LARGE BUSNESS https://cr.hilton.com/wp-content/uploads/https://ir.hilton.com/financial-reporting/sec-filings https://cr.hilton.com/wp-content/uploads/2019/03/2018_Hilton_LightStay.pdf https://cr.hilton.com/our-reporting/#assurance In 2009, Hilton launched LightStay, our award-winning corporate responsibility measurement platform that enables us to track our environmental and social impact across our global portfolio of managed and franchised hotels.