Richemont

In 2007 WWF-UK analysed and ranked the 10 largest publicly-traded luxury brand-owners on their environmental, social and governance (ESG) performance. (Listed under information due to age of report)
Source: WWF UK (2007)

In this 2012 report on the ethical performance of ten luxury jewellery brands, Richemont subsidiary Cartier was found to be the only brand significantly active in addressing their social responsibilities.
Source: Uplifting the Earth report (2011)

This company's subsidiary, Cartier, is a certified member of the Responsible Jewellery Council (RJC). Certification under the RJC system demonstrates that the Member's business practices conform to RJC's Code of Practices for business ethics, human rights, social and environmental performance.
Source: Responsible Jewellery Council (2019)

Human Rights Watch's 2020 report, "Sparkling Jewels, Opaque Supply Chains" scrutinizes and ranks 15 major jewelry companies for their efforts to prevent and address human rights abuses in their gold and diamond supply chains between 2018 and 2020. This company was ranked 'Moderate': has taken some important steps towards responsible sourcing.
Source: Human Rights Watch (2020)

The 2020 Fashion Transparency Index reviewed 250 of the world's largest fashion brands and retailers and ranked them according to how much they disclose about their social and environmental policies, practices and impacts. Brands owned by this company scored 20%, signifying it is doing a bit more than the others when it comes to having policies and commitments in place and auditing and reporting activities, but could be doing more. The average score was 23% and the highest score was 73%.
Source: Fashion Revolution (2020)