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Orezone Reports Positive Drill Results at Bomboré Demonstrating Growth Potential Ahead of Mineral Resource and Reserve Update in Q1 2027

Drill Results Resource Estimates Exploration Programs

OREZONE GOLD CORPORATION 450-505 Burrard Street Vancouver, BC, V7X 1M3 T: 778-945-8977 [email protected]

Orezone Reports Positive Drill Results at Bomboré Demonstrating Growth Potential Ahead of Mineral Resource and Reserve Update in Q1 2027

August 11, 2026 – Vancouver, BC - Orezone Gold Corporation (TSX: ORE | ASX: ORE | OTCQX: ORZCF) (the “Company” or “Orezone”) is pleased to provide additional drill results from its Bomboré Gold Mine. The latest results are from multiple zones across the 14-kilometre-long reserve-defined Bomboré gold system.

Selected Drill Highlights1:

  • 2.97g/t over 34.0m (BBD1393) • 1.74g/t over 26.0m (BBD1437)

Incl. 4.50g/t over 7.0m Incl. 3.33g/t over 6.0m

  • 4.00g/t over 11.3m (BBD1409) • 8.34g/t over 6.0m (BBD1418)
  • 1.26g/t over 34.0m (BBD1430) • 1.39g/t over 19.0m (BBD1408)

Incl. 5.46g/t over 2.0m Incl. 4.97g/t over 3.0m

  • 4.28g/t over 11.0m (BBD1393) • 223.25g/t over 1.0m (BBD1437)
  • 9.14g/t over 3.30m (BBD1411) • 4.88g/t over 4.60m (BBD1414)
  • 1.64g/t over 15.0m (BBD1394) • 1.81g/t over 13.0m (BBD1392)
  • • 1.28g/t over 16.6m (BBD1402) 1.70g/t over 12.0m (BBD1430)

Patrick Downey, President and CEO, commented “These latest exploration drill results continue to demonstrate the growth potential at Bomboré, confirming the continuity of gold mineralization beyond the current Mineral Resources and Mineral Reserves.

Step-out drilling continues to highlight significant exploration upside along strike, demonstrated by follow- up drilling at P16, that confirmed the zone’s 600 metre strike extension and its overall sub-parallel orientation to the P17 high-grade trend. As with P17, the emerging P16 trend hosts notably higher-grade zones within a broader envelope of lower grade mineralization. Ongoing structural studies and future exploration drilling will focus on refining the controls and continuity of these higher-grade zones, which are potentially amenable to underground mining and could significantly enhance the production profile.

In addition to our successful expansion drilling programs, the 2026 resource definition program focused on converting Inferred Resource to the Indicated category, supporting a Mineral Resource and Mineral Reserve update which is expected to be released in the first quarter of 2027. The updated estimate will incorporate the results of approximately 100,000m of additional drilling, in addition to an adjusted cut-off grade reflective of current operating costs and higher gold prices. Given Orezone’s ongoing exploration success in extending mineralization to depth and along strike, we expect that the new estimate will yield a material increase to both Mineral Resources and Mineral Reserves, further extending the overall life-of- mine at Bomboré”.

1. Results are from multiple zones, are uncapped, and have variable true widths. See Section 2 of release for per zone estimated true widths.

Exploration Drilling Results

Follow-up drilling at P16 was successful in confirming the P16 strike extension, which has now been traced over 600 metres to the northeast of the established P16 Mineral Resource. This newly emerging trend is subparallel to the established P17 Trend, located approximately 1 kilometre to the southeast. As with the P17 Trend, P16 hosts notably higher-grade zones, with mineralization plunging at 25 degrees to the northnortheast, parallel to the axes of tight folds in quartz veins. Follow-up drilling at P16 will look to both delineate mineralization along the broader trend, as well as to further refine the continuity of the highergrade zones with increasingly tighter drill spacing.

The P16 strike extension is a significant discovery that has broader implications in terms of future resource growth within the Bomboré gold system. P16 strike extension was not previously recognized as a prospective target because of the approximately eight metres of Tertiary cover that masks the underlying mineralization. This recent finding opens up multiple areas under cover that were not previously advanced due to the absence of surficial geochemical anomalies.

