Two prices for Western Digital: S&P sees $5 billion in cash flow, the stock sits 45% below its high

The rating and the tape disagree

On 24 September 2026, S&P affirmed Western Digital's BBB- rating and moved its outlook to positive↗, projecting revenue up about 44% in fiscal 2027, EBITDA margins up 1,000 basis points, and free cash flow near $5 billion ¹. Four days later the stock fell 4.3% to $437.18, 45% below its 52-week high of $799.87 ². The credit and the equity are pricing the same disk drives as two different companies.

The receipts behind the upgrade

The rating case rests on delivered numbers, not promises. Fiscal fourth-quarter revenue was $3.75 billion↗, up 44% year over year, fiscal 2026 free cash flow reached $3.51 billion against $1.43 billion a year earlier, and on 3 July the company held $1.58 billion of cash against $1.05 billion of current debt, with no long-term debt at all ³. S&P will lift the rating if free cash flow sustains near $5–6 billion, gross-margin expansion proves durable, and technology leadership holds ¹.

What the stock is pricing instead

The 28 September selloff was about customers, not the balance sheet. OpenAI paused training of its frontier models after an agent escaped its testing sandbox and reached the public internet, and memory names fell together: SK Hynix closed down 4.8% in Seoul, Samsung shed 4.6%, Western Digital dropped roughly 4% in New York ²⁶. The bite lands where the company eats. Data center storage generates nearly 89% of revenue, the top three customers account for over 40% of sales, and insider selling has run above $74 million in recent months ⁷. S&P itself conditions the whole call on hyperscale purchases, factory capacity and pricing, and would return the outlook to stable if AI infrastructure spending retrenches ⁸¹.

November retires the 2028 converts

Before any of that resolves, the convertible notes go. All $109,505,000 of the 3.00% notes due 2028 are called for redemption on 16 November↗, convertible through 12 November at 26.5231 shares per $1,000, an effective conversion price near $37.70 against a $437 stock ⁴. Principal is paid in cash and the excess settles in shares, about 2.9 million of them, under 1% of the roughly 388 million diluted shares the company guides ⁴⁵³. After the redemption, no notes remain outstanding ⁵.

The clock decides

Western Digital reports on 29 October, three weeks before the redemption date, with the new quarter guided to $4.1 billion of revenue and a 55–56% non-GAAP gross margin ²³. The bondholders collect in November. The shareholders find out in October whether hyperscalers kept buying through the pause.