NXP opens a sold-out fab in Singapore and chases Ambarella on the same balance sheet

The ribbon was also a queue

NXP chief executive Rafael Sotomayor opened VSMC, the $7.8 billion 300mm fab in Tampines, on 28 September: a joint venture with TSMC-backed Vanguard International Semiconductor, and NXP's largest investment since Freescale in 2015↗ ¹²³. First sample lots yielded above 99 percent; volume production starts in Q1 2027, building to 44,000 wafers a month by 2029 ¹².

Every first-phase wafer is spoken for

Those 44,000 wafers, revised down from a planned 55,000, are committed under long-term agreements, with no spot capacity left, and full utilization is now expected in 2028, a year ahead of plan ⁴⁵. Vanguard paid $2.4 billion for 60 percent of VSMC; NXP paid $1.6 billion for 40 percent of the shares and 40 percent of the output ⁴. Chairman Leuh Fang is evaluating a second plant↗ and says the AI-driven shortage will persist ²⁵.

The fab got cheaper by joining the AI buildout

Total cost was cut from $7.8 billion to $6.7 billion, and the saving came with a pivot: silicon interposers, licensed from TSMC at 30 to 40nm, ramping from Q1 2027 ⁴⁵. Interposers are the connective layer between AI processors and their memory stacks, and VSMC pitches itself as an alternative to TSMC's captive, undersupplied packaging lines ⁴. AI-related work went from a low-single-digit share of Vanguard's revenue in early 2025 to double digits in late 2026 ⁴. Built for the car, repriced by the cloud.

Customers pay first, in weeks and lead times

Fang warned that 2027 price increases will not be smaller than 2026's, and power-chip lead times have stretched from 21 to 26 weeks a year ago to 35 to 40 now↗; NXP itself has raised prices twice this year ⁴. That puts NXP on both sides of the price line: buying reserved capacity in its own foundry at JV prices while charging its own customers more, twice in one year. Vanguard is directing about 85 percent of its 2026 capex, NT$60 to 70 billion, into the fab ⁴.

Shareholders fund the second leg

The other leg is Ambarella. The Financial Times first reported the talks on 31 July↗, lifting the stock about 19 percent that day ⁷; when the talks resurfaced last week, Ambarella jumped nearly 18 percent in a session↗ while NXP fell 5 ⁶.

Ambarella was worth about $3.3 billion before the report ⁶, on quarterly revenue of $108.1 million ⁷, and unconfirmed speculation (Betaville) puts a rival suitor at $95 to $105 a share↗, three-quarters cash ⁸. The automotive franchise that supplied $7.116 billion of NXP's $12.27 billion 2025 revenue is carrying both bets ⁶.

The bets are options, not contracts

The talks may fail or another bidder may win; NXP's own shares fell when the pursuit surfaced, the market's verdict on paying up after a rumor-driven rise ⁶⁷. A second fab has no committed timeline ⁴. Bookings are company-claimed, and long-term agreements are the kind of paper a downturn tends to rewrite.

What to watch

Q1 2027, when volume wafers and interposers ramp on the same lines; then the second-plant decision and any definitive Ambarella filing, which would name the price of the second bill.