Signature Resources reports final Joutel drill results; begins regional prospecting

Toronto, Ontario--(Newsfile Corp. - August 10, 2026) - Signature Resources Ltd. (TSXV: SGU) (OTCQB: SGGTF) (FSE: 3S30) ("Signature" or the "Company") is pleased to announce results from the final three diamond drill holes ("DDHs") in the 2025-26 drill program, which tested the western extension of the Lingman Lake deposit. All three DDHs intersected the structural zones predicted by the Company's geological model and all three contained gold.

The winter drill program, shown in Figure 1, consisted of nine holes totaling 4,006 metres ("m") and was completed in early May. The program was designed as a significant step-out exploration program to test the deposit at depth east of the diabase dyke and the strike extension of the gold zones west of the dike The results are significant because they support continuity of structure, mineralization at depth, validate the current geological model, and help define priority targets for future drilling designed to expand the Lingman Lake mineralized envelope.

Figure 1: Plan view of drill program.

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We believe this program has increased our understanding of the mineralization of this deposit and highlighted a large undrilled area that could significantly expand the resource at the Lingman Lake Gold Deposit. It has also improved targeting for future drill programs and provided guidance for prospecting work. Surface work has already begun with a number of surface samples showing the potential of the 32-kilometre greenstone belt.

J. Dan Denbow, CFA - President, CEO and Director

Results of drilling west of diabase dike

The Company drilled three DDHs west of the dike to explore the lateral extension of the West and Central gold zones, as shown in Figure 1. Each zone was intercepted as predicted by the geological model, with the DDHs shown in Figure 2. These targets were developed using a 3D Alpha IP survey that indicated a strong correlation between high chargeability and low resistivity. While the structures were intercepted and the core appeared visually prospective, the mineralization intercepted was generally anomalous but low grade.

Figure 2: Section showing drill traces for LM 25-06, LM 25-07 and LM 25-08

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LM 25-06 1 was drilled to a total depth of 200 m on the same section as LM 25-07. Based on core observations the Central Gold Zone ("CZ") was intercepted very near surface beginning at 11 metres and occurs as two distinct zones, the CZ-A and CZ- B, which combined occur for 16 metres ending at 27 m for an average grade of .11 grams per tonne of gold ("g/t Au"). This included a one-metre intercept from 16 m to 17 m grading 1.10 g/t Au in the CZ-A zone and one metre in CZ-B from 23 m to 24 m grading 0.22 g/t Au. This hole intercepted the leopard rock (typical footwall unit of the northly zones) at 132 m and it continued for the remainder of the hole which is a wider than normal.

LM 25-07 2 was drilled to a total depth of 371 metres to test the heart of the anomaly identified in the IP study and first encountered the CZ-A at 95 m continuing to 107 m as observed in the core. The average grade for the 12 m intercept is 0.07 g/t Au, including a one-metre intercept at 102 metres grading 0.25 g/t Au. CZ-B was observed beginning at 130 m continuing for seven metres with an average grade of 0.10 g/t Au including one metre intercepts grading 0.21 g/t at 130 m and 0.34 g/t Au at 132 m. The West zone began at 250 m for 30 m with an average grade of 0.06 g/t Au. This included a three-metre section from 267 m to 270 m with an average grade of 0.27 g/t Au. The footwall was intercepted at 333 m.

LM 25-08 3 was drilled to a depth of 410 m at a dip of -55.3 degrees. A short intersection of the Central zone occurred at 164 m for three metres with an average grade of 0.17 g/t Au. The West zone was encountered at 277 m for 16 metres with an average grade of 0.07 g/t Au including three metres with an average grade of 0.20 g/t Au. The footwall was intercepted at 349 m.

Conclusions from the 2025-2026 Drill Program

There are a number of key observations that we take away from the most recent exploration program which has contributed to expanding our knowledge of the Lingman Lake Deposit. All of these observations will serve to underpin our future drilling plans and other geophysical or geochemical studies that we can complete to help targeting for higher grade mineralization.

Structural controls remain consistent. All the DDHs in this program have confirmed the geologic model with structural deformation and alteration holding up across the Lingman Lake Deposit.

Structure is not the only control. Structure has been very consistent and appeared to be the predictor of grade but drilling further from the original workings demonstrate the correlation of higher grade in proximity to the quartz feldspar porphyry ("QFP") east of the diabase dike. QFP has not been observed in the drill core west of the dike where higher grade has been reported.

Types of deformation appear key to grade. Areas that exhibit of brittle-ductile deformation along the deposit show variable grades versus areas combined with silica flooding show higher grades.

Signals from Molybdenite. Trace molybdenite mineralization which is hosted by quartz veining along the deposit's footwall implies a high temperature fluid and thermal input from granitoid intrusions to the mineralization event. This suggests a fluid overprint onto the shear system from the QFP resulting in areas of higher-grade gold mineralization.

