--- title: "Osisko Development Extends Gold Mineralization at Cariboo Gold Project Beyond 700 m Vertical Depth in Previously Untested Areas; Intercepts Include 13.19 g/t Gold Over 3.60 m at 596 m Vertical Depth and 28.90 g/t Gold Over 0.50 m at 718 m Vertical Depth | ODV Stock News" type: "News" locale: "en" url: "https://longbridge.com/en/news/292116879.md" description: "Osisko Development announced new drilling results from its Cariboo Gold Project, extending gold mineralization beyond 700 meters vertical depth. Highlights include 13.19 g/t Au over 3.60 m at 596 m depth and 28.90 g/t Au over 0.50 m at 718 m depth. The company confirmed high-grade mineralization in previously untested areas and under-drilled gaps, reinforcing potential for resource growth within the existing permitted footprint." datetime: "2026-07-08T13:15:00.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/292116879.md) - [en](https://longbridge.com/en/news/292116879.md) - [zh-HK](https://longbridge.com/zh-HK/news/292116879.md) generator: "portal-rs" --- # Osisko Development Extends Gold Mineralization at Cariboo Gold Project Beyond 700 m Vertical Depth in Previously Untested Areas; Intercepts Include 13.19 g/t Gold Over 3.60 m at 596 m Vertical Depth and 28.90 g/t Gold Over 0.50 m at 718 m Vertical Depth | ODV Stock News See more from StockTitan in Google Search and AI answers.Adds StockTitan as a preferred source ยท opens Google Add on Google **HIGHLIGHTS** - **8,971 m of new surface exploration drilling designed to test near mine potential at depth and in under-drilled gap zones between defined deposit footprints. Approximately 65% of drilling transected areas outside the Cariboo Gold deposit.** - Highlight intercepts from outside the footprint of the current mineral resource across multiple zones on strike, include: **13.19 g/t Au over 3.60 m at 596 m vertical depth, 6.40 g/t Au over 6.30 m at 326 m vertical depth** (including **40.60 g/t Au over 0.50 m, 19.10 g/t Au over 0.70 m,** and **4.56 g/t Au over 0.70 m**)**, 6.17 g/t Au over 7.10 m at 517 m vertical depth** (including **73.20 g/t Au over 0.50 m, 10.40 g/t Au over 0.50 m,** and **2.21 g/t Au over 0.50 m**) and **28.90 g/t Au over 0.50 m at 718 m vertical depth.** - **Results to date confirm the presence of high-grade mineralization at depth and reinforce the strong potential for upside within under-tested gap zones and below the current Cariboo Gold deposit footprint, which extends to an average depth of approximately 350 metres.** - **5 drill rigs continue operating at surface systematically testing targets down-dip of the current Mineral Resource to a maximum vertical depth of up to 800 metres.** MONTREAL, July 08, 2026 (GLOBE NEWSWIRE) -- **Osisko Development Corp.** (NYSE: ODV, TSXV: ODV) ("**Osisko Development**" or the "**Company**") is pleased to announce new drilling results from eleven (11) surface diamond drill holes that were completed as part of an ongoing deeps and near mine gap infill exploration program at the Company's permitted, 100%-owned Cariboo Gold Project ("**CGP**" or the "**Project**"), located in central British Columbia, Canada. **Chris Lodder, President, stated**, *"We are encouraged by the initial results of the surface exploration drill program at the Cariboo Gold Project, which intercepted mineralization in all eleven drill holes. Strong high-grade intercepts in previously untested areas and known under-tested gaps continue to demonstrate the at depth potential for resource growth beyond our current mineral inventory. These results reinforce our view that we are only beginning to define the full extent of the mineralized system at depth, while identifying compelling near-mine upside opportunities โ€” all within the Project's existing permitted footprint. We are at an early stage of this program and are excited to keep drilling."* **DRILL ASSAY HIGHLIGHTS** This news release includes assays from eleven (11) surface deeps and gap zone exploration diamond drill ("**DD**") holes totaling 8,971 metres ("**m**") with depths ranging from 114 to 1,159 m (see *Table 1 and Figure 2*) completed between December 2025 and April 2026. Approximately 65%, or 5,823 m of drilling transected areas outside the current Cariboo Gold Mineral Resources, as defined by a 15 m buffer around optimized Mineral Reserves and Mineral Resources stope shapes1. All holes were collared in HQ (63.5 millimetre diameter) and reduced to NQ (47.6 millimetre diameter) where necessary to continue advance or implement directional drilling. Available tooling for directional drilling requires advance in NQ with a BQ (36.5 millimetre diameter) output while steering is active. All assays were received by June 1, 2026. Select assay highlights from intercepts outside the current Mineral Resources footprint include: - **42.42 grams per tonne ("g/t") gold ("Au") over 1.50 m in IM-26-001 at 111 m vertical depth** (Figure 2)**, including:** - 122.50 g/t Au over 0.50 m, and - 3.17 g/t Au over 0.50 m - **6.40 g/t Au over 