SanDisk Jumps 11.9% on S&P 100 Inclusion

Insider Monkey·5 Sep 2026·

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Corporate Action Technology Hardware, Storage & Peripherals

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Summary · why it matters

SanDisk Corp. rallied for a third consecutive day on Friday, jumping 11.9 percent to close at $1,740 apiece as investors gobbled up shares ahead of its addition to the S&P 100 index later this month. As part of its latest quarterly index rebalancing, S&P Dow Jones Indices announced that SanDisk will join the S&P 100 beginning September 21, alongside Dell Technologies, Palo Alto Networks, and Arista Networks, replacing Honeywell Aerospace, Nike Inc., Simon Property Group, and Colgate-Palmolive. The inclusion marks a significant milestone for the memory maker, potentially providing greater visibility among institutional and global investors and propelling demand for its shares as funds tracking the S&P 100 reposition their portfolios. The rally also reflects portfolio-positioning ahead of SanDisk's participation in the Citi 2026 Global TMT Conference on Tuesday, September 8, and Goldman Sachs' Communacopia + Technology Conference 2026 on Wednesday, September 9. Institutional investors turned highly optimistic in the second quarter, with 128 hedge funds holding positions, up from 114 in the first quarter, and their combined holdings soaring by 125 percent to $25.6 billion from $11.3 billion quarter-on-quarter.

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