United Microelectronics Corporation (UMC) | The Buildout — AI Infrastructure
The Verdict
United Microelectronics Corporation is a pure-play semiconductor foundry. It fabricates chips to other companies' designs on its own proprietary processes, at mature and specialty nodes rather than the leading edge. In the AI buildout its role is the plumbing around compute: power-management ICs, connectivity chips, FPGA, advanced packaging and silicon photonics. It does not make GPUs or XPUs, high-bandwidth memory, or CoWoS packaging. Management defines its AI business broadly, as the specialty solutions associated with AI as an end product, starting with power management and connectivity, with silicon photonics and advanced packaging described as the fastest-growing parts.
| Market Cap | — |
| Revenue (TTM) | $8.0B |
| Revenue Growth | +6.3% |
| EBITDA Margin (TTM) | 44.9% |
| Net Cash | $2.9B |
| Earnings Beats | 4 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Management quantified AI-related revenue for the first time: about USD 300M in 2026, targeted above USD 1B within three years.
- Loading and margin stepped up together — utilization moved 79% to 85% to a guide above 90%, and gross margin moved 29.2% to 32.5% to a mid-30% guide.
- 22/28nm is now the largest revenue pool at 37% of 2Q26 revenue and 22nm was a record 17.5%, with management framing specialty as half of revenue.
- Advanced packaging deepened: more than 10 active customers and products in discussion up from 20+ in January to 35+ in July, with tape-outs expected in 2026 and early 2027.
- The balance sheet carries net cash: $3,916.5M of cash plus $712.5M of short-term investments against $1,705.0M of total debt at June 30, 2026.
What We’re Watching
- Depreciation is guided up low-teens % year over year for at least 2026-27 — a multi-year gross-margin constraint that management answers by pointing to EBITDA.
- About TWD 30B of 2Q26 net income of TWD 42.26B came from non-operating investment and dividend income tied to stock-market performance.
- Customer inventory is building: management said smartphone and consumer DOI are rising while auto and industrial stay above historical averages, even as it guides utilization above 90%.
- New Singapore P4 and Tainan capacity has a stated lead time over 20 months, putting contribution in the 2028-29 cycle, and no install schedule has been confirmed.
The operating franchise strengthened in the first half of 2026: loading, mix and pricing moved in the same direction, and management raised its capital plan to match AI demand. Two things sit against it. Reported profit is heavily non-operating, and a multi-year depreciation curve is already disclosed and quantified. The open question is whether silicon photonics and advanced packaging qualify at customers in time to fill the new Singapore and Tainan capacity, or land into sockets competitors are already serving.
Earnings Beat
UMC reported 2Q26 revenue of TWD 68.73B, up 12.6% quarter over quarter and 17.0% year over year, with gross margin of 32.5% and gross profit of TWD 22.3B. Utilization rose to 85% from 79%, and wafer shipments reached 1.13 million 12-inch equivalent wafers, up 10.6% sequentially, with blended ASP up a low single-digit percentage. Net income attributable to parent was TWD 42.26B, a figure that included roughly TWD 30B of non-operating investment and dividend income.
| Metric | Q2 FY2026 | Q1 FY2026 | Q2 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $2.2B | $1.9B | $2.0B | +7.3% |
| Gross margin | 32.5% | 29.2% | 28.7% | +380bps |
| EBITDA | $977M | $852M | $867M | +12.7% |
| EPS | $0.53 | $0.20 | $0.12 | +336.6% |
| Capacity utilization | 85% | 79% | n/a | — |
| Non-operating investment/dividend income | ~TWD 30B | n/a | n/a | — |
The current revenue for 2026 is projected to close to approximately $300 million for this year. And looking ahead, in 3 years, we expect the AI exposure to exceed USD 1 billion.— Jason Wang, CEO, 2026-07-29
Management tone: The 2Q26 call reads as more confident and more concrete than the January call. What moved: the 2026 CapEx budget was raised to USD 2 billion alongside a roughly USD 5 billion board-approved envelope; utilization guidance stepped from 85% to above 90%; the first quantified AI revenue target appeared; the first commercial silicon photonics shipment was announced; and pricing language moved from "firm" to an expected "more meaningful pricing uplift in 2027." Management was direct on demand, pricing, customer inventory and the AI definition, and deliberately non-quantitative on capacity scale, advanced packaging TAM, and any node roadmap beyond 12nm. Both the CEO and CFO redirected gross-margin questions to EBITDA.
