There are many manufacturers of excavators around the world, but some of the top companies in the industry include:

1. Caterpillar Inc.
2. Komatsu
3. Hitachi Construction Machinery Co. Ltd
4. Liebherr
5. Volvo Construction Equipment
6. Doosan Infracore
7. JCB
8. John Deere
9. XCMG Group
10. Sany Heavy Industry Co. Ltd

This list is not exhaustive and the ranking may change according to time, location and market conditions. These companies are known for producing high-quality excavators that are widely used in various industries. Some companies are focusing on specific segments like mining, forestry, compact excavators and so on