Sustainability and ESG entered a defining period between 2025 and 2026. Businesses, governments, investors, and civil society organizations faced growing pressure to balance economic growth with environmental responsibility, social impact, and long-term resilience. Political shifts, regulatory uncertainty, and debates around ESG investing created challenges across global markets. Despite these obstacles, momentum behind clean energy, climate innovation, sustainable finance, and responsible business practices continued to accelerate.
Across industries and regions, a select group of leaders played a pivotal role in advancing sustainability conversations and influencing real-world action. Through research, policymaking, investment leadership, advocacy, education, and corporate transformation, these individuals helped shape the future of climate action and responsible business.
The following leaders have made exceptional contributions to sustainability and ESG throughout the past year, extending their influence far beyond their own organizations.
1. Paul Polman
Paul Polman remains one of the most respected figures in sustainable business leadership. During his tenure as CEO of Unilever, he demonstrated that strong financial performance and ambitious sustainability goals can coexist successfully. His leadership helped establish Unilever as a benchmark for corporate sustainability while delivering significant shareholder value.
As co-founder of IMAGINE and co-author of Net Positive, Polman continues to advocate for businesses that create more value for society than they consume. Throughout 2025 and 2026, his commentary on climate action, renewable energy growth, social equity, and corporate accountability reached a global audience.
His ability to connect sustainability with business performance makes him one of the most influential voices in the field today.
2. Andrew Winston
Andrew Winston has built a reputation as one of the leading experts on corporate sustainability strategy. Through books such as Green to Gold, The Big Pivot, and Net Positive, he has helped organizations understand how sustainability can be embedded into core business operations.
His work focuses on practical implementation rather than broad commitments alone. By helping companies translate environmental and social ambitions into measurable actions, Winston has become a trusted advisor for sustainability professionals worldwide.
His insights continue to shape how organizations approach long-term value creation.
3. Christiana Figueres
Christiana Figueres is widely recognized for her central role in helping secure the Paris Climate Agreement, one of the most significant international environmental agreements ever achieved.
As a climate diplomat, author, and co-founder of Global Optimism, she continues to champion ambitious climate action while promoting optimism and collaboration. Throughout 2025 and 2026, Figueres remained a powerful advocate for accelerating the global energy transition despite political and economic challenges.
Her combination of diplomatic expertise and public engagement has made her one of the most trusted figures in climate leadership.
4. Kate Raworth
Kate Raworth has transformed discussions about economic development through her groundbreaking Doughnut Economics framework. Her model challenges traditional measures of economic success by emphasizing human wellbeing within environmental limits.
Governments, cities, educational institutions, and businesses around the world have adopted aspects of her framework to guide sustainable decision-making. Her work continues to influence debates about how societies can prosper without exceeding ecological boundaries.
Raworth remains one of the most innovative thinkers in sustainability economics.
5. Johan Rockström
Johan Rockström is one of the world’s leading climate and Earth system scientists. As a co-developer of the Planetary Boundaries framework, he has helped establish scientific benchmarks for maintaining a stable and resilient planet.
His research has become foundational for policymakers, business leaders, and sustainability professionals seeking to understand environmental risks and opportunities. Throughout 2025 and 2026, Rockström continued to communicate critical climate science to both expert and public audiences.
His work provides essential evidence supporting global sustainability efforts.
6. Nigel Topping
Nigel Topping has played a major role in mobilizing businesses, cities, and institutions around climate commitments. Through initiatives such as Race to Zero and Race to Resilience, he helped create one of the largest global coalitions focused on climate action.
His experience connecting international climate goals with practical implementation has made him a valuable voice in sustainability discussions. Topping continues to advocate for credible pathways toward decarbonization and climate resilience.
His leadership bridges the gap between global ambition and operational action.
7. Katharine Hayhoe
Katharine Hayhoe is widely regarded as one of the most effective climate communicators in the world. A respected climate scientist and educator, she excels at making complex environmental issues understandable and relevant to diverse audiences.
Her work emphasizes constructive dialogue and practical solutions rather than polarization. Through speaking engagements, media appearances, and educational initiatives, Hayhoe continues to engage communities that are often overlooked in climate conversations.
