1. AB Volvo
2. BYD Company Limited
3. Proterra Inc.
4. Solaris Bus & Coach S.A.
5. Zhengzhou Yutong Bus Co. Ltd
6. Ashok Leyland Limited
7. Daimler AG
8. EBUSCO B.V
9. Tata Motors Limited
10. Zhongtong Bus Holding Co. Ltd.