Management Guidance
For 3Q26, management guided wafer shipments up by high single digits quarter over quarter, ASP firm in U.S. dollars, gross margin in the mid-30% range and capacity utilization above 90%, with 8-inch loading reaching 85%. It raised the 2026 CapEx budget to USD 2 billion from USD 1.5 billion and said depreciation will increase by low teens percent year over year "for over the next 2 years at least." Management expects "more meaningful pricing uplift in 2027" and targets AI-related revenue above USD 1 billion within three years, from about USD 300 million in 2026. The CFO attributed the higher third-quarter gross margin mainly to the higher utilization rate.
Trajectory
Revenue was flat across three quarters, then accelerated: it fell 3.5% sequentially in the September 2025 quarter, rose 1.6% in December, slipped 3.1% in March 2026, then rose 12.9% sequentially to $2,159M in the June 2026 quarter. Gross margin moved from 29.8% to 32.5% over those four quarters, and EBITDA margin has held in a 44% to 46% band. Management attributes the improvement to loading — utilization rose from 79% to 85% and is guided above 90% — with a richer mix as 22/28nm becomes the largest revenue pool. The offsetting force is depreciation, guided up low-teens percent year over year for at least two more years.
The Model
The model projects FY+1 revenue of $8,802M with EBITDA of $4,049M, a 46.0% EBITDA margin. For FY+2 it projects revenue of $9,950M and EBITDA of $4,696M, a 47.2% margin. The near-term anchor is the loading and mix already guided — utilization above 90% and a mid-30% gross margin in 3Q26, with pricing uplift expected in 2027 offsetting part of a rising depreciation charge. The second year depends on whether silicon photonics and advanced packaging convert from tape-outs into production revenue, and on how fast depreciation grows against the operating line.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $7.7B | $8.8B | $9.9B |
| YoY Growth | — | +14.7% | +13.0% |
| EBITDA | $3.3B | $4.0B | $4.7B |
| EBITDA Margin | 43.6% | 46.0% | 47.2% |
Projections are the median of 5 independent model runs. The model’s revenue sits 6.1% below analyst consensus.
For 3Q26, management guided wafer shipments up by high single digits quarter over quarter, ASP firm in U.S. dollars, gross margin in the mid-30% range and capacity utilization above 90%, with 8-inch loading reaching 85%. It raised the 2026 CapEx budget to USD 2 billion from USD 1.5 billion and said depreciation will increase by low teens percent year over year "for over the next 2 years at least." Management expects "more meaningful pricing uplift in 2027" and targets AI-related revenue above USD 1 billion within three years, from about USD 300 million in 2026. The CFO attributed the higher third-quarter gross margin mainly to the higher utilization rate.
What Could Go Right — and Wrong
- Silicon photonics reaches platform general availability in 2027 and fills quickly, with named customers, on the strength of a 12-inch process against peers' 8-inch.
- The 2027 pricing uplift lands at or above the "more meaningful" level management expects, offsetting the depreciation step.
- Advanced packaging tape-outs expected in 2026 and early 2027 convert into production revenue, deepening the more than 10 active customer relationships.
- The 8-inch rebound proves durable, improving mix and absorption on legacy capacity at low incremental capital spending.
- AI-related revenue confirms the trajectory toward more than USD 1 billion within three years on the annual disclosure.
- Non-operating investment and dividend income reverses, removing roughly TWD 30B of the TWD 42.26B in 2Q26 net income without any change in fab operations.
- The new Singapore P4 and Tainan capacity lands into a market where GlobalFoundries and Tower Semiconductor already hold silicon photonics contracts and customer prepayments.
- Consumer weakness — handset, PC and notebook guided to decline year over year, with consumer at 31% of FY2025 revenue — overwhelms the AI offset from a roughly 3% base.
- Depreciation rises faster than the low-teens guide, or the phased expansion accelerates before the matching revenue arrives.
- A further capacity-timeline slip shifts the 2028-29 revenue landing out while depreciation continues.
Looking Ahead
Over the next twelve months the tests are operational and competitive. 3Q26 results will show whether the utilization and gross margin guides land, and the 2026 CapEx budget of USD 2 billion is tracked quarter by quarter across 2026-27. Two deadlines matter more: advanced packaging tape-outs are expected in 2026 and early 2027, and the silicon photonics platform reaches general customer availability in 2027 — the same year Intel 12nm product tape-out and pilot activity begin. The company has not yet confirmed an install schedule for Singapore P4 or the Tainan P7 and P8 shells, and 2028 CapEx will depend on the phase expansion.
- Early October 2026September monthly sales — Shows whether August's +30.71% YoY print was a trend or a pull-in.
- Q3 2026Third-quarter results — Tests utilization above 90% and the mid-30% gross margin guide.
- 2026 and early 2027Advanced packaging tape-outs — Converts the 35+ products in discussion into revenue programs.
