By Matthew Hersh

Princeton University has revised its approach to achieving a net-zero endowment, rolling back a voluntary fossil fuel divestment policy adopted four years ago and signaling what appears to be the latest step in a broader institutional shift toward financial flexibility amid mounting economic uncertainties.

In a June 1 letter to the University community, Princeton University Investment Company (PRINCO) President Vincent Tuohey announced that the University will discontinue its voluntary divestment from publicly traded oil and gas companies while maintaining its trustee-mandated dissociation from thermal coal and tar sands investments. At the same time, PRINCO formally established a goal of achieving a net-zero endowment portfolio by 2046, matching Princeton’s target date for reaching net-zero greenhouse gas emissions on campus.

The decision marks a departure from the University’s 2022 strategy, when PRINCO voluntarily divested from all publicly traded fossil fuel companies as part of its effort to reduce the carbon footprint of the endowment. Tuohey wrote that after reviewing the policy with experts, he concluded that Princeton could better balance its sustainability goals and financial responsibilities by adopting a more flexible approach.

“It’s not obvious that PRINCO’s initial approach has moved the endowment meaningfully closer to net-zero,” Tuohey stated, adding that major energy companies may ultimately play “a significant role in the clean-energy transition.”

The move comes against the backdrop of growing financial pressures that University President Christopher L. Eisgruber highlighted in his February State of the University address. In that message, Eisgruber warned that changing market conditions and a less favorable political and economic environment could significantly constrain Princeton’s future growth and force difficult budget decisions.

A central concern has been the University’s $36 billion endowment, which supports a larger share of Princeton’s operating budget than at any other major research university. Earlier this year, the University reduced its long-term endowment return assumption from 10.2 percent to 8 percent, citing weaker prospects for private equity investments and changing market fundamentals. University leaders warned that lower expected returns could translate into billions of dollars less in endowment value over the coming decade and require sustained spending reductions across campus.

Since Eisgruber’s February address, the University has undertaken a series of cost-cutting measures. In March, Princeton announced reductions in benefits and wage growth as part of campus-wide efforts to adapt to slower revenue growth. Later that month, restructuring and layoffs affected the Keller Center for Innovation in Engineering Education, with administrators describing the changes as part of a longer-term strategy to focus resources on core institutional priorities.

The net-zero endowment revision follows that same approach.

In his letter, Tuohey emphasized the importance of preserving investment flexibility at a time when higher education faces financial strain. The University, he said, is unusually dependent on endowment income to support financial aid, faculty salaries, scientific research, graduate stipends, and other core functions. Self-imposed restrictions on investment strategy, he argued, can have outsized consequences for the University’s ability to fulfill its mission.

“What is clear is that our revised approach will give PRINCO greater flexibility in managing an endowment whose resources are critical for financial aid and scientific research — including climate research — at a time when our sector is under financial strain,” Tuohey wrote.

The announcement does not alter the University’s broader climate commitments, which include its campus-wide goal of achieving net-zero greenhouse gas emissions by 2046 through major infrastructure projects, including geothermal energy systems, expanded solar generation, and the conversion of campus heating and cooling systems away from fossil fuels.

Tuohey also showed no indication to reverse the University’s 2021 decision to dissociate from companies involved in thermal coal and tar sands production, a policy that remains in effect. The University also plans to establish an advisory committee to help measure and track emissions associated with its endowment investments, a step originally requested by the board of trustees.

The decision could draw scrutiny from climate advocates who had viewed the University’s 2022 fossil fuel divestment as a landmark achievement. The University now joins a growing number of institutions reassessing investment restrictions as federal research funding pressures, market volatility, and slower endowment growth force administrators to reconsider financial priorities.

University officials declined to provide additional comment outside of Tuohey’s letter.