6.30 m in IM-26-001 at 326 m vertical depth, including:** - 40.60 g/t Au over 0.50 m, and - 19.10 g/t Au over 0.70 m, and - 4.56 g/t Au over 0.70 m - **6.17 g/t Au over 7.10 m in IM-26-003 at 517 m vertical depth, including:** - 73.20 g/t Au over 0.50 m, and - 10.40 g/t Au over 0.50 m, and - 2.21 g/t Au over 0.50 m - **13.19 g/t Au over 3.60 m in IM-26-003 at 596 m vertical depth, including:** - 73.10 g/t Au over 0.50 m, and - 15.95 g/t Au over 0.50 m, and - 2.25 g/t Au over 0.60 m, and - 1.93 g/t Au over 0.50 m - **4.87 g/t Au over 5.90 m in IM-26-003 at 524 m vertical depth, including:** - 29.00 g/t Au over 0.50 m, and - 17.15 g/t Au over 0.50 m, and - 4.56 g/t Au over 0.50 m, and - 2.81 g/t Au over 0.50 m - **6.61 g/t Au over 4.50 m in IM-26-003 at 425 m vertical depth** (Figure 3)**, including:** - 41.00 g/t Au over 0.50 m, and - 5.84 g/t Au over 0.50 m, and - 4.40 g/t Au over 0.50 m, and - 2.91 g/t Au over 0.50 m, and - 2.24 g/t Au over 0.50 m - **2.79 g/t Au over 8.25 m in IM-26-001 at 436 m vertical depth, including:** - 19.65 g/t Au over 0.50 m, and - 9.30 g/t Au over 0.50 m, and - 3.06 g/t Au over 0.50 m, and - 6.36 g/t Au over 0.50 m, and - 4.03 g/t Au over 0.50 m - **13.83 g/t Au over 1.55 m in IM-26-003 at 277 m vertical depth, including:** - 38.70 g/t Au over 0.55 m - **8.81 g/t Au over 2.25 m in CM-26-001 at 370 m vertical depth, including:** - 23.10 g/t Au over 0.50 m, and - 16.00 g/t Au over 0.50 m - **17.32 g/t Au over 1.00 m in CM-25-003 at 371 m vertical depth, including:** - 33.10 g/t Au over 0.50 m Complete assay highlights, including true width estimates and vertical depths from surface, are presented in Tables 1 and 2, split by relative position within and outside of the current footprint of the Cariboo Gold Mineral Resources1. Drill hole locations and collar orientations are listed in Table 2. Intervals not recovered by drilling were assigned zero grade. Top cuts have not been applied to high grade assays. **Figure 1:** Plan view Cariboo deep and gap zone surface drilling select intercept highlights. **Figure 2:** 42.42 g/t Au over 1.50 m in IM-26-001 at 111 m vertical depth. **Figure 3:** 6.61 g/t au over 4.50 m in IM-26-003 at 425 m vertical depth. **Figure 4:** 2.79 g/t Au over 8.25 m in IM-26-001 at 436 m vertical depth. **Figure 5:** Long section displaying Cariboo deeps and gap zone surface drilling with select intercept highlights. **DISCUSSION OF RESULTS** - Results to date confirm the presence of high-grade mineralization at depth and reinforce the strong potential for resource growth upside well beyond the 350 m average of depth of the current deposit. - The consistency of broad high-grade intercepts in drill holes testing through and under the Shaft-Mosquito Gap, as seen in IM-26-002 and IM-26-003 (Figure 5), suggests high potential for near mine upside within this previously undertested zone. - Significant number of intercepts in Table 1 (length weighted assay composites and individual samples>=1.8 g/t Au within the footprint of the current Mineral Resources) demonstrate notable continuity and possible resource upside potential. - All eleven holes released encountered assay composites >=1.8 g/t Au, with ten holes encountering assay composites >=1.8 g/t Au outside the current Mineral Resources. One hole (CM-25-001) was stopped early at 114 m due to historical workings intercepted at 108 m downhole. **ABOUT THE CARIBOO DEEP PROGRAM** This ongoing program is designed to test the potential for vein corridor extensions of the existing Cariboo Gold deposit down to vertical depths of up to 800 m. The defined limit of the existing Cariboo Gold Mineral Resources and Mineral Reserves reflects limitations imposed by local topography and the practical depth of surface drills for achieving intercept spacing required for a mineral resource estimate, which is approximately 350 m vertical on average across the 4.4 km strike of the deposit. The program is also designed to target under-tested gap areas between defined deposit zones where historic mining was observed, including, for example, the ~1.2 km gap between the Shaft and Mosquito Creek Zones. Drillholes collared within the defined resource provide additional infill intercepts at shallower depths. Directional drilling has been implemented on select drillholes for higher precision targeting to depth. Ongoing surface drilling will continue to systematically test down-dip of the current resource to a maximum along strike target spacing of 300 m. Additional holes at target spacing 50 m near surface and 100 m at depth will be drilled to test continuity around the most prospective intercepts outside the current Mineral Resources footprint. New lithologic data incorporated into updated and extended geologic models is expected to aid in further refining of at depth targets. **Table 1:** Length weighted assay composites and individual samples>=1.8 g/t for Cariboo Deep diamond drill intercepts within the footprint of the current resource. **Drillhole ID** **From (m)** **To (m)** **Length (m)** **Au g/t** **Est. True Width (m)** **Vertical Depth (m)** CM-25-001 **100.30** **104.25** **3.95** **2.73** **2.54** **78** Including 102.65 103.75 1.10 8.68 CM-25-002 65.40 65.90 0.50 1.91 0.35 51 **101.80** **104.80** **3.00** **2.74** **2.12** **80** Including 101.80 103.30 1.50 3.24 and 103.30 104.80 1.50 2.23 **177.10** **180.50** **3.40** **9.31** **2.30** **140** Including 177.10 177.60 0.50 2.57 and 177.60 178.10 0.50 38.10 and 179.50 180.00 0.50 16.25 and 180.00 180.50 0.50 3.03 187.25 187.80 0.55 9.30 0.39 147 **191.70** **196.20** **4.50** **4.41** **3.18** **153** Including 193.70 194.20 0.50 12.75 and 195.70 196.20 0.50 25.00 **208.00** **211.75** **3.75** **3.63** **2.41** **166** Including 209.00 209.50 0.50 24.90 **230.40** **231.90** **1.50** **2.26** **1.41** **184** Including 230.90 231.40 0.50 6.45 233.50 234.00 0.50 16.05 0.50 186 **235.00** **236.00** **1.00** **17.47** **0.42** **188** Including 235.00 235.50 0.50 34.50 **248.30** **251.20** **2.90** **12.09** **1.77** **200** Including 249.70 250.45 0.75 26.50 and 250.45 251.20 0.75 19.60 **264.90** **266.90** **2.00** **12.83** **1.41** **214** Including 265.40 265.90 0.50 5.61 and 265.90 266.40 0.50 45.40 CM-25-003 86.50 87.00 0.50 3.19 0.25 72 142.35 142.85 0.50 3.10 0.25 117 **178.85** **179.85** **1.00** **1.83** **0.77** **147** Including 179.35 179.85 0.50 2.00 **197.45** **200.15** **2.70** **1.88** **2.24** **163** Including 199.65 200.15 0.50 8.22 215.30 215.80 0.50 1.87 0.35 177 **248.70** **249.70** **1.00** **2.44** **0.91** **204** Including 249.20 249.70 0.50 4.39 **312.85** **313.85** **1.00** **2.26** **0.67** **255** Including 312.85 313.35 0.50 4.21 **321.40** **322.40** **1.00** **2.11** **0.71** **262** Including 321.40 321.90 0.50 3.86 and 346.00 347.00 1.00 8.40 0.71 281 **351.85** **353.50** **1.65** **10.62** **1.13** **286** Including 351.85 353.00 1.15 15.20 **355.90** **357.00** **1.10** **3.35** **0.90** **290** Including 355.90 356.50 0.60 5.94 364.25 364.75 0.50 3.06 0.38 296 **365.90** **368.15** **2.25** **64.13** **1.87** **298** Including 367.65 368.15 0.50 288.00 392.05 392.55 0.50 2.34 0.39 320 CM-26-001 **171.10** **172.85** **1.75** **7.30** **1.39** **129** Including 172.35 172.85 0.50 24.90 **198.80** **199.80** **1.00** **2.06** **0.64** **149** Including 199.30 199.80 0.50 3.43 **340.70** **343.60** **2.90** **2.93** **1.96** **254** Including 340.70 341.85 1.15 5.61 and 341.85 342.55 0.70 2.45 **344.75** **346.20** **1.45** **2.20** **0.98** **257** Including 345.25 346.20 0.95 3.20 **352.70** **353.80** **1.10** **2.20** **0.63** **263** Including 353.20 353.80 0.60 3.81 and 356.10 356.60 0.50 2.81 0.41 265 **473.75** **474.75** **1.00** **1.88** **0.76** **356** Including 474.25 474.75 0.50 2.09 CM-26-002 **35.40** **36.55** **1.15** **5.76** **0.74** **15** Including 35.90 36.55 0.65 10.00 **61.50** **64.25** **2.75** **1.85** **2.11** **24** Including 62.00 62.50 0.50 9.38 **73.00** **74.40** **1.40** **3.49** **1.03** **28** Including 73.00 73.60 0.60 2.43 and 73.60 74.40 0.80 4.29 **76.45** **84.00** **7.55** **3.26** **5.34** **31** Including 77.45 77.95 0.50 2.06 and 78.45 79.50 1.05 13.10 and 80.10 81.00 0.90 8.55 **92.85** **97.00** **4.15** **5.30** **3.99** **36** Including 93.35 94.00 0.65 13.05 and 94.00 94.50 0.50 25.80 172.00 172.50 0.50 5.77 0.43 72 201.50 202.90 1.40 2.48 1.07 90 207.85 208.35 0.50 1.82 0.38 92 213.20 213.70 0.50 1.86 0.38 94 **222.80** **226.75** **3.95** **11.11** **2.91** **99** Including 223.55 224.05 0.50 66.80 and 224.55 225.05 0.50 16.85 **232.90** **234.00** **1.10** **2.19** **0.71** **102** Including 233.40 234.00 0.60 3.85 **253.90** **257.00** **3.10** **8.29** **2.61** **114** Including 253.90 254.40 0.50 2.97 and 254.40 254.90 0.50 45.00 and 254.90 255.40 0.50 3.14 **261.25** **264.30** **3.05** **3.37** **1.96** **118** Including 261.25 261.75 0.50 15.45 and 262.85 263.55 0.70 3.12 **268.50** **269.50** **1.00** **2.42** **0.64** **123** Including 269.00 269.50 0.50 4.60 305.30 305.80 0.50 10.60 0.32 145 **319.00** **322.00** **3.00** **5.50** **2.12** **154** Including 321.50 322.00 0.50 31.80 **390.50** **392.35** **1.85** **1.93** **1.31** **197** Including 390.50 391.00 0.50 5.35 **410.00** **418.00** **8.00** **2.41** **6.13** **212** Including 411.00 411.50 0.50 10.80 and 415.00 415.50 0.50 15.80 and 416.00 416.50 0.50 9.69 442.00 443.10 1.10 2.35 0.78 231 449.15 449.85 0.70 2.22 0.45 236 **452.65** **457.00** **4.35** **2.34** **2.80** **240** Including 456.40 457.00 0.60 16.25 **458.30** **461.85** **3.55** **12.30** **2.91** **243** Including 459.50 460.90 1.40 17.50 and 460.90 461.85 0.95 19.75 485.90 486.40 0.50 8.40 0.37 260 **537.50** **542.90** **5.40** **21.35** **4.14** **300** Including 540.65 541.15 0.50 3.15 and 541.15 542.40 1.25 89.80 CM-26-003 36.00 36.50 0.50 11.20 0.38 29 153.00 153.70 0.70 3.04 0.43 115 264.00 264.50 0.50 2.07 1.00 198 **353.90** **354.90** **1.00** **2.22** **0.64** **265** Including 353.90 354.40 