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The FY2025 20-F Competition section cuts both ways: UMC calls itself "one of the world's largest independent semiconductor foundries" with production capacity "currently among the largest of all semiconductor foundries in the world" and says it believes it competes favorably with competitors on each principal element of foundry competition, yet in the same section concedes that "[s]ome of our competitors have substantially greater production, financial, research and development and marketing resources than we have" and that "several new dedicated foundries have commenced operations and compete directly with us," whose entry is "likely to initiate a trend of competitive pricing and create potential overcapacity in legacy technology" that "may erode our profit margins." A real but bounded advantage, not a durable wide one.

source: sec.gov

The FY2025 10-K asserts a durable competitive position across essentially all of the revenue base: for Electrical Americas and Electrical Global it states 'Eaton has a strong competitive position in these segments and, with respect to many products, is considered among the market leaders'; it repeats that language verbatim for Aerospace ('industry-leading portfolio', 'considered among the market leaders'); and for Vehicle it states 'Eaton is considered among the market leaders in this segment.' That is a claimed leadership position in four of the five reported segments, on a base of $27.4 billion of 2025 revenue, ~97,000 employees and customers in 180 countries, from a company founded in 1911. The rating is tempered rather than lifted higher by the filing's own admissions - price is named among the principal methods of competition in the Electrical, Vehicle and eMobility segments, and the risk factors flag 'newly competitive market players' and that 'our positions may also be impacted by new entrants into our product or regional markets.'

source: sec.gov

The 20-F states plainly that "Our success depends on our ability to obtain patents, licenses and other intellectual property (IP) rights covering our production processes and activities," and reports more than 16,700 patents worldwide as of December 31, 2025, of which more than 7,490 are in the U.S., 623 domestic and foreign patents granted in 2025 alone, NT$17,725 million of R&D (7.5% of operating revenues) and 1,591 R&D professionals. The Competition section names where UMC believes it wins: it competes favorably "particularly [on] our technical competence and research and development capabilities." The proprietary specialty-process library, not scale or a network, is the cited source of the advantage.

source: sec.gov

The filing's own description of how it competes points at designed-in and qualified positions rather than IP or pure scale. In Aerospace the principal methods of competition are listed as 'total cost of ownership, product and system performance, quality, design engineering capabilities, and timely delivery' - price is conspicuously absent, and 20% of segment sales go to three large aircraft OEMs, i.e. platform-level content that is qualified in and hard to displace mid-programme. In the Electrical segments 'customer service and support' sits alongside performance and technology as a method of competition, and 22% of sales go to six large customers. Intangibles_ip is explicitly ruled out as the primary source by the company itself: 'management believes that the loss or expiration of any single intellectual property right would not in and of itself have a material effect on Eaton's consolidated financial statements or its business segments.' Scale is real but secondary - the filing notes raw materials are bought 'from many suppliers' and 'under normal circumstances, the Company has no difficulty obtaining its raw materials,' which reads as supply resilience rather than a cost advantage claim.

source: sec.gov

UMC describes a deliberate follow strategy in the 20-F: it intends "to avoid investments in technologies that do not present commercial potential for volume production" and believes "it is beneficial to defer investment in premature equipment needed to claim the earliest advanced technology and instead to purchase more advanced and less expensive versions of such equipment from vendors who design this equipment based on pre-production lessons learned from the earliest technology." The node ladder bears this out: the most advanced process in production in 2025 is Fab 12A's 0.014 micron, wafers at 14 nanometers and under rounded to 0.0% of wafer sales in each of 2023, 2024 and 2025, and the next rung — UMC's own 12nm FinFET process, which Intel replicated in 2025 "based on our electrical design rules and UMC-verified process" for manufacture at its Arizona fab — is only "expected to begin in 2027."

source: sec.gov

The filing's leadership language is plural and hedged, not exclusive: 'considered among the market leaders' for the Electrical segments (qualified further by 'with respect to many products'), 'among the market leaders' for Aerospace, and 'Eaton is considered among the market leaders' for Vehicle. Nowhere does the 10-K claim to be the single leader in any market, and it never names a competitor or cites a market-share figure. 'Among the market leaders' maps to co_leader, not clear_leader.

source: sec.gov

The 20-F claims no premium — "our current level of pricing is comparable to that of other leading foundries in each respective geometry" — and reports that 2025 average selling price declined 5.4%, driving gross margin down from 32.6% in 2024 to 29.0% in 2025 even as 12-inch-equivalent wafer shipments rose from 3,446 thousand to 3,870 thousand and average capacity utilization improved from 68.7% to 75.2%. It also notes that "[p]rices for wafers of a given level of technology generally decline over the processing technology life cycle."

source: sec.gov

The filing describes pass-through ability that is real but bounded. On input costs: 'While we strive to recoup these increased costs through our pricing, product modifications or other mediating responses, if we are unable to do so without compromising the competitive position of our products and services, our results could continue to be impacted by this trend.' On macro conditions: 'our responses to mitigate the impact of these conditions, such as potential price increases, could negatively impact our market share or relationships with distributors or customers.' On tariffs: 'potential price increases or other mitigating efforts could negatively impact market share or otherwise increase the risk of customer disputes.' Price is also listed as a principal method of competition in Electrical Americas, Electrical Global, Vehicle and eMobility - so raising price is described by the company as costing share. Aerospace is the exception, where price is not among the listed methods of competition. The filing states no gross-margin trend in Item 1 or Item 1A.

source: sec.gov

Mature- and specialty-node wafer supplier: 2025 wafer sales were 41.4% communication, 30.6% consumer and 11.6% computer, with the AI tie indirect — 2.5D silicon interposers with deep-trench capacitors shipped to major customers for HPC, cloud computing and LLM applications.

Upstream electrical infrastructure into AI compute: Eaton supplies the power path from grid to rack, and the 10-K makes that link itself - data center is the first market it names, it cites 'momentum in the data center and utility end markets,' and its 2025-26 acquisitions target hyperscale/colocation modular buildings, solid-state transformers and liquid cooling 'from the chip to the grid.' Its exposure to AI is as a supplier to AI buildout, not as an AI technology vendor; the filing's only AI discussion of its own products is a risk factor about keeping pace with AI internally and about generative-AI compliance risk, which is incidental to the thesis.

• 12-inch 28nm/22nm logic and specialty foundry Challenger · Moderate source: sec.gov
• 12-inch silicon photonics Unknown · Moderate source: sec.gov
• 2.5D silicon interposer and 3D hybrid bonding Unknown · Moderate source: sec.gov
• 8-inch and legacy-node foundry (0.11 micron and above) Challenger · Moderate source: sec.gov
• Embedded non-volatile memory platforms (eFlash, RRAM, MRAM) Unknown · Deep source: sec.gov
• Specialty mixed-signal platforms (eHV, BCD, BSI-CSI, RF-SOI) Unknown · Moderate source: sec.gov

• Aerospace Top 3 · Deep source: sec.gov
• Electrical Americas Top 3 · Moderate source: sec.gov
• Electrical Global Top 3 · Moderate source: sec.gov
• Vehicle Top 3 · Moderate source: sec.gov
• eMobility Unknown · Low source: sec.gov

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