


The global HDD disk media market is estimated at US$ 3.31 billion in 2025 (base year), forecast to reach approximately US$ 5.62 billion by 2031, a CAGR of 9.2% across 2025–2031. In volume terms, the market is estimated at 601.0 million platters in 2025, expanding to approximately 729.0 million platters by 2031.
This report identifies two distinct, directly-confirmed near-monopoly structures: Resonac Holdings Corporation is the sole independent merchant supplier of finished magnetic recording media (TrendFocus/ StorageNewsletter), while HOYA Corporation is independently confirmed as the world's sole supplier of HDD glass substrates (100% share, 2.5-inch; growing share, 3.5-inch). A recurring "HOYA, Resonac, Ohara" three-competitor claim from lower-quality aggregator sources was investigated and found directly contradicted by HOYA's own disclosures.
This report covers market sizing and volume analysis (2022–2031), segmentation by substrate material and application, country-level forecasts for the confirmed manufacturing geography (Singapore, Japan, Thailand, Vietnam, China), verified company profiles, competitive landscape, Porter's Five Forces, PESTLE, and SWOT analysis.
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