Her approach has helped broaden support for climate action across ideological divides.
8. Bob Eccles
Bob Eccles has been a leading voice in sustainability reporting, ESG measurement, and integrated corporate disclosure. As a scholar and thought leader, he has contributed significantly to improving how organizations communicate environmental and social performance.
His work focuses on ensuring that sustainability information remains relevant, transparent, and financially meaningful. During a period of intense debate around ESG reporting standards, Eccles provided balanced and evidence-based perspectives.
His influence continues to shape the future of corporate accountability.
9. Larry Fink
As CEO of BlackRock, Larry Fink occupies one of the most influential positions in global finance. His annual communications to business leaders have played a major role in shaping discussions around long-term value creation, climate risk, and corporate responsibility.
Despite increasing scrutiny of ESG investing, Fink has consistently emphasized the importance of understanding sustainability-related risks and opportunities. His decisions and perspectives influence investment flows across industries and markets worldwide.
His role makes him a central figure in sustainable finance.
10. Lynn Forester de Rothschild
Lynn Forester de Rothschild has been a prominent advocate for stakeholder capitalism and inclusive economic growth. Through the Coalition for Inclusive Capitalism, she has brought together business leaders, investors, and policymakers to discuss long-term value creation.
Her work emphasizes the importance of balancing shareholder returns with broader societal responsibilities. By fostering collaboration across sectors, she continues to influence discussions about the future of responsible capitalism.
Her impact is often felt through convening power and strategic leadership.
11. Mary Robinson
Mary Robinson has spent decades championing human rights, social justice, and climate equity. As a former head of state and international leader, she has consistently highlighted the connection between environmental challenges and human wellbeing.
Her advocacy focuses on ensuring that climate policies consider vulnerable populations and address inequalities. Throughout 2025 and 2026, Robinson continued to elevate conversations around climate justice on the global stage.
Her moral leadership remains highly influential in sustainability circles.
12. Al Gore
Al Gore remains one of the most recognized climate advocates in modern history. His efforts have helped bring climate science into mainstream public discourse and inspired generations of environmental leaders.
Through The Climate Reality Project and other initiatives, Gore continues to support climate education, advocacy, and action worldwide. His work emphasizes both the urgency of environmental challenges and the opportunities created by clean energy innovation.
His influence spans politics, business, and environmental activism.
13. Bertrand Piccard
Bertrand Piccard is known for demonstrating the potential of clean technology through ambitious real-world achievements. His historic solar-powered flight around the globe showcased the capabilities of renewable energy innovation.
Through the Solar Impulse Foundation, he promotes solutions that combine environmental benefits with economic viability. His work highlights the growing number of technologies capable of supporting a sustainable future.
Piccard remains a powerful advocate for innovation-driven climate solutions.
14. Hindou Oumarou Ibrahim
Hindou Oumarou Ibrahim has become one of the most important voices representing Indigenous communities within global climate discussions. Her advocacy emphasizes the value of traditional knowledge, biodiversity protection, and community resilience.
She works to ensure that Indigenous perspectives are included in environmental decision-making processes. Her leadership has strengthened understanding of how local communities contribute to climate adaptation and conservation.
Her work highlights the human dimension of sustainability.
15. Tara Shine
Tara Shine has built a reputation for making sustainability practical and accessible. As a climate scientist, business advisor, and author, she focuses on helping individuals and organizations take meaningful environmental action.
Her communication style combines scientific credibility with practical guidance, making sustainability feel achievable rather than overwhelming. Through speaking, writing, and consulting, she continues to inspire positive change.
Her influence is particularly strong among professionals seeking actionable solutions.
16. Tom Rivett-Carnac
Tom Rivett-Carnac played a significant role in the development of international climate agreements and remains a respected climate strategist. Through Global Optimism and various educational initiatives, he helps organizations and individuals understand climate challenges and opportunities.
His work focuses on leadership, collaboration, and practical action. By translating policy expertise into accessible insights, he has become an important voice within the sustainability movement.
His contributions continue to shape climate conversations globally.
17. Rachel Kyte
Rachel Kyte is a leading expert on sustainable development, clean energy, and international climate policy. Her career has spanned senior roles in academia, international organizations, and global energy initiatives.
