TSMC’s Arizona campus is now the company’s most profitable overseas operation, a milestone that arrived with the first half results. The US subsidiary booked NT$36.07B in profit for the period, up 663% from a year earlier, edging out the Nanjing fab, according to the foundry’s interim report covered by Taiwan’s Commercial Times and Economic Daily News.
All four major overseas units together earned NT$58.53B in the half, up 215% year over year. Arizona alone contributed more than 60% of that total.
The second quarter brought a pause in the climb. Arizona profit came to NT$17.26B, down 8.2% from the first quarter but still 308% above a year ago. Investment income from the US fab slipped 13.6% to NT$14.6B.
Costs are the counterweight. Depreciation and amortization will rise as construction of later phases accelerates, analysts cited by Commercial Times say. Chief financial officer Wendell Huang has guided that overseas plants will shave 2-3 percentage points off gross margin early on, with the drag widening to 3-4 points as they mature.
The first Arizona fab, running 4nm, reached mass production in late 2024. A second fab on 3nm starts ramping in the second half of 2027. With the latest $100B commitment, planned US investment stands at $265B across 10 fabs and two advanced packaging plants.
Nanjing still earned NT$14.98B in the half. Japan’s JASM swung to profit this year after a 2025 loss, booking NT$951M in the first quarter and NT$727M in the second, though the July Kumamoto earthquake clouds its third quarter.
