Mr. Drew Zimmerman reports

NOBLE PLAINS URANIUM FILES NI 43-101 TECHNICAL REPORT ON MAIDEN RESOURCE AT DUCK CREEK, WYOMING

Noble Plains Uranium Corp. has filed the National Instrument 43-101 technical report underpinning its maiden mineral resource estimate at the Duck Creek uranium project, as initially announced on April 23, 2026.

"In filing the full technical report, the data is now in the public domain for investors, analysts and institutions to review. We're proud of what WWC's independent work confirms: a resource that beat its own exploration target on every key metric, on roughly half of the land we now hold. This is a starting point, not a finish line. With approximately 2.75 miles of additional trend untested, we intend to keep building on this foundation," stated Drew Zimmerman, chief executive officer of Noble Plains Uranium.

The complete technical document, written by independent qualified person Christopher McDowell, PG, of WWC Engineering, is publicly available on SEDAR+ and the company's website, providing full transparency into the data, methodology and upside that define Duck Creek. The National Instrument 43-101 technical report titled "NI 43-101 Technical Report, Duck Creek Uranium Project, Converse County, Wyoming, USA," has been filed on SEDAR+.

Furthermore, an exploration target for the project is estimated at between 941 and 1,021,000 tons grading between 0.020 per cent and 0.052 per cent triuranium octoxide. The exploration target was prepared by WWC Engineering and is based on historical Kerr-McGee drill hole intercept data and trend mapping covering approximately 2.75 miles of mineralized strike on the company's expanded claim position that lies outside of, and along strike from, the area covered by the maiden mineral resource estimate. The lower and upper limits of the tonnage and grade ranges were derived by applying the GT sum contour method to the historical intercept data set, using the same assumptions adopted for the maiden resource estimate: a grade cut-off of 0.020 per cent triuranium octoxide equivalent, a GT cut-off of 0.20 and a one-foot minimum intercept thickness, with tonnage calculated using a bulk density of 16.6 cubic feet per ton. The exploration target relates exclusively to the Wasatch formation and does not include any potential of the underlying Fort Union formation.

The potential quantity and grade of the exploration target are conceptual in nature as exploration in these areas is insufficient to estimate a mineral resource. It is uncertain if further exploration will result in the exploration target being delineated as a mineral resource.

The filing of this technical report marks the completion of a foundational chapter for Duck Creek and sets the stage for the company's anticipated 2026 drill program, which will target conversion of the exploration target into resources and extension of the mineralized strike length. The project has potential to host mineralization in the deeper Fort Union formation, an entirely separate horizon not included in the maiden resource estimate, representing what the company believes to be an additional growth vector at Duck Creek.

Qualified person

Christopher McDowell, PG, a registered member of the Society for Mining, Metallurgy and Exploration (member No. 4311521), project manager at WWC Engineering, is the QP as defined in Canadian National Instrument 43-101, who has read and approved the technical content of this news release.

About Noble Plains Uranium Corp.

Noble Plains is a United States-focused uranium exploration and development company advancing a portfolio of high-potential projects amenable to in situ recovery -- the most capital-efficient and environmentally responsible method of uranium extraction. Its strategy targets historically drilled and underexplored assets in proven jurisdictions, with the objective of rapidly delineating NI 43-101-compliant resources and building a scalable inventory of domestic uranium.

We seek Safe Harbor.