Mobilizing Private Capital for the Net-Zero Energy Transition: Lessons from Penn’s Endowment Investment

With political and legal anti-ESG attacks rising in the United States, the future of sustainable investing feels unsteady. However, Penn’s Office of Investments offers a concrete case study—a four-year journey from pledge to practice that reveals best practices for mobilizing private capital in support of the net-zero energy transition.

The 2021 Commitment

In April 2021, the University of Pennsylvania pledged to reduce net greenhouse gas emissions from its $20.5 billion endowment to zero by 2050, in line with the goals of the Paris Agreement. To drive this institutional commitment to global climate mitigation, the Penn Office of Investments implemented two mechanisms: strategic investment toward low-carbon assets and engagement with investment managers to drive decarbonization across portfolio companies.

The Office’s approach evolved systematically. In 2023, they joined the ESG Data Convergence Initiative, an investor-led effort to standardize emissions reporting. Their 2024 update revealed a strategic inflection point: the Office developed a five-category framework to assess partners’ decarbonization capacity—Organizational Commitment, Governance and Resourcing, Underwriting Process, Value Creation and Measurement, and Reporting. The underwriting process is particularly critical: it requires investment partners to demonstrate how climate considerations are embedded throughout the deal lifecycle—from selection to post-investment value creation. This ensures low-carbon transitions function as core investment criteria, not cosmetic add-ons.

On engagement, the Office reports conducting in-depth manager conversations and developing best practices. From these dialogues, they can deliver feedback to management teams and boards on governance structures, climate-risk pricing in underwriting, and concrete value-creation plans. The Office likely holds substantial leverage here because, as an endowment, it is the owner of its capital. However, measurable outcomes remain unclear in the behavioral dimension—while the Office tracks engagement coverage and shares qualitative examples of progress, it does not publish standardized metrics on post-engagement alignment with its five-category framework. This gap between framework and outcome reporting weakens accountability.

Nonetheless, the Office’s dual approach represents an innovative engagement model that leverages capital as a behavioral intervention.

Where We Are Now

Now valued at $24.8 billion, the endowment has grown by $4.3 billion since the 2021 commitment. The simultaneous increase in the payout rate has allowed more capital to support the University’s academic budget, with $1.1 billion allocated to its $4.7 billion academic budget in FY2025—particularly important in light of changes to federal loan policies, lower international student enrollment, higher investment income excise taxes, and reductions in research funding. Penn’s endowment performance challenges anti-ESG narratives—proving that financial growth, fiduciary duty, and climate responsibility can advance together.

Investment behavior has also shifted: according to the 2024 Net-Zero Update, Penn’s exposure to energy transition companies is approximately 2.5% of the endowment, covering roughly 200 companies (specific figures for portfolio coverage, dollar value, or 2025 projections are not publicly disclosed). Recent investments include European renewable infrastructure, U.S. grid infrastructure manufacturers, next-generation geothermal companies, smart meter manufacturers, and EV charging developers.

Several partners have achieved approval from the Science Based Targets Initiative, reflecting credible decarbonization commitments. Many managers now systematically incorporate climate considerations into their underwriting processes before executing investments. Beyond measurement, managers are implementing real decarbonization initiatives, including transitioning to renewable energy and EV fleets, upgrading equipment, retrofitting facilities, optimizing transportation, and establishing internal carbon pricing.

Where Can We Grow?

In addition to their established framework and manager engagement protocols, what structural innovations could amplify the Office’s impact? One mechanism is a dedicated sustainable investment fund–a structure employed at the Brown Investment Office through two endowed vehicles: the Brown Sustainable Investment Fund (BUSIF) and the Social Choice Fund. These allow targeted donations toward sustainability mandates, directly embedding community governance into portfolio construction.

Another innovation is a student-led fund. Brown’s Investment Office allocates $165,000 to the Socially Responsible Investment Fund (SRIF), where student fund managers integrate ESG considerations with financial analysis. Penn could spearhead a similar initiative, leveraging Wharton’s institutional expertise and partnering with the Impact, Value, and Sustainable Business Initiative. Such a partnership could create bidirectional value: the Office extends governance and cultivates the next generation of investment leaders, while Wharton provides enhanced learning opportunities in sustainable finance.

The Office has built a rigorous deployment model, but the gap between current emissions trajectories and Paris Agreement targets demands continuous innovation. By systematically evaluating peer mechanisms and incorporating proven structures, Penn can deepen its institutional capacity to mobilize private capital toward net-zero infrastructure and technology deployment.

Cady Wang

Undergraduate Seminar Fellow

Cady Wang is a senior majoring in economics with minors in environmental studies and English literature. Wang is also a 2025 Undergraduate Student Fellow.