Handico 6, officially known as Hanoi Housing Development and Investment Joint Stock Company No. 6, is a publicly traded real estate development company in Vietnam. Established in 1993 (originally as a small housing repair unit in 1961), the company transitioned to a joint-stock model in 2005 and is listed on the UPCoM stock exchange. Headquartered in the Diamond Flower Tower (also known as Handico 6 Tower) in Hanoi, Handico 6 primarily focuses on real estate investment and development, including residential, commercial, and mixed-use projects.