0001627475 2021-01-18 2021-01-18 0001627475 false 8-K 2021-01-18 UPWORK INC. DE 001-38678 46-4337682 2625 Augustine Drive, Suite 601 Santa Clara, CA 95054 650 316-7500 false false false false Common Stock, $0.0001 par value per share UPWK NASDAQ false