- China’s self-driving startup becomes Hong Kong’s first “physical AI” stock
- The IPO highlights a race between data-driven autonomy and robotaxi-first strategies
Chinese autonomous driving company Momenta (魔门塔) made its debut on the Hong Kong Stock Exchange on July 8, becoming the market’s first listed company associated with “physical AI” — a term increasingly used to describe AI systems that interact with the physical world.
The stock opened at HK$301 ($38.4), 1.8% above its IPO price of HK$295.6, and climbed as much as 6.5% during the session to HK$314.8 before paring gains to close at HK$300.6.
The company ended its first trading day with a market capitalization of about HK$70.3 billion.
Momenta raised about HK$5.66 billion from the offering of 19.94 million shares.
The IPO attracted strong investor demand, with the retail tranche oversubscribed by 414 times and international investors placing more than HK$100 billion in orders.
Fourteen cornerstone investors, including GIC Private Limited, Fidelity International, BlackRock, Mercedes-Benz Group and BYD, subscribed for about HK$3 billion worth of shares.
Based on Momenta’s closing price of HK$300.6, founder and CEO Cao Xudong’s 13.8% stake — disclosed in the company’s IPO prospectus — is now worth nearly HK$10 billion, making him one of the biggest individual beneficiaries of the listing.
A data-driven challenger
Momenta has built its business around a dual strategy: supplying advanced driver-assistance systems (ADAS) for mass-produced vehicles while developing autonomous taxi technology.
The company holds about 65% of China’s third-party urban navigation-assisted driving (NOA) market by vehicle sales, according to the company.
Its technology has expanded into more than 10 countries across Asia, Europe and Oceania, with customers including BMW, Audi, SAIC Motor and other global automakers.
Momenta reported revenue of 2.41 billion yuan ($335 million) in 2025, while gross margin jumped from 17.5% to 71.6%. Its systems have been installed in more than 1 million vehicles.
The company’s strategy differs from many autonomous driving startups that focus primarily on fully autonomous robotaxis.
Instead, Momenta uses mass-market vehicles as a source of real-world driving data, creating a feedback loop intended to improve algorithms and accelerate commercialization.
Momenta vs. Waymo: Two paths to autonomy
Momenta’s approach contrasts sharply with that of Waymo, one of the world’s leading robotaxi developers.
Waymo has pursued a more direct path toward Level 4 autonomy, operating its own robotaxi fleet and relying heavily on high-definition maps, simulation and extensive validation.
Momenta, by contrast, is betting that millions of consumer vehicles can generate the data needed to gradually advance autonomous capabilities.
The difference reflects two competing philosophies in autonomous driving: building a commercial business first and climbing toward higher autonomy, versus achieving full autonomy first and monetizing later.
Momenta’s mass-production model gives it access to a much larger pool of real-world driving data and deeper integration with traditional automakers.
Waymo, backed by Alphabet, has already achieved commercial robotaxi operations at scale, but with a business model requiring significant long-term investment.
What it means for global investors
Momenta’s listing comes as the global autonomous driving industry enters a new phase, with companies moving beyond technology demonstrations and focusing increasingly on commercial viability.
China’s autonomous driving sector has taken a different route from many US peers by leveraging the country’s enormous automotive manufacturing base and rapidly expanding electric vehicle market.
Partnerships with established automakers have allowed companies such as Momenta to deploy technology at scale while continuing to refine AI models.
However, the company still faces significant challenges, including competition from automakers developing their own autonomous systems, limited bargaining power as an algorithm supplier and accumulated net losses exceeding 9.2 billion yuan.
The broader question for the industry is whether the winning formula will come from a robotaxi-first approach like Waymo’s or a mass-deployment data strategy like Momenta’s.
The answer to that question could shape the future economics of autonomous mobility worldwide.
