Announcement PDF ASX ANNOUNCEMENT 23 April 2026 MARCH QUARTERLY ACTIVITIES REPORT Delta Lithium Limited (ASX: DLI) (“Delta” or “the Company”) is pleased to provide a summary of activities undertaken during the quarter ended 31 March 2026. March Quarter Highlights Mt Ida • Drilling continued to provide high-grade lithium intercepts and increased confidence, including1 ; o 34m @ 1.86% Li2O from 251m in DFS406 o 30m @ 1.88% Li2O from 206m in DFS396 o 31m @ 1.84% Li2O from 196m in DFS395 o 21m @ 2.07% Li2O from 189m in DFS392 o 27m @ 1.56% Li2O from 232m in DFS402 o 26m @ 1.31% Li2O from 221m in DFS680 o 24m @ 2.00% Li2O from 309m in DFS70 • Processing of Mt Ida mica concentrate successfully generated a 99.8% Lithium Carbonate product during testwork, confirming its suitability for battery manufacturing • Development of a process to recover rubidium was also demonstrated and produced a high-grade Rubidium Carbonate (~97% Rb2CO3) from a combination of real and synthetic process solutions Yinnetharra • The Yinnetharra Lithium Project is an exploration project covering more than 2,300km2 within the Gascoyne Lithium Province of Western Australia • The current Yinnetharra Lithium and Tantalum Project Mineral Resource Estimate2 (MRE) is: o 21.9Mt @ 1.0% Li2O (at 0.5% Li2O cut-off) and 39.4Mt @ 102ppm Ta2O5 (at 65ppm Ta2O5 cut-off) • Drilling at the high-grade Jameson Prospect has intercepted: o 13m @ 1.96% Li2O from 101m in JREX065 • The current exploration program is 55% complete with four prospects yet to be tested Corporate • As of 31 March 2026, Delta’s cash balance was $52M and additional ASX-listed investments of circa $110M. Commenting on the quarter, Managing Director of Delta Lithium, Mr James Croser said: “During the quarter Delta continued to receive thick, high-grade lithium assays from Ballard’s in-fill drill program providing additional confidence to the Mt Ida lithium resource, and further core for ongoing metallurgy programs. 1 Intercepts are from Mt Ida gold drilling by Ballard Mining (BM1) & do not represent true widths 2 Yinnetharra Lithium and Tantalum MRE Update released to the ASX 31st March 2025 ASX ANNOUNCEMENT 23 April 2026 Delta has also initiated exploratory discussions with end-users and potential customers for rubidium from Mt Ida, aided by completion of downstream hydrometallurgical testwork showing the Mt Ida mica concentrate can produce battery grade lithium carbonate and rubidium carbonate at high recovery. This presents as a significant potential value-add and co-product revenue source from the existing spodumene flowsheet. “The drilling program at Yinnetharra completed during the quarter delivered modest outcomes to date at Jameson, with the remainder of assays due imminently. Field work and target generation at Yinnetharra continues for lithium and other metals.” Figure 1: Location of Delta’s Projects ASX ANNOUNCEMENT 23 April 2026 Mt Ida Project Mt Ida is located approximately 240km north of Kalgoorlie in Western Australia. The Project area resides on granted mining leases and is fully permitted for commencement of open pit and underground mining at the main Sister Sam, Timoni and Sparrow resources. Figure 2: Plan view to Mt Ida Project location with global resources Ballard Mining’s ongoing gold infill drill program has continued to return broad, high-grade mineralised lithium intervals. These intercepts demonstrate the excellent quality of the Mt Ida Lithium resource while also significantly increasing confidence in the model at minimal cost to Delta. These additional infill holes have been used to refine the existing MRE model and will be incorporated into the next resource update which is anticipated to increase Measured resources further – see Figure 3. Although the drillholes are oriented slightly obliquely due to the NW trending gold mineralisation, importantly the grade in these holes is consistently higher than existing models. ASX ANNOUNCEMENT 23 April 2026 Table 1 (below) provides summary of significant assays from the recent drilling. Further holes are expected to be received in the coming weeks. Hole ID From To Length Li2O % Ta2O5 ppm Rb2O % DFS406 251 285 34 1.86 171 0.65 DFS392 189 210 21 2.07 188 0.73 DFS395 196 227 31 1.84 150 0.56 