Her work emphasizes the importance of equitable energy access while accelerating decarbonization efforts. Through research, public engagement, and policy leadership, Kyte continues to influence discussions around the future of sustainable development.
Her expertise bridges environmental, economic, and social priorities.
18. Mindy Lubber
Mindy Lubber has become a leading figure in sustainable finance and corporate climate accountability. Through her leadership at Ceres, she works with investors and businesses to advance responsible environmental practices.
Her efforts focus on using financial influence to encourage stronger sustainability performance and greater transparency. Throughout 2025 and 2026, Lubber remained a key advocate for investor-driven climate action.
Her work demonstrates the growing role of finance in environmental progress.
19. Mark Carney
Mark Carney has successfully connected the worlds of finance, economics, and climate policy. His experience as a central banker, climate finance advocate, and political leader has given him a unique perspective on sustainability challenges.
He continues to emphasize the financial risks associated with climate change while advocating for investment in low-carbon solutions. His leadership has influenced both public policy and private-sector decision-making.
Carney remains one of the most influential figures in sustainable finance.
20. Hiro Mizuno
Hiro Mizuno has played a major role in advancing ESG investing among institutional investors. His experience managing one of the world’s largest pension funds provided practical insight into how sustainability considerations can be integrated into investment strategies.
He continues to advocate for responsible ownership, long-term value creation, and corporate accountability. His influence extends across global financial markets and governance discussions.
Mizuno remains a respected voice in sustainable investing.
21. Tensie Whelan
Tensie Whelan has become a leading researcher examining the business benefits of sustainability initiatives. Her work provides evidence that environmental and social investments can support financial performance and organizational resilience.
Through academic research and executive education, she helps business leaders understand how sustainability contributes to competitive advantage. Her findings continue to influence corporate strategy worldwide.
She remains a critical voice in demonstrating the value of ESG integration.
22. Gail Whiteman
Gail Whiteman has distinguished herself through innovative approaches to climate communication and business engagement. Her Arctic-focused initiatives help decision-makers better understand the environmental and economic implications of climate change.
By connecting scientific research with business leadership, she encourages more informed decision-making around climate risks. Her work has become increasingly relevant as organizations seek to improve resilience and long-term planning.
Her contributions strengthen the connection between science and strategy.
23. Paul Hawken
Paul Hawken is one of the pioneering thinkers of the modern sustainability movement. Through decades of writing, entrepreneurship, and environmental advocacy, he has helped shape global conversations around regenerative business and climate solutions.
His Drawdown initiative remains one of the most comprehensive efforts to identify practical strategies for reducing greenhouse gas emissions. Hawken’s work emphasizes action, innovation, and measurable impact.
His influence continues to inspire leaders across sectors.
24. Yvon Chouinard
Yvon Chouinard has become a symbol of purpose-driven business leadership. As founder of Patagonia, he demonstrated that commercial success and environmental stewardship can coexist.
His decision to transfer ownership of the company into structures designed to support environmental causes sparked worldwide discussion about the future of corporate governance. Patagonia’s ongoing environmental activism has reinforced his reputation as a sustainability pioneer.
His example continues to inspire entrepreneurs and business leaders globally.
25. Emma Stewart
Emma Stewart has emerged as a leading practitioner of corporate sustainability implementation. Through her work in technology and entertainment industries, she has addressed the operational challenges associated with reducing environmental impacts at scale.
Her expertise spans carbon management, sustainable operations, and organizational transformation. By sharing practical insights from large organizations, Stewart provides valuable guidance for sustainability professionals worldwide.
Her contributions highlight the importance of execution in achieving sustainability goals.
Conclusion
The sustainability and ESG landscape continues to evolve rapidly as organizations face increasing expectations from investors, customers, regulators, and communities. The leaders featured on this list have helped shape the direction of climate action, responsible investment, sustainable business, and environmental innovation during a period of significant global change.
Through research, advocacy, policy leadership, corporate transformation, financial stewardship, and public education, these individuals continue to influence how businesses and societies address some of the most important challenges of our time. Their collective efforts are helping define the future of sustainability in 2026 and beyond.
