Key Highlights

  • Anthropic appointed Christopher Stubbs, a Harvard professor of physics and astronomy, to its Long-Term Benefit Trust on Wednesday.
  • Stubbs is the first physicist to join the Trust, which is independent of Anthropic's management and investors.
  • The Trust can appoint a majority of Anthropic's board and advises leadership on the societal impacts of AI.
  • Anthropic filed confidentially for an IPO in June and has committed 5 percent of shares to a public benefit fund.

The Appointment

Anthropic announced on Wednesday that it has appointed experimental physicist Christopher Stubbs to its Long-Term Benefit Trust. The Trust helps elect the company's board members and advises its leadership.

Stubbs is a professor of physics and astronomy at Harvard University, where he previously served as dean of science. His research covers gravitational physics, dark matter, dark energy and observational cosmology. He is the first physicist to join the Trust.

In a LinkedIn post on Wednesday, Stubbs said he uses AI tools in his research every day and that the doors they open for science are remarkable. He said that as a teacher he is confronting the hard questions the technology raises, and that as a grandfather he wants the generation growing up with AI to be better off for it. He said he was grateful for the chance to help carry out the work.

What the Trust Does

The Long-Term Benefit Trust is financially independent of Anthropic's management and investors. A company blog post says it has the ability to appoint a majority of the board. Trustees also advise board members and other leaders, especially on the societal impacts of AI.

Anthropic's published description of the arrangement adds detail. The Trust holds a separate class of stock, called Class T, which is held only by the Trust and gives it authority to elect and remove some directors. The number of seats it controls phases in as time-based and funding-based milestones are met, and the company says the Trust elects a majority of the board within four years. A separate seat is elected by investors from the Series C round onward.

Protective provisions also require that the Trust receive notice of certain significant actions affecting the company. Anthropic is a public benefit corporation, which the company describes as balancing commercial success with broader societal benefit. The Trust is a Delaware purpose trust, whose purpose mirrors the company's: to balance the financial interests of stockholders with the interests of people affected by the company's conduct and its public benefit purpose. The company describes the trustees as financially disinterested. It says the Trust has five members who serve one-year terms, with future trustees chosen by a vote of the existing members.

Who Else Sits on the Trust

Alongside Stubbs, the Trust includes Ben Bernanke, the former chair of the Federal Reserve, who joined in July, announced on July 10. Bernanke led the Fed from 2006 to 2014, is a distinguished fellow at the Brookings Institution and won the 2022 Nobel Prize in Economic Sciences. The Trust also includes Neil Buddy Shah, the chief executive of the Clinton Health Access Initiative, and Richard Fontaine, a national security expert who joined in May 2025. Anthropic's description also lists Mariano-Florentino Cuéllar, who joined in January.

The Trust has seen turnover. Jason Matheny, Paul Christiano, Kanika Bahl and Zach Robinson have all stepped down from earlier seats.

The Timing

The appointment comes as Anthropic prepares for a public offering. The company confidentially filed its prospectus with the Securities and Exchange Commission in June and has held meetings with prospective investors in recent weeks.

On Sunday, Anthropic announced plans to commit 5 percent of its shares to a new public benefit fund, with the board free to add more.