DFS396 206 236 30 1.88 145 0.54 DFS398 209 240 31 1.37 190 0.46 DFS402 232 259 27 1.56 206 0.52 DFS406 251 285 34 1.86 171 0.65 DFS680 221 247 26 1.31 250 0.47 DFS695 249 265.17 16.17 2.12 224 0.69 and 268.49 283.07 14.58 1.77 247 0.62 DFS702 309 333 24 2 113 0.58 Table 1: Significant Intercepts from infill drilling of the current Mt Ida Lithium MRE Figure 3: View Southeast showing Sister Sam & Timoni MRE’s, Classification and recent lithium intercepts ASX ANNOUNCEMENT 23 April 2026 Whole Of Ore Flotation Flowsheet Work by the Company on the flowsheet design for onsite lithium concentration at Mt Ida3 has indicated that a Whole of Ore flotation process is optimal for lithium recovery. An integral part of this flowsheet is the removal of micas prior to the flotation of the spodumene, via a mica pre-float process, to prevent the interaction of these micas during the subsequent spodumene concentration steps. This is a well-understood and proven metallurgical methodology. As reported previously, the mica pre-float process at Mt Ida produces a lithium mica concentrate, predominantly lepidolite mineralisation, grading approximately 3% Li2O with a significant rubidium concentration 1.8% Rb2O. This mica concentrate represents a compelling opportunity for byproduct revenue due to the high-grade nature of the contained lithium and extremely high-grade rubidium. The rubidium at Mt Ida exists in the lepidolite crystal matrix due to uncommon substitution of the alkali metal potassium with the much rarer and heavier rubidium. Reserved concentrate from Delta’s previous metallurgical studies were combined and used to generate representative material to reflect a life of mine (LOM) composite of mica concentrate to be used in this downstream testwork. Figure 4: Mt Ida Whole of Ore concentrate flowsheet highlighting mica concentrate section This recent testwork on the mica concentrate has yielded successful production of battery grade lithium carbonate and high purity rubidium carbonate. Delta’s Mt Ida Lithium MRE contains one of the highest grade and largest publicly stated rubidium resources worldwide. Rubidium is included on the critical minerals lists of the USA and Japan and, discussions with various stakeholders in their respective supply chains have been instigated. 3 Refer ASX announcement 21 October 2025 “Mt Ida Project Lithium and Rubidium Update” ASX ANNOUNCEMENT 23 April 2026 Hydrometallurgical Testwork Mica Concentrate The concentrate tested is primarily lithium containing micas such as lepidolite. The mica also contains potassium, rubidium, caesium and gangue elements such as aluminium, iron, manganese and magnesium. The concentrate also contains small quantities of other minerals such as quartz, albite and a small amount of spodumene. Figure 5 – Coarse fraction of mica concentrate sample Hydrometallurgical Process The process to recover lithium, rubidium and potassium involves mixing the concentrate with concentrated sulfuric acid at an elevated temperature and atmospheric pressure to extract the metals into solution. The subsequent mixture is filtered and washed to separate the residue as waste. Leach extraction for lithium and rubidium from the mica concentrate is provided in Table 2. Table 2: - Lithium and rubidium leach extraction Element Leach extraction % Lithium 91.9 Rubidium 86.2 The hot leach liquor, containing the valuable lithium, potassium and rubidium is cooled to selectively crystallise potassium and rubidium alum salts – thus separating these elements from lithium. The resulting lithium solution, which contains impurities, is purified by neutralisation with limestone and lime, resulting in a gypsum (CaSO4.2H2O) rich residue waste that is filtered and removed. Lithium losses during impurity removal averaged 650ppm Li, which corresponds to 4.1% lithium loss. The remaining process solution, containing lithium and a small amount of sodium and potassium, proceeds to lithium precipitation. Lithium is recovered from the solution by precipitation with sodium carbonate. The lithium carbonate solids are filtered and washed, before being refined by re-dissolution and re-precipitation. The final solids produced are a high purity lithium carbonate product. ASX ANNOUNCEMENT 23 April 