0.50 4.10 373.00 374.00 1.00 2.28 0.82 279 377.00 377.50 0.50 2.09 0.32 281 IM-25-001 46.25 47.00 0.75 38.30 0.65 37 **49.05** **50.05** **1.00** **8.41** **0.87** **40** Including 49.05 49.55 0.50 16.70 **93.00** **94.70** **1.70** **2.74** **1.60** **84** Including 93.65 94.20 0.55 7.53 128.65 129.15 0.50 4.31 0.41 118 180.00 181.00 1.00 2.17 1.65 169 **190.00** **192.25** **2.25** **1.89** **1.84** **180** Including 190.70 191.20 0.50 3.96 and 191.75 192.25 0.50 4.03 248.50 249.00 0.50 2.02 0.32 237 **296.60** **297.60** **1.00** **2.02** **0.57** **285** Including 297.10 297.60 0.50 3.11 **334.60** **336.40** **1.80** **2.50** **1.56** **324** Including 334.60 335.20 0.60 5.42 **340.45** **352.50** **12.05** **5.07** **7.47** **335** Including 340.95 341.85 0.90 20.20 and 341.85 342.45 0.60 2.70 and 343.00 343.55 0.55 6.62 and 343.55 344.05 0.50 14.75 and 344.70 345.50 0.80 1.81 and 345.50 346.05 0.55 2.73 and 346.05 347.45 1.40 15.15 **361.00** **365.00** **4.00** **2.56** **3.06** **351** Including 361.50 362.00 0.50 16.20 and 363.00 363.55 0.55 2.68 **371.85** **372.85** **1.00** **2.47** **0.69** **360** Including 371.85 372.35 0.50 3.55 **379.75** **383.25** **3.50** **3.13** **2.92** **369** Including 379.75 380.25 0.50 3.57 and 380.25 380.75 0.50 3.55 and 381.25 381.75 0.50 4.52 and 381.75 382.25 0.50 5.93 and 382.25 382.75 0.50 4.05 **399.05** **401.05** **2.00** **9.11** **1.65** **388** Including 399.05 399.55 0.50 32.10 and 400.55 401.05 0.50 4.00 **410.75** **412.70** **1.95** **4.39** **1.83** **399** Including 410.75 411.25 0.50 5.91 and 411.25 412.20 0.95 5.80 **516.75** **517.75** **1.00** **1.83** **0.77** **504** Including 516.75 517.25 0.50 3.19 IM-26-001 **237.00** **238.50** **1.50** **2.13** **1.36** **215** 456.55 457.10 0.55 2.64 0.44 401 IM-26-002 **90.50** **92.65** **2.15** **13.48** **1.82** **52** Including 90.50 91.00 0.50 55.60 **152.20** **153.70** **1.50** **1.85** **1.23** **93** Including 152.70 153.20 0.50 1.93 and 153.20 153.70 0.50 3.50 **221.00** **222.60** **1.60** **9.18** **1.41** **144** Including 221.00 221.50 0.50 25.80 and 221.50 222.00 0.50 3.29 **241.40** **243.70** **2.30** **5.05** **1.99** **161** Including 241.40 242.50 1.10 10.40 **290.30** **292.65** **2.35** **5.34** **1.80** **201** Including 290.30 291.50 1.20 9.48 **306.75** **309.75** **3.00** **4.14** **2.57** **214** Including 308.75 309.25 0.50 1.95 and 309.25 309.75 0.50 21.60 IM-26-004 **56.15** **59.05** **2.90** **1.81** **2.22** **53** Including 56.15 57.00 0.85 4.53 **62.40** **66.80** **4.40** **7.62** **3.81** **60** Including 62.40 63.40 1.00 1.84 and 64.15 64.65 0.50 2.41 and 64.65 65.15 0.50 58.30 **73.20** **74.70** **1.50** **11.58** **1.15** **69** Including 73.20 73.70 0.50 16.10 and 74.20 74.70 0.50 18.60 76.00 77.15 1.15 4.60 1.00 72 **223.15** **224.50** **1.35** **2.09** **1.03** **208** Including 224.00 224.50 0.50 5.45 **233.75** **234.80** **1.05** **2.75** **0.91** **215** Including 233.75 234.25 0.50 5.56 279.00 279.50 0.50 3.70 0.49 250 283.50 284.00 0.50 3.81 0.49 253 294.00 294.50 0.50 4.37 0.47 261 378.00 378.80 0.80 1.93 0.51 307 387.50 388.00 0.50 3.29 0.49 310 **Table 2:** Length weighted assay composites and individual samples>=1.8 g/t for Cariboo Deep diamond drill intercepts outside the footprint of the current resource. **Drillhole ID** **From (m)** **To (m)** **Length (m)** **Au g/t** **Est. True Width (m)** **Vertical Depth (m)** CM-25-002 424.25 424.75 0.50 3.56 0.42 354 CM-25-003 **440.50** **441.50** **1.00** **2.89** **0.77** **360** Including 441.00 441.50 0.50 5.62 **454.50** **455.50** **1.00** **17.32** **0.77** **371** Including 455.00 455.50 0.50 33.10 643.85 644.35 0.50 10.35 0.38 524 704.25 704.75 0.50 4.01 0.29 564 CM-26-001 **492.50** **494.75** **2.25** **8.81** **1.72** **370** Including 492.50 493.00 0.50 23.10 and 493.00 493.50 0.50 16.00 496.75 497.25 0.50 2.64 0.38 372 **540.00** **542.50** **2.50** **3.48** **2.11** **404** Including 540.70 541.40 0.70 3.56 and 542.00 542.50 0.50 11.95 **546.30** **548.30** **2.00** **2.25** **1.49** **409** Including 546.80 547.30 0.50 5.22 and 547.30 547.80 0.50 3.23 550.75 551.25 0.50 4.14 0.38 411 CM-26-002 642.30 642.95 0.65 2.29 0.50 378 **655.60** **658.40** **2.80** **3.58** **1.94** **388** Including 655.60 657.05 1.45 6.07 698.00 698.50 0.50 4.88 0.29 418 790.65 791.95 1.30 1.97 0.75 494 892.70 893.20 0.50 4.57 0.29 572 CM-26-003 442.35 442.85 0.50 1.92 0.43 323 445.40 445.90 0.50 2.37 0.41 324 **456.50** **457.50** **1.00** **1.89** **0.64** **325** Including 456.50 457.00 0.50 2.72 459.50 460.00 0.50 3.33 0.47 325 462.00 462.50 0.50 3.85 0.35 326 **477.05** **479.00** **1.95** **2.43** **1.67** **328** Including 477.05 478.00 0.95 2.72 Including 478.00 478.50 0.50 4.09 **543.40** **550.75** **7.35** **2.12** **5.42** **347** Including 544.90 545.40 0.50 14.80 and 548.00 548.50 0.50 2.00 and 549.90 550.75 0.85 4.49 **552.25** **557.10** **4.85** **1.80** **2.61** **350** 555.10 556.60 1.50 4.29 **565.75** **566.75** **1.00** **9.85** **0.61** **355** Including 565.75 566.25 0.50 19.60 568.15 568.65 0.50 3.24 0.29 355 659.50 660.00 0.50 2.41 0.35 400 708.60 709.10 0.50 2.85 0.47 430 801.50 802.00 0.50 2.65 0.35 490 **822.90** **823.90** **1.00** **3.94** **0.71** **506** Including 822.90 823.40 0.50 2.19 and 823.40 823.90 0.50 5.68 830.60 831.20 0.60 1.86 0.39 511 IM-25-001 **563.80** **564.80** **1.00** **2.07** **0.87** **551** Including 564.30 564.80 0.50 3.78 IM-26-001 115.40 115.90 0.50 5.01 0.35 101 **126.05** **127.55** **1.50** **42.42** **1.27** **111** Including 126.05 126.55 0.50 3.17 and 126.55 127.05 0.50 122.50 **151.00** **152.60** **1.60** **2.16** **1.39** **135** Including 151.00 151.60 0.60 5.52 **359.30** **365.60** **6.30** **6.40** **5.85** **326** Including 359.30 360.00 0.70 19.10 and 360.50 361.00 0.50 40.60 and 362.50 363.20 0.70 4.56 **424.00** **427.60** **3.60** **2.34** **3.01** **376** Including 424.00 424.50 0.50 12.30 and 425.00 425.50 0.50 2.21 456.55 457.10 0.55 2.64 0.44 401 **494.25** **502.50** **8.25** **2.79** **6.92** **436** Including 494.25 494.75 0.50 19.65 and 495.25 495.75 0.50 9.30 and 498.50 499.00 0.50 3.06 and 499.50 500.00 0.50 6.36 and 501.00 501.50 0.50 4.03 515.50 516.00 0.50 4.20 0.41 472 **536.85** **537.85** **1.00** **3.20** **0.87** **452** Including 537.35 537.85 0.50 6.24 555.75 556.25 0.50 21.90 0.35 490 628.00 629.50 1.50 2.93 1.41 559 798.50 799.00 0.50 28.90 0.29 718 IM-26-002 **505.75** **507.00** **1.25** **1.98** **0.98** **358** Including 505.75 506.30 0.55 4.21 578.00 578.50 0.50 7.72 0.38 413 619.30 619.80 0.50 2.22 0.38 442 646.90 647.55 0.65 4.77 0.50 463 IM-26-003 **26.60** **28.60** **2.00** **7.42** **1.73** **18** Including 27.10 28.10 1.00 13.75 289.10 289.60 0.50 5.78 0.41 210 308.00 309.40 1.40 3.92 0.70 225 **377.45** **379.00** **1.55** **13.83** **1.19** **277** Including 377.95 378.50 0.55 38.70 554.50 555.00 0.50 23.30 0.35 404 **579.50** **584.00** **4.50** **6.61** **3.32** **425** Including 579.50 580.00 0.50 5.84 and 581.00 581.50 0.50 41.00 and 581.50 582.00 0.50 2.24 and 582.00 582.50 0.50 2.91 and 582.50 583.00 0.50 4.40 **694.45** **695.45** **1.00** **2.88** **0.57** **501** Including 694.95 695.45 0.50 5.46 708.60 709.15 0.55 4.14 0.32 510 **717.40** **724.50** **7.10** **6.17** **5.22** **517** Including 717.90 718.40 0.50 2.21 and 722.00 722.50 0.50 73.20 and 724.00 724.50 0.50 10.40 **725.75** **726.75** **1.00** **2.79** **0.66** **520** Including 726.25 726.75 0.50 4.95 **730.35** **736.25** **5.90** **4.87** **4.40** **524** Including 731.50 732.00 0.50 2.81 and 732.00 732.50 0.50 29.00 and 734.75 735.25 0.50 4.56 and 735.75 736.25 0.50 17.15 **771.75** **773.10** **1.35** **1.98** **1.05** **548** Including 772.60 773.10 0.50 5.07 818.80 819.30 0.50 4.61 0.41 578 **842.30** **845.90** **3.60** **13.19** **1.89** **596** Including 842.30 842.80 0.50 15.95 and 843.30 843.80 0.50 73.10 and 844.30 844.90 0.60 2.25 and 844.90 845.40 0.50 1.93 **938.70** **940.20** **1.50** **5.25** **0.93** **664** Including 938.70 939.20 0.50 2.47 and 939.70 940.20 0.50 13.25 **Table 3:** Surface DD collar locations, orientations, and max drillhole depths. Negative dips point down. **Drillhole ID** **Target Area** **Easting** **(UTM Zn 10N)** **Northing** **(UTM Zn 10N)** **Elevation (m)** **Depth (m)** **Collar Dip** **Collar Azimuth** CM-25-001 Valley 595349 5883999 1201.37 114 -50 100 CM-25-002 Valley / Cow 595364 5883994 1201.40 757.4 -51 101 CM-25-003 Valley / Cow 595298 5884177 1200.79 891.5 -55 100 CM-26-001 Cow 595644 5883770 1282.97 1003 -45 100 CM-26-002 Cow / Valley 595643 5883764 1284.38 1027 -45 323 CM-26-003 Cow 595900 5883610 1359.41 1159.1 -45 105 IM-25-001 Shaft 594918 5884184 1295.53 720 -45 315 IM-26-001 Shaft 594989 5884345 1302.34 808.35 -45 310 IM-26-002 Shaft / Mosquito-Shaft Gap 594615 5884520 1396.15 868.4 -45 305 IM-26-003 Mosquito-Shaft Gap 594244 5884732 1411.35 983.3 -50 320 IM-26-004 Shaft 594914 5884187 1292.45 639 -45 305 **CORPORATE NAME CHANGE** As previously announced, Osisko Development Corp. intends to change its name to Osisko Gold Group Inc., after receiving shareholder approval for the change of name at its annual and special meeting held on June 23, 2026. Also as previously announced, the Company intends to change the trading symbol for its common shares on both the TSX Venture Exchange ("**TSXV**") and the New York Stock Exchange ("**NYSE**") from "ODV" to "OGG". The Company anticipates the legal change in name to become effective on July 20, 2026, and expects its common shares to begin trading under the new symbol "OGG" on both the TSXV and the NYSE effective at market open on July 20, 2026. The trading symbols for the Company's common share purchase warrants are also expected to change effective at market open on July 20, 2026: (i) warrants trading under "ODVWZ" on the Nasdaq Stock Market ("**Nasdaq**") and "ODV.WT.U" on the TSXV will change to "OGGWZ" and "OGG.WT.U", respectively; and (ii) warrants trading on the TSXV