1. AECOM
2. Alliant Energy Corp.
3. American Electric Power Company Inc.
4. Babcock International Group PLC
5. Bechtel Corporation
6. Berghof Products + Instruments GmbH
7. Dominion Energy Inc.
8. ENEL S.p.A
9. Holtec International Inc.
10. James Fisher and Sons PLC
11. Mitsubishi Heavy Industries
Ltd.
12. Northstar Group Services Inc.
13. NuScale Power
LLC
14. Ontario Power Generation Inc.
15. Studsvik AB