Global Reporting Initiative

Merck reports in accordance with the Global Reporting Initiative (GRI) G3.1 guidelines on our corporate responsibility (CR) website.

The voluntary guidelines offer a useful framework for transparent reporting about environmental, social and governance performance. Greater transparency on such matters is beneficial to our business because it helps to inform our stakeholders and also enables us to compare performance with that of peers on relevant metrics. We believe that this will help us focus on continuously improving the things that matter most.

This report has been prepared according to the GRI Guidelines, at Application Level A.

The table below summarizes where the disclosures can be found on the Merck website.

GRI Index 2011 10-K 2011 10-K USA.gov Merck Compliance 2011 10-K Business Partner Code of Contact Business Partner Code of Contact Business Partner Code of Contact Business Partner Code of Contact Business Partner Code of Contact 2011 10-K CDP Report CDP Report CDP Report CDP Report CDP Report CDP Report Supporting Our Communities Our Business Giving at Merck Foundation Community Education Access to Health Access to Health Diversity and Inclusion External Supplier Network Supplier Diversity Energy Use and Climate Change Community Product Donations Our Business Positive Word Environment Our Business Sales and Marketing Sales and Marketing Sales and Marketing Sales and Marketing Sales and Marketing Quality and Safety Standards Research and Development Manufacturing & Supply Quality and Safety Standards Quality and Safety Standards Quality and Safety Standards Product Stewardship Ethics & Transparency Public Policy and Advocacy EHS Management and Compliance Ethics & Transparency Code of Conduct Information and Interaction Information and Interaction Code of Conduct Sales and Marketing Environmental Risk Assessments Community Training and Education Positive Work Environment EHS Management and Compliance Privacy Program Office of Ethics Employee Health Employee Safety Employee Health Wellness Compensation and Benefits Economic Impact Positive Word Environment Positive Word Environment Office of Ethics Supply Chain Code of Conduct Office of Ethics Office of Ethics External Supplier Network External Supplier Network Energy Use & Climate Change Pharmaceuticals Pharmaceuticals Risk Assessments Risk Assessments Transparency Disclosures Transparency Disclosures Transparency Disclosures Transparency Disclosures Transparency Disclosures Transparency Disclosures Energy Use & Climate Change Transparency Disclosures Energy Use & Climate Change Transparency Disclosures Energy Use & Climate Change Energy Use & Climate Change Transparency Disclosures Energy Use & Climate Change Water Water Manufacturing & Supply Patient Safety Patient Safety Sales & Marketing Ethics & Transparency Human Rights Human Rights Human Rights Human Rights Human Rights Human Rights Human Rights Management & Compliance Emissions, Effluents & Waste Emissions, Effluents & Waste Emissions, Effluents & Waste Emissions, Effluents & Waste Product Stewardship Management & Compliance Emissions, Effluents & Waste Energy Use & Climate Change Waste Water Product Stewardship Pharmaceuticals Product Stewardship Our Goals Management & Compliance Packaging Human Rights Diversity & Inclusion Training and Education Sales and Marketing Positive Work Environment Ethics & Transparency Supporting our Communities Code of Conduct Patient Safety Information and Interaction Sales & Marketing Product Stewardship Manufacturing & Supply Privacy Program

GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures GRI Disclosures