under "ODV.WT.A" and "ODV.WT.V" will change to "OGG.WT.A", and "OGG.WT.V", respectively. In connection with the name and symbol changes of the Company's listed securities, the CUSIPs and ISIN's of the Company's securities will change as well. For the Company's common shares, the CUSIP and ISIN will be changed to 68827X105 and CA68827X1050, respectively. In addition, the following new CUSIP and ISIN numbers have been assigned to the warrants of the Company: (i) OGG.WT.A: CUSIP 68827X139 and ISIN CA68827X1399; (ii) OGG.WT.U (TSXV) and OGGWZ (Nasdaq): CUSIP 68827X113 and ISIN CA68827X1134; and (iii) OGG.WT.V: CUSIP 68827X121 and ISIN CA68827X1217. **ABOUT CARIBOO GOLD PROJECT** The Cariboo Gold Project is a permitted, 100%-owned feasibility-stage project located in the historic Wells-Barkerville mining camp of central British Columbia, Canada. Spanning approximately 186,740 hectares, the Company's land package includes 443 mineral titles and covers an area that extends approximately 77-kilometres from northwest to southeast. In late 2024, the Project was granted the *Mines Act* and *Environmental Management Act* (British Columbia) permits, marking the successful completion of the permitting process for key approvals, solidifying the Project's shovel-ready status. The Cariboo Gold Project hosts Probable Mineral Reserves of 2.07 million ounces of contained Au (17,815 kt grading 3.62 g/t Au); Measured Mineral Resources of 8,000 ounces of contained Au (47 kt grading 5.06 g/t Au); Indicated Mineral Resources of 1.60 million ounces of contained Au (17,332 kt grading 2.88 g/t Au); and Inferred Mineral Resources of 1.86 million ounces of contained Au (18,774 kt grading 3.09 g/t Au). Mineral Resources are reported exclusive of Mineral Reserves. **Technical Reports** Scientific and technical information relating to the Cariboo Gold Project and the 2025 feasibility study on the Cariboo Gold Project is supported by the technical report, titled "*NI 43-101 Technical Report, Feasibility Study for the Cariboo Gold Project, District of Wells, British Columbia, Canada*" and dated June 11, 2025 (with an effective date of April 25, 2025) (the "**Cariboo Technical Report**"). For readers to fully understand the information in the Cariboo Technical Report, reference should be made to the full text of the Cariboo Technical Report in its entirety, including all assumptions, parameters, qualifications, limitations and methods therein. The Technical Report is intended to be read as a whole, and sections should not be read or relied upon out of context. The Technical Report was prepared in accordance with National Instrument 43-101 โ€“ *Standards of Disclosure for Mineral Projects* ("**NI 43-101**") and is available electronically on SEDAR+ (www.sedarplus.ca) and on EDGAR (www.sec.gov) under Osisko Development's issuer profile and on the Company's website at www.osiskodev.com. **Qualified Persons** The scientific and technical information contained in this news release has been reviewed, verified and approved by Scott Smith, P. Geo., Vice President, Exploration of Osisko Development, a "qualified person" within the meaning of NI 43-101. Verification includes core photo and three-dimensional review of logged drillhole data and assays consistent with the Company's standard procedures. **Quality Assurance (QA) โ€“ Quality Control (QC)** HQ and NQ diameter drill core is cut (halved) on site at the Cariboo Project subsequent to QAQC checks for logging and sampling errors. BQ core (limited to directional intervals) are whole core sampled following daily QAQC. Any BQ intercepts external to the footprint of the current resource (none herein) are to be excluding from informing any new resource shapes. Quality control (QC) samples are inserted at regular intervals in the sample stream, including blanks and reference materials with all sample shipments to monitor laboratory performance. Samples are bagged, labeled, sealed with numbered security tags All drill core samples are submitted to ALS Geochemistry's analytical facility in North Vancouver, British Columbia for preparation and analysis. The ALS facility is accredited to the ISO/IEC 17025 standard for gold assays, and all analytical methods include quality control materials at set frequencies with established data acceptance criteria. The entire sample is crushed, and 250 grams is pulverized. Analysis for gold is by 50 gram fire assay fusion with atomic absorption (AAS) finish with a lower limit of 0.01 ppm and upper limit of 100 ppm. Samples with gold assays greater than 100 ppm are re-analyzed by fire-assay with gravimetric finish (upper limit 10,000 ppm). Select samples containing visible gold and/or cosalite are flagged during logging for an additional 1,000-gram screen metallic fire assay to ensure accurate quantification of any coarse fraction. All samples are also analyzed using a 48 multi-elemental geochemical package by a 4-acid digestion, followed by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) and Inductively Coupled Plasma Mass Spectroscopy (ICP-MS). **End Notes (excluding tables)** 1. Refer to the Cariboo Technical Report for the assumptions, qualifications and limitations relating to disclosure about the Cariboo Gold Project and the 2025 feasibility study on the Cariboo Gold Project. **ABOUT** **OSISKO** **DEVELOPMENT** **CORP.