Announcement PDF ASX Announcement ASX: CYM | 20 JANUARY 2026 T +61 8 6374 1550 E communications@cypriummetals.com W cypriummetals.com Level1, 437 Roberts Road Subiaco WA 6008 AUSTRALIA Cyprium Metals Limited ABN: 48 002 678 640 ASX: CYM SIGNIFICANT OPPORTUNITIES IDENTIFIED ACROSS THE PATERSON EXPLORATION PROJECT Cyprium Metals Limited (ASX: CYM / OTCQB: CYPMF) (Cyprium or the Company), a copper developer focused on the phased restart of the Nifty Copper Complex in the Paterson region of Western Australia (Nifty), is pleased to provide an update on the Paterson Exploration Project following completion of its first pass review of exploration data received from IGO. Control of the Paterson Exploration Project recently returned to Cyprium following the dissolution of its Joint Venture and Farm-In Agreement with IGO, pursuant to which IGO had undertaken $24 million of exploration activities. HIGHLIGHTS • First pass review of exploration data received from IGO now complete. IGO’s exploration activities identified numerous targets including: - NL04b, NL05a and NL01a, all north of Nifty in Lamil Group rocks, which host the Winu and Telfer deposits - NB02a (Rainbow South) and MB01 (east of Maroochydore) in the Broadhurst Formation, which hosts the Nifty and Maroochydore deposits • Significant potential to extend known copper mineralisation at the Rainbow Prospect (Rainbow and Rainbow South) identified. A drill program to confirm and extend mineralisation is being designed. Historic intercepts include: - 54m at 0.28% Cu from surface in 1996 diamond hole BMD0010 at Rainbow - 10m at 0.86% Cu, 9g/t Ag from 64m in 2018 RC hole NRC007 at Rainbow - 4m at 1.84% Cu, 38g/t Ag from 95m in 2018 RC hole NRC011 at Rainbow - 4m at 1.61% Cu, 40g/t Ag from 86m in 2018 RC hole NRC006 at Rainbow - 4m at 1.84% Cu, 9g/t Ag from 41m in 2018 RC hole NRC022 at Rainbow South - 4m at 1.36% Cu, 31g/t Ag from 64m in 2018 RC hole NRC023 at Rainbow South • Potential silver by-product credit upside at Rainbow, with historic assays ranging up to 93g/t over a metre: 2005 RC hole TRC0007 returned 1 metre at 2.9% Cu, 93g/t Ag from 61m - 7 of the 2018 RC sample pulps were recently submitted for assay by Cyprium, all confirming the presence of silver • Copper intercepts at Stirling, NL04b and MB01 targets to be evaluated in more detail and follow-up programs planned - At Stirling, 2011 RC hole 11SRC001 returned 1m at 3.85% Cu from 88m, following up an intercept of 2m at 1.04% Cu from 72m in 1988 RC hole THRC0512 - At NL04b, diamond hole 24PTDA004 drilled by IGO in late 2024 returned 0.7m at 3.1% Cu from 172.3m; an offhole EM conductor has not yet been tested 2 ASX: CYM | - At MB01, IGO drilled diamond hole 24PTDA005 in late 2024 and intersected 150m of quartz-carbonate-sulphide veining, with chalcocite and native copper nearer surface and a best intercept of 2m at 1.7% Cu from 162m • A strong late time airborne EM anomaly at target NL05a is more than five kilometres from the nearest historic drillhole. Holes designed to test the anomaly designed by IGO have been pegged. Drilling is scheduled for the dry season Cyprium Executive Chairman Matt Fifield, said: “Cyprium recently regained control of ~2,000km2 of exploration ground that previously was subject to a Joint Venture and Farm-In Agreement with IGO. Our exploration ground lies adjacent to the Nifty Copper Complex and Maroochydore Copper-Cobalt Project along the western margin of the Yeneena Basin in the Paterson province, an area that is highly prospective for base metals and possibly more. These re-acquired tenements are accompanied by significant exploration data from legacy exploration programs, including $24 million of exploration expenditure undertaken by IGO. The compiled exploration data package of which we have now completed our first pass review, comprises over 900,000 meters of drilling, tens of thousands of geochemical sampling points, and regional and local electromagnetic and gravity surveys, providing Cyprium with millions of data points. The Paterson Exploration Project provides significant potential