P16 selected intercepts – 600 metres northeast of established P16 resource:

8.34g/t over 6.0m (BBD1418) 4.88g/t over 4.6m (BBD1414)

27.31g/t over 1.0m (BBD1405) 2.83g/t over 6.0m (BBD1405)

4.37g/t over 2.4m (BBD1422) 12.50g/t over 1.0m (BBC7353)

Previously reported – selected high-grade intercepts from P16 area:

10.63g/t over 14.0m (BBD0448) 16.50g/t over 5.0m (BBD0448)

9.03g/t over 12.0m (BBC3241) 6.69g/t over 15.5m (BBD0443)

5.91g/t over 15.0m (BBD0477) 7.82g/t over 9.0m (BBD0213)

58.91g/t over 3.0m (BBD0768) 25.87g/t over 1.0m (BBD0813)

Resource Definition Drill Results

For 2026, Orezone has budgeted approximately 65,000m of drilling at Bomboré, with 45,000 metres dedicated to resource definition drilling. The definition program follows more recent 100 metre-spaced step-out drilling, which was successful in extending gold mineralization below several of the current lifeof-mine resource pits. Targeted infill drilling is expected to expand the existing resource base, with future pit optimizations potentially extending pit boundaries further down depth and along strike.

Further to the planned 2026 step-out and resource definition drill programs, mineralization at Bomboré remains open at depth and along strike. To date, the broader mineralized system has been traced across a continuous 14-kilometre strike length, with Mineral Reserves to an average depth of less than 40 metres and Mineral Resources to an average depth of approximately 70 metres. Future definition drilling at Bomboré will be focused on delineating higher-grade centers of mineralization, with the potential to be sequenced into the near-term mine plan,supporting further growth in production and operating cash flow.

  • 2 -

North Zone selected intercepts:

2.97g/t over 34.0m (BBD1393) 1.64g/t over 15.0m (BBD1394)

Incl. 4.50g/t over 7.0m Incl. 2.31g/t over 4.0m

4.28g/t over 11.0m (BBD1393) 1.06g/t over 31.2m (BBD1394)

1.81g/t over 13.0m (BBD1392) Incl. 2.62g/t over 4.0m

1.05g/t over 12.4m (BBD1395) 3.27g/t over 5.0m (BBC7295)

P17 selected intercepts:

1.26g/t over 34.0m (BBD1430) 1.39g/t over 19.0m (BBD1408)

Incl. 5.46g/t over 2.0m Incl. 4.97g/t over 3.0m

4.00g/t over 11.3m (BBD1409) 9.14g/t over 3.3m (BBD1411)

1.70g/t over 12.0m (BBD1430) 4.92g/t over 3.0m (BBD1429)

Siga selected intercepts:

1.74g/t over 26.0m (BBD1437) 1.08g/t over 27.2m (BBD1438)

Incl. 3.33g/t over 6.0m Incl. 1.60g/t over 13.0m

223.25g/t over 1.0m (BBD1437) 2.96g/t over 7.0m (BBD1440)

1.09g/t over 13.4m (BBD1439)

P8P9 selected intercepts:

1.28g/t over 16.6m (BBD1402) 1.09g/t over 11.30m (BBD1401)

Incl. 3.01g/t over 3.0m 2.07g/t over 7.0m (BBC7341)

  • 3 -

Figure 1 – Bomboré Plan Map Highlighting Selected Intercepts

  • 4 -

Figure 2 – North Zone Long Section

  • 5 -

Figure 3 – North Zone Cross Section

  • 6 -

Figure 4 – Siga South Cross Section

  • 7 -

Figure 5 – P16 Long Section

  • 8 -

Table 1 – Drill Results Table

HoleZoneEastingNorthingElv.DipAzi.EOHFromToLength*GradeType
(m)(m)(m)(deg.)(deg.)(m)(m)(m)(m)(g/t Au)
BBC7271CFU7293421352598270-50312709.0012.003.000.87OX
And28.0033.005.000.22OX
BBC7272CFU7295491352745274-503121110.005.005.000.43OX
And9.0012.003.000.52OX
And19.0025.006.000.39OX
And57.0061.004.000.79HR
And78.0084.006.000.80HR
And92.0095.003.000.52HR
And107.00 111.004.000.33HR
BBC7273NORTH7280281352940268-5031213215.0020.005.001.40OX
And54.0057.003.000.51OX
And68.0077.009.000.28OX
And87.0091.004.000.30HR
And117.00 120.003.000.97HR
BBC7274CFU7295451352666272-5031010243.0048.005.000.20HR
And90.0093.003.000.46HR
SIGA S7282331344889267-50253809.0013.004.000.35OX

