common Stock, par value $0.0001 per share UPST NASDAQ false