Anthropic’s IPO filing sent Asian stocks higher on Tuesday, reviving interest in technology and semiconductor shares after a sharp sell-off across the region.
South Korea led the gains, with the KOSPI rising 3.1%. Samsung Electronics climbed 4.2% and SK Hynix advanced 5.2%, while the market also drew support from data showing South Korean economic growth of 3.4% year on year in the third quarter of 2026.
The rise interrupted several days of heavy selling. The KOSPI had fallen 18.2% over the previous month.
Japan’s Nikkei 225 gained 1.7%. SoftBank, which is investing in artificial intelligence for future growth, rose 5%, while semiconductor testing equipment maker Advantest increased by almost 9%.
Anthropic, the San Francisco company behind the Claude service, submitted its S-1 registration statement to the US Securities and Exchange Commission on Monday.
The filing showed first-half revenue of $16.3 billion, compared with $1.2 billion a year earlier. It reported an operating loss of $693 million, down from $2.1 billion in the same period a year earlier, and a net loss of $80.7 billion.
The company said it intended to list its Class A common stock on the Nasdaq Global Select Market under the symbol “ANT”. Media reports have suggested a valuation of between $1.5 trillion and $2 trillion, potentially making it one of the largest listings on record.
The flotation has renewed hopes among investors that demand for artificial intelligence infrastructure will remain strong, easing concern that spending by major technology companies could slow and weigh on Asian chipmakers.
Gary Ng, a senior economist for Asia Pacific at Natixis, said: “If the outlook for Anthropic is convincing with high profitability, more spending on AI infrastructure can translate into more sales and stronger pricing for Japanese and South Korean semiconductor supply chains.”
Elsewhere, Australia’s S&P/ASX 200 rose 0.4% and India’s Nifty 50 gained 0.1%. Singapore’s Straits Times Index slipped 0.1%.
Chinese stocks lag as Anthropic IPO lifts regional technology shares
Chinese markets moved in the opposite direction. Hong Kong’s Hang Seng Index fell 0.7%, while mainland China’s CSI 300 declined 1.3%.
Technology shares also weakened. Semiconductor Manufacturing International Corporation dropped 1.3%, robotics maker Unitree fell 4.8% and AI processor designer Cambricon lost 5.7%.
Z.ai, the Chinese developer behind the GLM family of models, was an exception, rising 8.9%.
Alicia Garcia Herrero, chief economist for Asia Pacific at Natixis, said Hong Kong and mainland markets “barely budged because they sit outside the main U.S. AI supply chain”. She added that export controls restricted access to the most advanced chips, while users could already choose cheaper domestic models from companies including DeepSeek.
