Cautionary Note Concerning Disclosure of Mineral Resources: 

The mineral resource estimates contained in our Technical Reports have been prepared in accordance with U.S. securities laws pursuant to Regulation S-K, Subpart 1300 (“S-K 1300”) and are supported by initial assessments prepared in accordance with the requirements of S-K 1300.

Our estimates of mineral resources and related analyses are also prepared in accordance with Canadian National Instrument 43‑101 Standards of Disclosure for Mineral Projects (“NI 43‑101”) and the Canadian Institute of Mining, Metallurgy and Petroleum Definition Standards for Mineral Resources and Mineral Reserves.

The Lost Creek Report, linked above, is prepared pursuant to both S-K 1300 and NI 43-101. The Shirley Basin Reports that are linked above (for each of NI 43-101 and S-K 1300) are substantially the same except for internal references to the regulations under which the report is made, and certain organizational differences.

Please review and consider our Cautionary Note to Investors Concerning Disclosure of Mineral Resources contained in our Annual Report on Form 10-K filed on March 10, 2026, with the U.S. Securities and Exchange Commission on EDGAR at www.sec.gov/edgar.shtml and with Canadian securities authorities on SEDAR+ at www.sedarplus.ca.