Industrial and Commercial Bank of China Limited is a Chinese multinational banking company, it is the largest bank in the world by total assets and the most valuable bank in the world by market capitalization as of February 2017. It is one of China's "Big Four" state-owned commercial banks (the other three being the Bank of China, Agricultural Bank of China, and China Construction Bank). It was founded as a limited company on January 1, 1984. As of June 2015, it had assets worth US$3.616 trillion. Generally considered the largest bank and public company in the world by assets; it is the first Chinese bank to achieve such a feat. It ranks number 1 in The Banker's Top 1000 World Banks ranking, and first on the Forbes Global 2000 list of the world's biggest public companies.
ICBC was simultaneously listed on both the Hong Kong Stock Exchange and Shanghai Stock Exchange on 27 October 2006. It was the world's largest IPO at that time valued at US$21.9 billion, surpassing the previous record US$18.4 billion IPO by Japan's NTT DoCoMo in 1998. In 2010, Agricultural Bank of China broke ICBC's IPO record when it raised $22.1 billion. China's largest commercial bank was also the first company to debut simultaneously on both the Hong Kong and Shanghai stock exchanges.
ICBC raised at least US$14 billion in Hong Kong (H-shares) and another US$5.1 billion in Shanghai (A-shares). Due to heavy subscriptions, the greenshoe (i.e. over-allotment) placements were exercised and ICBC's take rose to US$21.9 billion (17% of ICBC's market value before the IPO), divided in US$16 billion in Hong Kong and US$5.9 billion in Shanghai. Following the global offering, the free float of shares was 22.14% of the market capitalization.
At the end of its first day of trading, the bank's shares closed up almost 15% at HK$3.52 in Hong Kong, compared with the listing price of HK$3.07, which was set at the top of the indicative range due to the strong demand. According to Bloomberg, ICBC's market capitalisation at the end of trade based on its Hong Kong shares was US$156.3 billion, making its equity the world's fifth highest among banks, just behind JPMorgan Chase. Meanwhile, ICBC's Shanghai-listed A-shares recorded more modest gains and ended up 5.1% from the offering price of RMB 3.12.