Key Highlights

  • Samsung Electronics, which is listed in South Korea and not in the United States, rose about 5% on Wednesday, October 28, 2026 as Micron (NASDAQ:MU) and SanDisk (NASDAQ:SNDK) gained pre-market.
  • Micron traded about 2% to 4% higher, a range reflecting two differing snapshots, while SanDisk rose about 4%, and the shared driver was the SK hynix release of Wednesday, October 28, 2026.
  • SK hynix reported operating profit of KRW 83.3338 trillion, up 632% year on year, and a Korean report of Monday, October 19, 2026 cited Counterpoint HBM revenue shares of 50% for SK hynix, 33% for Samsung and 18% for Micron.
  • Samsung's own results and pre-market price are not stated here, and pre-market prices are thinly traded and can change before the open at 9:30 a.m. ET.

Samsung Within the Memory Rally

Samsung Electronics, a South Korean maker of memory chips and other electronics, rose about 5% on Wednesday, October 28, 2026. The company is not listed in the United States, so it carries no US ticker tag here. The gain came alongside Micron (NASDAQ:MU), a US memory chipmaker that traded about 2% to 4% higher pre-market, and SanDisk (NASDAQ:SNDK), a US NAND supplier that rose about 4%. The shared catalyst was the SK hynix release of that day, which showed revenue of KRW 104.6155 trillion and operating profit of KRW 83.3338 trillion. No Samsung announcement dated on or just before the move accompanied it.

Why Samsung's HBM Position Shapes the Read-Across

Samsung's reaction depends on how much of SK hynix's strength transfers to it. A Korean report of Monday, October 19, 2026 cited Counterpoint estimates that Samsung held 33% of second quarter HBM revenue, between SK hynix at 50% and Micron at 18%. HBM, or high bandwidth memory, is the stacked memory paired with AI accelerators. SK hynix said HBM4 is expected to surpass HBM3E in volume and revenue in the fourth quarter. The same report cited Meritz estimates of third quarter price rises of 22% for DRAM and 15% for NAND, which apply to Samsung's commodity memory lines as well. The comparison with the roughly 8% of SK hynix's US traded line is indicative only, because the timing of each snapshot is not stated.

Risks and What to Watch

The bull reading is that a mid sized HBM share plus broad DRAM and NAND price rises give Samsung a direct benefit from the sector read-across. The bear reading is that SK hynix holds the larger HBM share and that Samsung's own figures are not available to confirm any gain. Named risks include a reversal in memory pricing, expanding supply and currency effects on Korean exporters. Investors should watch Samsung's own reported results, the open for Micron and SanDisk at 9:30 a.m. ET on Wednesday, October 28, 2026 and the Federal Reserve decision due later that day. The date of the Samsung results is not stated here.

Where Things Stand

The answer is that Samsung rose about 5% because the SK hynix release lifted memory stocks, with Micron and SanDisk also higher pre-market. SK hynix operating profit rose 632% to KRW 83.3338 trillion, while Samsung's own results are not stated. The next catalysts are the open at 9:30 a.m. ET and the Federal Reserve decision due later on Wednesday, October 28, 2026. Pre-market prices are snapshots and can change, and this is not investment advice.