GFS vs TSEM: Which Is the Better Buy in 2026?
Last updated August 2026
Short answer
GFS and TSEM are similarly sized, but GFS trades noticeably cheaper on forward earnings (19.85x vs 37.73x): the market is paying up for TSEM's profile and pricing GFS more conservatively, or for faster growth. Which you prefer comes down to the drivers you believe, and whether adding either over-concentrates what you already own.
GFS vs TSEM: the tie-breaker metrics
Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.
| Metric | GFS | TSEM | What it tells you |
|---|---|---|---|
| Market cap | $27.43B | $24.83B | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | 19.85 | 37.73 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Trailing P/E | 35.96 | 102.17 | Valuation on the last 12 months. A big drop from trailing to forward means the market expects earnings to jump, so more growth is already in the price. |
| Beta | 1.76 | 0.87 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 30% of range | 63% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 2.34 | 8.31 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Reading it: GFS is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.
Before you buy: how GFS and TSEM affect your concentration
The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. GFS and TSEM share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.
This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined GFS and TSEM exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.
What does GlobalFoundries (GFS) do?
GlobalFoundries is one of the world's largest pure-play semiconductor foundries, meaning it manufactures chips designed by other companies rather than selling its own branded products. It made a defining strategic choice in 2018 to exit the race for leading-edge nodes (the 7nm-and-below processes where TSMC and Samsung compete) and instead focus on what the industry calls more-than-Moore: feature-rich, differentiated processes where performance comes from specialized capabilities rather than raw transistor density. Its platform pillars include FD-SOI (the 22FDX and 12FDX families for low-power RF and mixed-signal designs), RF and analog processes strengthened by its acquisition of IBM's semiconductor operations, power management, and emerging silicon photonics. End markets span automotive, IoT, smartphones, 5G and communications infrastructure, data center, and aerospace and defense.
What does Tower Semiconductor (TSEM) do?
Tower Semiconductor (Nasdaq: TSEM) is an independent semiconductor foundry headquartered in Migdal Haemek, Israel, and incorporated in 1993. Rather than chasing leading-edge digital nodes like TSMC, Tower specializes in high-value analog and mixed-signal process technologies: silicon-germanium (SiGe), RF CMOS and RF SOI, CMOS image sensors, BCD power management, and silicon photonics (SiPho). It runs a multi-fab network across Israel, the United States, and Japan and sells manufacturing capacity to fabless chip designers and IDMs serving communications, smartphones, automotive, industrial, aerospace, and medical markets. Its 2025 revenue was roughly $1.57 billion.
GFS vs TSEM: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- GFS drivers: Specialty and mature-node niche, not leading-edge; Reshoring, CHIPS Act, and defense demand.
- TSEM drivers: Silicon photonics for AI infrastructure; Specialty analog foundry positioning.
Which fits which kind of investor
A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The dominant risk is the semiconductor cycle: foundry utilization, pricing, and earnings swing with customer inventory and end-market demand, so soft quarters can follow strong ones. For TSEM, tower is a foundry exposed to the semiconductor cycle, so inventory corrections or softening end demand can hit revenue and utilization quickly.
GFS or TSEM: which should you pick?
GFS vs TSEM: the full fundamentals
GFS. Figures are approximate and tied to the asOf date; verify live numbers before acting. As a foundry, GFS trades on where semiconductor utilization sits in the cycle as much as on trailing multiples, so a given quarter's revenue and margin can understate or overstate normalized earning power. The reshoring, CHIPS Act, and automotive tailwinds are real but do not remove cyclicality.
TSEM. As of July 2026 Tower was a solidly profitable foundry, but the stock had risen roughly 480% over the prior year, pushing its trailing P/E near 115x versus a longer-run median closer to 28x. The premium reflects the market pricing in the contracted silicon-photonics ramp for 2027 and 2028 rather than current earnings alone.
Headline figures (approximate, Jul 2026): GFS shows revenue (ttm) Multiple billions annually; Q1 2026 revenue was roughly $1.6 billion, with the following quarter guided near $1.8 billion as demand recovered, end-market drivers Automotive (tracking toward ~$1.5B in 2026), communications infrastructure and data center, IoT, smart mobile devices, and aerospace and defense, margins and profitability Profitable and improving with utilization; specialty and long-lifecycle nodes support steadier margins than leading-edge logic, but results still move with the cycle, capacity and capex Capital-intensive fabs in New York, Vermont, Dresden, and Singapore; expansion partly supported by ~$1.5B CHIPS Act funding plus defense and quantum awards; TSEM shows revenue (ttm) ~$1.62B, revenue (fy2025) ~$1.57B, net income (ttm) ~$245M, market cap ~$26B.
The bottom line: GFS vs TSEM
GFS and TSEM are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined GFS and TSEM exposure against your real portfolio. It is not an investment adviser.
Wondering how GFS or TSEM fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in GlobalFoundries with AI
Connect the broker you already use and ask Walnut's AI how GFS fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between GFS and TSEM?
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GlobalFoundries is one of the world's largest pure-play semiconductor foundries, meaning it manufactures chips designed by other companies rather than selling its own branded products. Tower Semiconductor (Nasdaq: TSEM) is an independent semiconductor foundry headquartered in Migdal Haemek, Israel, and incorporated in 1993. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is GFS or TSEM the better stock?
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Neither is universally better; they suit different views and risk levels. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, GFS or TSEM?
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On forward P/E (as of August 2026), GFS trades at 19.85x and TSEM at 37.73x, so GFS is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both GFS and TSEM?
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Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of GFS vs TSEM?
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GFS: The dominant risk is the semiconductor cycle: foundry utilization, pricing, and earnings swing with customer inventory and end-market demand, so soft quarters can follow strong ones. Concentration in mature and specialty nodes is a strength but also a ceiling, and larger rivals like TSMC can redirect trailing-edge capacity toward these markets, pressuring pricing. Mubadala's roughly 77% ownership means a large controlled float and potential share overhang as it sells down. GFS is capital-intensive, so heavy fab capex and any delay in expected government funding affect free cash flow. It also faces geopolitical and trade-policy risk, customer concentration in automotive and mobile, and competition from lower-cost Asian foundries including UMC and SMIC. Its newly started dividend is small and its capital-return targets depend on cash flow that can fall in a downturn. TSEM: Tower is a foundry exposed to the semiconductor cycle, so inventory corrections or softening end demand can hit revenue and utilization quickly. Much of the current valuation rests on silicon-photonics contracts for 2027 and 2028 that are not yet delivered revenue, and concentration among a few large SiPho customers means a single program shift could materially change the trajectory. The company also carries geopolitical and operational exposure across Israel, Japan, and the United States, including the unwinding of its manufacturing arrangement at Intel's New Mexico fab (Fab 11X) and the transfer of that production to its own Fab7 in Japan. Competition in analog and RF foundry is intense, and pricing pressure or a missed technology transition (for example toward GaN or SiC) could erode margins. Finally, the stock's trailing P/E near 115x leaves little room for execution missteps.
Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell GFS or TSEM; figures are approximate and dated (as of August 2026). Verify current data before investing.