Shares of SanDisk (SNDK) climbed roughly 7% in Friday trading, placing the stock among the market's top performers while the S&P 500 slipped 0.2% and the Nasdaq edged down 0.1%. The move extended a surge of more than 6% from the prior session, marking a second straight day of gains for the memory chipmaker, and was driven by a combination of blowout quarterly earnings, a massive share repurchase announcement, and a broader rebound across the semiconductor sector.

Blowout Quarter and $14 Billion Buyback

SanDisk reported a 372% jump in revenue in Q4 compared with the same quarter a year earlier, a result that came in well ahead of expectations. The surge reflects a sharp recovery in NAND flash demand, particularly from AI-related datacenter customers. NAND flash is the non-volatile storage technology behind solid-state drives and the high-capacity storage tiers inside modern datacenters, where AI training and inference workloads require rapid access to vast datasets.

Alongside the earnings, the company announced a $14 billion share buyback program. That is a large commitment by any measure, and it signals management's confidence in the business at current levels. Buyback programs of this size return capital to shareholders and reduce the share count over time, with the pace of deployment left to management and typically detailed in quarterly filings.

Nvidia Projection and Post-Fed Relief

The broader semiconductor sector received an additional lift from Nvidia CEO Jensen Huang, who said at an AI executive summit that chip sales in 2027 are expected to reach double 2026 levels. The projection boosted AI memory stocks broadly and reinforced demand expectations for high-performance NAND flash storage, a core component in AI server infrastructure.

The post-Fed environment also helped. The Federal Reserve raised its benchmark rate by 25 basis points on September 16 to a 3.75%-4.00% range, its first hike since 2023. The decision had put pressure on growth stocks, but a subsequent pullback in Treasury yields and oil prices eased that pressure and helped trigger a rebound in AI-linked names including SanDisk.

Wall Street's consensus remains a Buy rating on the stock, with an average 12-month price target of around $2,124.

Insider Sales Under Pre-Scheduled Plans

Attention has also turned to insider transactions. CEO David Goeckeler sold approximately $51.7 million worth of stock on September 14 under a pre-scheduled Rule 10b5-1 trading plan, and CFO Luis Visoso followed with a sale of roughly $1.57 million on September 15 under a similar plan. Trades under such plans are executed automatically, without discretionary decisions at the time of sale.

Both transactions were executed under plans adopted months in advance and are generally viewed as routine portfolio management rather than a signal about the stock's direction.

Year-to-Date Run and Technical Signals

SanDisk is up approximately 580% year to date, making it one of the year's strongest performers and giving the company a market capitalization of around $222.6 billion. Average daily trading volume sits at roughly 13.7 million shares.

The company's growing focus on datacenter and advanced flash products has positioned it at the center of AI infrastructure spending, a theme that continues to attract institutional interest. The technical sentiment signal for SNDK is currently rated Strong Buy. Memory is also a historically cyclical business, with NAND pricing and demand prone to sharp swings between shortage and oversupply, which is one reason the scale of the current rebound draws close attention. Upcoming quarterly results and filings detailing how the $14 billion authorization is being deployed will provide the next concrete checkpoints on the strength of the datacenter-driven recovery.