UMC–GlobalFoundries Merger Talks Signal Strategic Realignment in Global Foundry Industry

On the evening of March 31, 2025, U.S. stock markets saw a notable correction, yet shares of United Microelectronics Corporation (UMC 聯電), a major Taiwanese foundry, surged 9.16% in the form of its American Depositary Receipts (ADR). The rally followed a report by Nikkei that UMC is in merger talks with GlobalFoundries, a U.S.-based semiconductor foundry. This significant development quickly sparked heated discussion across the international semiconductor industry. However, UMC has officially denied the merger rumors, while GlobalFoundries has yet to issue any public statement.

According to the Nikkei report, the two companies are seeking to establish a larger U.S.-based entity that would expand its manufacturing operations across Asia, the United States, and Europe. The goal is to secure greater access to mature-node chips for the United States amid rising cross-strait tensions and China’s aggressive push for semiconductor self-sufficiency.

While public attention has been focused on a potential collaboration between Intel and TSMC in advanced process technologies, the question now arises: how likely is it that two leading players in mature-node manufacturing could successfully merge?

Facing China’s Mature-Node Competition: Merger as a Reluctant Necessity

In the current climate of heightened geopolitical tensions under Trump 2.0, the merger talks between UMC and GlobalFoundries are not surprising. Facing mounting competitive pressure from China’s rapidly expanding semiconductor capacity, the market widely anticipates that mature-node foundry services will become a red ocean within two to three years. At this juncture, the decision by two mid-tier foundries from the non-China bloc to join forces in an effort to scale up and solidify their market positions reflects both strategic pressure and a sense of necessity. From the perspective of supply chain security in Japan and the United States, such a merger could also be viewed as a practical step toward “de-risking.”

According to data from market research firm TrendForce, in the fourth quarter of last year, UMC and GlobalFoundries ranked fourth and fifth, respectively, in the global foundry market, with market shares of 4.7% and 4.6%.

If the two companies were to merge, their combined global foundry market share would exceed 9%, solidifying their dominance in the mature process segment. This would allow them to surpass South Korea’s Samsung, which possesses advanced process technologies, and China’s Semiconductor Manufacturing International Corporation (SMIC 中芯國際), which mainly focuses on mature nodes—positioning the merged entity as the world’s second-largest foundry, just behind Taiwan Semiconductor Manufacturing Company (TSMC 台積電).

Even if UMC and GlobalFoundries were to merge, there would still be a significant gap compared to TSMC, the global leader with over 60% market share. Nonetheless, if the two firms can successfully integrate as mid-tier players outside the China bloc and expand their economies of scale and manufacturing resources, the merger would not only enhance their bargaining power and industry positioning, but also offer greater strategic advantages in maintaining supply chain stability amid geopolitical risks.

Taking a closer look at the fundamentals of both companies: Based on the American Depositary Receipt prices listed on the U.S. stock market, UMC has a market capitalization of $18.46 billion (approximately NT$606.5956 billion). After the news broke, GlobalFoundries saw a modest share price increase of 0.054%, bringing its market capitalization to $20.4 billion (approximately NT$670.344 billion). The relatively small gap in valuation has laid a comparatively balanced capital foundation for subsequent merger negotiations.

If the merger proceeds successfully, the combined market capitalization of the two companies is expected to approach $40 billion, or approximately NT$1.3144 trillion. This would significantly boost their visibility in international capital markets and bring them closer to China’s SMIC, which has a market capitalization of $47.8 billion in Hong Kong (about HK$367.9 billion or NT$1.57008 trillion).

In addition, UMC currently trades on the Taiwan Stock Exchange with a price-to-earnings ratio (P/E ratio) of around 13 to 14. GlobalFoundries, which posted losses last year, does not have a meaningful P/E ratio. By comparison, SMIC is trading in Hong Kong at a P/E ratio of 98 based on 2024 earnings, or 49 based on projected profits — significantly higher than UMC. If the merger between UMC and GlobalFoundries is completed, their expanding market share and rising investor confidence could drive up their P/E ratio, enhancing their overall capital market strength and positioning them to better compete with SMIC.

From a historical perspective, UMC is one of Taiwan’s earliest dedicated foundries and was once regarded alongside TSMC as one of the industry’s dual leaders. Although over the past 20 years UMC has gradually fallen behind TSMC in both technology and market share, it has maintained a solid position in the global foundry sector as a long-standing player in the mature process segment.

Despite the growing gap with TSMC, UMC has continued to deliver solid financial performance in the mature process sector. Over the past two decades, the company has been profitable in nearly every year, with the sole exception during the global financial crisis in 2008. In the foundry industry, UMC is regarded as a consistently strong performer in the mature node segment.