2026 Table 3: – Lithium crude and fine product purity Li2CO3 product K (ppm) Na (ppm) Ca (ppm) S (ppm) Li2CO3 purity (%) Crude 200 200 2,900 2,470 96.8 Refined 2.5 4.8 477 71 99.8 Figure 6 - Crude Li2CO3 (left), re-dissolution (centre), refined Li2CO3 (right) The alum salts produced from cooling the leach liquor are re-dissolved and the aluminium is removed by precipitation with limestone and lime. Potassium sulfate is selectively crystallised from the solution, and rubidium is recovered as a high-grade intermediate. The rubidium intermediate is re-dissolved and aluminium is precipitated using lime and removed before the rubidium rich solution is further concentrated by solvent extraction. During the solvent extraction process, process liquor is refined to increase the ratio of rubidium to potassium, which improves the purity of the final rubidium product. The aqueous solution is contacted with an organic solvent to selectively recover the rubidium from solution. The solvent is then stripped with formic acid to produce a concentrated rubidium formate solution. Rubidium formate is crystallised from the concentrated loaded strip solution and is decomposed in a kiln to produce rubidium carbonate. Development of the rubidium recovery process was conducted initially with Mt Ida material and concluded using synthetic solutions to confirm the process conditions. A subsample of the product was analysed via XRD mineralogy which confirmed the production of rubidium carbonate. Table 4: - Rubidium carbonate product assays Rubidium product Rb (%) K (%) Rb2CO3 (%) K2CO3 (%) Assay 71.7 1.79 96.8 3.2 ASX ANNOUNCEMENT 23 April 2026 Figure 7 - rubidium formate crystallisation (left), rubidium carbonate (right) The hydrometallurgical testwork demonstrated a viable process route to recover lithium and rubidium carbonate products from Mt Ida mica concentrate. The process utilises recycled process streams to minimise water consumption and valuable metal losses. As such, the process was modelled utilising metallurgical modelling software (Metsim® ) to develop mass and energy balances for the process based on real testwork results. The outcome of this modelling demonstrated that 86% of the lithium and 67% of the rubidium can be recovered to separate carbonate products. This is a great first result and further optimisation of the process is expected to improve recovery to final products. Future metallurgy optimisation work includes: • Optimisation of solvent extraction for improved rubidium-potassium separation. • Continuous closed-circuit operation (piloting) to demonstrate process in steady state. • Dewatering (thickening and filtration) testing on products and tailings streams Yinnetharra Project The Yinnetharra project is located in the Gascoyne region of Western Australia targeting lithium mineralisation. Delta Lithium has 2,300km2 of project tenure 100% owned and as Farm-in Joint Ventures. A MRE update for Yinnetharra was released in March 2025 of 21.9 Mt @ 1% Li2O and 75ppm Ta2O5 and an additional 17.5Mt @ 136ppm Ta2O5. Farm-In Joint Venture Agreements and acquisitions have expanded the prospective stratigraphy to over 80km in length of the Leakes Springs metasediment package. The Malinda Project is well advanced with DFS-level metallurgy and geotechnical studies4 completed on the M1 orebody and a mining lease application submitted over the area. The large regional tenure presents compelling upside potential for additional resource tonnes. As part of the current regional campaign commenced in November, exploration work has continued across the Project and JV tenure. The team have been conducting systematic surface exploration and mapping across prospective areas and generated over 25 prospects, with the drill testing of the high priority targets identified to date as seen in Figure 8. 