- 2027Silicon photonics platform GA — Tests whether design-ins validate the 12-inch process.
- 2027Intel 12nm tape-out — First hard proof of the collaboration; pilot stage follows.
- 2027Expected pricing uplift — The line item that could offset the depreciation step.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $7.2B | $7.7B | $8.0B | +6.3% |
| Gross Margin | 32.6% | 29.0% | 30.6% | 360bps |
| EBITDA | $3.1B | $3.3B | $3.6B | +8.6% |
| EBITDA Margin | 42.7% | 43.6% | 44.9% | +91bps |
| Net Income | $1.5B | $1.4B | $2.6B | -7.9% |
| Free Cash Flow | $65M | $1.6B | $1.9B | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)30.6%
- EBITDA Margin (TTM)44.9%
- Net Margin (TTM)33.1%
- ROIC11.3%
- FCF Conversion52.5%
- SBC / Revenue0.2%
The Company
UMC is a pure-play semiconductor foundry. It manufactures chips to other companies' designs using its own proprietary processes, and it describes itself as one of the world's largest independent foundries and a leader in semiconductor manufacturing process technologies. Its focus is mature and specialty nodes rather than the leading edge: 22/28nm is now its largest revenue pool at 37% of 2Q26 revenue, 22nm alone was a record 17.5%, and management says specialty offerings are half of revenue. In the AI buildout its products are the supporting parts — power management, connectivity and FPGA primarily on 40nm and 65nm, plus advanced packaging and silicon photonics. It does not make GPUs, XPUs, high-bandwidth memory or CoWoS. The 20-F names Texas Instruments, Intel, MediaTek, Realtek and Novatek as primary customers by revenue.
UMC runs 11 named fabs across Taiwan, China, Singapore and Japan, spanning 6-inch, 8-inch and 12-inch wafers. In Hsinchu, Taiwan it operates several 8-inch fabs and the 6-inch Wavetek line; 8-inch Fab 8N is in Suzhou, China. The 12-inch sites are Fab 12A in Tainan, Taiwan, Fab 12i in Singapore, Fab 12X in Xiamen, China and Fab 12M in Mie, Japan. It reports a single operating segment, wafer fabrication, and files a 20-F as a foreign private issuer rather than a 10-K, with no 10-Q. Capacity is being expanded now: Singapore Fab 12i is heading to 192,000 12-inch wafers, a Singapore P4 cleanroom is board-approved for silicon photonics, and new Tainan shells — Fab 12A P7 and P8 — are board-approved for advanced packaging.
Business Segments
Competitive Landscape
UMC competes at mature and specialty nodes. Its filings name TSMC, GlobalFoundries, Tower Semiconductor, SkyWater and Vanguard among its competitors, along with two China-listed entities, and GlobalFoundries, Tower and SkyWater each name UMC in their own competitive disclosures. In the two businesses UMC is building capacity for, the record shows competitors already in market: GlobalFoundries is guiding silicon photonics revenue to more than double in 2026, says its SiGe is oversubscribed throughout 2027, and says it could 10x photonics capacity within its current four walls. Tower Semiconductor is targeting a USD 1 billion silicon-photonics run-rate by the fourth quarter of 2026, with USD 1.3 billion of 2027 SiPho contracts and USD 290 million of customer prepayments. UMC's platform general availability is 2027 and its Tainan advanced-packaging capacity lands in the 2028-29 cycle. The record also shows UMC as replaceable in some sockets: AMD lists it alongside TSMC and Samsung as production sources for its programmable logic devices.
- TSMCNamed among UMC's competitors. Also named as a foundry used by AMD and by Microchip/Allegro alongside UMC.
- GlobalFoundries (GFS)Names UMC among its key competitors. Q2 FY2026 revenue $1.786B, +6% YoY; comms infrastructure/data centre +62% YoY; guides silicon photonics revenue to more than double in 2026 with SiGe oversubscribed throughout 2027.
- Tower Semiconductor (TSEM)Names UMC in specialty competition. Q2 2026 revenue $460M, +24% YoY; SiPho grew more than 270% YoY; targeting a $1B SiPho run-rate in Q4 2026 with $1.3B of 2027 contracts and $290M of customer prepayments.
- SkyWater (SKYT)Lists UMC among its competitors. Q3 2025 revenue $150.7M; FY2026 baseline of $600M revenue and $60M adjusted EBITDA.
- Vanguard (5347.TW)Named in filings; not discussed.
Supply Chain
UMC sits at the fabrication step: it buys silicon wafers and process equipment, fabricates customer designs, and ships finished wafers. It is not part of the leading-edge AI compute chain. Several of its customers name it directly in their own filings.
More on UMC: Earnings recap