VNET vs CSTM Comparison

VNET started as AsiaCloud in 1999 and moved into the data center business, opening its first self-developed data center in 2010. The firm listed (as 21Vianet) on the Nasdaq in April 2011, subsequently changing its name to VNET Group in 2021. It originally focused on providing data center services such as colocation and cloud services to retail clients in China, but added hyperscale customers in 2019 and now counts large Chinese hyperscalers such as Alibaba Cloud, Tencent Cloud, and Huawei Cloud as customers. At the end of September 2025, it had 52,288 retail cabinets, with the majority in Beijing, Shanghai, and the Greater Bay area. It also had 783 MW of wholesale capacity in service, with a further 306 MW under construction and a further 705 MW held for future development.

Constellium SE is engaged in the design and manufacture of rolled and extruded aluminium products, serving the packaging, aerospace, automotive, defence and other transportation and industry end-markets. The business is organized into three operating segments: the Packaging and Automotive Rolled Products segment which includes the production of rolled aluminium sheet products in European and North American facilities; the Aerospace and Transportation segment includes the production of rolled aluminium products and very limited volumes of extruded products in European and North American facilities; the Automotive Structures and Industry segment includes the production of extruded aluminium products and aluminium structural components.