8-K filed November 6, 2025, 6:59 PM ET ticker USAR CIK 0001970622

other confidence high sentiment neutral materiality 0.30

USA Rare Earth appoints BDO as new auditor after Horne LLP resignation

USA Rare Earth, Inc.

Horne LLP resigned as independent auditor effective Nov 1, 2025, after its partners and staff joined BDO USA, P.C.
Audit Committee appointed BDO USA, P.C. as successor independent registered public accounting firm effective same date.
No adverse opinions, disagreements, or reportable events were reported for fiscal years 2024 and 2023.
Company provided Horne with copy of 8-K; Horne's letter agreeing with statements is filed as Exhibit 16.1.

item 4.01 item 9.01

Machine-readable event card

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accession: 0001970622-25-000072
form_type: 8-K
ticker: USAR
cik: 0001970622
company_name: USA Rare Earth, Inc.
filed_at: 2025-11-06T23:59:59+00:00
discovered_at: 2026-05-14T18:02:41.179170+00:00
generated_at: 2026-05-17T00:02:43.483523+00:00
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Source-grounded claims

47e0814574fbacecbd3409948e4cd435feef6358

Horne LLP resigned as auditor of USA Rare Earth, Inc..

Horne resigned as the Company’s independent registered public accounting firm effective as of November 1, 2025.

SEC 8-K Item 4.01/4.02 confidence 0.9 SEC evidence

4c28e775d7db4554cc6505a222502ddaaa087000

USA Rare Earth, Inc. engaged BDO USA, P.C. as its auditor.

the Company, through and with the approval of its Audit Committee, appointed BDO as its independent registered public accounting firm.

SEC 8-K Item 4.01/4.02 confidence 0.9 SEC evidence

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