World’s largest OSAT (packaging & test)

ASE Technology

The world’s largest OSAT (back-end packaging and test). FY2025 revenue about $19B (~$5B per quarter). It absorbs CoWoS advanced-packaging and test volume that TSMC overflows, serving AI-chip customers such as Nvidia and AMD; advanced-packaging revenue jumped from $0.45B (2024) to $1.1B (2025).

ASX Updated Jun 20, 2026 1 AI consumers

Money in ▸팹리스·IDM 고객●Revenue ~$19BNVIDIA●AMD◐
ASE TechnologyFY2025 revenue about $19B
▸ Money outBESI◐Samsung Electro-Mechanics◐Hanmi Semiconductor◐ASMPT◐소재·리드프레임 (비공개)○

Financials & Segments

  • Total revenue · FY2025 revenue about $19B (advanced packaging $1.1B, +144%)
  • Customer concentration · World’s #1 OSAT. Customers Nvidia, AMD and other fabless. Benefits from TSMC CoWoS overflow.
  • Segments · ATM (packaging & test) · EMS

Revenue from

  • 팹리스·IDM 고객 High confidence· Revenue ~$19B · FY2025 · annual total revenue (approx)
    Packaging and test for many fabless/IDM customers (world’s #1 OSAT). FY2025 revenue about $19B.
    Confirms EN SEC EDGAR Published Apr 1, 2026: "World’s #1 OSAT, ~$5B quarterly revenue."
    Confirms EN DigiTimes Published Oct 31, 2025: "Advanced packaging revenue $0.45B (2024) to $1.1B (2025)."
  • NVIDIA High confidence
    Advanced packaging (CoWoS overflow) and test for Nvidia AI chips; absorbs volume TSMC transfers.
    Confirms EN SEC EDGAR Published Apr 1, 2026: "20-F: advanced packaging and test for major fabless customers."
    Confirms EN TrendForce Published Jan 14, 2026: "ASE packaging orders span Nvidia."
    Confirms KO Global Economic Published Dec 9, 2025: "ASE absorbs TSMC CoWoS overflow, serving Nvidia."
  • AMD Medium confidence
    Full-process packaging for AMD Venice CPUs (from 2026, est. $300-400M).
    Confirms EN TrendForce Published Jan 14, 2026: "AMD Venice CPUs to enter ASE full-process packaging in 2H 2026."

Pays to

  • BESI Medium confidence
    Buys die-attach and hybrid-bonding tools from BESI.
    Mentions EN SEC EDGAR Published Apr 1, 2026: "20-F: buys advanced-packaging equipment."
  • Samsung Electro-Mechanics Medium confidence
    Buys package substrates (FC-BGA, etc.) from suppliers such as Samsung Electro-Mechanics.
    Mentions EN SEC EDGAR Published Apr 1, 2026: "20-F: sources package substrates."
  • Hanmi Semiconductor Medium confidence
    Buys TC bonders and back-end tools from Hanmi Semiconductor.
    Mentions EN SEC EDGAR Published Apr 1, 2026: "ASE buys back-end equipment (incl. Hanmi)."
  • ASMPT Medium confidence
    Buys die/wire bonders and packaging tools from ASMPT.
    Mentions EN SEC EDGAR Published Apr 1, 2026: "20-F: buys back-end equipment from key toolmakers."
  • 소재·리드프레임 (비공개) Low confidence
    Buys leadframes, bonding wire and molding materials (undisclosed).
    Mentions EN SEC EDGAR Published Apr 1, 2026: "20-F: packaging-materials supply chain."

Value-chain ripple (tiers 2–3)

Following node-to-node links up to 3 tiers; each firm is shown once, at its nearest tier.

Leading firms (revenue chain)

Beneficiaries (payment chain)

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