The Global Reporting Initiative (GRI) provides sustainability reporting guidelines that are voluntarily adopted by organizations worldwide. The number of organizations publishing GRI-based reports has grown significantly since 1999. The G3 Guidelines, released in 2006, feature streamlined performance indicators and disclosures to improve comparability across reports. The GRI framework includes sector supplements and national annexes to address specific reporting needs. Organizations are encouraged to use the GRI Guidelines and provide feedback to help further develop the reporting standards.