SanDisk makes the flash memory chips that store data in solid-state drives, memory cards, USB drives, and data center servers. It sells to three kinds of customers: cloud companies that run massive data centers, device makers who embed storage into laptops and phones, and everyday consumers who buy SanDisk-branded cards and drives at retail stores. The company manufactures flash memory through a joint venture with Kioxia in Japan, then packages that memory into finished products sold around the world. The diagram below traces where the money goes.
Three years of financial data tell a story of a business climbing out of a deep hole. In 2023, revenue was $6.1 billion and the gross margin was just 7%. That means for every dollar of revenue, SanDisk kept only seven cents after paying to make its products. Operating cash flow was negative $713 million. The company was burning cash and losing money on nearly every sale.
By 2025, revenue had grown to $7.4 billion and gross margin had climbed to 30%. That is a dramatic improvement in just two years. The recovery came from two places: better pricing as the supply-demand balance for flash memory improved, and a surge in cloud revenue. Cloud sales jumped 195% in 2025 compared to 2024, driven by data centers buying more enterprise solid-state drives for artificial intelligence workloads.
Cash flow is also recovering, though slowly. Operating cash flow went from negative $713 million in 2023 to positive $84 million in 2025. Free cash flow is still slightly negative at around negative $100 million, meaning the company is still not generating surplus cash after capital spending. That matters because SanDisk took on $2 billion in debt when it separated from Western Digital in February 2025, paying out $1.5 billion of that straight back to Western Digital as part of the split.
There is one number that complicates the otherwise improving picture. In 2025, SanDisk recorded a $1.8 billion goodwill impairment charge. This happened right after the company separated from Western Digital and ran a formal analysis of its own value. The analysis concluded that the business was worth less than its carrying value on the books. The net result was a reported net loss of $1.641 billion in 2025, even as the underlying business was improving.
The risks facing SanDisk are specific and serious. The most fundamental one is supply. Virtually all of SanDisk's flash memory comes from Flash Ventures, its joint venture with Kioxia in Japan. SanDisk must pay 50% of Flash Ventures' fixed costs no matter how much memory it actually orders. When demand drops and SanDisk pulls back on orders, it still owes half the fixed bill. That is exactly what happened in 2023, when the company paid $296 million in charges for unused manufacturing capacity and wrote down $108 million in inventory. Even in the better year of 2025, underutilization charges totaled $75 million.
The joint venture agreements themselves are a risk. Flash Partners and Flash Alliance expire on December 31, 2029. Flash Forward expires December 31, 2034. If SanDisk and Kioxia cannot agree to extend those agreements, SanDisk loses the source of nearly all its flash memory. The company cannot manufacture flash on its own, and it is actually prohibited from working with other flash manufacturers to build competing capacity while Flash Ventures is operating.
Geography adds another layer of risk. The factories that produce SanDisk's flash memory are located in Japan. The company's assembly and test operations are in Malaysia. Both regions are vulnerable to earthquakes, floods, and other natural disasters. SanDisk acknowledges it carries limited or no insurance for natural disasters at these facilities because coverage is either unavailable or too expensive to purchase.
Tariffs are an active concern. Most of SanDisk's products sold in the United States are currently exempt from tariffs, but the U.S. government has stated that semiconductor tariffs may be implemented soon. If those exemptions disappear, the cost of goods sold rises. If SanDisk passes those costs to customers, demand could fall. International sales made up 80% of net revenue in 2025, so trade policy changes in either direction carry real consequences.