SanDisk (SNDK) Stock Soars as Flash Storage Maker Secures S&P 500 Entry

TLDR

• SanDisk stock rallied 22% Monday after S&P 500 index addition announcement
• Company replaces Interpublic Group in the benchmark starting November 28
• Western Digital spun out SanDisk in February after acquiring it in 2016
• Latest quarter revenue grew 23% to $2.31 billion with strong storage demand
• Morgan Stanley upgraded price target to $273 ahead of index inclusion

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SanDisk stock climbed 22% Monday after S&P Dow Jones Indices announced the flash storage company’s addition to the S&P 500. The stock gained 13.3% in regular trading before adding 9% in extended hours.

Sandisk Corporation, SNDK

The index change becomes effective November 28. SanDisk will replace Interpublic Group, which is exiting due to its acquisition by Omnicom.

S&P 500 additions typically drive share price increases. Index-tracking funds must buy shares to maintain proper benchmark allocation. This creates automatic buying pressure.

The move comes just nine months after Western Digital spun out SanDisk. The company now carries a market capitalization near $33 billion.

Western Digital purchased SanDisk in 2016 for $15.6 billion. The parent company separated its flash storage division in February, returning SanDisk to independent status.

Recent Earnings Beat Expectations

SanDisk posted third-quarter results that exceeded analyst projections on November 6. Revenue reached $2.31 billion, marking 23% growth year-over-year.

The company shipped 31% more exabytes of storage compared to the previous year. Strong demand across multiple product categories fueled the growth.

SanDisk manufactures storage solutions for gaming computers, digital cameras, and security systems. The company also targets large data center operators for enterprise deals.

Analyst Support Strengthens

Morgan Stanley analyst Joseph Moore raised his SanDisk price target Monday. The new target sits at $273, up from $263. Moore maintained his Overweight rating on the shares.

The analyst upgrade arrived the same day as the S&P 500 announcement. Both catalysts combined to push shares higher throughout the session.

SanDisk becomes the latest tech company joining the S&P 500 in 2025. AppLovin, Datadog, DoorDash, and Robinhood entered the index earlier this year.

Technology stocks continue gaining representation in the benchmark. Internet, software, and semiconductor companies now comprise an increasing portion of the index’s total value.

Index Changes Take Effect Friday

The S&P 500 rebalancing goes live before Friday’s market open. Fund managers will execute trades to reflect the new composition.

Interpublic Group exits after receiving European Commission antitrust approval for its Omnicom acquisition Monday. The advertising company merger was first announced in December.

Additional index changes affect smaller benchmarks. PTC Therapeutics replaces SanDisk in the S&P SmallCap 600. Upwork joins the SmallCap 600 in place of Premier, while First Interstate BancSystem replaces Hanesbrands.

Premier’s acquisition by Patient Square Capital closes November 25. Gildan Activewear expects to complete its Hanesbrands purchase by December 1.

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