Noble Plains drills one ft of 0.97% eU3O8 at Duck Creek

Mr. Drew Zimmerman reports NOBLE PLAINS URANIUM COMPLETES TRANSFORMATIONAL DUCK CREEK DRILL PROGRAM AS PROJECT ADVANCES TOWARD FIRST COMPLIANT RESOURCE Noble Plains Uranium Corp. has released the final set of drill results from its completed 148-hole, 30,825-foot drill program at its flagship Duck Creek project in Wyoming's Powder River basin. "This drill program has exceeded our expectations across the board," said Drew Zimmerman, chief executive officer of Noble Plains Uranium. "We confirmed historic data, expanded the mineralized footprint, delivered multiple program-high grades and achieved a 90-per-cent hit rate across 148 holes, all in under six months of acquisition. Duck Creek has gone from an overlooked historical asset to a project with the scale, continuity and grade profile to support a meaningful resource this spring. This program is how we build out real uranium pounds in premier U.S. jurisdictions at a time when domestic supply of this critical mineral has never been more urgent." This final batch delivered some of the strongest results of the entire program and caps a drill campaign that has consistently exceeded expectations. Hole 25-16-140 returned 17.5 feet of 0.235 per cent equivalent triuranium octoxide, including 2.0 feet grading 1.00 per cent eU3O8 and 1.0 foot at 1.49 per cent eU3O8. Hole 25-28-143 intersected 9.0 feet of 0.228 per cent eU3O8, including 5.5 feet at 0.362 per cent eU3O8 and 1.0 foot at 0.972 per cent eU3O8. Importantly these high-grade intercepts continue to occur within the same laterally continuous roll-front system that has been traced across the property. Rather than isolated high-grade hits, these results sit within a broader, predictable mineralized corridor that is ideally suited to in situ recovery extraction. Beyond the individual highlights, the significance of this program lies in the consistency and reproducibility of the results. A total of 148 holes were completed, every planned confirmation hole twinned historic drilling, and 90.12 per cent of all holes intersected uranium mineralization at or above the 0.02 per cent eU3O8 cut-off grade. As drilling progressed northward, strong intercepts continued to be encountered, directly supporting the company's recent 2.25-mile expansion of the project footprint along trend. In the past six months, Noble Plains progressed Duck Creek from the closing of the acquisition, through permitting, to the completion of a highly successful drill program that provides a robust data set to support a resource estimate in compliance with NI 43-101 standards this spring. This is the company's strategy in action: not grassroots exploration, but the disciplined conversion of known historical mineralization into newly defined, compliant uranium pounds in the ground. Northern drilling confirms trend continuity and supports land expansion The final holes were drilled toward the northern end of the historic uranium trend and continue to demonstrate strong continuity of mineralization. Importantly, several of the strongest intercepts of the entire program came from this area, providing geological support for the continuation of the system onto the company's recently staked northern claims toward known uranium resources held by Uranium Energy Corp. "The strength and continuity of the results of this program are extremely important because they occur along the same historic trend that originally drew us to Duck Creek, and they are confirming that the roll-front system is both continuous and capable of hosting higher-grade centres within that continuity," said Paul Cowley, PGeo, chief operating officer of Noble Plains Uranium. "Across 148 holes, we have consistently reproduced and expanded upon the historic data, with grades and thicknesses that validate our geological model. The strength and predictability we are seeing along this trend gives us a high level of confidence that the system is likely to continue onto our newly staked northern ground. This is exactly the type of geological consistency you want to see when advancing a project toward a scalable ISR uranium resource." Fort Union formation test Three broad-spaced deeper holes were drilled to test the Fort Union formation beneath the Wasatch, where neighbouring deposits host significant resources. The goal of the deeper holes was to confirm the existence of Fort Union sand body deposition and gather information on the strike and location of the redox front. All three holes penetrated the S, Q, O4 and O3 sands of the Fort Union formation. The drilling confirms the presence of thick sections of coarse-grained clean host sands of the Fort Union formation on the property; however, the location of the anticipated roll front within these sands remains to be determined with future drilling and remains a large opportunity to explore on the property. This summer, the company is partnering with the University of Wyoming on testing geophysical methods to identify roll fronts at depth. With such a large area to test on the property for roll fronts in the Fort Union, these geophysical methods will help focus more efficient drill testing. Path toward a compliant resource With drilling complete, the company's focus turns to final database compilation and geological modelling work already under way. Noble Plains expects to deliver its first compliant uranium resource at Duck Creek this spring, establishing a strong base of value from which to continue expanding the project along its now five-mile trend. Duck Creek remains central to Noble Plains' strategy of building a growing inventory of U.S. uranium pounds in proven production districts, positioning the company to benefit from a strengthening uranium price environment and increasing U.S. government support for domestic critical mineral supply. Details of the drilling program The geophysical results are based on equivalent uranium 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 grade thickness greater than 0.2. The drilling was done by Tyler Exploration Inc. utilizing a truck-mounted mud-rotary rig and the downhole geophysical logging by Hawkins CBM Logging, both of Wyoming. Bradley Parkes, PGeo, vice-president, exploration, and Paul Cowley, PGeo, chief operating officer for Noble Plains Uranium, supervised the drilling activities. 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 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. 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. Bradley Parkes, PGeo, VP, exploration, of Noble Plains, is the qualified person as defined in National Instrument 43-101, who has read and approved the technical content of this news release. We seek Safe Harbor.