Zhongji Innolight Comes to Hong Kong: The Company Connecting Every Major AI Data Centre in the World

Zhongji Innolight will list on the Main Board of the Hong Kong Stock Exchange on 30 July 2026 under stock code 3308, in what is set to be Hong Kong’s largest IPO since Alibaba’s 2019 debut. Here is what the company does, why it sits at the centre of the global AI infrastructure buildout, and how investors can gain access.

What Zhongji Innolight Does

Inside every major AI data centre on the planet, tens of thousands of servers need to talk to each other at extraordinary speed. The chips processing AI workloads – Nvidia’s Blackwell GPUs, Google’s TPUs, Amazon’s Trainium – generated data faster than conventional copper wiring can carry it.

The solution is light. Optical transceivers convert electrical signals into pulses of light and transmit them through fibre optic cables between servers, switches and GPU racks.

One company makes more of these transceivers than any other in the world. Until 30 July 2026, most investors outside mainland China could not easily buy it.

Zhongji Innolight Co., Ltd. will list H-shares on the Main Board of the Hong Kong Stock Exchange on 30 July 2026 under stock code 3308. The global offering comprises 54.5 million H-shares at a maximum offer price of HK$1,010 per share, with market reports as of 27 July indicating final pricing at approximately HK$980 per share, to be confirmed on 29 July.

At the maximum price, the deal targets approximately HK$55 billion ($7 billion), rising to HK$63.3 billion ($8.1 billion) if the 15% over-allotment option is exercised in full. That makes it Hong Kong’s largest listing since Alibaba’s $12.9 billion offering in 2019, and the city’s largest of 2026, surpassing Luxshare Precision’s $3.1 billion deal earlier this month.

Joint sponsors are Goldman Sachs, CICC, Morgan Stanley and GF Securities.

The listing takes the form of an A+H share arrangement alongside the existing Shenzhen ChiNext listing under ticker 300308.SZ. The offering has attracted 33 cornerstone investors committing $3.45 billion, equal to approximately 49.1% of the base offering, subject to a six-month lockup.

They include Temasek, Abu Dhabi Investment Authority, BlackRock, JPMorgan Asset Management, Hillhouse-linked HHLR Advisors, Wellington Management, Bain Capital, Alibaba and Tencent.

Why Optical Transceivers Are the Quiet Bottleneck of the AI Era

A single Nvidia GB200 NVL72 server rack requires thousands of high-speed optical connections to function. When hyperscalers build clusters of hundreds of thousands of GPUs, the physical capacity to move data between processors becomes as critical as the compute itself.

Zhongji Innolight produces optical transceivers from 100G to 1.6T, with its product mix having shifted decisively toward 800G and 1.6T over the past two years.

The company was the first to achieve mass production and delivery of both 800G and 1.6T modules at scale simultaneously. Passing hyperscaler qualification typically takes two to three years, creating a first-mover barrier competitors cannot close quickly.

According to China Insights Consultancy data cited in the company’s HKEX prospectus, Zhongji Innolight has ranked first globally in optical interconnect solutions revenue for five consecutive years since 2021, with a 21.2% global market share in 2025.

In the technically more demanding high-speed datacom segment, its share rose to 28.1%.

The Business: One Product, Extraordinary Economics

Optical communication transceiver modules generated approximately 37.46 billion yuan in 2025, representing 97.95% of total revenue. The financial profile is striking.

Full-year 2025 revenue reached 38.24 billion yuan (approximately $5.6 billion), up 60.3% year on year.

Net profit attributable to shareholders reached 11.58 billion yuan (approximately $1.7 billion), up 116% year on year, per the HKEX prospectus.

Gross margin on transceiver modules expanded to 42.61%, improving nearly 8 percentage points versus 2024.

In a business where rising volumes typically compress margins, Zhongji Innolight achieved both volume and price growth simultaneously, driven by the rapid shift toward higher-value 800G and 1.6T products.

Momentum has accelerated further in 2026. Q1 revenue reached 19.5 billion yuan (approximately $2.9 billion), up 192% year on year and up nearly 50% quarter on quarter.

Net profit attributable to shareholders reached 5.74 billion yuan (approximately $848 million), up 262% year on year. Gross margin hit 46%, a company record.

Q1 2026 net profit alone already exceeded the company’s entire full-year 2024 net profit in a single quarter.

Revenue Growth

The Customers: The Entire AI Infrastructure Stack

According to Bloomberg data, Alphabet accounts for approximately 22% of revenue, Amazon for 11% and Meta for 6.4%.