4 Yinnetharra Operational & Metallurgical test work update released to the ASX 21st January 2025 ASX ANNOUNCEMENT 23 April 2026 Figure 8: Plan View to Yinnetharra MRE’s and drill targets for current exploration programs Jameson drilling of 6,072m targeted both Jameson South for the first time and follow-up drilling at Jameson North, proximal to the J1 resource. Drilling has been completed across Jameson South, intercepting the target structures in the fold limbs and hinges. Significant pegmatite intercepts were encountered in excess of 60m thick in a zone with anomalous surface geochemistry, however these pegmatites did not host any significant lithium and unfortunately do not appear to extend J1 further than the local area of the fold nose. The Jameson North program enjoyed some success, increasing confidence in the J1 resource. The best intercepts are summarised below in Table 5. Hole ID From To Length Li2O % Ta2O5 ppm Fe2O3 % JREX065 101 114 13 1.96 46 1.03 JREX067 90 92 2 1.87 64 1.1 Table 5: significant intercepts at Yinnetharra. Step out drilling at Jameson intersected substantial pegmatites but did not host significant lithium. A number of targets could not be tested as a result of difficult drilling conditions and substantial deviation caused by the strong regional fabric. As a result, some holes were abandoned and will serve as precollars for diamond tails to be drilled later this year, when Delta undertakes diamond drilling under an approved Exploration Incentive Scheme (EIS) drill program. ASX ANNOUNCEMENT 23 April 2026 Caribou prospect drilling comprised of 1,387m. This drilling targeted notable lithium anomalies at depth intercepted in the previous program. A sequence of pegmatites were intercepted within the prospective host stratigraphy, however they do not appear the correct composition to host lithium bearing minerals. Drilling continued to target Mason’s, Yamazaki, North Talisker, East Calypso and Perseverance, as well as Malinda extensions, with the program completed towards the end of the quarter. Numerous further pegmatites were intercepted with widths exceeding 30m. All samples have now left site and are awaiting assaying at the laboratory. A review of the project during the quarter also identified a number of areas of interest, particularly relating to fluorite, copper, beryllium and tungsten. Initial work was commenced and an assessment is underway to determine any value-add opportunities to the Yinnetharra Project. Mineralogy work is ongoing to refine geometallurgical domains across the resource. A detailed study is underway using FTIR (Fourier Transform Infared Spectroscopy) and TIMA (TESCAN Integrated Mineral Analyser) data to model lithium species mineralogy and distribution. This data is aimed to be incorporated into a study and coded within the block model to assist with flowsheet adjustments during a potential operational scenario. CORPORATE Delta’s ASX-listed investments at the end of the quarter consisted of 156M shares in BM1 (subject to escrow), 5M shares in MEX (formerly UVA) and 16.1M shares in JAV (post consolidation). Cash at the end of the quarter was $52M. ASX COMPLIANCE ASX Listing Rule 5.3.1: Exploration and Evaluation Expenditure during the March 2026 Quarter was $1.816M. Full details of exploration activity during the March 2026 Quarter are set out in this report. ASX Listing Rule 5.3.2: There was no substantive mining production and development activities during the March 2026 Quarter. ASX Listing Rule 5.3.5: Payments to related parties of the Company and their associates during the March Quarter: $172k - The Company advises that this relates to non-executive director’s fees and executive directors’ salaries and entitlements only. Please see Remuneration Report in the Annual Report for further details on Directors’ remuneration. Release authorised by the Board of Delta Lithium Limited. For further information, please contact: Delta Lithium Investor/Media Enquiries James Croser, Managing Director Sodali & Co Peter Gilford, CFO & Company Secretary Russell Quinn +61 403 322 097 +61 8 6109 0104 info@deltalithium.com.au ASX ANNOUNCEMENT 23 April 2026 About Delta Lithium Delta Lithium (ASX: DLI) is an exploration and development company focused on bringing high-quality, lithium-bearing pegmatite deposits, located in Western Australia, into production. With current global JORC compliant resources of 36.9Mt@1.0% Li2O, strong balance sheet and an experienced team driving the exploration and development workstreams, Delta Lithium is rapidly advancing its Projects. The Mt Ida Project has coincident gold and lithium orebodies and holds a critical advantage