On August 27, SanDisk Corp. rose 3.38% in after-hours trading, trading at approximately $1,549.49/share, with turnover of $1.133 billion. The rally was driven by regulatory filings revealing that quantitative trading giant Jane Street dramatically increased its stake in SanDisk.

According to the disclosure, as of July 29, Jane Street held approximately 7.41 million shares of SanDisk, an increase of roughly 6.25 million shares from its prior position, representing a nearly 540% surge in holdings. The stake now exceeds 5% of SanDisk's total outstanding shares, positioning Jane Street among the company's top shareholders. The aggressive accumulation by a top-tier institution during a period when SanDisk had experienced notable pullbacks from its highs sent a positive signal to the market, boosting after-hours sentiment.

SanDisk had previously declined nearly 10% on August 24 due to Samsung's disappointing shareholder return plan and profit guidance concerns, before recovering in subsequent sessions. The Jane Street disclosure provided additional momentum for the ongoing rebound.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)