Mr. Drew Zimmerman reports

NOBLE PLAINS URANIUM DELIVERS HIGHEST-GRADE INTERCEPT TO DATE AS DUCK CREEK DRILLING CONTINUES TO CONFIRM CONTINUITY

Noble Plains Uranium Corp. has released results from the next 20 drill holes completed at its flagship Duck Creek project in Wyoming's Powder River basin, highlighted by the highest-grade uranium intercept recorded to date and continued strong mineralization across the roll-front system.

The strongest result of the drill program to date was returned from hole 25-21-096, which intersected 35.5 feet of 0.202 per cent eU3O8, including a high-grade core of 4.0 feet at 0.501 per cent eU3O8, a standout intercept for a Wyoming roll-front system. Additional strong results further demonstrate the consistency of mineralization encountered at Duck Creek, including 26.5 feet of 0.083 per cent eU3O8 with 4.0 feet at 0.144 per cent eU3O8 in hole 25-21-095. Hole 25-21-089 intersected 25.0 feet of 0.069 per cent eU3O8, including 4.0 feet at 0.17 per cent eU3O8, and hole 25-21-090 intersected 17.5 feet of 0.09 per cent eU3O8, including 2.0 feet at 0.217 per cent eU3O8.

Importantly, these results continue to align closely with the company's geological model, with this set of holes hitting uranium mineralization meeting or exceeding industry-standard thresholds for ISR-amenable (in situ recovery) deposits in Wyoming with a success rate of 80 per cent. Together, these results reinforce both the quality of the Duck Creek system and the growing confidence in its potential to support a meaningful uranium resource.

"The combination of consistent mineralization and a standout 0.50 per cent eU3O8 intercept underscores the quality of the Duck Creek system," said Drew Zimmerman, chief executive officer of Noble Plains Uranium. "These results reinforce our confidence that Duck Creek can support a meaningful, scalable uranium resource. We are executing with discipline to convert drill results into future pounds in the ground, positioning Noble Plains to deliver leverage in a U.S. uranium market where secure domestic supply is becoming increasingly critical."

"The highest-grade intercept of the program to date is important because it sits within a long, continuous zone of uranium mineralization, rather than being an isolated hit. This tells us the system is not only extensive, but also capable of hosting higher-grade pockets within that broader trend, exactly what you want to see in an ISR-amenable uranium deposit," said Paul Cowley, PGeo, chief operating officer of Noble Plains Uranium. "To date, we have now twinned 16 historic holes that have delivered reproducible results giving confidence to historic drilling. With just over two-thirds of the planned program completed, the consistency of our results continues to build confidence in our ability to define a meaningful, scalable uranium resource at Duck Creek."

Next steps and outlook

With roughly two-thirds of the planned drilling now complete, Noble Plains believes Duck Creek continues to derisk rapidly as a future uranium resource. The consistency of mineralization, increasing confidence in grade continuity, and emergence of higher-grade zones collectively support the company's objective of delivering its first National Instrument 43-101-compliant uranium resource later this spring. As drilling continues, the company expects additional results to further refine the scale and quality of mineralization while maintaining strong momentum toward resource definition.

Duck Creek remains central to Noble Plains' strategy of building a growing inventory of United States-based uranium pounds in known production areas that is positioned to benefit from a strengthening uranium price environment and increasing focus on domestic critical mineral supply.

Continuing drill program overview

The Duck Creek drill program, permitted for up to 37,400 ft across approximately 150 holes, is structured around three key objectives:

1. Confirmation of historical data -- 16 holes: to verify 1,317 historical intercepts in the Wasatch formation and support a uranium resource prepared in accordance with National Instrument 43-101 standards;
2. Expansion of shallow mineralization -- approximately 130 holes: designed to extend mineralized boundaries and target higher-grade areas along the three-mile-long Wasatch roll-front corridor;
3. First-ever drilling of the Fort Union formation -- approximately 10 holes: for the first time, Noble Plains will drill to approximately 1,200 feet to test the Fort Union, where neighbouring projects host the majority of their compliant resources.

The company filed a technical report, available on SEDAR+ under the company's profile, on the Duck Creek project on Aug. 14, 2025, which outlined an exploration target ranging from 2.37 million tons at 0.03 per cent U3O8 to 5.45 million tons at 0.05 per cent U3O8. These ranges were based on assumed grade-thickness (GT) values of 0.2 for the lower case and 0.598 for the upper case. The exploration target is conceptual in nature and does not meet the standards to be classified as mineral resources or mineral reserves, and there is no certainty that the exploration target will be realized.

Details of the drilling program

The geophysical results are based on equivalent uranium (eU308) of the gamma-ray probes calibrated at the Department of Energy's test facility in Casper, Wyo. A geophysical tool with gamma-ray, spontaneous potential, resistivity and drift detectors was utilized. The reader is cautioned that the reported uranium grades may not reflect actual concentrations due to the potential for disequilibrium between uranium and its gamma-emitting daughter products. The drill results were determined using thickness and grade per cent cut-offs of two feet, 0.02 per cent eU308 and GT of more than 0.2.

The drilling is being done by Tyler Exploration Inc. utilizing a truck-mounted mud rotary rig and the geophysical logging by Hawkins CBM Logging, both of Wyoming. Bradley Parkes, PGeo, vice-president of exploration, and Paul Cowley, PGeo, chief operating officer for Noble Plains Uranium, supervised the drilling activities.

About Noble Plains Uranium Corp.

Noble Plains Uranium is a United States-focused uranium exploration and development company advancing a portfolio of high-potential projects amenable to ISR -- the most capital-efficient and environmentally responsible method of uranium extraction. The company's 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.

Bradley Parkes, PGeo, vice-president of exploration of Noble Plains Uranium, is the qualified person as defined in National Instrument 43-101, who has read and approved the technical content of this news release.

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