Key Highlights

  • SanDisk (NASDAQ:SNDK) rose about 4% in pre-market trading on Wednesday, October 28, 2026, a figure from market data, as the SK hynix release of the same day lifted memory chip stocks.
  • SK hynix reported third quarter operating profit of KRW 83.3338 trillion, up 632% year on year, and said 321-layer TLC eSSD sales expanded, with 321-layer to exceed half of its domestic NAND capacity in the fourth quarter.
  • Estimates cited in a Korean report of Monday, October 19, 2026 pointed to NAND price rises of about 15% in the third quarter and of 15% to 20% for fourth quarter contract prices.
  • No SanDisk revenue, earnings or guidance figure is stated here, so the link to NAND pricing rests on mechanism, and pre-market prices can change before the open at 9:30 a.m. ET.

The Move and the NAND Link

SanDisk (NASDAQ:SNDK), a US maker of NAND flash memory used in storage devices, rose about 4% in pre-market trading on Wednesday, October 28, 2026, according to market data. No company-specific announcement dated on or just before that day accompanied the move. The move appears consistent with the sector read-across from SK hynix, whose release of Wednesday, October 28, 2026 showed operating profit of KRW 83.3338 trillion and revenue of KRW 104.6155 trillion. NAND is the flash memory that stores data without power, and its pricing is the main driver of earnings for a pure NAND supplier. SanDisk figures are not stated, so the size of its exposure is not given.

How the NAND Price Outlook Connects to Earnings

Pricing estimates cited in a Korean report of Monday, October 19, 2026 give the mechanism. Meritz estimated that NAND prices rose about 15% in the third quarter, and J.P. Morgan estimated that fourth quarter NAND contract prices would rise 15% to 20%. A contract price is the negotiated price for large supply agreements. For a supplier of NAND, a higher price per unit raises revenue and, if costs are stable, widens margins. SK hynix added that demand is expected to exceed supply through 2030. For SanDisk (NASDAQ:SNDK), these points describe a supportive backdrop. They are broker estimates and a peer's outlook, not SanDisk guidance.

Risks and What to Watch

The bull reading is that estimated NAND price rises of 15% to 20% in the fourth quarter would flow through to revenue for SanDisk (NASDAQ:SNDK). The bear reading is that the move rests on a peer's results and broker estimates, with no SanDisk figures to confirm it. Named risks include a reversal in contract pricing, added NAND capacity at peers and thin pre-market liquidity. Investors should watch SanDisk's own reported figures and guidance, the open at 9:30 a.m. ET on Wednesday, October 28, 2026 and the Federal Reserve decision due later that day. The dates of the next SanDisk results are not stated here.

Where Things Stand

The answer is that the 4% pre-market gain in SanDisk (NASDAQ:SNDK) appears consistent with a read-across from SK hynix and with estimated NAND price rises, although SanDisk's own figures are not stated. SK hynix reported operating profit up 632% to KRW 83.3338 trillion. 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.