** Osisko Development Corp. is a continental North American gold development company focused on past producing mining camps with district scale potential. The Company's objective is to become an intermediate gold producer through the development of its flagship, fully permitted, 100%-owned Cariboo Gold Project, located in central British Columbia, Canada. Its project pipeline is complemented by the Tintic Project located in the historic East Tintic mining district in Utah, U.S.A., a brownfield property with significant exploration potential, extensive historical mining data, and access to established infrastructure. Osisko Development is focused on developing long-life mining assets in mining-friendly jurisdictions while maintaining a disciplined approach to capital allocation, development risk management, and mineral inventory growth. For further information, visit our website at www.osiskodev.com or contact: **Sean Roosen** **Philip Rabenok** Chairman and CEO Vice President, Investor Relations Email: sroosen@osiskodev.com Email: prabenok@osiskodev.com Tel: +1 (514) 940-0685 Tel: +1 (437) 423-3644 **CAUTION REGARDING FORWARD LOOKING STATEMENTS** *This news release contains "forward-looking information" (within the meaning of applicable Canadian securities laws) and "forward-looking statements" (within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, as amended) (collectively, "forward-looking statements"). Such forward-looking statements are identified with words such as "may", "will", "would", "could", "anticipate", "believe", "expect", "plan", "intend", "potential", "estimate", "propose", "project", "outlook", "foresee", "objective", "strategy", variants of these words or the negative or comparable terminology, as well as terms usually used in the future and the conditional. Information contained in forward-looking statements is based upon certain material assumptions that were applied in drawing a conclusion or making a forecast or projection, including the assumptions, qualifications, limitations or statements pertaining to: the utility and significance of the exploration drilling designed to test near mine potential at depth and in under-drilled gap zones; the results and interpretation thereof confirming the presence of high-grade mineralization at depth; the strong potential for upside and resource growth beyond the current mineral inventory at the Cariboo Gold Project; the utility and significance of the results and interpretation in providing positive indication of understanding (if any) of the potential full extent of the mineralized system at depth and whether compelling near-mine upside opportunities exist (if at all); the significance of continued drilling at depth and in underexplored zones; the interpretation and accuracy of intercepts to suggest possible extensions of vein corridors, with potential for resource conversion and upside mineralization; the interpretation of drill results being outside the current areas of the Cariboo Gold deposit; the strong potential for resource growth upside well beyond the 350 metre average of depth of the current deposit (if at all); the consistency of broad high-grade intercepts in drill holes testing through and under the Shaft-Mosquito Gap and the potential for near mine upside within this previously untested zone (if at all); the interpretation and accuracy of intercepts demonstrating continuity and possible resource upside potential ; the utility and significance of incorporating new lithologic data into updated and extended geologic models and its expectation of aiding in further refining of at depth targets (if at all); the prospectivity of exploration in targets outside of currently defined mineral reserves and/or mineral resources; the interpretation and accuracy of spatial geometries, geological structure and local variability modeling and assumptions in regard to potential reserve or resource revisions (if at all); the results (if any) of further exploration work and ability of the Company to define and expand mineral resources beyond current mineral resource estimates; the ability and utility of exploration work (including drilling) to inform resource modeling, mine planning, production stope design procedures and parameters, refinement of infill drill requirements, and the appropriate drill spacing for future infill drilling (if at all); assumptions, qualifications and parameters underlying the Cariboo Technical Report (including, but not limited to, the mineral resources, mineral reserves, production profile, mine design and project economics); the results of the Cariboo Technical Report as an indicator of quality and robustness