Z.ai Raised $9 Billion in Two Months and the Stock Fell

Z.ai, the Beijing lab formerly known as Zhipu AI and the maker of the GLM model family, disclosed a roughly $5 billion fundraising in a filing on September 13. It comes about eight weeks after a $4 billion follow-on share sale in July. On Monday, September 14, its Hong Kong shares fell as much as 10.5%, their lowest level in about five months, Reuters reported.

Unlike OpenAI or Anthropic, Z.ai raises money in public, so the market prices every raise the same day. This one was priced lower.

The terms

The raise comes in two parts, according to the filing as reported by Reuters.

The placement: 21.97 million new Hong Kong shares at HK$714 each, a 10% discount to Friday's close of HK$793, raising about $2 billion.

The bonds: 20.14 billion yuan (about $3 billion) of zero-coupon convertible bonds due September 2027, issued at 100.5% of face value. The initial conversion price is HK$892.50, a 25% premium to the placement price. Z.ai can redeem them early starting February 18, 2027, if the shares trade at or above 130% of the conversion price for 20 of 30 trading days.

Use of proceeds: about 60% for R&D on next-generation models and self-training systems, 15% for expansion, and the rest for capital structure, working capital, and general corporate purposes.

Z.ai listed in Hong Kong in January 2026, the first large language model developer to do so. This is its third equity financing since then.

The business behind the ask

Z.ai's revenue is growing fast, and it still covers only a fraction of costs. First-half 2026 results, reported August 31:

• Revenue: 953.9 million yuan, up about 400% year over year.
• Net loss: roughly 2 billion yuan, down from 2.4 billion a year earlier.
• R&D spending: 2.1 billion yuan, up 36.6%, more than twice revenue.
• Revenue mix: open-platform and API revenue made up 86.5% of the total, per Caixin. A year earlier that share was about 15%.

Caixin also reported that token calls on the platform have grown more than 40-fold since early 2026, that enterprise and developer users total 7.4 million, and that the annualized revenue run rate reached $1.6 billion as of August. J.P. Morgan analysts, cited by Reuters, expect 5 billion yuan of full-year revenue and an adjusted profit by 2028.

The shift toward APIs is the company's real story. A year ago, API revenue was a small minority of the business. Now Z.ai mostly sells tokens. That shift followed a steady release pace, GLM-5 through GLM-5.3 between February and August, and investors rewarded it: Z.ai's market value briefly topped HK$1 trillion in June after GLM-5.2. The shares have lost nearly half their value since that peak.

What $9 billion is for

The numbers don't add up to a runway problem. They add up to a compute bill.

At its first-half rate, Z.ai loses about $280 million every six months. The two raises total roughly $9 billion. If about 60% of this one, around $3 billion, goes to model R&D and training compute, that alone is several years of R&D at the first-half pace. You don't raise that much to survive. You raise it to buy the cluster needed for the next generation of models.

That's the market Chinese labs are in. Seoul Economic Daily noted that MiniMax raised $2 billion in July and that DeepSeek and Moonshot AI are weighing listings. In Z.ai's case, shipping a new GLM every couple of months, with a flagship built to compete with Western frontier models, requires capital at a scale revenue won't cover for years.

The convertible is a bet on the stock

The bond structure is the most telling part. A zero-coupon bond that converts at a 25% premium only works well for Z.ai if the stock rises past HK$892.50 before September 2027. If that happens, bondholders convert, the debt becomes equity, and Z.ai never pays cash back.

If the stock doesn't recover, Z.ai owes about $3 billion in one year, at a time when it's spending heavily on compute. Monday's drop pushed the conversion price further out of reach. Z.ai is betting that next-generation GLM releases and API growth will lift the stock before a one-year maturity comes due.

Timing made it harder. The filing landed the same weekend the heads of Anthropic, OpenAI and xAI publicly backed slowing frontier AI development, which added to pressure on AI stocks across the region. The Hang Seng AI index fell 2.4%, and MiniMax dropped 5.6% by the midday break. Analysts at Guotai Haitong Securities told Reuters that investors now want clearer evidence of fundamental improvement.

What this actually means

Z.ai offers something the Western labs don't: a frontier lab's cost structure disclosed every half-year and priced every trading day. OpenAI and Anthropic set their valuations in private rounds. Z.ai takes a 10% discount in public, and its shares falling on the news is part of the price.

On the same day Beijing called American calls to slow down fearmongering, a Chinese lab committed most of a new $5 billion to building the next generation faster. Whether shareholders fund that pace is now a question the Hong Kong market answers daily.

Watch the next flagship GLM release, the API run rate in the next disclosure, and where the shares sit relative to HK$892.50 as the bonds approach maturity.