A company that makes the brains inside self-driving cars arrived on the Hong Kong exchange with a rulebook written specifically for it. The welcome was cold: the stock opened a third below its offer price and never recovered on day one. For every celebration of a new listing pathway, there is a first trade that reminds investors what "pre-profit" actually means.
Key takeaways
- Black Sesame (黑芝麻智能), an autonomous-driving chip designer, raised about HK$1.04 billion (US$133 million / RMB 948 million) in its Hong Kong IPO on 8 August 2024.
- Shares were priced at HK$28.00 and closed the first day at HK$20.45, down 26.96%, with an opening print of HK$18.80, down 32.9%.
- The deal was only the second listing under HKEX's Chapter 18C for pre-revenue specialist technology firms, after QuantumPharm (晶泰科技) in June 2024.
- Net proceeds of roughly HK$951 million (US$122 million / RMB 870 million) were directed mostly to automotive system-on-chip R&D over five years.
- The debut underscored that a purpose-built listing route does not guarantee demand for companies without earnings.
A rule built for this exact company
Hong Kong introduced Chapter 18C in March 2023 to let commercializing-but-unprofitable technology firms list without the traditional profit track record. Black Sesame, founded in 2016 by Shan Jizhang (单记章) and Liu Weihong (刘卫红), both Tsinghua alumni, was an obvious candidate: a designer of automotive-grade system-on-chip (车规级SoC) products for advanced driver assistance and smart cockpits.
It became the second issuer under the chapter, following drug-discovery firm QuantumPharm. Black Sesame's pitch was scale — it claimed to be among the top three global suppliers of high-compute automotive SoCs by 2023 shipment volume — and a customer base that included major Chinese carmakers and electronics groups.
The numbers on the page
The company offered 37,000,000 shares at HK$28.00 each, for gross proceeds of about HK$1.04 billion. After expenses, net proceeds came to roughly HK$951 million. The structure was typical: about 80% of net proceeds earmarked for R&D over five years, with the remainder split between commercialization and working capital.
Founded in 2016, Black Sesame had completed roughly ten private rounds before listing, backed by groups including Xiaomi (小米), NIO Capital (蔚来资本), Tencent, and SAIC. Those stakes rolled into a public market that, on day one, was unconvinced.
The product story centered on two chip families: the Huashan (华山) series for high-compute autonomous driving and the Wudang (武当) series for cross-domain cockpit-and-driving integration. Both target the automotive-grade reliability that mass-production carmakers require, a far higher bar than consumer electronics and a key reason the R&D runway had to be long.
Why the market flinched
The first-day drop to a HK$11.64 billion market capitalization was not a verdict on the technology alone. It reflected three pressures: the company was still loss-making with widening losses, the autonomous-driving chip space was crowded with both global and domestic rivals, and Hong Kong's 18C debuts had already shown weak aftermarket support.
Investors also had to weigh dilution risk. A pre-profit issuer that needs years of R&D spend before meaningful royalty income is, by construction, a repeated visitor to capital markets. The debut price implied the market wanted a larger margin of safety than the offer provided.
What Chapter 18C actually changes
The chapter's value is optionality, not a guarantee. It lets firms like Black Sesame access public equity earlier, which can fund the long climb from tape-out to volume production. But it shifts the burden of proof onto secondary-market buyers, who must underwrite uncertain timelines without the cushion of current earnings.
For issuers, the lesson from this debut is that a tailor-made rule lowers the listing bar, not the valuation bar. Pricing still has to clear a skeptical book.
What the debut signals for Hong Kong's tech ambitions
Black Sesame's cold welcome is not an argument against Chapter 18C but a reminder of what the venue was built to absorb. Hong Kong designed the route to capture Chinese technology champions that could not list elsewhere because they lacked earnings — firms whose value lies years out, not in last quarter's numbers. A weak first trade tests whether the exchange can build genuine aftermarket demand for such names, or whether it mainly supplies a fundraising door that public investors are reluctant to walk through.
The episode also reframes how investors should read the broader auto-chip and autonomous-driving complex. A purpose-built listing path does not insulate a company from the harder question of whether its technology will reach volume production before cash runs out. For Hong Kong, the credibility of 18C now rests less on how many firms it admits than on whether those firms can eventually stand on their own earnings rather than on repeated trips back to the market for more capital.
Honest limitations
Figures are drawn from the company's HKEX listing announcements and Chinese financial press; the first-day prices and market capitalization are exchange-reported. The "top three by 2023 shipments" claim is the company's own stated positioning and is not independently verified here. Loss trends and R&D allocation percentages come from the prospectus and may be restated. Currency conversions use approximate rates (US$1 ≈ HK$7.78, RMB 1 ≈ HK$1.09) and are rounded; they are indicative, not audited. The "second 18C listing" sequencing reflects publicly reported listing dates and could be affected by withdrawn or deferred applications.
What readers can do now
- Judge 18C listings on post-lock-up price stability, not debut pop, since pre-profit issuers often return to market for more capital.
- Compare Black Sesame's design wins and shipment growth against global automotive-chip peers before assuming the discount is purely sentiment.