Executive Summary

March 30, 2026 8 mins

Executive Summary

Greg Case, Aon's chief executive officer, and Elsa Ballard, head of strategic finance and corporate sustainability, share their perspectives on the important role corporate sustainability plays in our operations and client engagements.

Introduction
A Message From Our CEO
Our Impact
A Message from Our Head of Strategic Finance and Corporate Sustainability
Related Information

Better Decisions for a Better World

At Aon, helping clients manage their risk and people concerns is at the core of what we do. We see significant opportunity in both enhancing our own impact and delivering innovative solutions to clients and the wider market.

A Message From Our CEO

Greg Case, Aon's chief executive officer, shares his perspective on the important role corporate sustainability plays in our operations and client engagements.

On behalf of colleagues across our firm, we are proud to share Aon’s Impact Report for 2025, which highlights our collective efforts to shape decisions for the better and protect and enrich the lives for our colleagues and global stakeholders.

In 2025, the volatility, uncertainty and pace of change for organizations around the world further accelerated and grew in complexity. From historic wildfires in California to the challenges and opportunities presented by AI to the re-emergence of trade wars and tariffs and the impact of GLP-1s on health care costs and outcomes, four megatrends – Trade, Technology, Weather and Workforce – continued to drive unprecedented client need across risk and people issues.

The interconnectivity and compounding nature of these trends reinforced the ongoing relevance and value of our 3x3 Plan to go further, faster on our Aon United strategy to serve clients, colleagues and communities as one global firm. This Aon United focus is integral to everything we do, including our commitments to all our stakeholders related to sustainability, engagement and wellbeing and governance issues.

At Aon, we are passionate about managing sustainability. Key among our corporate sustainability priorities is our focus on achieving net-zero greenhouse gas emissions by 2030 for our Scope 1 and market-based Scope 2 emissions, which are attributable to our own operations, alongside our efforts with our colleagues, clients, suppliers and other stakeholders to further reduce our shared impact on the environment. We are pleased to share our efforts toward this goal to date within this report.

Beyond our internal efforts, over the course of 2025 this focus has motivated our firm to innovate and dedicate resources to important causes and organizations. For example, in response to the catastrophic wildfires in Southern California at the start of 2025, our award-winning suite of disaster response capabilities – powered by Aon’s own and third-party artificial intelligence-enabled solutions – provided unparalleled insights into the impact of the fires and connected meaningful resources to aid in economic relief. Also in 2025, Hurricane Melissa triggered an immediate $150 million payout from a catastrophe bond delivered by Aon for the government of Jamaica to finance emergency response, restore infrastructure and protect social programs – an economic lifeline for a community in need.

We also accelerated our ability to create unmatched value for clients and communities by attracting, retaining and developing exceptional talent. That is why we continued to invest in and support our colleagues and our communities in 2025 through development and volunteer programs that you can read about in this report across our global footprint. Notably, as part of Aon’s broader commitment to Ukraine’s recovery and long-term resilience, we launched the Ukraine Early Careers Program, a dedicated initiative to help displaced Ukrainian professionals who are unable to return home build their skills, expand their networks and lay the foundation for future success.

We are excited to share the progress highlighted in this report as we continue to take meaningful steps to deliver impact for our clients, colleagues and communities.

Greg Case

President and Chief Executive Officer, Aon plc

Aon United is integral to everything we do — including our commitments related to sustainability, engagement and wellbeing and governance.

Greg Case

President and Chief Executive Officer

A Message from Our Head of Strategic Finance and Corporate Sustainability

Elsa Ballard, Aon's head of strategic finance and corporate sustainability discusses the progress we've made against our long-term commitments and strategy.

Thank you for your interest in Aon’s 2025 Impact Report. I am proud to share the progress and momentum of our Corporate Sustainability program over the past year.

In this report you’ll read about our commitment to translating strategy into real-world impact — from expanding climate insurance access for coffee-growing communities in Colombia to supporting colleague-led ecological restoration efforts in Mexico City’s historic floating island ecosystems.

Our efforts demonstrate how we are helping build a more sustainable, resilient future for our clients, colleagues and communities while continuing to raise the bar for responsible business practices around the world.

Environmental Responsibility, Resilience and Impact

This year, we made significant strides in advancing our climate strategy. Aon’s CDP Climate Change report score improved to a B, demonstrating our strengthened approach to environmental transparency and action for both our firm and our clients. We made meaningful progress toward our net zero by 2030 target, reducing Scope 1 and Scope 2 emissions by 7.5% from 2024, and increasing the percentage of our total energy office consumption from renewable sources to 13% as well as furthering efforts to improve data accuracy year over year. And, for the first time, for 2025, our Scope 1 and Scope 2 location-based and market-based greenhouse gas emissions received limited assurance, reinforcing our commitment to transparency and accountability.

During New York Climate Week, Aon convened leaders across industries for our fourth annual Risk and Resilience Summit to explore the role of the insurance industry in advancing resilience solutions. At COP30, Aon served as a founding member of the $3 billion “Mobilizing Business for Resilience” initiative, supporting coordinated private‑sector action to improve climate resilience, aligned with science and global policy frameworks. These efforts reflect progress in reducing our environmental footprint while supporting the transition to a more resilient, lower-carbon economy.

Strengthening Colleague and Community Engagement

Foundationally, our people remain at the heart of our success. In 2025, our colleague engagement score reached 88 percent, highlighting the passion and dedication of our global team. We published Aon’s global Health and Safety Statement, reaffirming our focus on colleague wellbeing, and we advanced our commitment to making a positive impact in the communities where we live and work around the world.

As a reflection of this commitment, once again in 2025 we granted our global colleagues two days off as “wellbeing days,” and launched a subsidized GLP-1 weight management benefit program for our U.S. workforce.

We will continue to foster a culture where every colleague can thrive, and we are proud of the difference our teams make in the communities where we live and work.

Governance and Risk Management

At Aon, effective governance is foundational to our Corporate Sustainability strategy. This year, in addition to continued effective Board oversight of Corporate Sustainability, we enhanced our Corporate Sustainability governance structure, introducing a new committee charter and establishing a dedicated management-led Steering Committee and relevant subcommittees. These enhancements to our governance structure ensure robust oversight and alignment with our strategic priorities.

We have also added incremental detail to our annual Impact Report regarding our artificial intelligence best practices, cyber and data protection, ethics and compliance standards and anti-bribery and corruption program—underscoring our commitment to proactive risk management.

Redefining Resilience

At Aon, resilience is more than just adapting to change—it is leading our industry in the face of uncertainty. In 2025, we expanded our efforts to improve access to insurance and capital for countries, communities and people around the world.

We use advanced data, analytics and financial engineering to make resilience more accessible, faster and more equitable. By connecting humanitarian organizations, insurers and capital providers — using tools like parametric insurance and catastrophe bonds — we help communities better manage and recover from risk.

As we look to the future, we remain steadfast in our commitment to advancing our Corporate Sustainability agenda and delivering lasting value for all our stakeholders.