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Call sheet · Q4'25

Western Digital (WDC)

Q4'25 earnings call · held July 30, 2025 · compared with the Q3'25 call · management-credibility review
10/12
Disclosure score
1 high, 2 medium, 3 low flags
Financial quality
Bottom line
The sleeper story isn't AI hype, it's that WDC has contractually locked in essentially 100% of next year's revenue with binding agreements from just 5 customers, something unprecedented in HDD history. Yes, they delivered a blowout quarter with 41.3% gross margins, but the binding constraint remains the 12-month head wafer lead times that physically prevent them from capturing additional demand even at these margins. Most revealing quote: 'We currently have firm POs or LTAs with all of our top 5 hyperscale customers covering our entire fiscal year 2026.' The DSO deterioration and sudden refusal to disclose unit ASP are yellow flags in an otherwise fortress-like business model. My view changes if DSO hits 60 days or any major customer pushes out deliveries.

The 30-second version

  • The real story: WDC has locked in 100% of FY26 revenue with firm POs/LTAs from top 5 hyperscalers
  • The obvious 'AI drives everything' narrative delivered a 30% revenue beat, but the constraint is head wafer production
  • They stopped disclosing ASP per unit and DSO deteriorated from 46 to 52 days

What changed this quarter

MetricQ3'25Q4'25Change
Revenue$2.3B (-5% seq, +31% YoY)$2.6B (+13% seq, +30% YoY)+$300M sequential acceleration
Non-GAAP EPS$1.36$1.66+22% sequential surge
Gross Margin40.1%41.3%+120 bps expansion
Cloud Revenue$2.0B (87% of total)$2.3B (90% of total)Cloud concentration intensifying
Free Cash Flow$436M$675M+55% sequential explosion
Operating Margin26.0%28.1%+210 bps operational leverage
Exabytes Shipped145 EB (-6% seq)190 EB (+31% seq)Massive capacity acceleration
26TB/32TB Drive Units~800K units1.7M unitsDoubled in one quarter
Days Sales Outstanding46 days (per Q3 call)52 days+6 days deterioration
Net Debt$3.9B (1.7x leverage)$2.6B (1.0x leverage)Hit leverage target early

Accountability tracked

7 new promises made4 narrative shifts flagged6 prior promises scored
Inside the full report
The complete write-up covers the full promise ledger with kept/missed calls, disclosure-quality scoring, the metrics-vanished check, verification items, and the questions to ask next quarter.
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Scores, kept-promise rates, and flags on this site reflect the author's opinion, applying a stated methodology to statements management made on public earnings calls. Informational and educational purposes only - not investment advice, a recommendation, or an offer to buy or sell any security. Sources believed reliable but not guaranteed; the author may hold positions in the securities discussed.

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