TSMC: The Most Important Company You Don't Own

One Factory Runs the World

Taiwan Semiconductor Manufacturing Company makes chips for Apple, NVIDIA, AMD, Qualcomm, and Broadcom. It fabricatesManufactures chips in specialized factories called fabs. TSMC builds other companies' designs into silicon. the processors inside every iPhone, every data center GPU training an AI model, and every advanced chip in the US military's supply chain.

TSMC's share of the global advanced chip market is not a plurality. It is near-total dominance.

Every NVIDIA H100 and B200 is manufactured by TSMC. Every Apple M-series chip. Every AMD EPYC server processor. These companies design their chips. TSMC builds them. Without TSMC, the designs are blueprints with no factory.

The AI boom is a TSMC boom. Revenue hit $122 billion in 2025, up 36% year over year, and Q1 2026 came in 41% above the prior year. Advanced packaging capacity for AI chips is sold out through 2026, and TSMC's HPC platform now drives 61% of total revenue. Every hyperscaler is competing for allocation on TSMC's production lines.

Who Cannot Function Without TSMC

Even the companies building custom AI chips to escape NVIDIA's pricing power depend on TSMC to manufacture those chips. Google's TPUs, Amazon's Trainium, Microsoft's Maia: all TSMC customers. The escape route from the NVIDIA tax runs straight through Hsinchu, Taiwan.

100 Miles From the Chinese Mainland

TSMC's most advanced fabs are in Hsinchu and Tainan, Taiwan. The Taiwan Strait is 100 miles wide. China considers Taiwan a breakaway province and has not ruled out reunification by force. The US has committed to defend Taiwan but has not said what that defense looks like.

A Chinese blockade or invasion of Taiwan would shut down TSMC's production. This would affect not just AI but the entire global technology supply chain. Smartphones, cars, medical devices, military hardware.

These are not hypothetical numbers. Multiple think tanks and financial institutions have modeled Taiwan disruption scenarios. Bloomberg Economics' 2026 update puts a full-conflict scenario at roughly $10.6 trillion of first-year global GDP impact, about 9.6% of world output. A blockade short of war still costs more than 5% of global GDP in year one. The semiconductor sector takes the hardest immediate hit in either case.

The risk is not binary. It exists on a spectrum. A full invasion is the extreme case. More likely scenarios include increased military pressure, trade restrictions, or a partial blockade. Each of these degrades TSMC's ability to operate at full capacity and ship to global customers.

Can the World Reduce Its TSMC Dependency?

The honest timeline: meaningful geographic diversification of advanced chip manufacturing is a late-decade story. Through 2028, TSMC's Taiwan fabs remain the irreplaceable center of the AI supply chain.

Should You Own TSMC?

TSMC trades at about 27x forward earnings. For a company that grew revenue 36% in 2025, runs ~50% net margins, and holds a near-monopoly on the most important technology input of the decade, that multiple is not obviously expensive. The reason it isn't priced higher is Taiwan.

Here is the way I think about it. TSMC is a toll road on the AI economy with a geopolitical time bomb underneath it. The toll road is the best in the world. The time bomb may never go off. But if it does, there is no airbag.

A 5-8% portfolio allocation lets you participate in TSMC's growth without making your retirement dependent on the Taiwan Strait staying calm. Position sizing is the entire game here.