to leverage exploration data into meaningful developments for Cyprium, as we continue to build Australia’s next great copper company.” FIGURE 1 – Cyprium Paterson tenement holding and deposits, prospects and targets 3 ASX: CYM | HISTORY OF EXPLORATION ON WESTERN MARGIN OF YENEENA BASIN CYM’s exploration portfolio is comprised of ~2,000km2 of prospective ground in the Paterson province and ~100km2 of tenements in the Murchison province surrounding the Hollandaire resource and Heeler Prospect. Cyprium’s Paterson tenements and targets are shown in Figure 1. The CYM drill record in the Paterson represents over 9,100 drill holes containing over 900,000 metres of drilling information and the database also includes 30,000 soil samples as well as detailed regional geophysics data sets including airborne magnetics, airborne and ground EM and ground gravity as shown in Figures 2 - 5 (below). Cyprium First-Pass Review Cyprium’s high-level first-pass review of historic and new data indicates that the Company controls a number of significant highly prospective areas with advanced data sets and strong evidence of copper and other mineralization that are worthy of further investigation, including drill planning activities for high priority targets already identified at the Rainbow and Rainbow South prospects. The primary focus of the Company’s ongoing review is to identify advanced exploration targets that if developed could potentially utilize the processing infrastructure at the Nifty Copper Complex. Much of the regional datasets were collected in the 1980s and 1990s, at a time when materially higher-grade deposits were being pursued. In particular, Cyprium is looking to identify areas of historical exploration that encountered grades that may not have been considered significant at the time, but that may be indicative of potentially economic deposits today. Selected historic drill intercepts are listed in Table 1. 2020-2025: Paterson Exploration Project – Farm in and Joint Venture Agreement with IGO From 2020 to 2025, all of Cyprium’s exploration tenements outside of Nifty and Maroochydore were managed by IGO via the Paterson Exploration Farm-in Joint Venture, including the Rainbow and Rainbow South areas. The Farm-in and Joint Venture Agreement, signed in June 2020, required IGO to spend $34 million to earn a 70% interest in the tenements and included a free carry for CYM up to a PFS on a new mineral discovery. Over the first five years of the farm-in period, IGO spent $24 million to generate and acquire regional and local exploration data before exiting the joint venture in May 2025. IGO’s exploration activities included 281 drill holes (comprising 254 aircore and 27 diamond core), acquisition of regional data sets and data reinterpretation. IGO identified targets including NL04b, NL05a and NL01a north of Nifty in Lamil Group rocks, which host the Winu and Telfer deposits. Targets identified by IGO in the Broadhurst Formation, which hosts Nifty and Maroochydore, included NB02a (Rainbow South) and MB01 (east of Maroochydore). Following IGO’s termination of the Farm-In Agreement in April 2025, Cyprium now controls these tenements in full. IGO transferred all relevant mining information to the Company over the last two quarters, which has added substantial information to the Company’s review of its portfolio. 2016-2019: Metals X Exploration Initiatives Following the acquisition of the Paterson Copper assets in 2016, Metals X Limited (MLX) undertook a significant review of the exploration portfolio. • Nifty Downdip Extension: Step out drilling that was aimed at immediate mine life extension, MLX also began to follow the along-strike extension of the Nifty orebody completing seismic surveys and additional step out drilling that intersected significant copper mineralisation as far as 1km down plunge from the underground mine area. 4 ASX: CYM | • Rainbow: MLX also prioritised exploration in the Rainbow and Rainbow South areas, following up on earlier exploration results that intersected 54 metres at 0.28% Cu (Hole BMD0010) from surface and 38 metres at 0.24% Cu from 6 metres downhole (Hole TRD0011). • Evaluation of other regional targets: Metals X collected geophysical data and drill tested a number of other regional targets including Maroochydore. Following the 2018 exploration season, MLX commenced a divestment of the Paterson Copper assets and no further exploration was conducted. 