Over the past five years Nvidia’s market capitalisation has risen from just over $500 billion to more than $5 trillion – a ten‑fold increase that mirrors the company’s pivotal role in powering AI data centres that have proliferated since the public launch of ChatGPT in late 2022.
That surge placed Nvidia ahead of Apple, whose market cap hovered just under $2.5 trillion in September 2021, making Nvidia the world’s largest publicly traded firm in 2024, according to the latest market data.
The five megacap technology giants – Nvidia, Apple, Microsoft, Amazon and Alphabet – now together account for roughly 30 % of the combined market capitalisation of the S&P 500, underscoring an unprecedented concentration at the top of the index.
Technology stocks dominate the index even more broadly, with nearly 40 % of the S&P 500’s current value tied to tech‑sector tickers, a shift that has skewed the index’s sector allocation toward digital and AI‑related businesses.
Historical context shows the top spot has shifted over the decades: two decades ago oil giant ExxonMobil led, followed by industrial heavyweight General Electric; three decades ago Coca‑Cola topped the list with a $130 billion market cap before being overtaken by ExxonMobil and later by Intel.
Analysts caution that size alone does not guarantee future performance. While the megacap firms have delivered strong fiscal results, market dynamics can change – as demonstrated when Nvidia displaced Apple as the world’s biggest public company.
Nevertheless, the continued expansion of the artificial‑intelligence industry and the persistent demand for high‑performance processing chips suggest that Nvidia and its fellow megacap peers could remain in the top tier for at least the next few years, barring unforeseen market disruptions.