USA Rare Earth, Inc.

Public companies file this within four business days when something important happens that investors should know about before the next quarterly report.

USA Rare Earth, Inc. filed this to release information to investors under Regulation FD — usually a press release, conference presentation, or other event the company considers important. htm UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS OF USAR AS OF AND FOR THE THREE MONTHS ENDED MARCH 31, 2026, AND FOR THE YEAR ENDED DECEMBER 31, 2025 Exhibit 99. 1 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL information Introduction The following unaudited pro forma condensed combined financial information is derived from the historical…