1981-1998: Regional targeting leads to discovery and development of Nifty Regional exploration was performed over decades by WMC, Esso, BHP and MIM with the majority of the work being done in two periods, being the period between 1981-1991 which led to the discovery and development of Nifty’s copper oxide cap by WMC, the discovery of the Maroochydore deposit by Esso and the discovery of numerous other prospects, and 1993-1998 which saw regional exploration around Nifty for additional copper deposits. Beyond those two periods, regional exploration was less systematic, with most exploration expenditures focused on reserve development around the underground mine at Nifty (now abandoned) and the balance being periodic campaigns around certain targets that met expenditure requirements. FIGURE 2 – Drill collar locations FIGURE 3 – Ground EM FIGURE 4 – Soil sampling FIGURE 5 – Detailed airborne magnetics 5 ASX: CYM | RAINBOW SUMMARY The Rainbow Prospect is 30km north-northwest from Nifty and in line with regional structures along the basin margin. The mineralization mechanics, host rocks, and structural controls show many similarities to the Nifty orebody and current regional ore genesis models. The Rainbow and Rainbow South Prospect (together “Rainbow”) target sediment-hosted copper mineralisation in rocks of the Yeneena Supergroup around the contact of the Coolbro Sandstone with the overlying Broadhurst Formation (which hosts the Nifty and Maroochydore deposits). The prospect was originally discovered by WMC Resources in the early 1980s from its substantial surface lag geochemical copper, lead and zinc anomaly. Imaged surface lag copper values are shown below. Erratic historic drill testing of the prospect intersected several subcropping stratabound copper mineralised horizons. The historic drill record contains 98 drillholes for approximately 8,000 metres in the Rainbow area and 578 drill holes for 51,000 metres in the Rainbow region overall, with the most recent drilling completed by MLX in 2018. FIGURE 6 – Copper in Surface Samples and Early Interpretations of Rainbow by MLX The drill record, geophysical data and outcrop mapping suggests an anticlinal structure at Rainbow with the top of the anticline having been eroded away. A conceptual cross section from MLX is shown below. 6 ASX: CYM | FIGURE 7 – Conceptual Regional Cross Section from MLX 2018 Historic drilling has returned malachite-rich oxide copper mineralization in the lower Broadhurst Formation and upper Coolbro Sandstone, with chalcopyrite and bornite in stacked lenses of copper-silver mineralization below the base of oxidation. Figures 8 - 10 below comprise a plan view of Rainbow showing the Cu lag anomaly with historic drillhole locations and drill sections with MLX interpretation and intercepts. FIGURE 8 – Rainbow Lag Copper Anomaly and Historic Drillholes 7 ASX: CYM | FIGURE 9 – Interpreted Rainbow Drill Section A-A’ FIGURE 10 – Interpreted Rainbow Drill Section B-B’ Silver at Rainbow A review of the historic drill results shows that the 2018 holes contained assays that had silver intercepts. Sixty-seven MLX 2018 RC pulps were collected by Cyprium and submitted to Bureau Veritas for gold analysis. The selected samples returned gold values below or just above the detection limit of 0.01ppm. 8 ASX: CYM | Seven of the pulps were also assayed for copper and silver to check 2018 results. Bureau Veritas copper values are all within 5% of ALS copper values. Results for Ag are more variable, with a +17% to -26% spread. This is caused by a combination of the relatively low concentration of silver in the samples and the small split taken for the analytical technique. Cyprium is working with the lab to optimize analytical