GlobalFoundries’ Weak Operations Suggest UMC Should Lead Post-Merger Management

In comparison, GlobalFoundries has shown a less stable operational track record than UMC. Originally spun off from AMD’s manufacturing arm, the company later acquired Singapore-based Chartered Semiconductor and is now primarily backed by a Middle Eastern sovereign wealth fund. Over the years, frequent changes in its management team have resulted in inconsistent strategic direction and volatile performance, including two years of losses within the past four years.

Therefore, if the merger proceeds smoothly, the most reasonable arrangement would be for UMC to take charge of the post-merger operations and management. Given that wafer foundry is a highly technical, service-oriented industry that relies heavily on close client relationships, Taiwanese companies are widely regarded as the industry benchmark. If UMC leads the operations, it would help ensure managerial stability and better maximize shareholder value.

However, the ultimate success of any merger hinges on who secures the leadership and operational control. The allocation of management rights isn't just about internal power dynamics; it also impacts the stability and strategic direction of the integrated entity. This typically makes it the most sensitive and critical point in all major merger negotiations.

Currently, as the two parties are negotiating the merger, the issue of management control is undoubtedly the central concern for both sides. Unless one party is already prepared to exit or has the chance to secure a significant compensation package, it is unlikely that either would willingly cede control.

Moreover, in today’s geopolitically sensitive climate, any cross-border collaboration or corporate merger may face interference or influence from governments or other powerful stakeholders. Whether the UMC–GlobalFoundries deal will encounter similar uncertainties remains to be seen. In particular, with the United States once again under the leadership of the Trump administration, whether Donald Trump will attempt to assert control could become a critical factor in the outcome.

Still, many believe that in the coming years, China’s massive investments in mature process node capacity will lead to a brutal price war across the sector. Even if UMC and GlobalFoundries proceed with a merger, the combined entity may struggle to achieve meaningful synergies—where 1 plus 1 is greater than 2—and could ultimately fail to shift the balance of the industry.

UMC & GlobalFoundries, with Intel, Could Form a New Force Against TSMC

However, this may precisely be the key driving force behind the merger discussions. The growing challenge from China has fostered a rare consensus: only through collaboration can such threats be addressed. If UMC and GlobalFoundries succeed in their negotiations, the strategic objective may go beyond current market share or cost considerations, instead aiming for a stronger position in the global supply chain and semiconductor alliances.

In fact, I would also add my own observation here: I believe the most ideal strategic partner for GlobalFoundries would actually be Intel. Since both companies are led by American teams, they would likely benefit from greater integration efficiency in terms of management culture, language, and institutional frameworks. If GlobalFoundries chooses to work with UMC instead, even just aligning on personnel—considering differences in cultural background, language habits, and management philosophies—could require considerable time and effort, making the collaboration significantly more difficult to execute.

However, if GlobalFoundries is indeed seeking to collaborate or merge with UMC, my view is that even if the two companies manage to complete a merger and secure a foothold in the mature-node sector, their best future opportunity would still be to partner with Intel. Should the merger succeed, combining their respective customer bases and manufacturing resources—along with Intel’s advantages in advanced process technology and capacity—could create a cross-generational manufacturing alliance. This would represent a potential counterforce to TSMC’s market dominance. In fact, this could become the most strategically valuable outcome of the entire merger.

In fact, UMC and Intel already have a cooperative relationship. In early 2024, Intel announced a joint development of a 12-nanometer process technology platform with UMC, with plans to produce chips at Intel’s fabs in the United States and begin mass production by 2027. This indicates that UMC and Intel already possess a certain level of strategic alignment and collaborative foundation, paving the way for deeper cooperation in the future.

As TSMC continues to dominate the global foundry market, both South Korea’s Samsung and the United States’ Intel—leaders in the advanced node segment—are actively seeking opportunities to close the technological gap with TSMC. At the same time, UMC and GlobalFoundries, which focus on mature process technologies, are also under pressure due to China’s massive capacity buildup. To stay competitive, they must find ways to diversify and reduce their reliance on the mature node segment alone.

Samsung has long operated independently and shows no clear signs of forming external alliances. In contrast, under the leadership of CEO Pat Gelsinger, Intel has aggressively advanced its IDM 2.0 strategy, aiming to integrate advanced process technologies with foundry services. Given Gelsinger’s extensive background in the semiconductor industry—having overseen hundreds of investments and partnerships—Intel is highly likely to pursue more strategic alliances in the future, making it a key potential partner for companies like UMC and GlobalFoundries.