Inclusion in the S&P Global Sustainability Yearbook is based on the S&P Global Corporate Sustainability Assessment (CSA). The CSA measures a company's performance on and management of material environmental, social and governance (ESG) risks, opportunities and impacts, making the link between sustainability and business strategies. Operating with sustainability at its heart CapitaLand Ascott Trust Management Limited and CapitaLand Ascott Business Trust Management Pte Ltd CEO Serena Teo remarked that sustainability lies at the core of all of their initiatives. She said: "As CLAS continues to expand as the largest lodging trust in Asia Pacific, we endeavour to grow responsibly. We integrate sustainability in every stage from investment to design, development and operations. We have established systems and processes to ensure that we are on track to achieving our rigorous sustainability targets.