--- title: "Advantest and Teradyne Test the World's AI Memory. Three Rivals Just Tested Them." description: "Advantest holds more than half the world's memory-test market and closed at a record ¥41,850 on October 6, 22 days before its October 28 results; Teradyne prints a day earlier. In ten days, three challengers moved on the moat both are priced on." publisher: "The Inference" section: "Hardware" published: 2026-10-09T00:28:34.182Z modified: 2026-10-09T00:28:34.182Z canonical: https://theinference.org/article/advantest-and-teradyne-test-the-world-s-ai-memory-three-rivals-just-tested-them language: en keywords: "Semiconductors, Memory, AI Hardware, Earnings, Chip Equipment" --- # Advantest and Teradyne Test the World's AI Memory. Three Rivals Just Tested Them. > Advantest holds more than half the world's memory-test market and closed at a record ¥41,850 on October 6, 22 days before its October 28 results; Teradyne prints a day earlier. In ten days, three challengers moved on the moat both are priced on. ## Two landlords, one toll road The HBM stacked beside [Nvidia](https://theinference.org/markets/companies/nvidia)'s AI accelerators gets tested, mostly, on machines from two companies. [Advantest](https://theinference.org/markets/companies/advantest) holds [more than half the global memory-test equipment market](https://www.trendforce.com/news/2026/10/05/news-ai-hbm-drive-memory-testing-demand-how-chinas-suppliers-are-challenging-an-80-import-market/) [1] and closed at a record ¥41,850 on October 6 [2], a ¥30.3 trillion market cap [3]. [Teradyne](https://theinference.org/markets/companies/teradyne), at roughly 30% of server-memory testing, jumped 8.00% to $449.04 on October 2 [4][1]. Advantest helped drag the Nikkei 225 to its first close above 70,000 in three months; its 12.2% index weighting had already breached the 10% cap and was trimmed on October 1 [2]. ## What the record prices are buying Advantest's V93000 HS2 tests multi-stack HBM in parallel, 40% more efficiently than the industry average, for Samsung, [SK hynix](https://theinference.org/markets/companies/sk-hynix) and [Micron](https://theinference.org/markets/companies/micron) [1]. Its June quarter delivered record sales of ¥367.5 billion, up 39%, and record operating profit of ¥190 billion, on a full-year plan of ¥1.714 trillion in sales, up 51% [3]. Teradyne's [memory revenue hit a record $212 million](https://marketiv.app/news/teradyne-launches-magnum-e2-memory-tester-as-memory-revenue-hits-record-212-mill-02102026), a third straight quarter above $200 million, with book-to-bill above 2: more than two dollars of memory orders for every dollar shipped [4]. [Total revenue doubled to $1.33 billion](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000097210) [4][5]. *Chart: **Teradyne's quarterly revenue doubled in a year on AI memory test** Line chart of Teradyne quarterly revenue from Q3 2023 to Q2 2026 showing a doubling to $1.33 billion* *Quarterly revenue in USD billions, calendar-labeled fiscal quarters, from Teradyne's SEC filings. The June 2026 quarter rose 103.9% year over year. [4][5]* ## Three fronts in ten days Teradyne [announced the Magnum E2 on September 29](https://www.teradyne.com/company/newsroom/), aimed at LPDDR6, DDR6, GDDR7 and NAND [6][4], a frontal push into memory test at the heart of Advantest's franchise. SK hynix's disclosed HBM4 wafer-tester orders this year, KRW 283.94 billion of them, went to Korean specialists Digital Frontier (KRW 232.1 billion) and UniTest (KRW 51.84 billion), not the incumbents [1]. China's TBSTest, the third supplier on earth able to serve both chip-probe and final-test ATE in volume DRAM after the two incumbents, booked more than 300 systems in a year and is expected to reach nearly 15% of China's memory ATE market in 2026 [1]. Imports still make up more than 80% of China's installed test base, so the local climb has room [1]. *Chart: **SK hynix's HBM4 tester orders went to two Korean specialists, not the incumbents** Column chart of SK hynix's disclosed HBM4 wafer-tester orders by supplier, showing Digital Frontier taking most of the total* *SK hynix's disclosed HBM4 wafer-tester orders for 2026, KRW billions, by supplier, from TrendForce. The combined total is KRW 283.94 billion; neither Advantest nor Teradyne