The world's second-largest memory chip manufacturer said in a regulatory filing it posted 17.57 trillion won ($13 billion) in revenue for the third quarter, up 93.8 percent from a year earlier.
Operating profit was 7.03 trillion won ($5.2 billion), swinging from an operating loss of 1.79 trillion won in the same period last year. Net profit reached 5.75 trillion won.
The results surpassed the previous record sales of 16.42 trillion won set in the second quarter. Operating profit and net profit both exceeded previous highs set during the semiconductor boom in the third quarter of 2018, when it posted an operating profit of 6.47 trillion won and a net profit of 4.69 trillion won.
Sales of HBM (high bandwidth memory) jumped more than 70 percent from the previous quarter and 330 percent year-on-year, as data center customers increased AI server deployments.
Average selling prices for both DRAM and NAND products rose by mid-10s percentages from the second quarter.
"We have solidified our position as the global No. 1 AI memory company," said CFO Kim Woo-hyun. "We will maintain flexible product and supply strategies to maximize profitability while securing stable revenue."
The company expects HBM sales to reach 40 percent of total DRAM revenue in the fourth quarter, supported by the mass production of 12-layer HBM3E chips launched last month.
SK hynix forecasts continued strong AI memory demand in 2024, citing investments in multimodal AI and artificial general intelligence development by global tech firms.
It also expects PC and mobile memory markets to stabilize as AI-optimized products enter these segments.