Leading data storage manufacturer Western Digital (NASDAQ: WDC) reported Q1 CY2026 results beating Wall Street’s revenue expectations, with sales up 45.5% year on year to $3.34 billion. On top of that, next quarter’s revenue guidance ($3.65 billion at the midpoint) was surprisingly good and 4.8% above what analysts were expecting. Its non-GAAP profit of $2.72 per share was 13.7% above analysts’ consensus estimates.
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Western Digital (WDC) Q1 CY2026 Highlights:
- Revenue: $3.34 billion vs analyst estimates of $3.26 billion (45.5% year-on-year growth, 2.5% beat)
- Adjusted EPS: $2.72 vs analyst estimates of $2.39 (13.7% beat)
- Adjusted Operating Income: $1.29 billion vs analyst estimates of $1.17 billion (38.6% margin, 10% beat)
- Revenue Guidance for Q2 CY2026 is $3.65 billion at the midpoint, above analyst estimates of $3.48 billion
- Adjusted EPS guidance for Q2 CY2026 is $3.25 at the midpoint, above analyst estimates of $2.75
- Operating Margin: 35.7%, up from 33.1% in the same quarter last year
- Free Cash Flow Margin: 29.3%, up from 16.6% in the same quarter last year
- Inventory Days Outstanding: 74, in line with the previous quarter
- Market Capitalization: $139.9 billion
Company Overview
Founded in 1970 by a Motorola employee, Western Digital (NASDAQ: WDC) is a leading producer of hard disk drives, SSDs and flash memory.
Revenue Growth
A company’s long-term performance is an indicator of its overall quality. Even a bad business can shine for one or two quarters, but a top-tier one grows for years. Western Digital’s demand was weak over the last five years as its sales fell at a 6.3% annual rate. This wasn’t a great result, but there are still things to like about Western Digital. Semiconductors are a cyclical industry, and long-term investors should be prepared for periods of high growth followed by periods of revenue contractions.
We at StockStory place the most emphasis on long-term growth, but within semiconductors, a half-decade historical view may miss new demand cycles or industry trends like AI. Western Digital’s annualized revenue growth of 29.8% over the last two years is above its five-year trend, suggesting its demand recently accelerated. 
This quarter, Western Digital reported magnificent year-on-year revenue growth of 45.5%, and its $3.34 billion of revenue beat Wall Street’s estimates by 2.5%. Beyond the beat, this marks 7 straight quarters of growth, showing that the current upcycle has had a good run - a typical upcycle usually lasts 8-10 quarters. Company management is currently guiding for a 40.1% year-on-year increase in sales next quarter.
Looking further ahead, sell-side analysts expect revenue to grow 31.1% over the next 12 months, similar to its two-year rate. This projection is particularly noteworthy for a company of its scale and implies its newer products and services will catalyze better top-line performance.
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Product Demand & Outstanding Inventory
Days Inventory Outstanding (DIO) is an important metric for chipmakers, as it reflects a business’ capital intensity and the cyclical nature of semiconductor supply and demand. In a tight supply environment, inventories tend to be stable, allowing chipmakers to exert pricing power. Steadily increasing DIO can be a warning sign that demand is weak, and if inventories continue to rise, the company may have to downsize production.
This quarter, Western Digital’s DIO came in at 74, which is 45 days below its five-year average. At the moment, these numbers show no indication of an excessive inventory buildup.
Key Takeaways from Western Digital’s Q1 Results
It was good to see Western Digital beat analysts’ EPS expectations this quarter. We were also excited its adjusted operating income outperformed Wall Street’s estimates by a wide margin. Zooming out, we think this was a good print with some key areas of upside. Investors were likely hoping for more and expectations were high given how well peer Sandisk has performed, and shares traded down 7.3% to $404.60 immediately after reporting.
Big picture, is Western Digital a buy here and now? We think that the latest quarter is only one piece of the longer-term business quality puzzle. Quality, when combined with valuation, can help determine if the stock is a buy. We cover that in our actionable full research report which you can read here (it’s free).