Significant targets identified at depth. The program has identified a westerly plunge to the deposit opening a large untested area. Target Areas A and D seen in Figure 3 on both sides of the dike that can extend the resource significantly at depth. In addition, a largely undrilled area, Target Area B, which is above the identified deeper targets could also be quite additive to the resource. Figure 4 shows a cross section of the target area and exhibits the depth of this new area compared to the historic drilling on the property.

Figure 3: Opportunities to Infill at Depth - Longitudinal Section

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Figure 4 - Cross Section View Highlighting Target Area A

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Prospecting Program on the Regional Claims

Signature maintains a very large land package covering 85% of the Lingman Lake Greenstone belt. The Company has begun a 30-day prospecting program that will investigating an area 15 km to west of the Lingman Lake deposit. Prior airborne geophysical surveys that we have completed have been overlayed with historical results from prospecting work mostly completed in the 1960’s and 1970’s with a small amount from the early 1980’s, which point to this being a highly prospective area. Historical records are very high-level but our compilation efforts document a number of base metal and gold showings aligned in a curvilinear trend south mirroring the regional-scale contact between Lingman Greenstone Belt and granites. This area is being referred to as Area 5 for this work program. There are records of past sampling, shallow blast trenching and even some small diameter (21.5 and 30.1 mm) drilling that we have been able to incorporate in our database. We will be targeting to work around the areas of historical activity and their relationship to structures as currently interpreted from airborne geophysical surveys. The program consists of initial mapping, prospecting and sampling to confirm and provide context for historical results and to select areas for follow-up work. Figure 5 shows the area that this program will be covering and the location of some of the noted historical activities.

Figure 5 - Mapping-Prospecting-Sampling Program on Area 5.

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Emerging Growth Conference Presentation

The Company will be presenting at the Emerging Growth Conference, August 19, 2026 at 1:45 pm Eastern. We will provide an update on the recent exploration activities for Signature and answer any questions on the recent work and the ongoing field program. You can register for the presentation here .

Qualified Person

The scientific and technical content of this press release have been reviewed and approved by Mr. Walter Hanych, P. Geo, consultant and Head Geologist, is a Qualified Persons under NI 43-101 regulations.

Quality Assurance and Quality Control

Signature Resources maintains an industry standard Quality Assurance/Quality Control (QA/QC) program at the Lingman Lake Project to ensure sampling and analysis of all exploration work is conducted in accordance with best practices. John Siriunas, P. Eng. is the independent Qualified Person under 43-101 who monitors and scrutinizes the results of the QA/QC program.

Assay results from SGS's Burnaby lab for gold and multi-element are directly e-mailed to three individuals: Dan Denbow, President and CEO of Signature Resources, Walter Hanych, P. Geo. consultant to the Company, and John Siriunas, P. Eng. independent consultant to the company.

SGS is a certified laboratory and also has internal quality control ("QC") programs that include insertion of reagent blanks, reference materials, and pulp duplicates. The Corporation inserts QC samples (blanks and reference materials) at regular intervals to monitor laboratory performance. SGS Canada is the Canadian division of the world's leading testing, inspection, and certification company. It provides independent testing and assurance of quality of samples for Signature Resources Ltd.

The nominal sampling interval for analyses is one (1) metre and the core was diamond-saw cut (half for sample purposes, half retained for archival purposes) on site to provide a sample of approximately 2.40 kilograms of material per one metre of half NQ-size core. Prior to sampling, all cores are photographed for archival purposes in sets of three boxes per photo with separate wet and dry versions of each set.

The SGS laboratories carry out the sample login/registration, sample weighing and sample preparation (G_CRU21 - crush to 75% passing 2 millimetres and G_PUL45 - pulverize 250 grams using Cr-steel bowl to 85% passing 75 micrometres). Gold analyses were performed by (GE_FAA313 - fire assay pre-concentration with AAS finish or for over limit results of >10.000 g Au/t, GE_FAG303 - fire assay pre-concentration with a gravimetric finish). The SGS laboratory in Vancouver, British Columbia performed multi-element analyses for 51 elements (GE_ICM14B - aqua regia digestion with an ICP-AES or -MS finish). Over limit analyses for Ag (GO_ICP13B - aqua regia digestion with an ICP-AES finish) and As or Zn (GO_ICP90Q - sodium peroxide fusion with an ICP-AES finish) were performed as required.

SGS Red Lake, Val-d'Or and Vancouver are accredited for CAN-P-1579 Requirements for Accreditation of Mineral Analysis Testing Laboratories and CAN-P-4E (ISO 17025: 2005) General Requirements for the Competence of Testing and Calibration Laboratories. SGS Red Lake is accredited for three tests: Au by fire assay (GE_FAA_313 and GO_FAA_303) and Au by gravimetrics (GO_FAG_303). SGS Vancouver is accredited for 13 tests including multi-elements by aqua regia (GE_ICM14B).

About Signature Resources Ltd.