BBC7275 22.00 26.00 4.00 0.24 OX And

BBC7276SIGA S7282501345004269-492547217.0022.005.000.99OX
And43.0047.004.000.26HR
BBC7277SIGA S7282181345098270-50254603.006.003.000.32OX
BBC7278SIGA S7282651345113271-492547011.0014.003.000.35OX
And21.0025.004.000.27OX
BBC7279SIGA S7283131344811266-4925280NSR
BBC7280SIGA S7288871345126264-4925512065.0073.008.000.31HR
BBC7281NORTH7298171354838279-503125026.0031.005.000.26OX
BBC7282NORTH7297981354793280-5031280NSRNSR
BBC7283NORTH7299011354901277-5031413039.0044.005.001.24OX
BBC7284NORTH7301081354780277-5031212589.0094.005.000.36HR
And106.00 110.004.000.29HR
BBC7285NORTH7300421354776277-5031160NSR
BBC7286NORTH7300621354756277-4831510018.0026.008.000.35OX
And36.0039.003.000.35OX
BBC7287NORTH7303941354323278-5031310015.0019.004.000.41OX
And26.0029.003.000.83OX
BBC7288NORTH7304311354346276-5031210018.0039.0021.000.47OX
Incl.34.0036.002.001.18OX
Incl.31.0038.007.000.64OX
And62.0066.004.000.45HR
NORTH7301731354118282-48315120NSR

BBC7289

BBC7290NORTH7302041354261280-4931560NSR
BBC7291NORTH7303061354233281-48314120NSR
BBC7292NORTH7298091354814279-5131875NSR
BBC7293NORTH7302651354570277-50312803.0010.007.000.34OX
BBC7294NORTH7303561354257280-5031712011.0014.003.003.12OX
Incl.12.0013.001.008.15OX
NORTH7303561354290280-503138048.0059.0011.001.64HR

BBC7295 50.00 55.00 5.00 3.27 HR Incl.

And63.0070.007.000.90HR
BBC7296NORTH7303611354319280-513178038.0043.005.000.19OX
And60.0070.0010.000.85HR
BBC7297NORTH7303561354358279-51315650.007.007.000.25OX
BBC7298NORTH7302361354533277-5031480NSR
BBC7299NORTH7302991354577279-5231410033.0042.009.000.86OX
BBC7333NORTH7297311354447287-5031210049.0055.006.000.40HR
And80.0085.005.000.43HR
HoleZoneEastingNorthingElv.DipAzi.EOHFromToLength*GradeType
(m)(m)(m)(deg.)(deg.)(m)(m)(m)(m)(g/t Au)

NORTH 730609 1354260 276 -51 313 130 64.00 67.00 3.00 0.84 HR BBC7335

BBC7339P8P97277901352625267-493139928.0035.007.000.99OX
And80.0086.006.001.23HR
Incl.80.0081.001.004.91HR
BBC7340P8P97278341352585267-5031214096.00100.004.000.42HR
BBC7341P8P97279451352472267-503158017.0045.0028.000.89OX
Incl.37.0044.007.002.07OX
BBC7342P8P97280251352559266-503128036.0043.007.000.33HR
BBC7343P8P97278311352658267-503125413.0016.003.000.59OX
BBC7344P8P97278781352722267-5031212045.0050.005.000.31OX
BBC7345P8P97279471352757267-50312150118.00 123.005.000.56HR
BBC7346P8P97279021352799267-493138039.0042.003.000.40OX
BBC7347NORTH7282951352591266-4831210048.0053.005.000.42HR
BBC7348P167296731344348260-5027094NSR
BBC7349P167297501344350260-5027095NSR
BBC7350P17 S7301811343198260-5027072NSR
BBC7351P167292551343900261-5027010410.0014.004.000.70OX
BBC7352P167293831343948262-50270100NSR
BBC7353P167293961343899262-50270673.0023.0020.001.06OX
Incl.9.0010.001.0012.50OX
And39.0044.005.000.57OX
And50.0054.004.000.46HR
BBD1374SIGA E7286911347159274-48252252111.00 114.003.001.46HR
And197.00 201.004.001.07HR
And205.00 210.005.000.84HR
BBD1375P8P97285401351955269-503103092.0017.0015.000.67OX
Incl.8.0010.002.001.75OX
And22.0028.506.500.71OX
And151.10 179.0027.900.83HR
Incl.170.00 178.008.001.30HR
BBD1376P8P97274281350533302-5131225246.0049.003.002.55HR
BBD1377SIGA E7284081346499266-50250375153.25 156.403.150.55HR
And193.30 206.1512.850.69HR
And243.00 248.005.000.64HR
And256.00 260.104.100.31HR
And279.00 288.009.000.69HR
And293.00 298.005.000.43HR
BBD1378SIGA S7287911344665261-58248255149.40 153.103.700.39HR
BBD1379SIGA S7286321345724270-5024935498.10101.453.350.79HR
And195.00 202.007.000.46HR
And253.00 256.003.000.70HR
And293.60 299.005.400.75HR
And305.20 322.0016.800.75HR
Incl.306.00 315.009.000.99HR
BBD1380P8P97285361352025268-50311252132.10 135.903.801.40HR
BBD1382P8P97285421351824270-52312372267.00 272.005.000.88HR
And278.00 286.008.000.47HR
And316.01 322.005.900.64HR
332.00 339.007.000.65HR

