--- title: "Sen. Tom Cotton asks Commerce to blacklist CXMT, which could cost Apple a memory supplier" description: "The Arkansas Republican's Entity List letter seeks the first rule that would actually stop U.S. firms from buying ChangXin's memory, something the administration has lacked since it objected in August. If it lands, Apple and European data centers lose their cheapest DRAM, and Micron, Samsung and SK Hynix keep the field." publisher: "The Inference" section: "Policy & Labor" published: 2026-11-12T14:09:27.158Z modified: 2026-11-12T14:09:27.158Z canonical: https://theinference.org/article/sen-tom-cotton-asks-commerce-to-blacklist-cxmt-which-could-cost-apple-a-memory-supplier language: en keywords: "CXMT, Micron, Apple, Export Controls, Memory" --- # Sen. Tom Cotton asks Commerce to blacklist CXMT, which could cost Apple a memory supplier > The Arkansas Republican's Entity List letter seeks the first rule that would actually stop U.S. firms from buying ChangXin's memory, something the administration has lacked since it objected in August. If it lands, Apple and European data centers lose their cheapest DRAM, and Micron, Samsung and SK Hynix keep the field. Sen. Tom Cotton of Arkansas asked Commerce Secretary Howard Lutnick today to put [ChangXin Memory Technologies](https://theinference.org/markets/companies/cxmt) on the department's Entity List, the blacklist that bars U.S. companies from doing business with a firm and cuts it off from American technology [1]. [The letter](https://www.cnbc.com/2026/11/12/lutnick-cxmt-china-cotton.html) aims at the ladder CXMT is actually climbing: AI-server memory built from ordinary chips, not the high-bandwidth memory it still cannot make at yield. ## CXMT found a way into AI servers that skips HBM The company, China's largest maker of DRAM, the workhorse memory in computers and phones, told the Chinese business outlet Blue Whale Finance this week that its DDR5 dies have reached 32 gigabits and that its top server module claims the highest speed class of the MRDIMM standard [2]. MRDIMM is the side door: a small controller chip drives banks of ordinary DDR5 fast enough for AI servers, replacing the vertical die-stacking that defines high-bandwidth memory, or HBM [2]. That stacking is exactly where CXMT fails. [Reuters reports its first HBM, called HBM3E, enters limited production within two months](https://www.msn.com/en-us/technology/hardware-and-devices/exclusive-china-s-cxmt-to-start-advanced-ai-memory-production-despite-poor-yields-sources-say/ar-AA2gf3sK) at yields of 20 to 30 percent [3]. [SK Hynix](https://theinference.org/markets/companies/sk-hynix), the market leader, runs near 70 [3]. MRDIMM lets CXMT sell into AI-server demand with the commodity dies it already makes well. ## Washington has an opinion about Chinese memory. It still has no rule Lutnick said in August that the administration is "not in favor" of [Apple](https://theinference.org/markets/companies/apple) buying Chinese memory and had told the company so plainly [5]. But commodity parts bought off the shelf need no export license, which is why [HP](https://theinference.org/markets/companies/hp) and Acer already ship CXMT memory in products sold outside the U.S., and why Apple, reported in August to be [weighing CXMT for iPhones and Macs](https://theinference.org/article/apple-s-new-ceo-keeps-chinese-dram-on-the-table-as-cxmt-posts-a-sevenfold-quarter) during the AI-driven shortage, stayed free to sign [5][1]. An opinion was never going to stop a purchase. Only the Entity List does that, and Apple's early-summer request for assurance that CXMT would stay off the list already got its answer: no [5]. [Micron](https://theinference.org/markets/companies/micron) lobbied for exactly this outcome, with about $250 billion of U.S. expansion behind it [5]. ## Apple and European buyers would pay; the HBM three are protected If the listing lands, Apple loses a supplier it has been testing, and the European data centers [Citi](https://theinference.org/markets/companies/citigroup) calls the realistic channel for CXMT's server memory lose the cheap option [5][2]. Micron, Samsung and SK Hynix, the only three HBM makers, keep the commodity field to themselves [1]. *Chart: **Micron's quarterly revenue rose sevenfold as the memory shortage ran** Line chart of Micron's quarterly revenue from the quarter ended August 2024 to the quarter ended September 2026, rising from $7.75 billion to $54.2 billion, with gross margin climbing over the same span.