Amicro Technology, a robotics chip designer partly owned by a Xiaomi-managed fund, opened at HK$13.62 in its Hong Kong debut on 12 November, 37.6% above its HK$9.90 offer price, by our arithmetic. That valued all its shares at about HK$5.9 billion. Memory-product maker HOSIN Electronics, which listed the same morning, opened at HK$72.80, three cents below its HK$72.83 offer price.
By 09:42 Hong Kong time, HKEX quotes showed Amicro at HK$17.13, up 73.0% from its offer price, and Hosin at HK$73.10, up 0.4%, by our arithmetic. A Reuters headline published around the open said the two chip firms were set to open mixed.
Business Pill · Concentration Explained
A short explainer on concentration: when a few big pieces make the total. It teaches the general idea only and does not discuss Amicro or Hosin.
The key insight: The loss-maker opened higher than the profit-maker: Amicro, which lost RMB155.1 million in 2025, opened 37.6% above its offer price, while Hosin, whose four-month profit rose 31.2 times, opened three cents below, by our arithmetic. Retail subscription was 13.95 times for Amicro against 2.37 times for Hosin.
Amicro’s Hong Kong public offer was 13.95 times subscribed, which triggered a claw-back that doubled the retail tranche, while its international offering was 1.05 times subscribed. It priced at HK$9.90, below the HK$10.43 mid-point of its HK$9.27 to HK$11.58 range, and raised HK$709.70 million gross.
Hosin’s public offer was 2.37 times subscribed and its international offering 1.45 times. It priced at HK$72.83, near the bottom of its HK$72.29 to HK$82.90 range, and raised HK$1,071.9 million gross. By our arithmetic, Amicro’s retail book was 5.9 times as oversubscribed as Hosin’s.
Hosin has a stabilizing manager, China Securities (International) Corporate Finance, which may support the price until 9 December, and 2,207,500 shares were over-allocated. Amicro’s announcement states that no stabilizing manager will be appointed. Both announcements warn that, with shares held by a small number of holders, the price “could move substantially even with a small number of Shares traded”.
Change from each company’s final offer price (HKEX allotment results, 11 November 2026) to HKEX’s delayed quote at 09:42 Hong Kong time on 12 November; intraday, not the close. Percentages are our arithmetic.
Amicro: Robot Chips, Still Losing Money
Amicro says it was “the first company to launch a dedicated SLAM SoC for real-time localization and mapping globally”, the chip a robot vacuum uses to map a room. Its end customers include Xiaomi, iRobot, Ecovacs, UBTech, Haier and Midea, and it delivered over 3.5 million sets of robotic solutions in 2025, its prospectus says.
Revenue rose from RMB206.0 million in 2023 to RMB406.7 million in 2025, up 97.4% by our arithmetic. It lost RMB155.1 million in 2025 and RMB66.7 million in the four months to April 2026, and says it expects a net loss for 2026. About 70% of the net proceeds are earmarked for robot-dedicated AI chips, software and hardware with a focus on embodied intelligence.
The Xiaomi link is a fund: Xiaomi Changjiang holds 12,849,791 shares, or 2.98%, locked up until 11 November 2027. Its general partner is indirectly 80% held by Xiaomi Corporation, which also owns about 19.6% of the fund, the prospectus says. A Xiaomi subsidiary, Customer K, is also one of Amicro’s five largest customers. At HK$17.13, the fund’s stake was worth about HK$220.1 million, against HK$127.2 million at the offer price, by our arithmetic.
Hosin: Memory Profits Up 31 Times
Hosin designs memory products and outsources wafer making and packaging; it sells embedded storage, SSDs, DRAM and memory chips. It says it ranked 12th among global memory product companies in 2025 with a 0.6% share, citing Frost & Sullivan.
Its prospectus shows a turn from a RMB117.5 million loss in 2023 to a RMB1,363.9 million profit in 2025, and net profit of RMB3,840.6 million in the four months to April 2026, against RMB123.1 million a year earlier. That is 31.2 times, by our arithmetic. Across the industry, DRAM revenue rose 369% to nearly $200 billion, as we reported.
At HK$73.10, Hosin’s 275,231,500 H shares were worth about HK$20.1 billion, matching HKEX’s figure, and all 482,531,284 issued shares about HK$35.3 billion, by our arithmetic. Its cornerstone placees include phone maker Transsion and memory company Longsys.
The Structural Read
As we read the two books, retail investors priced Amicro as a robotics option and Hosin as a memory-cycle stock, even though Hosin’s filing shows far larger profits.
As we read the Xiaomi link, it runs both ways: a Xiaomi-managed fund owns 2.98% and a Xiaomi subsidiary is among the top five customers, so the investor is also a buyer.
Amicro Technology prospectus, 31 Oct 2026
“In 2025, we delivered over 3.5 million sets of intelligent mobile robotic solutions”
Three Implications
FOR AMICRO It priced at HK$9.90 and raised HK$709.70 million gross; it expects a net loss for 2026, its prospectus says.
FOR HOSIN It raised HK$1,071.9 million gross at HK$72.83, near the bottom of its range, with a stabilizing manager in place until 9 December.
FOR XIAOMI Its fund’s 2.98% stake was worth about HK$220.1 million at 09:42, against HK$127.2 million at the offer price, by our arithmetic; it is locked up until 11 November 2027.
The framework reads: “We are entering a phase where four scaling laws are simultaneously shaping the AI ecosystem, while several converging forces are radically transforming the physical layers underpinning AI itself.”
As we read it, the two debuts sit in two of those physical layers, memory and the chips that let robots act, and the first-day prices show investors valuing them very differently. The framework predates the listings and does not discuss them.
Subscription levels from each company’s HKEX allotment-results announcement, 11 November 2026. The ratio is our arithmetic.
What Is Not Established
These are opening and early-morning prices, not closing prices; first-day moves can reverse by the close. HKEX quotes are delayed. Neither filing explains why the two books drew such different retail demand. Amicro’s market value here counts all its issued shares; Hosin’s full figure includes shares that are not H shares. We did not contact either company for this piece.
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Two Chinese chip firms listed in Hong Kong on the same morning. Amicro, the loss-making, Xiaomi-backed robot chip designer, opened 37.6% above its offer and was up 73.0% by 09:42; Hosin, the memory maker whose four-month profit rose 31.2 times, opened three cents below its offer price, by our arithmetic.
A note on sourcing. We read both companies’ HKEX announcements of final offer prices and allotment results, published on 11 November 2026, and the relevant sections of their prospectuses (Amicro’s dated 31 October and Hosin’s dated 30 October 2026). Opening and 09:42 prices and HKEX’s market-value figures come from HKEX’s delayed quote pages on 12 November 2026. Percentage moves, market values, the Xiaomi fund’s stake value and the growth multiples are our arithmetic. Reuters’ report is cited by its headline only. We did not contact Amicro or Hosin for this piece.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
