 The science-based targets initiative, SBTI, and RE100 have been gaining momentum in recent years, with many large corporations joining both initiatives. Studies suggest that these initiatives can help to reduce greenhouse gas emissions beyond national goals. However, there has not yet been much research into how these companies are actually meeting their targets. This study examined the progress made by 102 of the largest companies in terms of scope 1 and 2 emissions from 2015 to 2019. The results showed that overall, these companies reduced their emissions by 35.6%. However, this reduction was largely due to a few large companies, while smaller companies did not make any noticeable progress. Additionally, most of the emissions reductions were achieved through renewable energy purchases rather than through operational changes. Furthermore, only 75% of the data was independently verified, and 71% of the renewable energy was obtained through low-impact or undisclosed sources. These findings suggest that more work needs to be done to ensure that these initiatives are truly effective in reducing emissions.