* *Micron revenue by fiscal quarter, from its SEC filings; gross margin rose from 35.3 percent to 86.8 percent over the same nine quarters. Source: Micron filings, retrieved 12 November 2026. [8]* ## The threat the market keeps repricing arrives slowly October's global memory rout was set off by a CXMT roadmap with no specifications and no qualified customer [7], and it priced the wrong end of the company. CXMT's slice of world DRAM revenue more than doubled in a year before slipping back last quarter as Samsung ramped [1][2], a climb we charted [when the third-quarter numbers landed](https://theinference.org/article/micron-s-chinese-rival-cxmt-held-9-of-world-dram-revenue-in-q3-down-from-10-and-does-not-yet-sell-hbm4). The cash underneath did not slip: $8.1 billion of [third-quarter profit](https://www.msn.com/en-us/news/other/cxmt-turns-third-quarter-net-profit-of-544-billion-yuan/ar-AA2gpl4X), earned on the shortage [4]. *Chart: **CXMT's share of world DRAM revenue more than doubled in a year, then slipped** Column chart of CXMT's quarterly share of world DRAM revenue: 4 percent in Q2 2025, 8 percent in Q1 2026, 10 percent in Q2 2026 and 9 percent in Q3 2026.* *Counterpoint Research estimates of quarterly DRAM revenue share, as cited by CNBC, FinanceFeeds and Ainvest. [1][2][7]* If Lutnick writes the rule, the moat holds and buyers outside it pay more for every AI server they build. If he does not, CXMT keeps climbing on shortage profits. Micron, the only U.S.-listed memory pure-play, closed near $811 today; [BofA](https://theinference.org/markets/companies/bank-of-america)'s October target is $1,550 [2]. The fight is not in high-bandwidth memory yet. It is in the commodity memory that pays for it. ## Takeaway Cotton's Entity List letter would be the first rule that actually stops U.S. firms from buying Chinese DRAM. If Commerce writes it, Apple and European data centers pay more for AI servers and the HBM three keep the commodity field to themselves. ## Sources 1. [CNBC, "Lutnick should ban Chinese memory maker CXMT from U.S., Sen. Cotton says," 12 November 2026](https://www.cnbc.com/2026/11/12/lutnick-cxmt-china-cotton.html) 2. [Ainvest, "You Can't Buy CXMT, the Chinese Memory Maker That Just Matched Micron's Fastest Server-Memory Class," 12 November 2026](https://www.ainvest.com/news/buy-cxmt-chinese-memory-maker-matched-micron-fastest-server-memory-class-threat-poses-slower-october-panic-2611/) 3. [Reuters (via MSN), "Exclusive: China's CXMT to start advanced AI memory production despite poor yields, sources say," 28 October 2026](https://www.msn.com/en-us/technology/hardware-and-devices/exclusive-china-s-cxmt-to-start-advanced-ai-memory-production-despite-poor-yields-sources-say/ar-AA2gf3sK) 4. [Reuters (via MSN), "CXMT turns third-quarter net profit of 54.4 billion yuan," 30 October 2026](https://www.msn.com/en-us/news/other/cxmt-turns-third-quarter-net-profit-of-544-billion-yuan/ar-AA2gpl4X) 5. [The Next Web, "The US told Apple not to buy Chinese memory chips. It has no rule that stops it," 15 August 2026](https://thenextweb.com/news/lutnick-apple-chinese-memory-chips-cxmt-ymtc) 7. [FinanceFeeds, "Samsung Stock at 232,000 Won After China's CXMT 4F2 DRAM Claim: Bull and Bear Case," 13 October 2026](https://financefeeds.com/samsung-stock-232000-won-cxmt-4f2-dram-kospi-sidecar-bull-285500-bear-215000/) 8. [Micron, quarterly figures from its SEC filings, retrieved 12 November 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000723125) --- Sen. Tom Cotton asks Commerce to blacklist CXMT, which could cost Apple a memory supplier — The Inference. Canonical: https://theinference.org/article/sen-tom-cotton-asks-commerce-to-blacklist-cxmt-which-could-cost-apple-a-memory-supplier