Z.AI Raises $5 Billion in Hong Kong Share and Bond Sale as Shares Slide 10 Percent

Beijing-based artificial intelligence developer Z.AI Co Ltd, the company formerly known as Zhipu AI and now listed on the Hong Kong Stock Exchange under the ticker 2513, has completed a combined fundraising of about $5 billion, according to a Hong Kong Stock Exchange filing dated September 13, 2026. Reuters reported on September 13 that the total came from a Hong Kong share placement of about $2 billion and a concurrent convertible bond sale of about $3 billion. The company launched the two sales on Friday and confirmed the result in the Sunday filing.

The equity leg of the deal involved 21.97 million new Hong Kong shares priced at HK$714 each, which Reuters reported was a 10% discount to the company's Friday closing price of HK$793. That produced gross proceeds of about HK$15.68 billion, or roughly $2 billion. The debt leg consisted of 20.14 billion yuan, about $3 billion, of zero-coupon convertible bonds due in September 2027, issued at 100.5% of face value and settled in US dollars. The bonds carry an initial conversion price of HK$892.50 per share.

Z.AI, formerly Zhipu AI, is China's first major large language model company to go public. It listed on the Hong Kong Stock Exchange in January 2026 and then raised about $4 billion in a follow-on share sale in July 2026, which means the September transaction is its second mega-raise in roughly two months. Its flagship product line is the GLM, or General Language Model, family. TechNode reported on September 14 that Z.AI released GLM-5, GLM-5.1, GLM-5.2 and GLM-5.3 in succession between February and August 2026, refreshing its flagship model roughly every two months.

Investors did not greet the news warmly. CNBC reported on September 14 that Z.AI shares tumbled more than 10% on Monday, September 14, 2026, the first trading session after the filing. The selloff was not confined to Z.AI: CNBC also reported that shares of domestic rival MiniMax fell about 5% the same day. The wider Chinese AI sector is in the middle of an expensive buildout of computing infrastructure, and the market's reaction suggests investors are weighing the cost of that buildout against the pace of commercial returns.

Key Facts

The September 13, 2026 filing disclosed a total raise of $5 billion, split between roughly $2 billion of new equity and roughly $3 billion of convertible debt. Reuters reported on September 13 that the two tranches were sold concurrently, with the shares marketed at HK$714 each, or $91.05, against a Friday close of HK$793. The 10% discount is a concrete measure of how much the company conceded to place the stock quickly.

The convertible bonds pay no coupon and mature in September 2027. They were issued at 100.5% of face value with an initial conversion price of HK$892.50, which CNBC reported on September 14 was a 12.5% premium to Friday's close of HK$793 and which Reuters described as a 25% premium to the HK$714 placement price. Reuters also reported that Z.AI can redeem all, but not part, of the bonds from February 18, 2027 if its shares trade at or above 130% of the conversion price for 20 out of 30 trading days.

On use of proceeds, Reuters reported on September 13 that about 60% of net proceeds will fund research and development of next-generation models and the company's fully self-training system, while another 15% is earmarked for expansion. The remainder is for optimizing the capital structure, replenishing working capital and general corporate purposes. TechNode reported on September 14 that the plan also covers large-scale training and inference, computing resources and infrastructure upgrades, automated training-data generation and filtering, task environments, long-range reasoning, domestic-chip adaptation and inference optimization.

The raise lands on top of strong reported growth. Seoul Economic Daily reported on September 14 that Z.AI's first-half revenue reached RMB 954 million, a 399.7% jump year over year, while revenue from API calls rose more than 27-fold to account for 86.5% of total revenue. The same report noted that MiniMax raised an additional $2 billion in July and is preparing a STAR Market listing in Shanghai.

