SK海力士董事会批准合计约54.3万亿韩元的龙仁Y2与清州M17新厂投资,系6月已公布的千百万亿韩元总体规划的程序性落地

The company to invest 35.2 trillion won in Yongin “Y2” fab and 19.1 trillion won in the Cheongju “M17” fab

To execute mid-to-long-term investment strategy… Y2 to open cleanroom in June 2029 and M17 in December 2028

Expand production base for both DRAM and NAND and to increase capacity aligned with customer demand

“Strategic investment decision to seize opportunities in line with the market’s growth speed and to contributing to the stability of the global AI semiconductor supply chain.”

Seoul, August 7, 2026 – SK hynix Inc. (or “the company”, www.skhynix.com ) announced today that it has decided to build new fabs in Yongin and Cheongju to respond to the continuously growing demand for memory in the AI era.

The company approved a total investment of approximately 54 trillion, 35.2 trillion won in Yongin “Y2” fab and 19.1 trillion won in the Cheongju “M17” fab, in a board meeting.

This decision represents execution of the mid-to-long-term investment strategy announced by the company last June. Under its master plan to invest 600 trillion won in the Yongin Semiconductor Cluster and 100 trillion won to expand its Cheongju production base, SK hynix is currently constructing its first fab in Yongin (Y1). With this latest decision, the company is embarking on the construction of subsequent fabs in both Yongin and Cheongju.

According to market research firm Omdia, both DRAM and NAND demand are projected to maintain a compound annual growth rate (CAGR) of 19% from last year through 2030. The company views this growth not as a temporary supercycle, but as a structural transformation in which memory transcends its role as a mere component to become core infrastructure determining AI performance itself.

SK hynix stated that in the AI era, technological competitiveness alone is not enough and the ability to supply the required volume at the exact moment customers need it is the ultimate competitive advantage. We reached this investment decision after a thorough review of market demand.

Yongin Y2 is the second of four fabs planned sequentially for the Yongin Semiconductor Cluster. It will serve as a DRAM production base spanning a total floor area of 341,000 pyeong (approximately 1,130,000m²). Construction is scheduled to break ground in July next year, targeting the opening of its first cleanroom in June 2029 to produce high-bandwidth memory (HBM) and other next-generation DRAM products. Meanwhile, construction on Y1 is progressing smoothly toward its initial cleanroom opening target of February next year.

SK hynix previously set a goal to advance the completion date of the Yongin Semiconductor Cluster by 12 years—from the originally planned 2045 to 2033—to finish constructing all four fabs. The Y2 construction serves as the second phase supporting this accelerated timeline and the investment spans to October 2031 sequentially.

The investment amount includes construction costs for “Business Support Building” with administrative and welfare facilities for Y2 personnel, an “Integrated R&D Center” to consolidate product development testing, analysis, and experiments, as well as auxiliary infrastructure * .

* Auxiliary infrastructure: Water treatment facilities, utility conduits (underground structures capable of accommodating power lines, telecommunications lines, water/sewer pipes, and thermal supply lines), substations, warehouses, etc.

For the Yongin Semiconductor Cluster—sprawling over approximately 1.26 million pyeong(approximately 4,160,000m²) in Wonsam-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do—Phase 1 power and water infrastructure required up through Y2 operation is nearing completion, currently at a 99% progress rate. As fab construction and infrastructure setup have been carried out concurrently, the company plans to proceed with the Y2 construction according to schedule.

In the NAND market, demand is surging rapidly centered on enterprise SSDs driven by the full-scale expansion of AI services. This is further boosted by demand for key-value (KV) cache * storage in AI inference, with application fields expected to broaden further as Agentic and Physical AI are introduced.

* KV Cache: A technique that stores and reuses previously computed Key and Value vectors to minimize inefficient redundant calculations during inference.

SK hynix selected Cheongju as its new NAND fab base because it offers the fastest fab construction timeline. The Cheongju Campus already houses the M11, M12, and M15 fabs, enabling efficient production linked to existing operations on sites equipped with substantial pre-established power and water infrastructure. Cheongju M17 will be built across a total area of 206,000 pyeong(approximately 680,000m²), breaking ground in February next year with plans to open its first cleanroom in December 2028. The investment period runs through April 2031 according to the master plan.

SK hynix plans to proactively secure production infrastructure based on mid-to-long-term demand discussed with customers, while expanding actual production capacity in alignment with the timing of customer needs. Fabs will be constructed according to the master schedule, whereas cleanroom expansions and equipment installation will take place sequentially in line with demand trends to maximize capital efficiency.

The company expects this investment to secure future growth foundations while strengthening the competitiveness of the domestic semiconductor ecosystem and boosting local economies. The large-scale simultaneous investments in Yongin and Cheongju are anticipated to expand joint growth opportunities for supply chain partners, generate employment, and revitalize local commercial districts, thereby contributing to the sustainable growth of the national economy.

An SK hynix official stated that “This investment is a decision made to seize opportunities in line with the market’s growth speed. By proactively securing production capabilities, we aim to establish ourselves as a key partner in AI infrastructure, contributing to the stability of the global AI semiconductor supply chain.”

▲ Rendering of the Yongin Semiconductor Cluster

▲ Rendering of the M17 fab that SK hynix plans to build in Cheongju

About SK hynix Inc.

SK hynix Inc., headquartered in Korea, is the world’s top-tier semiconductor supplier offering Dynamic Random Access Memory chips (“DRAM”) and flash memory chips (“NAND flash”) for a wide range of distinguished customers globally. The Company’s common shares are traded on the Korea Exchange, its American Depositary Shares are traded on NASDAQ, and its Global Depository Shares are listed on the Luxembourg Stock Exchange. Further information about SK hynix is available at www.skhynix.com , news.skhynix.com .

Forward-Looking Statements

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Media Contact

SK hynix Inc.

Global Public Relations

Technical Leader

Minseok Jang

E-Mail: global_pr@skhynix.com