methods for future work. Full results are listed in Appendix 1. OTHER TARGETS First pass review has identified a number of targets that need more detailed evaluation. These include: • Stirling, discovered by WMC in 1988 as part of their regional exploration program. RC hole THRC0512 returned 2 metres at 1.04% Cu from 72m in Broadhurst Formation. Aditya Birla drilled 3 RC holes around THRC0512 in 2011, with 11SRC001 intersecting 1 metre at 3.85% Cu from 88m. There has been no drilling in the area since 2011. Further work is needed to understand controls on mineralisation and determine if historic holes in the area were drilled deep enough, with depths ranging from 54 to 132 metres. • NL04b, a target defined by IGO, is a zone of structurally-controlled demagnetisation in Lamil Group rocks with potential for intrusion related copper mineralisation. Four diamond holes with aircore precollars drilled in late 2024 intersected magnetite skarn and widespread potassic alteration indicative of intrusive input. Hole 24PTDA004 intersected two chalcopyrite veins and returned a best intercept of 0.7 metres at 3.1% Cu from 172.3m. A strong, late time anomaly was identified in a subsequent downhole EM survey and modelled by IGO as an offhole conductor. The anomaly has not been drill tested. • MB01, in late 2024 IGO drilled beneath a weak copper (< 0.1%) aircore anomaly located less than 10 kilometres east of the Maroochydore deposit. Hole 24PTDA005 intersected more than 150m of sulphide-bearing veins to end of hole. Intervals of supergene chalcocite and native copper occur nearer surface and the hole returned a best intercept of 2 metres at 1.7% Cu from 162m. Further drilling is required to follow up this encouraging intercept. FORWARD WORK PLAN Cyprium plans to undertake the following work programs with respect to the Paterson Exploration Project: • Rainbow Prospect - Detailed evaluation of historical exploration data - Planning and execution of a geophysical survey - Planning and execution of drilling programs • Other Exploration Prospects - Detailed evaluation of other targets, including Stirling, NL04b and MB01 - Fieldwork to commence 1H 2026 - Planning of further work programs 9 ASX: CYM | This ASX announcement was authorised by the Cyprium Board For Enquiries: Angus Miles | VP – Corporate Development and Investor Relations +61 8 6374 1550 Chris Lim | External Media Relations Advisor +61 493 392 001 communications@cypriummetals.com Follow Cyprium Metals: Subscribe to Email alerts https://cypriummetals.com/contact-us/subscribe-to-email-alerts/ LinkedIn https://www.linkedin.com/company/cyprium-metals/ X https://x.com/CypriumMetals Competent Person Statement The information in this announcement that relates to exploration results is based on and fairly represents information compiled by Australian Institute of Geoscientists member Mark Styles. Mr Styles is Exploration Manager of Cyprium Metals Limited and holds shares in the Company. Mr Styles has sufficient experience relevant to the style of mineralisation and types of deposits under consideration and to the activities being undertakes to qualify as a Competent Person as defined in the 2012 edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Styles consents to the inclusion in this announcement of the matters based on his work in the form and context in which it appears. 10 ASX: CYM | TABLE 1 – Selected Historic Drill Intercepts Hole_ID Tenement Prospect Hole Type Year Drilled MGA East MGA North Depth (m) From (m) To (m) Interval (m) Cu % Ag g/t Pb % 96 98 2 1.35 14.0 includes 96 97 1 2.19 19.3 117 119 2 1.13 23.7 includes 117 118 1 1.45 33.8 NRC003 M45/1111 Rainbow RC 2018 334747 7629186 120 69 70 1 1.60 38.3 NRC004 M45/1111 Rainbow RC 2018 334678 7629087 126 89 90 1 1.11 22.9 54 56 2 2.04 12.3 includes 54 55 1 3.40 19.8 68 69 1 2.05 65.7 85 90 5 1.34 32.2 includes 86 89 3 2.01 51.0 50 51 1 2.05 12.6 64 74 10 0.86 9.2 includes 66 67 1 1.26 8.2 and 71 73 2 1.64 27.2 80 81 1 1.16 26.0 89 90 1 1.63 9.2 95 97 2 2.07 46.1 includes 95 96 1 3.14 87.0 64 65 1 1.22 23.5 78 83 5 1.24 25.9 