appears among the disclosed winners. [1]* ## The bull's answer, and who is exposed HBM4 needs more items tested, for longer, and memory makers are shifting to dedicated testers from this generation on; tester demand can grow faster than HBM output itself [1]. Citi expects HBM4 prices to rise 100% to 150% next year [7]. A pie growing that fast can feed three new bakers and still fatten the incumbents. The exposure runs one way: memory makers gain a second source of testers [1], Digital Frontier, UniTest and TBSTest take the flow, and holders of both incumbents at record share prices carry the risk into the prints. ## The prints decide Teradyne reports on October 27 with its [$396.80 average analyst target sitting 11.63% below the price](https://www.ad-hoc-news.de/boerse/news/corporate-news/teradyne-stock-gained-8-00-percent-on-october-2-on-ai-demand/70227737) [4]. Advantest follows on the 28th [9][3] and has already slipped below its own consensus: ¥40,930 on October 8 against [a 21-analyst average of ¥42,686](https://www.ad-hoc-news.de/boerse/news/corporate-news/advantest-stock-keeps-buy-rating-with-jpy-47-000-target/70263583) [8][9], with Jefferies at ¥41,000 and Iwai Cosmo's ¥47,000 the outlier [3][8]. Same 48 hours, different downside: the market has started discounting Advantest's premium while still paying up for Teradyne. The premium survives if memory orders keep outrunning share loss. One wobbled guide, one customer that walks, and the toll road gets its first bypass. *Chart: **Advantest's close already sits below its analysts' average target** Bar chart comparing Advantest analyst price targets against the October 8 share price* *Twelve-month price targets and the October 8, 2026, close, JPY per share. Iwai Cosmo and Jefferies are individual broker targets; the average spans 21 analysts. [3][8]* ## Takeaway Advantest and Teradyne price in an unchallenged memory-test duopoly, but in ten days Teradyne pushed into Advantest's core with the Magnum E2, SK hynix's HBM4 tester orders went to two Korean specialists, and China's TBSTest neared 15% of its home market; the October 27 and 28 prints now decide whether the premium survives. ## Sources 1. [TrendForce, "AI, HBM Drive Memory Testing Demand: How China's Suppliers Are Challenging an 80%-Import Market", 5 October 2026](https://www.trendforce.com/news/2026/10/05/news-ai-hbm-drive-memory-testing-demand-how-chinas-suppliers-are-challenging-an-80-import-market/) 2. [BBN Times, "Nikkei 225 Closes Above 70,000 at 70,683.98 as Advantest Hits a Record", 7 October 2026](https://www.bbntimes.com/global-economy/nikkei-225-closes-above-70-000-at-70-683-98-up-1-05-to-a-three-month-high-as-advantest-hits-a-record) 3. [AD HOC NEWS, "Advantest stock gains 3.85 percent ahead of October 28 results", 6 October 2026](https://www.ad-hoc-news.de/boerse/news/corporate-news/advantest-stock-gains-3-85-percent-ahead-of-october-28-results/70241994) 4. [AD HOC NEWS, "Teradyne stock gained 8.00 percent on October 2 on AI demand", 2 October 2026](https://www.ad-hoc-news.de/boerse/news/corporate-news/teradyne-stock-gained-8-00-percent-on-october-2-on-ai-demand/70227737) 5. [Teradyne, quarterly figures from its SEC filings, retrieved 8 October 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000097210) 6. [Teradyne Newsroom, "Teradyne Announces Magnum E2 to Address Next-Generation Memory Test Demands Driven by AI and High-Performance Computing", 29 September 2026](https://www.teradyne.com/company/newsroom/) 7. [MarketIV, "Teradyne Launches Magnum E2 Memory Tester as Memory Revenue Hits Record $212 Million", 2 October 2026](https://marketiv.app/news/teradyne-launches-magnum-e2-memory-tester-as-memory-revenue-hits-record-212-mill-02102026) 8. [AD HOC NEWS, "Advantest stock keeps Buy rating with JPY 47,000 target", 8 October 2026](https://www.ad-hoc-news.de/boerse/news/corporate-news/advantest-stock-keeps-buy-rating-with-jpy-47-000-target/70263583) 9. [Advantest Corporation, Investors (IR calendar and share price), accessed 8 October 2026](https://www.advantest.com/en/investors/) --- Advantest and Teradyne Test the World's AI Memory. Three Rivals Just Tested Them. — The Inference. Canonical: https://theinference.org/article/advantest-and-teradyne-test-the-world-s-ai-memory-three-rivals-just-tested-them