And

BBD1383 SIGA S 728667 1345686268 -51 252 372 136.15 143.006.850.58HR
And265.00 270.005.000.64HR
And274.00 280.006.000.98HR
And293.00 298.005.000.75HR
And317.00 320.003.000.63HR
324.00 333.009.001.52HR

And 235.00 241.00 6.00 2.01 HR Incl.

339.00 351.10 12.10 1.01 HR And

Incl.345.00 350.105.101.76HR
BBD1384 SIGA S 728632 1345140267 -46 250 228 12.00 16.004.000.53OX
182.00 191.809.800.87HR

And BBD1385 SIGA S 728715 1345068 270 -49 253 285 9.30 13.10 3.80 1.21 OX

  • 10 -
HoleZoneEastingNorthingElv.DipAzi.EOHFromToLength*GradeType
(m)(m)(m)(deg.)(deg.)(m)(m)(m)(m)(g/t Au)

17.00 25.00 8.00 0.61 OX And 83.00 86.00 3.00 0.52 HR

And136.00 141.155.150.59HR
And154.00 163.009.001.66HR
Incl.154.00 158.004.002.75HR
And208.00 214.306.300.53HR
And217.55 223.005.451.45HR
Incl.222.15 223.000.856.66HR
And229.85 235.005.150.70HR
BBD1386 SIGA S 728805 1344776262 -50 250 267 19.80 24.004.200.78OX
And208.00 213.005.000.60HR
SIGA S 728727 1344965264 -50 251 241 6.00 12.506.500.44OX

BBD1387 121.00 134.00 13.00 0.76 HR And 171.30 176.00 4.70 0.64 HR And 194.00 198.00 4.00 0.39 HR And

BBD1388 SIGA E 728172 1346993274 -50 253 267 116.00 126.0010.000.55HR
And141.00 147.006.000.75HR
And160.00 169.009.000.42HR
197.00 203.106.100.47HR

And

BBD1390 SIGA E 727891 1347537275 -50 252 192 124.00 129.005.000.46HR
And141.00 144.003.000.38HR
BBD1391 SIGA S 728928 1344823262 -51 248 382 336.00 339.003.000.65HR
BBD1392 NORTH 728965 1353592278 -54 311 273 190.00 198.008.001.37HR
Incl.193.00 195.002.002.83HR
And205.00 218.0013.001.81HR
Incl.205.00 210.005.002.57HR
BBD1393 NORTH 728897 1353620279 -50 313 252 2.10 6.704.600.73OX
And29.00 41.0012.000.69OX
And149.00 183.0034.002.97HR
Incl.152.00 159.007.004.50HR
And162.00 173.0011.004.28HR
And219.50 225.205.702.08HR
Incl.219.50 222.002.503.15HR
BBD1394 NORTH 729446 1354272286 -55 311 327 43.00 50.007.000.71HR
And229.00 260.1531.151.06HR
Incl.233.00 237.004.002.62HR
And270.00 285.0015.001.64HR
Incl.277.00 281.004.002.31HR
BBD1395 NORTH 729442 1354206285 -57 311 399 81.00 87.006.000.78HR
And91.00 97.006.000.53HR
And131.00 137.006.000.50HR
And304.00 353.0049.000.87HR
Incl.304.00 316.4012.401.05HR
And359.00 364.905.900.83HR
BBD1396 NORTH 729094 1354083285 -54 312 297 117.00 141.0024.000.64HR
Incl.140.00 141.001.003.39HR
And198.00 201.003.000.46HR
BBD1397 NORTH 729051 1353955284 -56 308 366 30.00 34.004.000.71HR
And73.00 76.503.500.61HR
And169.00 174.005.000.78HR
And198.00 204.006.000.71HR
And246.60 250.003.401.02HR
And305.00 308.003.000.64HR
And322.00 330.008.000.46HR
And343.10 348.004.900.51HR
BBD1398 NORTH 728895 1353785280 -50 312 189NSR
BBD1399 NORTH 728937 1353819281 -50 309 396 91.00 95.004.000.30HR
And295.00 298.003.000.46HR
And345.00 353.008.000.75HR
BBD1400 NORTH 729158 1354026285 -56 313 405 5.00 10.005.000.47OX
And251.00 262.0011.000.73HR
And312.00 318.006.001.52HR
  • 11 -
HoleZoneEastingNorthingElv.DipAzi.EOHFromToLength*GradeType
(m)(m)(m)(deg.)(deg.)(m)(m)(m)(m)(g/t Au)