includes 78 81 3 1.87 38.0 87 88 1 1.04 31.5 79 81 2 1.59 34.2 includes 80 81 1 2.76 58.5 NRC010 M45/1111 Rainbow RC 2018 335003 7629295 126 89 90 1 2.52 8.0 72 73 1 3.15 58.3 95 99 4 1.84 38.6 includes 97 99 2 3.03 63.8 134 135 1 2.68 35.2 27 28 1 1.50 3.8 32 33 1 1.26 21.0 62 65 3 2.09 42.8 includes 63 65 2 3.05 63.1 75 78 3 1.83 37.4 includes 75 77 2 2.58 53.1 27 28 1 2.23 5.6 76 77 1 1.95 56.6 50 51 1 1.59 23.8 75 76 1 3.16 67.8 86 87 1 1.19 24.4 95 96 1 2.93 82.6 33 34 1 1.58 21.0 1.24 76 77 1 1.29 30.4 25 27 2 1.84 33.0 includes 25 26 1 2.82 53.7 44 45 1 1.13 12.1 102 103 1 3.03 23.2 PATERSON EXPLORATION PROJECT SELECTED HISTORIC DRILL INTERCEPTS - RAINBOW NRC016 Rainbow 2018 335389 7628613 150 RC NRC013 Rainbow 2018 335272 7628870 114 NRC014 Rainbow RC 2018 335311 7628965 NRC012 Rainbow 2018 335240 7628784 132 RC NRC011 Rainbow 2018 335207 7628690 144 RC NRC006 Rainbow 2018 334860 7628927 160 RC NRC009 Rainbow 2018 334973 7629207 126 RC NRC008 Rainbow 2018 334935 7629113 102 RC NRC015 Rainbow RC 2018 335345 7629059 108 NRC002 Rainbow 2018 334784 7629274 120 RC NRC007 Rainbow 2018 334900 7629017 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 126 126 RC RC 11 ASX: CYM | TABLE 1 – Selected Historic Drill Intercepts (cont.) Hole_ID Tenement Prospect Hole Type Year Drilled MGA East MGA North Depth (m) From (m) To (m) Interval (m) Cu % Ag g/t 22 24 2 1.34 3.5 32 33 1 2.48 64.7 44 45 1 1.25 24.5 53 54 1 2.62 65.2 55 56 1 1.06 16.3 67 69 2 1.42 24.9 67 68 1 2.33 40.4 91 93 2 1.67 30.8 includes 92 93 1 3.02 55.6 99 101 2 1.12 31.0 includes 100 101 1 2.05 58.8 109 110 1 1.32 27.7 35 36 1 1.10 0.9 45 46 1 1.18 2.6 13RNB001 M45/1111 Rainbow RC 2013 336148 7629369 300 158 160 2 1.49 30.0 13RNB003 M45/1111 Rainbow RC 2013 336698 7629046 221 148 150 2 1.74 31.0 TRC0005 M45/1111 Rainbow RC 2005 335022 7628867 99 93 94 1 1.17 21.8 61 64 3 1.21 38.4 includes 61 62 1 2.90 93.0 0 54 54 0.28 108 108.5 0.5 1.76 206.7 210.4 3.7 1.28 5.7 206.7 207.5 0.8 4.10 19.0 TRD0006 M45/1111 Rainbow DD 1985 337327 7629526 297.9 261.25 262.35 1.1 1.07 2.5 TRD0008 M45/1112 Rainbow DD 1986 336327 7630946 310 292.32 292.45 0.13 1.90 5.5 TRD0009 M45/1111 Rainbow DD 1986 337677 7630346 475 443.8 443.9 0.1 1.23 3.0 6 43.85 37.85 0.24 <0.05 43.3 43.85 0.55 1.82 <0.05 24PTDD013 M45/1109 Rainbow South DD 2024 337767 7624991 589 443 445 2 1.51 28.2 41 45 4 1.84 9.4 includes 42 43 1 5.86 33.8 61 62 1 1.44 63.4 64 68 4 1.36 31.0 includes 64 65 1 3.26 76.3 and 66 67 1 1.71 39.6 75 77 2 1.24 6.3 includes 75 76 1 2.12 9.3 89 90 1 1.12 7.6 94 98 4 1.58 16.0 includes 96 97 1 3.01 19.1 105 106 1 1.56 8.4 NRC026 M45/1109 Rainbow South RC 2018 336628 7624331 108 73 75 2 1.23 8.7 NRC027 M45/1109 Rainbow South RC 2018 336661 7624365 132 103 104 1 2.88 8.6 26 27 1 1.22 2.8 39 40 1 1.71 1.9 08RBRC009 M45/1109 Rainbow South RC 2008 336412 7624678 156 88 89 1 1.26 5.7 08RBRC010 M45/1109 Rainbow South RC 2008 336465 7624722 156 140 141 1 1.69 3.3 PATERSON EXPLORATION PROJECT SELECTED HISTORIC DRILL INTERCEPTS - RAINBOW 7624466 90 BMD0010 Rainbow DD 2008 336358 7624633 156 RC TRC0007 Rainbow 2005 335101 7629051 71 RC RC RC NRC023 Rainbow South 2018 336513 7624494 132 NRC022 Rainbow South 2018 336466 NRC021 Rainbow 2018 335580 7628550 108 RC NRC020 Rainbow 2018 335533 7628993 132 RC RC NRC019 Rainbow 2018 335498 7628897 120 NRC018 Rainbow 2018 335460 7628809 126 RC RC NRC017 Rainbow 2018 335427 7628710 132 1996 335227 7628992 235.2 2018 336551 7624528 144 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1111 M45/1109 M45/1109 M45/1109 M45/1109 NRC024 Rainbow South RC 08RBRC008 Rainbow South 1983 336402 7629766 210.4 TRD0011 M45/1111 Rainbow DD 1986 335177 7628846 84.5 TRD0001 M45/1111 Rainbow DD Hole_ID Tenement Prospect Hole Type Year Drilled MGA East MGA North Depth (m) From (m) To (m) Interval (m) Cu % Ag g/t Pb % Zn % Au g/t Co % 11SRC001 M45/1113 Stirling RC 2011 340086 7632149 150 88 89 1 3.85 11.6 THRC0512 M45/1113 Stirling RC 1988 339937 7632151 78 72 74 2 1.04 2.0 124 129 9.6 136 141 15.4 149 150 1 2.24 0.5 297 298 1.67 111 119 8 6.1 includes 111 114 3 11.0 