Two companies make
almost all the world's
hard drives.
Building a new hard-drive factory takes decades. *Nobody is going to.*
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✦ The bottom line
Seagate keeps 46.5¢ of every dollar of sales — up from 35.2¢ a year ago. The moved because two things moved together: more demand, and better technology (HAMR/Mozaic).
↓ the brief below
✦ Teach me
Cents kept per dollar of sales
For every dollar a customer pays Seagate, some pays for raw materials, factory operations, components, and shipping. The cents left over — before paying for R&D and offices — is the company's ~gross margin~.
Hard drives became a 2-player market over the last 15 years. When demand jumps, both players have pricing power — but the company with higher bits-per-square-inch (areal density) has structurally lower cost per terabyte.
Wall Street calls this
Gross margin
*46.5¢ per dollar* is the highest Seagate has reported in years. It tells you the *combination* of demand + density advantage is showing up in *real cash.*
Cents Seagate keeps per dollar · Q3 FY26
46.5
¢
A year earlier — 35.2¢. An 11-point jump in 12 months. Operating margin moved even more — from 20.0% to 32.1%.
An 11-point margin jump on its own is good news. But Seagate has one direct peer — Western Digital, also pure-HDD since spinning off Sandisk. Reading the head-to-head tells you whether Seagate's density-leadership translates into actual better economics, or whether both companies are just enjoying the same cycle equally.
Seagate vs. Western Digital · ~gross margin~
Cents kept per dollar of sales — most recent reported quarter
Seagate
46.5¢
Western Digital
50.2¢
Western Digital is slightly ahead on gross margin. Seagate counters with operating discipline — its 32.1% GAAP operating margin runs ahead of WDC's on the same revenue base.
Source · 10-Q · Western Digital Q3 FY26 — quarter ending 2026-04-03 · Filed May 1, 2026
How the moat got built
2000s
Hard-drive industry had a dozen players. Brutal price wars. Margins in the single digits.
2011–2012
Consolidation. Seagate buys Samsung's HDD business. Western Digital buys Hitachi GST. Industry shrinks to 2 players (plus Toshiba).
2020s
Seagate ships the industry's first drives under the Mozaic brand — fitting more bits per square inch than competitors. Density = lower cost per terabyte.
Now
Two companies serve almost all hyperscale hard-drive demand. Pricing is firm. Nobody is building a new HDD plant.
✓
Strong
46.5¢ per dollar, highest in years. Density-led in a 2-player market.