Former Bloomberg Journalist Jack Clark Became an Anthropic Cofounder Worth an Estimated $15.5 Billion

In 2016, Jack Clark was a reporter at Bloomberg. He wrote about artificial intelligence (AI), including the scientists and companies building smarter and more powerful computer systems. Ten years later, he had helped create one of the world's most valuable AI companies.

Clark is 37 years old and has an estimated $15.5 billion fortune, according to Forbes. Most of his wealth comes from his ownership share in Anthropic, the company that makes the Claude AI assistant. He did not make his fortune by spending his career building AI models himself.

His journey from technology reporter to billionaire shows something unusual about Silicon Valley. Understanding new technology and helping decide how governments should handle it can sometimes be just as valuable as writing the computer programs.

From Writing About AI to Working at OpenAI

Clark started his reporting career by writing about technology for publications such as ZDNet and The Register. He joined Bloomberg in 2014.

He focused on artificial intelligence at a time when most people were not yet using it in everyday life. He wrote about many subjects, from neural networks, which are computer systems designed to learn from information, to the growing power of Google and other technology companies.

His old Bloomberg article collection includes interviews with leading AI scientists. It also includes reports about how smarter and more capable AI systems might change society.

In September 2016, Clark stopped working as a journalist and joined OpenAI. He later became the company's policy director.

Instead of building neural networks, he worked on explaining AI to the public, communicating with governments, researching AI safety, and helping government officials understand what new AI systems could do.

He also started Import AI, a newsletter about AI research and how the technology could affect the wider world.

Clark is still interested in how AI might affect the economy. He recently explained Anthropic's possible economic outcomes. One of the company's more ambitious predictions says that the total value of goods and services produced in the United States, known as GDP, could reach $44.4 trillion by 2030.

How a Former Reporter Became Worth $15.5 Billion

In 2021, Clark teamed up with six people who had also worked at OpenAI, including Dario Amodei and Daniela Amodei. Together, they started Anthropic.

The company focused on building very powerful AI systems while also studying how to keep them safe and how they might affect people and society.

Over the next five years, Anthropic grew into one of the most valuable privately owned companies in the AI industry.

In May 2026, Anthropic raised $65 billion from investors in a funding round that valued the company at $965 billion. This more than doubled the estimated wealth of its seven founders.

Forbes estimates that each founder owns a little more than 1.6% of Anthropic. Based on that estimate, Clark's share is worth about $15.5 billion.

The company's huge estimated value has continued to attract attention as Anthropic considers a possible stock market listing, which would allow the public to buy shares in the company.

But Clark does not have $15.5 billion sitting in a bank account. Most of his estimated wealth comes from the Anthropic shares he owns. Their value depends on how much investors are willing to pay for those shares.

This is important because investors are still discussing whether Anthropic can really be worth the $2 trillion it has reportedly hoped to reach when going public.

The Former Reporter Who Now Helps Guide AI Policy

Clark still works closely with many of the same questions he used to write about as a reporter.

He leads Anthropic's research into how AI can affect the public. His work looks at what happens to jobs, governments, and society as AI systems become more powerful.

Anthropic has also had to make difficult choices about AI safety. Some researchers have warned that AI might improve faster than people can develop ways to keep it safe.

At the same time, Anthropic's very fast growth in revenue, or money earned from its business, has made it a major competitor to OpenAI.

As Anthropic has grown, it has also attracted interest from possible investors such as Nvidia. This shows how quickly Anthropic has become one of the important companies in the worldwide AI industry.