of the Cariboo Gold Project, as well as other considerations that are believed to be appropriate in the circumstances; the ability of the Company to achieve the estimates outlined in the Cariboo Technical Report in the timing contemplated (if at all); mineral resource category conversion; the future development and operations at the Cariboo Gold Project; management's perceptions of historical trends, current conditions and expected future developments; the utility and significance of historic data, including the significance of the district hosting past producing mines; the ability of exploration work (including drilling and sampling) to accurately predict mineralization; the ability of the Company to complete its exploration and development objectives for its projects in the timing contemplated and within expected costs (if at all); the ability to adapt to changes in gold prices, estimates of costs, estimates of planned exploration and development expenditures; the Company's strategy and objectives relating to the Cariboo Gold Project as well as its other projects; the assumptions, qualifications and limitations relating to the Cariboo Gold Project being permitted; the exploration potential and prospectivity (if any) of its properties; the Company's anticipated name change and trading of its securities under its updated stock ticker symbols (including timing thereof); regulatory framework remaining defined and understood as well as other considerations that are believed to be appropriate in the circumstances, and any other information herein that is not a historical fact may be "forward looking information". Actual results could differ materially due to a number of factors, including, without limitation: the change in the Company's trading symbols and the marketplace effective date of such changes, risks relating to third-party approvals, including the issuance of permits by governments, capital market conditions and the Company's ability to access capital on terms acceptable to the Company for the contemplated exploration and development at the Company's properties; risks related to the exploration, development and operation of the Cariboo Gold Project; risks related to geological modeling and resource estimation; health, safety and security incidents; regulatory delays or changes in regulatory framework and applicable laws; labour shortages or disputes; general economic and market conditions and business conditions in the mining industry; fluctuations in commodity and currency exchange rates; changes in regulatory framework and applicable laws, as well as those risks and factors disclosed in the Company's most recent annual information form, financial statements and management's discussion and analysis as well as other public filings on SEDAR+ (www.sedarplus.ca) and on EDGAR (www.sec.gov).* *Although the Company believes the expectations conveyed by the forward-looking statements are reasonable based on information available as of the date hereof, no assurances can be given as to future results, levels of activity and achievements. The Company disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or results or otherwise, except as required by law. Forward-looking statements are not guarantees of performance and there can be no assurance that these forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.* **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. No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein.** Photos accompanying this announcement are available at https://www.globenewswire.com/NewsRoom/AttachmentNg/4eeeff64-1f84-49a7-8179-5ac9fde4dabb https://www.globenewswire.com/NewsRoom/AttachmentNg/88fe5c1e-b6a9-4d12-ac25-ac28fb0e4a89 https://www.globenewswire.com/NewsRoom/AttachmentNg/e9b03dde-4ba8-4fac-98f5-6d752d906961 https://www.globenewswire.com/NewsRoom/AttachmentNg/c8bb4b85-0070-4da0-a48f-81e56f9a6ed2 https://www.globenewswire.com/NewsRoom/AttachmentNg/65b665c5-659e-43b4-9d66-6d362f846146 ### Related Stocks - [ODV.US](https://longbridge.com/en/quote/ODV.US.md) - [OGG.US](https://longbridge.com/en/quote/OGG.US.md) - [ODVWZ.US](https://longbridge.com/en/quote/ODVWZ.US.md) ## Related News & Research - [Vior Gold outlines Ligneris project drilling and exploration targets in corporate presentation](https://longbridge.com/en/news/297802176.md) - [Kobo Resources extends high-grade gold mineralization north at Kossou project with 1 m at 68.6 g/t Au drill hit](https://longbridge.com/en/news/297905989.md) - [Collective Mining begins drilling at Orion target at Guayabales project in Colombia](https://longbridge.com/en/news/297898748.md) - [Paterson Resources to Launch Major Drilling Campaign at Grace Gold Project](https://longbridge.com/en/news/298148412.md) - [Puma Exploration Announces Trenching at McKenzie Gold Project to Define Drill Targets | PUMXF Stock News](https://longbridge.com/en/news/297783402.md) --- > **Disclaimer: This article is for reference only and does not constitute any investment advice.**