24PTDA005 E45/1839 MB01 ACD 2024 434379 7548768 306.7 162 164 2 1.67 5.6 170.7 171 0.3 1.12 9.4 172.3 173 0.7 3.08 14.1 22PTAC099 E45/2415 NL01a AC 2022 348752 7643220 156 138 139 1 1.12 21PTAC0162 E45/2415 NL01a AC 2021 347848 7644752 37 35 36 1 20.6 0.14 21PTAC0184 E45/2415 NL01a AC 2021 348933 7643195 120 108 112 4 0.76 PATERSON EXPLORATION PROJECT SELECTED HISTORIC DRILL INTERCEPTS - OTHER AREAS 08DKRCD011 E45/2415 Dromedary RCD 2008 348393 7657602 438.6 130 7657605 348346 2006 TRC0011 E45/2415 Dromedary RC 24PTDA004 E45/3574 NL04b ACD 2024 345271 7662034 348.8 12 ASX: CYM | APPENDIX 1 – Results for Reassayed 2018 RC Pulps 13 ASX: CYM | JORC Code, 2012 Edition – Table 1 report Section 1 Sampling Techniques and Data (Criteria in this section apply to all succeeding sections.) Criteria JORC Code explanation Commentary Sampling techniques Nature and quality of sampling (e.g. cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. For IGO diamond holes, samples were collected at nominal 10m intervals reducing to 1m intervals or less at the discretion of the logging geologist. Half core samples (quarter core for duplicate pairs) were cut and submitted for analysis. For IGO aircore holes, scoop split samples were collected from spoil piles ground dumped each metre. For MLX 2018 RC holes, analytical samples were collected as scoop splits from spoil piles ground dumped each metre. Intervals to be sampled were selected based on the results of handheld XRF readings. Sampling techniques for older drillholes are not known. Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. In the MLX 2018 RC program regular cleaning of the cyclone was carried out to limit contamination. Certified analytical standards (CRMs), field duplicates and blanks were added to the sample stream as a check on laboratory equipment calibration in the MLX RC program as well as in IGO diamond and aircore programs. Aspects of the determination of mineralisation that are Material to the Public Report. In cases where ‘industry standard’ work has been done this would be relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay’). In other cases, more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (e.g. submarine nodules) may warrant disclosure of detailed information. Reverse circulation percussion drilling was used by MLX to obtain samples. Single metre samples weighing about 2kg were collected as scoop splits from ground dumped piles. IGO used aircore drilling as an initial test of targets, with 3m or 4m composite samples collected from ground- dumped piles of the basement sequence as determined by the logging geologist. Diamond drilling was used by IGO to follow up aircore anomalies, with the logging geologist selecting intervals to be sampled. Core was cut with a diamond saw and half or quarter core samples submitted for analysis. Analytical samples collected in MLX RC programs were submitted to ALS Laboratories in Perth, prepared using industry standard methods and assayed for a multi- element suite by mixed acid digest with ICP finish. IGO samples were also submitted to ALS Laboratories in Perth, prepared using industry standard methods and assayed for a multi-element suite by mixed acid digest with ICP finish and for Au, Pt and Pd by fire assay with flame AAS finish. Drilling techniques Drill type (e.g. core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (e.g. core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc). IGO programs used 3.5 inch aircore drilling to assess targets and PQ, HQ or NQ diamond drilling to further evaluate targets. Drill core was oriented using a Reflex Act 3 tool. MLX programs utilised reverse circulation drilling. Older drillholes are a mix of RC, aircore and diamond. Drill rig specifications are unknown. 