Taiwan Semiconductor Manufacturing Company (TSM) has emerged as the top AI stock holding for at least one prominent billionaire investor, according to Insider Monkey — a signal that sophisticated money is doubling down on the company seen as the backbone of the artificial intelligence hardware boom.

The case for TSMC is rooted in its commanding market position. According to Insider Monkey, the company controls roughly 62% of the total foundry market — meaning it manufactures chips designed by other companies — and holds more than 90% of the market for advanced nodes at 7 nanometers and below. These cutting-edge manufacturing processes are precisely what's needed to build the powerful AI chips driving demand from companies like Nvidia and Apple.

In plain terms: TSMC doesn't design the famous chips you hear about — it builds them. Almost every leading AI accelerator, from Nvidia's GPUs to custom chips made by Amazon and Google, rolls off TSMC's production lines in Taiwan. That makes the company a near-unavoidable toll booth on the road to AI infrastructure.

The billionaire investor angle, highlighted by Insider Monkey and picked up by Yahoo Finance and Google News aggregators, underscores how institutional and high-net-worth money is positioning ahead of what many expect to be a sustained, multi-year buildout of AI computing capacity.

Why it matters: TSMC's dominance means that whoever wins the AI race — whether it's cloud giants, chipmakers, or startups — almost certainly has to go through one company to build the hardware that makes it possible, giving TSMC unusual pricing power and strategic leverage in a technology era defined by compute.