Why Sandisk stock (SNDK) surged 22% to $334.75 as Sandisk’s AI memory boom fuels an 800% rally — is SNDK the new AI king?

Sandisk stock (SNDK) stunned Wall Street on Tuesday, January 6, 2026, by surging 21.92% to close at an all-time high of $334.75. The flash memory leader is now the S&P 500's top performer. After debuting at just $36, SNDK has delivered a massive 830% return.