Seagate (STX): 52% Gross Margin on Hard Drives — Best Quarter Ever, Stock Down 28%

Seagate Technology Holdings plc (STX) Q4 FY2026 — Seagate Technology Holdings plc (STX), one of only two companies that matter in nearline hard disk drives, reported fiscal Q4 2026 (quarter ended July 3, 2026) after the close on July 28. Revenue was $3.629B, +48.5% YoY; GAAP gross margin 52.3% and non-GAAP gross margin 52.7%, against 37.4% and 37.9% a year ago; GAAP diluted EPS $5.58 (vs $2.24) and non-GAAP diluted EPS $5.71 (vs $2.59); income from operations $1.559B versus $568M, a 43% operating margin. Cash flow from operations was $1.3B and free cash flow $1.118B; the company retired $302M of debt and returned $283M to shareholders. Full fiscal year 2026: revenue $12.195B (+34%), GAAP diluted EPS $13.90, non-GAAP diluted EPS $15.58, cash flow from operations $3.674B, record free cash flow $3.105B on capital spending of just $569M, $1.4B of debt retired and $810M returned. Shareholders' equity swung from a $453M deficit to positive $2.167B; net debt is about $1.9B. The board declared a $0.74 quarterly dividend payable October 7, 2026. Guidance for fiscal Q1 2027 is revenue of $4.1B +/- $100M (about +56% YoY) and non-GAAP diluted EPS of $7.30 +/- $0.20, against $2.61 in the year-ago quarter. On the call management said hard drive exabyte shipments reached 218 EB (+34% YoY) with roughly 90% going into data centers; data center revenue was $2.9B, +57% YoY on 195 exabytes, or 81% of total sales; HAMR-based Mozaic products exited fiscal 2026 at about 40% of the nearline exabyte run rate; and the vast majority of nearline exabytes are already allocated under long-term supply agreements through calendar 2028, with customers seeking to extend into 2029 and beyond. The under-covered number: revenue grew 48.5% while exabytes grew 34%, so revenue per exabyte rose roughly 11% — a third of the growth is price and mix, not volume, which is what a supply shortage looks like rather than a productivity gain. The stock closed a year ago at $147, closed as high as $1,094 on June 22, 2026, and traded near $784 after this print — about 28% below that closing high even as earnings accelerated. Seagate just printed the best quarter in its 47-year history, and the stock is still 28% below its June high. Fiscal Q4 2026 (ended July 3): revenue $3.629B, up 48.5% year over year; GAAP gross margin 52.3% and non-GAAP 52.7%, against 37.4% and 37.9% a year ago — nearly fifteen points of gross margin expansion in twelve months, on hard drives; GAAP diluted EPS $5.58 versus $2.24; non-GAAP diluted EPS $5.71; income from operations $1.559B versus $568M, a 43% operating margin. For the full year: revenue $12.195B (+34%), non-GAAP EPS $15.58, operating cash flow $3.674B and a record $3.105B of free cash flow on only $569M of capital spending. Management retired $1.4B of debt and turned a $453M equity deficit into $2.167B of positive equity. September-quarter guidance is $4.1B of revenue (+56% YoY) and $7.30 of non-GAAP EPS against $2.61 a year ago, and the vast majority of nearline exabytes are already committed under long-term supply agreements through calendar 2028. The industry structure is genuinely better than it was: HDD consolidated from more than a dozen makers to Seagate, Western Digital and a much smaller Toshiba, and Seagate's HAMR-based Mozaic platform exited the year at roughly 40% of the nearline exabyte run rate. So why are we not buying? Because of one number almost nobody wrote about: revenue grew 48.5% while exabytes grew only 34%, meaning revenue per exabyte rose about 11%. That is not a productivity miracle — it is scarcity rent, and rents attract supply. A 52% gross margin has never happened in this industry, and roughly two-thirds of what this stock is worth depends on what Seagate earns in 2031, which nobody knows. We run two honest futures. A cyclical path that peaks in fiscal 2028 near $7.2B of free cash flow and normalizes to $4.6B is worth about $294 a share at a 9% discount. A full AI-storage secular path, free cash flow compounding roughly 18% a year to $12.8B and holding, is worth about $832. Weighted 50/50 — and 9% is a friendly discount rate for a stock with a 2.07 beta, where CAPM argues closer to 14% — fair value lands near $560 against roughly $784 today. Today's price sits almost exactly on our bull case, which means you are paying for the best outcome and absorbing the risk of every other one. Our call: HOLD, 2 out of 5. Wall Street is at Buy/Strong Buy with average targets running $890 to $1,070 and recent raises from Cantor Fitzgerald and Citigroup at $1,300 — so we differ, and we are more cautious. This is a judgment about price, not about the company. Not financial advice. THE CALL: HOLD (2/5, A REAL BOOM, PRICED AS IF IT NEVER ENDS — A JUDGMENT ABOUT THE PRICE, NOT THE COMPANY) — base-case value ~$560.00 vs ~$784.00 today. What to watch: what would move us more bullish is durable evidence that the contracted window keeps extending — long-term nearline supply agreements stretching into 2029 and 2030 at similar pricing, which is what strengthens the terminal-value case that today's price already assumes, alongside gross margin holding above 50% as competitor capacity comes online; the risks that would deepen our caution are the mirror image — gross margin falling while exabytes still rise (the signal that supply has caught demand), Western Digital or Toshiba announcing meaningful nearline capacity additions, any hyperscaler guiding to slower storage purchases, or the long-term agreements failing to extend past calendar 2028, since roughly two-thirds of the value in this stock sits in fiscal 2031 and beyond Also on YouTube: @ChargedAlpha DISCLAIMER: For informational and educational purposes only. Not financial advice. Do your own research before any investment decision.