over other developers with existing Mining Leases and an approved Mining Proposal. Delta Lithium is pursuing a development pathway to unlock maximum value for shareholders. Delta has recently spun out its gold assets into Ballard mining on 14th July 2025 and retains a 34.4% equity stake in this company. Delta Lithium also holds the highly prospective Yinnetharra Lithium Project, with exciting lithium discoveries at the Malinda and Jamesons prospects. The Company is currently conducting exploration activities at Yinnetharra with fieldwork commenced for 2026 across our large tenure package, testing additional targets and aiming to build on the Maiden Resource at Malinda. Competent Person's Statement Information in this Announcement that relates to exploration results is based upon work undertaken by Mr. Shane Murray, a Competent Person who is a Member of the Australasian Institute of Geoscientists (AIG). Mr. Murray has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking 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’ (JORC Code). Mr. Murray Refer to www.deltalithium.com.au for past ASX announcements. Past Exploration results and Mineral Resource Estimates reported in this announcement have been previously prepared and disclosed by Delta Lithium in accordance with JORC 2012. The Company confirms that it is not aware of any new information or data that materially affects the information included in these market announcements. The Company confirms that the form and content in which the Competent Person's findings are presented here have not been materially modified from the original market announcement, and all material assumptions and technical parameters underpinning Mineral Resource Estimates in the relevant market announcement continue to apply and have not materially changed. Refer to www.deltalithium.com.au for details on past exploration results and Mineral Resource Estimates. Disclaimer This release may include forward-looking and aspirational statements. These statements are based on Delta Lithium management’s expectations and beliefs concerning future events as of the time of the release of this announcement. Forward-looking and aspirational statements are necessarily subject to risks, uncertainties and other factors, some of which are outside the control of Delta Lithium, which could cause actual results to differ materially from such statements. Delta Lithium makes no undertaking to subsequently update or revise the forward looking or aspirational statements made in this release to reflect events or circumstances after the date of this release, except as required by applicable laws and the ASX Listing Refer to www.deltalithium.com.au for past ASX announcements. ASX ANNOUNCEMENT 23 April 2026 JORC Tables Table 2: Global Lithium Mineral Resource Estimate Summary Delta Lithium Group Mineral Resource estimate (Li₂O only) Resource category Cut-off grade (Li₂O%) Li₂O Ta₂O₅ Rb2O Tonnes (Mt) Grade (% Li₂O) Li₂O (Kt) Grade (Ta₂O₅ ppm) Grade (Rb2O %) Yinnetharra Measured 0.5 - - - - Indicated 16.1 1.0 158 77 Inferred 5.8 0.9 54 69 Total Resource 21.9 1.0 212 75 Mt Ida Measured 0.3 - 0.5 0.5 1.1 5.9 256 0.39 Indicated 7.2 1.3 96 215 0.45 Inferred 7.1 1.1 83 126 0.38 Total Resource 14.8 1.2 190 173 0.42 Total Measured 0.5 1.1 5.5 256 0.39 Total Indicated 23.3 1.1 254 120 Total Inferred 12.9 1.0 137 100 Total 36.7 1.1 402 115 ASX ANNOUNCEMENT 23 April 2026 Table 3: Yinnetharra Tantalum Only MRE Yinnetharra Tantalum Only Resource March 2025 Area Resource category Cut-off grade (Ta2O5ppm) Tonnes (Mt) Li2O% Li2O (Kt) Ta2O5 ppm Ta2O5 (Kt) MT1 Measured 65 - - - - - Indicated 3.7 0.1 3 82 0.3 Inferred 0.6 0.0 0 94 0.1 Total Resource 4.3 0.1 4 84 0.4 MT20 Measured 65 - - - - - Indicated - - - - - Inferred 0.2 0.1 0 115 0.0 Total Resource 0.2 0.1 0 115 0.0 MT36 Measured 65 - - - - - Indicated 4.3 0.1 5 123 0.5 Inferred 0.6 0.1 1 106 0.1 Total Resource 4.9 0.1 5 121 0.6 MT42 Measured 65 - - - - - Indicated 0.3 0.2 1 175 0.1 Inferred 2.5 0.1 2 208 0.5 Total Resource 2.8 0.1 3 204 0.6 MT47 Measured 65 - - - - - Indicated 2.1 0.1 3 186 0.4 Inferred 0.5 0.1 0 257 0.1 Total Resource 2.5 0.1 3 199 0.5 MT67 Measured 65 - - - - - Indicated - - - - - Inferred 0.6 0.2 1 113 0.1 Total