The Week MediaTek Took 'Triggerfish' Alone — Taiwan Became Google's Inference ASIC Architect

The real center of Taiwan's chip story this week isn't TSMC's new high — it's Ming-Chi Kuo's June 22 note that MediaTek (2454) has exclusively secured the design of Google's next-gen TPU v9 derivative, codenamed Triggerfish (cnyes). The chip is an inference-focused variant of the v9 family, succeeding the prior 'Humuf' derivative. The weight rests on a single word — exclusive.

Broadcom has been Google's traditional design partner on the TPU training line. Against that backdrop, MediaTek emerging as the sole design house on the inference variant is not just a new revenue line. It is the first time a Taiwanese fabless has taken a US hyperscaler's ASIC architecture seat without splitting it. The company that competes with Qualcomm in mobile via Dimensity now draws the chip Google plugs into its own data centers. Inference is the faster-growing half of the TPU TAM, and a single design-in compounds into MediaTek's revenue across the entire chip lifecycle.

Read this as Taiwan moving up the value chain, not sideways. In the same week, Marvell publicly confirmed it is engaging TSMC's A14 process — the 2028 mass-production node — for its next-gen AI data center connectivity chips (cnyes, June 21). A14 was previously assumed to be Nvidia / Apple / AMD territory. Marvell joining that list, alongside MediaTek's exclusive Google ASIC win, draws one arrow: Taiwan design houses are climbing into hyperscaler ASIC architecture.

The market repriced immediately. On June 22, TAIEX surged 1,276.31 points (+2.75%) to a record 47,741.51 on NT$1.44T turnover — the 7th-largest point gain in history (cnyes). TSMC (2330) hit NT$2,510 with market cap reaching NT$65.09T (~$2.1T). ASE (3711) closed limit-up at NT$674, vaulting past a NT$3T (~$94B) market cap. UMC (2303) and Nanya Technology (2408) also went limit-up (cnyes). ASE joining the NT$3T club in a single session signals this rally is no longer a TSMC-only story. Aspeed (5274) closed near NT$19,880, approaching the NT$20,000 milestone (cnyes, June 22).

The fundamental anchor moved in parallel. Goldman Sachs on June 22 raised its 2026 EPS growth forecast for MSCI Taiwan to 48% (consensus 41%) and 2027 to 30% (consensus 25%) — a ~7pp positive gap to consensus (cnyes). That gap is not momentum; it is the start of a structural earnings-revision cycle, with Goldman pricing ahead of consensus after AI infra → packaging/substrate → ASIC design → earnings worked its way up the stack. In the same week, FactSet lifted Nanya Tech's 2026 EPS to NT$50.95 (from NT$49.05), Novatek to NT$30.07 (from NT$29.64), and Silergy to NT$10.27 (from NT$10.2) (cnyes). The revision is not single-stock — it is spreading across design, analog, and memory at once.

The final piece is the Vera Rubin supplier list that crystallized this week. Foxconn (Hon Hai) disclosed that 1GW of Vera Rubin buildout costs ~NT$1.5T, with NT$41B annual power (Google News, June 21). Unimicron (3037) committed ~NT$14B in new capex targeting 45% share of Vera Rubin ABF substrate orders (Google News). Add Feng-Ching for 800V HVDC power cabling, Browave (3163) for 800G fiber shuffle kits in the CPO ecosystem, and an unnamed Taiwanese NOR Flash supplier slotted in as boot/code memory on the Vera Rubin BOM (cnyes / Google News). A June 19 feature noted that ~70% of attendees at Jensen Huang's Taiwan supplier dinner have production in Taoyuan — the AI hardware cluster has condensed geographically as well as in name (technews).

Taiwan's new vertical is explicit. (1) MediaTek and Marvell occupy ASIC design; (2) TSMC A14 holds advanced foundry; (3) Unimicron, Browave and Feng-Ching cover packaging, optical and power; (4) Foxconn handles system integration. This is the first week all four layers were named, on the same single platform (Vera Rubin + Google TPU v9), in plain text.

Fault lines exist. Schroders and other foreign brokers on June 21 flagged three correction signals in Taiwan equities: (1) rapid margin-debt expansion, (2) fading leadership in high-priced and large-cap names, and (3) heavy dependence on the July TSMC call for full-year guidance (cnyes). Separately on June 22, Taiwan's MOEA confirmed the 3-year 50% water-fee discount expires after FY2025, with full-rate billing hitting 1,300 heavy users — foundries included — from 2026 (cnyes). Layered onto a DDR5 16Gb spot of $46.167 (June 22), the cost side has not gone away.

Positioning. This week's signal compresses into one MediaTek line: Google trusts a Taiwanese design house as the sole architect of its inference TPU. That alone justifies a multiple re-rating for a name the market still prices as a mobile SoC company. The Taiwan-design → TSMC-foundry → Taiwan-packaging/substrate/optical → Foxconn-assembly full-stack vertical got formalized this week in named, sourced bills of materials. July's TSMC call is the next hinge — either consensus catches up to Goldman, or Schroders' three warning lines pull it back.

Key Sources: - MediaTek wins exclusive order for Google TPU v9 'Triggerfish' inference chip (cnyes, 2026-06-22) - Goldman lifts MSCI Taiwan 2026 EPS growth to 48%; TSMC tops NT$2,500 (cnyes, 2026-06-22) - Unimicron Plans NT$14B Expansion on Vera Rubin Orders, Targets 45% Share (Google News, 2026-06-22) - Marvell in talks with TSMC to adopt A14 process for next-gen flagship chips (cnyes, 2026-06-21) - Taiwan Ends Water-Fee Discount: 1,300 Heavy Users Including Foundries Hit Full Rate in 2026 (cnyes, 2026-06-22) - plus 3 more