The Company is a Canadian based advanced stage exploration company focused on expanding the 100% owned Lingman Lake gold deposit, located within the prolific Red Lake district in Northwestern Ontario, Canada. The Lingman Lake gold property (the "Property") consists of 25 single-cell and 159 multi-cell staked claims, four freehold fully patented claims and 14 mineral rights patented claims totaling approximately 23,033 hectares. The Property includes what has historically been referred to as the Lingman Lake Gold Mine, an underground substructure consisting of a 126.5-metre shaft, and 3-levels at depths of 46 metres, 84 metres and 122 metres. There has been over 43,222 metres of drilling done on the Property and four 500-pound bulk samples that averaged 19 grams per tonne of gold. The Company’s initial mineral resource estimate was published in the report entitled “NI 43-101 Technical Report on the Lingman Lake Property” dated May 31, 2025 prepared by Gehard Kiessling, P. Geo., Farshid Ghazanfari, P. Geo., Marin Drennan, P. Eng., Cameron Finlayson and Jeff Plate,CFA, P. Geo, of Watts, Griffis and McOuat Geological & Mining Consultants. The initial published mineral resource was estimated to contained 2.145 million tonnes of material grading 1.38 g/t Au for an estimated 95,200 ounces in the indicated category and 18.398 million tonnes of material with an average grade of 1.14 g/t Au for an estimated 674,320 ounces in the inferred category at a cutoff grade of 0.30 g/t. The Company is focused on rapidly expanding the known mineralized envelope with its 100% owned diamond drilling rigs. In November 2023, Wataynikaneyap Power energized a new 115kV high tension transmission line within 40 km of the historic Lingman Lake Mine ( https://www.wataypower.ca/ ).

To find out more about Signature, visit www.signatureresources.ca or contact:

Dan Denbow Chief Executive Officer (800) 259-0150 info@signatureresources.ca

or contact : Renmark Financial Communications Inc. John Boidman: jboidman@renmarkfinancial.com Tel: (416) 644-2020 or (212) 812-7680 www.renmarkfinancial.com

Cautionary Notes

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release.

This news release contains forward-looking statements which are not statements of historical fact. Forward-looking statements include estimates and statements that describe the Company's future plans, objectives or goals, including words to the effect that the Company or management expects a stated condition or result to occur. Forward-looking statements may be identified by such terms as "believes", "anticipates", "expects", "estimates", "may", "could", "would", "will", or "plan". Since forward-looking statements are based on assumptions and address future events and conditions, by their very nature they involve inherent risks and uncertainties. Although these statements are based on information currently available to the Company, the Company provides no assurance that actual results will meet management's expectations. Risks, uncertainties and other factors involved with forward-looking information could cause actual events, results, performance, prospects and opportunities to differ materially from those expressed or implied by such forward-looking information. Forward-looking information in this news release includes, but is not limited to, the Company's objectives, goals or future plans, statements, exploration results, potential mineralization, the estimation of mineral resources, exploration and mine development plans, timing of the commencement of operations and estimates of market conditions and risks associated with infectious diseases and global geopolitical events. Factors that could cause actual results to differ materially from such forward-looking information include, but are not limited to changes in general economic and financial market conditions, failure to identify mineral resources, failure to convert estimated mineral resources to reserves, the inability to complete a feasibility study which recommends a production decision, the preliminary nature of metallurgical test results, delays in obtaining or failures to obtain required governmental, environmental or other project approvals, political risks, inability to fulfill the duty to accommodate First Nations and other indigenous peoples, uncertainties relating to the availability and costs of financing needed in the future, changes in equity markets, inflation, changes in exchange rates, fluctuations in commodity prices, delays in the development of projects, capital and operating costs varying significantly from estimates and the other risks involved in the mineral exploration and development industry, and those risks set out in the Company's public documents filed on SEDAR. Although the Company believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information, which only applies as of the date of this news release, and no assurance can be given that such events will occur in the disclosed time frames or at all. The Company disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise, other than as required by law.

1 LM25-06 was drilled at an azimuth 359.9 degrees, dip -44.5 degrees, reported widths are drill intercepts (core lengths), computer modeling of true widths is pending, North Zone strikes at 093 degrees, Central Zone strikes at 087 degrees, South Zone strikes at 082 degrees, All zones dip steeply south 70-80 degrees. 2 LM 25-07 was drilled at an azimuth of 360 degrees at a dip of -59.1 degrees. Reported widths are drill intercepts (core lengths), computer modeling of true widths is pending, North Zone strikes at 093 degrees, Central Zone strikes at 087 degrees, South Zone strikes at 082 degrees, All zones dip steeply south 70-80 degrees 3 LM 25-08 was drilled at an azimuth of 11.36 degrees at a dip of -55.3 degrees. Reported widths are drill intercepts (core lengths), computer modeling of true widths is pending, North Zone strikes at 093 degrees, Central Zone strikes at 087 degrees, South Zone strikes at 082 degrees, All zones dip steeply south 70-80 degrees

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August 10, 2026 - 4:00 AM PDT

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