This section examines the companies with the fifth and sixth largest IPO valuations, alongside OpenAI, which has not yet gone public. Since OpenAI remains privately held, we will reference its most recent private valuation for comparison. Based on that figure, OpenAI would currently rank fourth among the companies on our list.
The history of major IPO valuations provides valuable insight into the evolution of industries, the influence of innovation on capital markets, and the role of investor sentiment in shaping corporate success. Companies such as Industrial and Commercial Bank of China (ICBC), Alibaba Group, and OpenAI exemplify this dynamic from vastly different sectors. Each represents a landmark moment in financial and technological development, with valuations that reflected not only their individual market positions and growth prospects but also broader economic, technological, and investment trends of their respective eras. Together, they highlight how shifts in consumer behaviour, digital transformation, and technological innovation continue to redefine the value investors place on the world’s most influential organisations
6. ICBC – $139 Billion (2006)
Industrial and Commercial Bank of China (ICBC) delivered one of the most consequential IPOs in financial history when it went public in 2006 with a valuation of approximately US$139 billion. The listing symbolised China’s accelerating economic rise and the growing prominence of its state-owned financial institutions on the global stage. As the world’s largest bank by assets, ICBC’s public debut represented more than a corporate achievement, as it highlighted China’s expanding influence within the international financial system.
Investors viewed ICBC as a direct opportunity to participate in the growth of China’s rapidly developing banking sector, supported by strong government backing and an extensive domestic customer base. The bank’s consistent profitability, solid balance sheet, and expanding international presence further strengthened confidence in its long-term prospects. Nearly two decades later, ICBC continues to exhibit considerable financial strength, with sustained revenue generation and profitability reflecting its dominant position in both the Chinese and global banking industries.
5. Alibaba – $231 Billion (2014)
Alibaba Group’s 2014 IPO represented a landmark moment in the evolution of global technology markets. Priced at US$68 per share and raising approximately US$25 billion, the offering valued the company at around US$231 billion, making it the largest IPO ever completed at that time. The listing underscored the rapid rise of Chinese technology firms and the extraordinary growth of the e-commerce sector.
Alibaba had already revolutionised consumer spending habits in China through its extensive digital marketplace ecosystem, and investors recognised its potential to influence retail markets on a global scale. Strong revenue growth, substantial earnings, and impressive operating performance provided further support for its valuation. The IPO also reflected growing international demand for exposure to China’s expanding technology sector, despite concerns surrounding regulation and geopolitical risks. By listing on the New York Stock Exchange, Alibaba not only achieved a major corporate milestone but also demonstrated China’s increasing significance within global capital markets.
4. OpenAI – $852 Billion Pre-IPO Private Valuation (2026*)
Unlike OpenAI, unlike traditional IPO giants such as ICBC and Alibaba, has yet to become a publicly listed company. Nevertheless, its private-market valuation has risen at a remarkable pace, reflecting the rapid advancement of artificial intelligence and its growing impact across a wide range of industries. Recent funding rounds valued OpenAI at approximately US$157 billion, while subsequent private share transactions have reportedly pushed its valuation to as much as US$800+ billion, making it one of the most valuable private companies in the world.
These valuations place OpenAI ahead of many established public technology firms despite its pre-IPO status. Investor confidence has been driven by the company’s leadership in generative AI, the widespread adoption of ChatGPT, and strategic collaborations with major technology companies such as Microsoft. The company’s rapid rise in valuation—from around US$29 billion in 2023 to several hundred billion dollars within a few years—highlights both the immense commercial potential of advanced AI technologies and the substantial investment required to develop cutting-edge artificial intelligence systems.