The funding wave extends well beyond startups. Seoul Economic Daily reported on September 14 that Alibaba raised HK$80 billion on the Hong Kong exchange last month and will channel the entire amount into AI infrastructure, Tencent issued $4.7 billion in dollar- and yuan-denominated bonds in June, and ByteDance secured a $29.6 billion syndicated loan from roughly 30 banks, about three times what it raised in 2024. As of end-June, Alibaba held RMB 474.5 billion in cash and liquid investments and Tencent held RMB 511.2 billion.

Analysis

What this really means is that Z.AI is choosing scale over near-term shareholder comfort. Raising roughly $5 billion only two months after a $4 billion placement, at a 10% discount to the previous close, necessarily pressures the existing share count, and the market answered immediately with a decline of more than 10% on Monday. The company is not raising because it lacks revenue growth: first-half revenue of RMB 954 million, up 399.7% year over year, is a fast trajectory. It is raising because the cost of frontier model training, inference capacity and talent is climbing faster than commercial revenue can cover on its own.

The structure of the debt is instructive. Zero-coupon convertible bonds due in September 2027 give Z.AI cash today without a cash interest burden, and the initial conversion price of HK$892.50 sits 12.5% above Friday's close and 25% above the HK$714 placement price. That design compensates bondholders with equity upside rather than coupon income, and it defers dilution until conversion, which is exactly what a capital-hungry developer wants. The redemption trigger, exercisable from February 18, 2027 if the shares hold at or above 130% of the conversion price for 20 out of 30 trading days, hands the company an early exit if the stock performs well.

Comparing Z.AI with its peers sharpens the picture. MiniMax fell about 5% on the same Monday, which suggests the reaction was partly sector-wide risk repricing rather than a verdict on Z.AI alone. Meanwhile Alibaba, Tencent and ByteDance are funding AI buildouts from balance sheets that startups cannot match. Alibaba's RMB 474.5 billion and Tencent's RMB 511.2 billion in cash and liquid investments as of end-June dwarf the amounts available to model developers. The 21st Century Business Herald noted that the domestic AI model industry remains in an investment-expansion phase and cannot cover enormous computing and research costs with commercial revenue alone.

Why It Matters

The competitive stakes are tied to silicon. CNBC reported on September 14 that Z.AI shares jumped last month after it launched a new AI model that it said runs entirely on Chinese-made chips, and the company claimed it used 100,000 domestically made chips to handle online requests for that model. TechNode reported on September 14 that domestic-chip adaptation and inference optimization are explicit line items in how the new $5 billion will be deployed. If Chinese model developers can train and serve frontier models on domestic hardware, the practical bite of restrictions on advanced accelerators weakens over time, and that has consequences for the entire global supply chain.

Capital markets matter just as much. Z.AI was China's first major large language model company to list, and its ability to return to Hong Kong investors twice in two months shows that the venue can absorb very large AI financings. Seoul Economic Daily reported on September 14 that DeepSeek is pursuing a listing and Moonshot AI is reportedly weighing Hong Kong and STAR Market listings, which suggests Z.AI's placements are being read as a template rather than an outlier.

The revenue mix matters too. With API-call revenue up more than 27-fold and accounting for 86.5% of total revenue, Z.AI's business is increasingly a usage-driven platform rather than a licensing story. That mix is more scalable, but it is also more exposed to price competition and to the cost of serving every additional request, which is precisely why the company is spending so heavily on inference infrastructure and self-training systems.

Next Up

The next hard checkpoint is February 18, 2027, when Z.AI's right to redeem the convertible bonds opens, conditional on the shares trading at or above 130% of the HK$892.50 conversion price for 20 out of 30 trading days. Before that, the company faces the September 2027 bond maturity and the continuing task of shipping the next generation of GLM models with the roughly 60% of net proceeds it has reserved for that purpose.

Watch the peer queue as well. MiniMax is preparing a STAR Market listing in Shanghai, DeepSeek is pursuing a listing, and Moonshot AI is reportedly weighing Hong Kong and STAR Market options. Each of those events will test whether the funding race that produced Z.AI's $5 billion raise continues at the same pace, or whether investors begin demanding a clearer path from heavy compute spending to durable profit.