Resource 0.6 0.2 1 113 0.1 MT69 Measured 65 - - - - - Indicated - - - - - Inferred 1.6 0.1 2 105 0.2 Total Resource 1.6 0.1 2 105 0.2 MT70 Measured 65 - - - - - Indicated - - - - - Inferred 0.7 0.1 1 161 0.1 Total Resource 0.7 0.1 1 161 0.1 Total Measured - - - - Total Indicated 10.4 0.1 12 122 1.3 Total Inferred 7.1 0.1 7 156 1.1 Total 17.5 0.1 19 136 2.4 ASX ANNOUNCEMENT 23 April 2026 Appendix 1 – Tenement Listing Project Location Tenement Status Interest at start of Quarter Interest at end of Quarter Mt Ida ^ Western Australia E29/0640 Granted 100% 100% Mt Ida ^ Western Australia E29/0771 Granted 100% 100% Mt Ida ^ Western Australia E29/0944 Granted 100% 100% Mt Ida ^ Western Australia E29/0964 Granted 100% 100% Mt Ida ^ Western Australia E29/1238 Granted 100% 100% Mt Ida ^ Western Australia E29/1239 Granted 100% 100% Mt Ida ^ Western Australia E29/1240 Granted 100% 100% Mt Ida ^ Western Australia E29/1262 Application 100% 100% Mt Ida^ Western Australia E29/1288 Granted 100% 100% Mt Ida^ Western Australia E29/1292 Application 100% 100% Mt Ida^ Western Australia E29/1293 Granted 100% 100% Mt Ida^ Western Australia E29/1309 Application 100% 100% Mt Ida ^ Western Australia M29/0002 Granted 100% 100% Mt Ida ^ Western Australia M29/0094 Granted 100% 100% Mt Ida ^ Western Australia M29/0165 Granted 100% 100% Mt Ida ^ Western Australia M29/0422 Granted 100% 100% Mt Ida ^ Western Australia M29/0429 Granted 100% 100% Mt Ida ^ Western Australia M29/0444 Granted 100% 100% Mt Ida ^ Western Australia M29/0458 Application 100% 100% Mt Ida ^ Western Australia M29/0459 Application 100% 100% Mt Ida ^ Western Australia P29/2666 Granted 100% 100% Mt Ida ^ Western Australia P29/2667 Granted 100% 100% Mt Ida ^ Western Australia P29/2668 Granted 100% 100% Mt Ida ^ Western Australia P29/2669 Granted 100% 100% Mt Ida ^ Western Australia P29/2719 Application 100% 100% Mt Ida ^ Western Australia P29/2720 Application 100% 100% Mt Ida ^ Western Australia P29/2721 Application 100% 100% Mt Ida ^ Western Australia L29/166 Granted 100% 100% Mt Ida ^ Western Australia L29/171 Granted 100% 100% Mt Ida ^ Western Australia L29/186 Granted 100% 100% Mt Ida ^ Western Australia L29/229 Granted 50% 50% Mt Ida^** Western Australia L29/177 Granted 100% 100% Yinnetharra Western Australia E09/2169 Granted 100% 100% Yinnetharra Western Australia E09/2170 Granted 100% 100% Yinnetharra Western Australia E09/2283 Granted 100% 100% Yinnetharra Western Australia E09/2545 Granted 100% 100% Yinnetharra Western Australia E09/2621 Granted 100% 100% Yinnetharra Western Australia E09/2705 Granted 100% 100% Yinnetharra Western Australia E09/2716 Application 100% 100% ASX ANNOUNCEMENT 23 April 2026 Project Location Tenement Status Interest at start of Quarter Interest at end of Quarter Yinnetharra Western Australia E09/2772 Application 100% 100% Yinnetharra Western Australia E09/2806* Application 100% 100% Yinnetharra Western Australia E09/2808* Application 100% 100% Yinnetharra Western Australia E09/2814 Application 100% 100% Yinnetharra Western Australia E09/2997 Application 100% 100% Yinnetharra Western Australia E09/3024 Application 100% 100% Camel Hill2 Western Australia E09/23542 Granted 0% 0% Camel Hill2 Western Australia E09/23882 Granted 0% 0% Morrissey Hill2 Western Australia E09/23752 Granted 0% 0% Morrissey Hill2 Western Australia M09/1012 Granted 0% 0% Morrissey Hill2 Western Australia E09/28052* Application 0% 0% Morrissey Hill2 Western Australia E09/28072* Application 0% 0% Ti-Tree Project3 Western Australia E09/25033 Granted 0% 0% Ti-Tree Project3 Western Australia E09/25223 Application 0% 0% Ti-Tree Project3 Western Australia E09/29353 Application 0% 0% Aston Project Western Australia E09/2114 Granted 100% 100% Aston Project Western Australia E09/2156 Granted 100% 100% Aston Project Western Australia E09/2302 Granted 100% 100% Aston Project Western Australia E09/2358 Granted 100% 100% Aston Project Western Australia E09/2463 Granted 100% 100% Aston Project Western Australia E09/2464 Granted 100% 100% Aston Project Western Australia E09/2472 Granted 100% 100% Aston Project Western Australia E09/2607 Granted 100% 100% Aston Project Western Australia E09/2628 Granted 100% 100% Aston Project Western Australia E09/2629 