There are several ways to evaluate the top companies with significant corporate social responsibility (CSR) initiatives, and the rankings may vary depending on the criteria used. However, based on various sources and their CSR initiatives in recent years, here is a list of ten companies known for their significant CSR efforts:

1. Microsoft
2. Google
3. Amazon
4. Apple
5. Salesforce
6. Intel
7. Unilever
8. Procter & Gamble
9. Walmart
10. CVS Health

It is important to note that CSR initiatives can vary across industries and regions, and there are many other companies actively engaged in CSR activities.