SK hynix leads AI memory with record margins and HBM dominance, but peak-cycle valuation creates an unfavorable five-year risk/reward profile.
Overview
SK hynix is a global memory and storage manufacturer whose revenue is generated primarily by DRAM, at approximately 60%–70% of sales, and NAND Flash, at approximately 30%–35%. Its key customers are OEMs and hyperscale cloud providers, with AI servers, enterprise storage, PCs and mobile devices as major end markets. **The company has become the primary qualified HBM partner for leading GPU accelerators**, supported by MR-MUF packaging, thermal-management advantages and early leadership in high-density memory. Q1 2026 revenue reached 52,576.3 billion KRW, up 60.0% sequentially and 198.0% year over year, while operating profit rose 405.0% year over year to 37,610.3 billion KRW and operating margin reached 72.0%. Revenue beat consensus by 6.06% and EPS exceeded expectations by 49.71%. The balance sheet strengthened to 35.0 trillion KRW of net cash. However, valuation is demanding: trailing P/E is approximately 17.59x–18.29x and P/B is 10.64x versus a five-year average of 2.85x. Near-term catalysts include HBM4 shipments, 321-layer enterprise SSD ramp-up and B2B contract migration, but the report’s five-year weighted target implies substantial downside.