TSMC is paying GlobalFoundries $2 billion for AI packaging capacity that starts producing in 2028
TSMC will pay GlobalFoundries $2 billion over five years for CoWoS silicon interposers built in Malta, New York, with volume output ramping only in 2028. GFS jumped 4.06% to $50.02, within a dollar of the $51 Neutral target BNP Paribas set on Monday.
Vincent Jiang · 3 min read
GlobalFoundries+1.16% — GlobalFoundries, up 1.16 percent today signed a five-year, $2 billion manufacturing agreement with TSMC−3.27% — TSMC, down 3.27 percent today to make silicon interposers at its Malta, New York fab, the company said on October 8 1. These are the silicon boards that let GPU dies and memory share one package, feeding CoWoS, TSMC's flagship technology for high-volume AI packaging 13. GF calls Malta the first US-based interposer source in that chain, with volume production ramping in the first half of 2028 1.
GFS rose 4.06% to $50.02 on the news, a $26.80 billion market cap 2. Against a base of about $25.75 billion, the pop added roughly $1 billion of value in a day.
The foundry that quit the leading edge is now TSMC's supplier
GF canceled its 7nm program in August 2018, judging the cost unaffordable, and AMD−4.20% — AMD, down 4.20 percent today moved its 7nm chiplets to TSMC within months 4. A year later GF sued TSMC for patent infringement in the US and Germany, TSMC countersued, and that October the pair settled with a life-of-patents cross-license 4. A GaN licensing deal followed in November 2025 4.
The constraint has since moved down the chain. ASE, the world's largest packaging and testing house, lifted 2026 capex by $2 billion to about $10.5 billion in July 5, and its AI packaging lines were still sold out in August 6. The sold-out lines point to packaging, not wafers, as the likelier queue for AI chips, and on that reading TSMC just rented floor space from the foundry that quit the leading edge.
What the $2 billion does not disclose
No annual split, no per-unit price, no capacity figure and no customer names; both companies have left every commercial detail of the deal undisclosed 3. The technology is ready, at least: GF's 65PKG interposer platform is production-qualified at TRL9, the top readiness grade 3. Spread evenly, $2 billion over five years is about $400 million a year against the $6.79 billion GF booked in 2025 49.
Six years after the 7nm exit, GF's revenue still sits below its 2022 peak
Data
| Revenue | |
|---|---|
| FY2020 | $4.85B |
| FY2021 | $6.59B |
| FY2022 | $8.11B |
| FY2023 | $7.39B |
| FY2024 | $6.75B |
| FY2025 | $6.79B |
BNP Paribas cut the stock to Neutral from Outperform on Monday October 5, target $51 from $80. Analyst Karl Ackerman called the growth drivers priced in; he flagged silicon photonics guidance of $400 million to $500 million this year as resting on an unproven capacity transfer, while conceding US capacity carries a premium 7. The announcement-day pop landed 98 cents below the cut target.
One day's pop carried GFS to BNP's cut target
Data
| Value | |
|---|---|
| BNP target, before cut | $80 |
| BNP target, after cut | $51 |
| GFS price, 8 Oct | $50.02 |
What would make the pop real
The mechanics suit both sides: TSMC buys CoWoS capacity on US soil without building a fab, and GF gets demand that funds new capacity at a plant it already runs 1. The arithmetic is thinner. Roughly $1 billion of market cap was added on October 8 against about $400 million a year of revenue, at an even split, that starts only in 2028.
TSMC's own pressroom listed no announcement of the deal as of October 8 8. The tells ahead: capacity commitments and pricing attached to Malta, quarterly volume updates, and a ramp that holds to the first half of 2028. Until those numbers exist, the market is pricing 2026 news against 2028 revenue.
Deepdive
AI-generated from this story and its cited sources. Not investment advice.
