World’s largest pure-play test OSAT

King Yuan Electronics (KYEC)

The world’s largest pure-play semiconductor test company (No.2 in test revenue). Provides wafer probing and final test mainly to fabless (80%+) and IDMs, using Advantest and Teradyne testers.

2449.TW Updated Jun 21, 2026

Annual return · 2026-06-18'21+26.7%'22-7.7%'23+132.4%'24+38.6%'25+171%YTD+4.2%

Money in ▸NVIDIA◐Revenue ~$1.1B Qualcomm◐MediaTek◐

King Yuan Electronics (KYEC)World’s largest pure-play test OSAT

▸ Money outAdvantest●Teradyne◐원재료·소재·R&D (비공개)○

Financials & Segments

Total revenue · World’s largest pure-play test OSAT
Segments · World’s largest pure-play test OSAT

Revenue from

NVIDIA Medium confidence· Revenue ~$1.1B · 2024 · annual revenue
Provides semiconductor test to NVIDIA.
Confirms KO ZDNet Korea Published Jun 1, 2025: "AI lifts second-tier OSAT (KYEC etc.)"
Confirms EN KYEC Published May 1, 2025: "Provides semiconductor test to NVIDIA."
Confirms EN Company IR / exchange filing Published Apr 1, 2025: "Annual report: revenue, customers, business."
Confirms EN Mordor Published Jan 1, 2025: "Provides semiconductor test to NVIDIA."
Qualcomm Medium confidence
Provides semiconductor test to Qualcomm.
Confirms EN KYEC Published May 1, 2025: "Provides semiconductor test to Qualcomm."
Confirms EN Mordor Published Jan 1, 2025: "Provides semiconductor test to Qualcomm."
MediaTek Medium confidence
Provides semiconductor test to 미디어텍.
Confirms EN KYEC Published May 1, 2025: "Provides semiconductor test to 미디어텍."
Confirms EN Mordor Published Jan 1, 2025: "Provides semiconductor test to 미디어텍."

Pays to

Advantest High confidence
Buys test equipment (ATE) from Advantest.
Confirms EN KYEC Published May 1, 2025: "Buys test equipment (ATE) from Advantest."
Confirms EN Mordor Published Jan 1, 2025: "Buys test equipment (ATE) from Advantest."
Teradyne Medium confidence
Buys test equipment (ATE) from Teradyne.
Confirms EN KYEC Published May 1, 2025: "Buys test equipment (ATE) from Teradyne."
Confirms EN Mordor Published Jan 1, 2025: "Buys test equipment (ATE) from Teradyne."
원재료·소재·R&D (비공개) Low confidence
Materials and R&D (undisclosed).
Confirms EN KYEC Published May 1, 2025: "Materials and R&D (undisclosed)."

Value-chain ripple (tiers 2–3)

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

Company	Chain	'21	'22	'23	'24	'25	YTD
Marvell	lead3	+84.9	-57.5	+63.7	+83.8	-22.8	+265.9
AMD	lead3	+56.9	-55	+127.6	-18.1	+77.3	+150.9
Broadcom	lead3	+56.8	-13.4	+104.9	+110.9	+50.7	+19.3
Apple	lead3	+34.6	-26.4	+49	+30.7	+9.1	+9.8
Samsung Electronics	lead2	-9	-14.2	+20.9	-26.4	+212.9	+121
CoreWeave	lead2	·	·	·	·	·	+64.7
Foxconn (Hon Hai)	lead2	-5.1	+2.8	+7.8	+80.1	+26.9	+21.8
Alphabet (Google)	lead2	+65.3	-39.1	+58.3	+35.8	+66.1	+17.8
Amazon	lead2	+2.4	-49.6	+80.9	+44.4	+5.2	+5.9
Super Micro	lead2	+38.8	+86.8	+246.2	+7.2	-4	+4.7
Meta Platforms	lead2	+23.1	-64.2	+194.1	+65.9	+13.1	-12.3
Microsoft	lead2	+52.5	-28	+58.2	+12.9	+15.6	-21.2
MediaTek	lead1	+27.8	-26.6	+49	+59.1	+25.1	+154.3
Qualcomm	lead1	+22.3	-38.4	+35.1	+7.7	+13.9	+34.2
NVIDIA	lead1	+125.5	-50.3	+239	+171.3	+38.9	+13.1
King Yuan Electronics (KYEC)	node	+26.7	-7.7	+132.4	+38.6	+171	+4.2
Teradyne	benef1	+36.8	-46.3	+24.8	+16.5	+54.4	+126.4
Advantest	benef1	+17	-2.3	+155.7	+49.5	+196	+24.6

YTD as of 2026-06-18 · source: Yahoo Finance

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