PwC's latest Global Top 100 by market capitalisation report shows the combined market value of the world's 100 largest companies climbed 22% in the 12 months to March 31, 2026, equal to an increase of $9.2 trillion and taking the total to a record $51.8 trillion.
This marked a step-up in momentum from the prior period, when aggregate market capitalisation grew by 7%, or $2.8 trillion. Over a five-year horizon the Top 100 have delivered sustained expansion, producing an approximate compound annual growth rate of 10%.
The report attributes the stronger year-on-year advance to a resurgence in the technology sector alongside pronounced gains in industrials and materials. While the data do not single out individual causes beyond sector performance, PwC highlights that the gains were broad-based across listed companies in the United States and supported by solid investor demand for equities.
Geography remains a defining feature of this market-cap concentration. The United States increased its share of the Global Top 100 to 75% of total market capitalisation, up from 73% a year earlier, reinforcing its position as the largest contributor. China remained the second largest contributor to the Top 100, followed by Saudi Arabia; however, market capitalisation growth in China was described as more modest when compared with the United States.
The United Kingdom experienced notable aggregate growth as well, with a 24% increase in the combined market value of its Top 100 constituents versus the prior year. Despite that rise, the UK slipped to fifth place in the country rankings. Four UK-headquartered companies feature in the Global Top 100 and are represented across financial services, healthcare, energy and materials.
PwC's report provides example company returns within the UK cohort: HSBC recorded a 39% increase, AstraZeneca rose by 33%, Shell climbed 31% and Linde added 4% over the reporting year.
Context and implications - The figures underline a period of accelerated equity market performance concentrated among the largest global companies, with particular strength in technology, industrials and materials. The strong US contribution increased concentration within the Top 100 even as other jurisdictions such as China, Saudi Arabia and the UK also contributed to the overall expansion.
Notes: All percentage changes, country rankings and dollar amounts reflect the data as presented in PwC's Global Top 100 companies by market capitalisation report for the year to March 31, 2026.