14 ASX: CYM | Criteria JORC Code explanation Commentary Drill sample recovery Method of recording and assessing core and chip sample recoveries and results assessed. Qualitative sample recovery was observed and recorded by IGO personnel at the time of drilling the aircore holes and by MLX personnel at the time of drilling the 2018 RC holes. Quantitative core recovery and RQD was recorded by IGO personnel at the time of drilling diamond holes. Measures taken to maximise sample recovery and ensure representative nature of the samples. a. MLX procedures indicate that the cyclone on the rig was cleaned regularly as part of the 2018 program – during rod changes and more thoroughly between holes – to minimise sample contamination. Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material. There is no known sample bias. Logging Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. IGO personnel geologically logged all aircore chip samples at the time of drilling. Diamond core samples were summary logged at the time of drilling and then transported to Perth for more detailed logging and sampling. For the 2018 program, drill chips were geologically logged by Metals X personnel. Geological information for older drillholes is recorded in Cyprium’s drill database, indicating they were geologically logged. Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. All logging is qualitative. The total length and percentage of the relevant intersections logged. All of the reported intersections were geologically logged. Sub- sampling techniques and sample preparation If core, whether cut or sawn and whether quarter, half or all core taken. IGO core samples were cut with a diamond saw and half or quarter core samples submitted for analysis. If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. Scoop splits were collected from ground dumped single metre samples in IGO aircore programs and the MLX 2018 RC program. It is not known if samples were collected wet as well as dry. Sampling techniques for older drilling campaigns are not known. For all sample types, the nature, quality and appropriateness of the sample preparation technique. Industry standard sample preparation was used for IGO and MLX samples: dry, crush, pulverise. Quality control procedures adopted for all sub-sampling stages to maximise representivity of samples. IGO collected field duplicate samples in the aircore program and in the diamond program (as quarter core pairs) and submitted them for analysis at a ratio of 1 in 40 samples. CRMs were submitted for analysis in aircore and diamond programs at a ratio of 1 in 40 samples. Metals X collected and submitted field duplicate samples for analysis at a ratio of 1 in 50 samples, submitted blank samples for analysis at a ratio of 1 in 100 samples and submitted CRMs for analysis at a ratio of 1 in 50 samples to monitor sampling, preparation and analysis. ALS Laboratories work to documented procedures in accordance with ISO 9001 Quality Management System. Sample crushers and pulverisers are cleaned mechanically and/or with vacuum. Quartz or blue metal washes are utilised to ensure no carry over contamination between individual jobs. Samples of 15 ASX: CYM | Criteria JORC Code explanation Commentary wash materials are retained for analysis if required. Blanks and reference materials are randomly inserted into every rack of samples. Measures taken to ensure that the sampling is representative of the in-situ material collected, including for instance results for field duplicate/second-half sampling. Results for QA/QC samples are in line with expectations. Whether sample sizes are appropriate to the grain size of the material being sampled. Sample sizes are considered appropriate for the grain size of the material being sampled. Quality of assay data and laboratory tests The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. Mixed acid digest is total for most elements, although some refractory minerals might not be fully digested. In conjunction with an ICP-OES or ICP-MS finish the method is considered appropriate to the style of mineralisation. Fire assay with flame AAS finish is an industry standard assay method for Au, Pt and Pd. For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. Not applicable. Nature of quality control procedures adopted (e.g. standards, blanks, duplicates, external laboratory checks) and whether acceptable