This Amendment No. 3 on Schedule 13D/A (this "Amendment No. 3") is being filed jointly by (i) Fluor Corporation, a Delaware corporation and a publicly listed company on the New York Stock Exchange ("Fluor"), (ii) Fluor Enterprises, Inc., a California corporation ("Fluor Enterprises") and wholly owned subsidiary of Fluor, and (iii) NuScale Holdings Corp., an Oregon corporation ("NuScale Holdings", together with Fluor Enterprises and Fluor, the "Reporting Persons"). This Amendment No. 3 amends and supplements the Schedule 13D previously filed by the Reporting Persons on May 12, 2022, as amended by Amendment No. 1 filed on November 3, 2022 and Amendment No. 2 filed on August 1, 2025 (the "Original Filing"), with respect to the Class A Common Stock of NuScale Power Corporation (the "Issuer"). The Items below amend and supplement the information disclosed under the corresponding Items of the Original Filing. Item 4 is hereby amended and supplemented to add the following: As previously disclosed, on August 12, 2025, Fluor Enterprises exchanged 15,000,000 Class B common units of NuScale Power, LLC (together with the cancellation of 15,000,000 shares of Class B Common Stock) for 15,000,000 shares of Class A Common Stock pursuant to that certain Exchange and Lock-Up Agreement, dated as of July 31, 2025, by and among NuScale Power Corporation, NuScale Power, LLC and Fluor Enterprises (the "Exchange and Lock-Up Agreement"), which is referenced herein as Exhibit 10 to Amendment No. 2 filed on August 1, 2025 and incorporated by reference. Following the expiration of the initial lock-up period under the Exchange and Lock-Up Agreement, Fluor Enterprises commenced sales of Class A Common Stock on Tuesday, September 16, 2025, in transactions permitted by, and effected in compliance with, the Exchange and Lock-Up Agreement (including, from and after September 11, 2025, the daily volume limitations described therein). As a result of such sales, the Reporting Persons' percentage beneficial ownership of the Issuer's outstanding equity securities has decreased from that previously reported and may continue to decrease as additional sales are made from time to time in accordance with the Exchange and Lock-Up Agreement.