Granted 100% 100% Aston Project Western Australia E09/2630 Granted 100% 100% Aston Project Western Australia E09/2641 Granted 100% 100% Aston Project Western Australia E09/2829 Granted 100% 100% Aston Project Western Australia E09/2967 Granted 100% 100% Aston Project Western Australia E09/2968 Granted 100% 100% Aston Project Western Australia E09/2789 Application 100% 100% Aston Project Western Australia E09/2796 Application 100% 100% Mortimer Hills Western Australia E09/2147 Granted 100% 100% ^ Ballard Mining Limited executed a Mineral Rights Deed with Delta Lithium Limited. Ballard Mining Ltd (via Mt Ida Au Pty Ltd) has exclusive rights to gold; Delta retains rights to all other minerals. On 9 July 2025 Ballard Mining ceased to be a subsidiary of Delta Lithium. *Application remains in ballot **Miscellaneous Licences are for the purpose for groundwater search only 2 Earn-In & JV Agreement with Reach Resources Limited for Camel Hill & Morrissey Hill Projects Rule 5.5 ASX Listing Rules Appendix 5B (17/07/20) Page 1 + See chapter 19 of the ASX Listing Rules for defined terms. Appendix 5B Mining exploration entity or oil and gas exploration entity quarterly cash flow report Name of entity Delta Lithium Limited (ASX Code: DLI) ABN Quarter ended (“current quarter”) 67 107 244 039 31 MARCH 2026 Consolidated statement of cash flows Current quarter $A’000 Year to date (9 months) $A’000 1. Cash flows from operating activities - - 1.1 Receipts from customers 1.2 Payments for (591) (610) (a) exploration & evaluation (if expensed) (b) development - - (c) production - - (d) staff costs (551) (1,973) (e) administration and corporate costs (1,187) (2,029) 1.3 Dividends received (see note 3) - - 1.4 Interest received 564 1,702 1.5 Interest and other costs of finance paid (9) (30) 1.6 Income taxes paid - - 1.7 Government grants and tax incentives 1,273 1,347 1.8 Other (provide details if material) - - 1.9 Net cash from / (used in) operating activities (501) (1,593) 2. Cash flows from investing activities - - 2.1 Payments to acquire or for: (a) entities (b) tenements - - (c) property, plant and equipment - (8) (d) exploration & evaluation (if capitalised) (1,816) (8,238) (e) investments - - (f) other non-current assets - - Appendix 5B Mining exploration entity or oil and gas exploration entity quarterly cash flow report ASX Listing Rules Appendix 5B (17/07/20) Page 2 + See chapter 19 of the ASX Listing Rules for defined terms. Consolidated statement of cash flows Current quarter $A’000 Year to date (9 months) $A’000 2.2 Proceeds from the disposal of: - (1,377) (a) entities (b) tenements - - (c) property, plant and equipment 522 579 (d) investments - - (e) other non-current assets - - 2.3 Cash flows from loans to other entities - - 2.4 Dividends received (see note 3) - - 2.5 Other (provide details if material) - - 2.6 Net cash from / (used in) investing activities (1,294) (9,044) 3. Cash flows from financing activities - - 3.1 Proceeds from issues of equity securities (excluding convertible debt securities) 3.2 Proceeds from issue of convertible debt securities - - 3.3 Proceeds from exercise of options - - 3.4 Transaction costs related to issues of equity securities or convertible debt securities (1) (3) 3.5 Proceeds from borrowings - - 3.6 Repayment of borrowings from Associates - 4,444 3.7 Transaction costs related to loans and borrowings - - 3.8 Dividends paid - - 3.9 Principle payments of lease liability (39) (114) 3.10 Net cash from / (used in) financing activities (40) 4,327 4. Net increase / (decrease) in cash and cash equivalents for the period 4.1 Cash and cash equivalents at beginning of period 53,997 58,472 4.2 Net cash from / (used in) operating activities (item 1.9 above) (501) (1,593) 4.3 Net cash from / (used in) investing activities (item 2.6 above) (1,294) (9,044) 4.4 Net cash from / (used in) financing activities (item 3.10 above) (40) 4,327 Appendix 5B Mining exploration entity or oil and gas exploration entity quarterly cash flow report ASX Listing Rules Appendix 5B (17/07/20) Page 3 + See chapter 19 of the ASX Listing Rules for defined terms. Consolidated statement of cash flows Current quarter $A’000 Year to date (9 months) $A’000 4.5 Effect of movement in exchange rates on ca