The top five customers account for 75.98% of total revenue. Overseas revenue accounted for 90.58% of total revenue in 2025, with the United States alone representing 61.7% of Q1 2026 revenue, per the company’s draft prospectus.

The relationship with Nvidia is particularly deep. Zhongji Innolight’s 800G modules account for over 50% of Nvidia’s GB200 optical module requirements.

TrendForce estimates the company will capture approximately 80% of Google’s orders for modules above 800G in 2026, driven by Google’s Ironwood TPU architecture requiring every cross-cabinet link to run on 800G or 1.6T optics.

The 1.6T transition is the next structural driver. Nvidia has transitioned fully to 1.6T modules in its GB300 servers, and Zhongji Innolight began volume shipments of 1.6T products in Q3 2025, ramping sharply in Q4 to push its Q4 gross margin up nearly 2 percentage points to 44.48%.

The Bull Case

The company is the sole manufacturer globally capable of mass-producing and delivering both 800G and 1.6T optical modules at scale.

Qualification cycles take two to three years, meaning no competitor can displace an incumbent quickly regardless of capital investment.

Alphabet, Amazon, Microsoft, Meta and Nvidia are committing hundreds of billions of dollars in AI infrastructure spending through 2027, translating directly into optical transceiver purchase orders.

Q1 2026’s 46% gross margin and 262% net profit growth confirm the company is extracting value from the cycle, not merely participating in volume growth.

The Hong Kong listing acts as a valuation catalyst, bringing Zhongji Innolight into direct comparison with comparable global technology companies and into consideration for international index benchmarks.

The $3.45 billion cornerstone commitment from sovereign wealth funds, the world’s largest asset managers and major technology companies, held at six-month lockup, signals the depth of institutional conviction behind this listing.

The TeraHop subsidiary in Singapore and Thailand, capitalised with a $517 million injection backed by ADIA and Temasek, gives hyperscaler customers a procurement pathway outside mainland Chinese manufacturing, partially insulating the supply chain from trade friction.

The Bear Case

The most significant risk is the Pentagon designation. In June 2026, the US Department of Defense added Zhongji Innolight to its Section 1260H list of Chinese military companies, citing indirect ownership through SASAC and direct affiliation with China’s Ministry of Industry and Information Technology.

From 30 June 2026, the DoD is prohibited from contracting directly with listed companies. From 30 June 2027, that restriction extends through the supply chain.

The company’s commercial hyperscaler customers are currently unaffected, but the designation creates headline risk and a mechanism for escalation if US-China relations deteriorate.

Customer concentration is the second structural concern. The top five customers represent 75.98% of revenue, with Alphabet alone at 22%.

A slowdown in hyperscaler AI capital expenditure or a shift in Google’s procurement strategy would have immediate and material impact.

The third risk is technology disruption. Co-Packaged Optics, or CPO, is an emerging architecture that integrates optical components directly onto the chip package, potentially displacing pluggable transceivers in data centre configurations within three to five years.

The timeline is genuinely uncertain.

Finally, Zhongji Innolight depends on US suppliers for critical upstream components: DSP chips from Broadcom and Marvell, and high-end optical chips from Coherent and Lumentum.

There is currently no mature Chinese domestic alternative for DSPs. Any tightening of US export controls on these components would constrain production capacity regardless of the company’s own manufacturing capability.

What Happens on 30 July: H-Share Listing Mechanics

Zhongji Innolight already has an established trading history. Its A-shares on Shenzhen’s ChiNext board have gained over 60% year to date as of the listing hearing and approximately 4,155% over five years.

The A-share market capitalisation stood at approximately 1.09 to 1.13 trillion yuan as of mid-July 2026.

The H-share offer price represents approximately a 23% discount to the A-share price at launch, in line with the typical H-share discount for A+H listed companies.

The key signal in the opening days will be whether that discount narrows, reflecting whether international institutional demand meets or exceeds expectations.

One near-term catalyst is worth noting: Q2 2026 earnings are expected within weeks of listing.

If results confirm the strong growth trajectory implied by Q1, the two events compound positively for sentiment.

If Q2 disappoints relative to elevated expectations, selling pressure could arrive early in the H-share’s trading life.

Ways to Gain Exposure Through Phillip Nova

SEHK: 3308 — Zhongji Innolight

Hong Kong Stock Exchange

The most direct route. H-shares list on 30 July 2026 under stock code 3308, with trading commencing at 9:00 a.m. Hong Kong time.

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For investors wanting exposure to the same demand theme through other instruments, several upstream supply chain stocks are available through Phillip Nova.

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