312.00 315.00 3.00 1.90 HR Incl.

325.00 333.00 8.00 1.47 HR

Incl.330.00 333.003.003.34HR
BBD1401 P8P9 727744 1350791287 -50 313 324 8.0014.806.800.69OX
And70.0079.009.000.88HR
90.00105.0015.000.89HR

And 96.00 102.00 6.00 1.10 HR Incl.

142.00 165.00 23.00 0.49 HR And

And174.00 178.204.200.51HR
And187.00 193.006.000.53HR
And206.00 218.0012.000.57HR
And249.00 282.0033.000.66HR
Incl.252.70 264.0011.301.09HR
And285.80 291.005.200.60HR
P8P9 727672 1350717292 -50 312 321 16.00 21.105.100.37HR

BBD1402

And80.0083.003.000.68HR
And102.20 105.203.000.89HR
And119.90 126.006.100.63HR
And215.00 219.004.000.66HR
And227.40 244.0016.601.28HR
Incl.233.00 236.003.003.01HR
BBD1403 P8P9 727669 1350789291 -50 312 240 4.0030.0026.000.37OX
And92.8097.004.200.69HR
And123.00 132.009.000.76HR
P16 N 729666 1344998261 -52 270 186 103.00 104.001.001.24HR

BBD1404

BBD1405 P16 N 729581 1344897261 -50 269 228 88.00100.0012.002.68HR
Incl.99.00100.001.0027.31HR
And107.00 111.004.000.48HR
And125.00 130.005.001.72HR
Incl.125.00 128.003.002.69HR
147.00 151.004.000.41HR

And 185.00 191.00 6.00 0.43 HR And 207.00 213.00 6.00 2.83 HR And

Incl.207.00 211.004.003.92HR
BBD1406P17 S7302071343149260-502708159.5067.508.000.59HR
And71.0072.001.007.55HR
BBD1407P17 S7302091343099260-492708754.0056.002.001.36HR
BBD1408P17 S7302121343201260-5027110510.0015.005.002.04HR
Incl.14.2015.000.805.20HR
And37.0044.007.000.51HR
And48.0067.0019.001.39HR
Incl.64.0067.003.004.97HR
BBD1409P17 S7301181342899259-542718155.0066.3011.304.00HR
Incl.60.4061.200.803.98HR
BBD1410P17 S7302311343149261-5027011487.0088.001.004.18HR
BBD1411P17 S7302501343200261-4927015319.0027.308.303.81HR
Incl.24.0027.303.309.14HR
And114.00 122.008.000.77HR
And130.00 143.0013.001.19HR
Incl.137.00 141.004.002.67HR
BBD1412P17 S7300451343156260-49269120NSR
BBD1413SIGA S7287741344504259-49250168NSR
BBD1414P16 N7295451344850261-5126920775.5080.104.604.88HR
Incl.76.5077.501.0012.69HR
150.00 155.005.000.49HR

And

BBD1415SIGA S7293751345629261-5025114111.0027.0016.000.45OX
And99.00104.005.001.17HR
BBD1416P8P97275751350670297-4931125576.8083.006.200.70HR
BBD1417P16 N7295141344903261-5027019886.0091.005.000.73HR
And154.00 157.903.900.52HR
And180.70 184.153.450.72HR
  • 12 -