UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549  

Form 6-K

REPORT OF FOREIGN PRIVATEISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGEACT OF 1934

Forthe month of August, 2025

Commission File Number:001-42170 

Collective Mining Ltd.

(Translation of registrant’sname into English)

82 Richmond Street East, 4th Floor

Toronto, Ontario

Canada, M5C 1P1

(Address of principal executiveoffice)

Indicate by check mark whether the registrant files or willfile annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☐ Form40-F ☒

SIGNATURES

Pursuant to the requirementsof the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereuntoduly authorized.

Exhibit99.1

Collective Mining Drills 183.70 Metres at 3.01g/t Gold Equivalent Commencing from 37.30 Metres Downhole at the Apollo System

TORONTO, Aug. 20, 2025 /CNW/ - Collective MiningLtd. (NYSE: CNL) (TSX: CNL) ("Collective" or the "Company") is pleased to announce assay results for fourdiamond drill holes designed to better outline and expand the shallow portion of gold-silver-copper-tungsten mineralization at the Apollosystem ("Apollo").  Apollo, which begins at surface, is strongly mineralized over 1,200 vertical metres, is open at depthand is the most advanced discovery made to date within the Company's multi-target, Guayabales Project in Caldas, Colombia.

The Company currently has eleven drill rigs operatingas part of its fully funded 70,000 metre drill program for 2025 with eight rigs operating at the Guayabales Project and three rigs turningat the San Antonio Project. Drilling at the Guayabales Project is focused on multiple objectives which include defining shallow mineralization,expanding and identifying new high-grade sub-zones, expanding the high-grade Ramp Zone at depth and testing new targets. Two deep capacitydrill rigs are now at Apollo with the first rig now drilling a mother hole after successfully extending a previous step-out hole whichfailed to reach its intended depth when targeting the Ramp Zone (assays results pending). A second deep capacity rig has recently arrivedat site and is expected to begin drilling a second mother hole to test the high-grade Ramp Zone discovery within the next two weeks.

Approximately 133,000 metres of diamond drilling hasbeen completed to date at the Guayabales Project, including 93,000 metres at Apollo. There are currently twenty-five drill holes in thelab with assay results for most of these holes expected in the near term.

Ari Sussman, Executive Chairman commented: "Asthe shallow drill program at Apollo approaches its conclusion, we continue to improve upon the internal block model by intersecting extraordinarygrades of gold, silver, copper and tungsten. We are also pleased that the second large capacity rig to test the Ramp Zone below Apollohas arrived on site and will begin operating shortly. We expect to begin intersecting the Ramp Zone next month with a series of directionalholes with a goal of expanding the zone up to 300 meters along strike and below current drilling.  Additionally, we are evaluatingbringing a third deep capacity rig for the Ramp Zone in order further expand the Ramp drilling program."

Details (see Table 1 and Figures 1-2)

Table 1: Assays Results for Drill Holes APC-132,APC-134, APC-135 and APC-136

AuEq (g/t) is calculated as follows: (Au (g/t)x 0.97) + (Ag (g/t) x 0.015 x 0.85) + (Cu (%) x 1.44 x 0.95) + (WO₃ (%) x 4.84 x 0.72) utilizing metal prices of Au - US$2,200/oz,Ag - US$33/oz, Cu - US$4.62/lb and WO₃ - US$15.51/lb and recovery rates of 97% for Au, 85% for Ag, 95% for Cu and 72% for WO₃.Recovery rate assumptions for metals are based on metallurgical results announced on October 17, 2023, April 11, 2024, and October 3,2024. True widths are between 60%-100% of the total length and grades are uncut.

The Company has received assay results for two diamonddrill holes completed at the Knife target and did not intersect any significant mineralization. As a result, the Knife target has beenremoved from the Company's inventory of greenfield drill targets at the Guayabales Project.

The significant backlog of drill holes at the laboratoryin Peru is being rectified and accordingly the Company expects to be releasing assay results at an accelerated rate for the foreseeablefuture.

Figure 1: Plan View of the Apollo System HighlightingDrill Holes Announced in this Release (CNW Group/Collective Mining Ltd.)

Figure 2: Plan View of the Guayabales Project Highlightingthe Apollo Target Area (CNW Group/Collective Mining Ltd.)

About Collective Mining Ltd.

To see our latest corporate presentation and relatedinformation, please visit www.collectivemining.com.

Founded by the team that developed and sold ContinentalGold Inc. to Zijin Mining for approximately $2 billion in enterprise value, Collective is a gold, silver, copper and tungsten explorationcompany with projects in Caldas, Colombia. The Company has options to acquire 100% interest in two projects located directly within anestablished mining camp with ten fully permitted and operating mines.

The Company's flagship project, Guayabales, is anchoredby the Apollo system, which hosts the large-scale, bulk-tonnage and high-grade gold-silver-copper-tungsten Apollo system. The Company'sobjectives are to improve the overall grade of the Apollo system by systematically drill testing newly modeled potentially high-gradesub-zones, expand the newly discovered high-grade Ramp Zone along strike and to depth and drill a series of greenfield generated targetson the property. 

Additionally, the Company has launched its largestdrilling campaign in history at the San Antonio Project as it hunts for new discoveries and looks to expand upon the newly discoveredporphyry system at the Pound target. The San Antonio Project is located between two to five kilometers east-northeast of the GuayabalesProject and could potentially share infrastructure given their close proximity to each other.

Management, insiders, a strategic investor and closefamily and friends own 44.5% of the outstanding shares of the Company and as a result, are fully aligned with shareholders. The Companyis listed on both the NYSE American and TSX under the trading symbol "CNL".

Qualified Person (QP) and NI43-101 Disclosure

David J Reading is the designated Qualified Personfor this news release within the meaning of National Instrument 43-101 ("NI 43-101") and has reviewed and verified that thetechnical information contained herein is accurate and approves of the written disclosure of same. Mr. Reading has an MSc in EconomicGeology and is a Fellow of the Institute of Materials, Minerals and Mining and of the Society of Economic Geology (SEG).

Technical Information

Samples were cut by Company personnel at CollectiveMining's core facility in Caldas, Colombia. Diamond drill core was sawed and then sampled in maximum 2 metres intervals, stopping at geologicalboundaries. Drill hole core diameter is a mix of PQ, HQ and NQ depending on the depth of the drill hole.

Core samples have been prepared and analyzed at ALSlaboratory facilities in Medellin, Colombia and Lima, Peru. Blanks, duplicates, and certified reference standards are inserted into thesample stream to monitor laboratory performance. Crush rejects and pulps are kept and stored in a secured storage facility for futureassay verification. No capping has been applied to sample composites. The Company utilizes a rigorous, industry-standard QA/QC program.

Information Contact:

Follow Executive Chairman Ari Sussman (@Ariski73) onX

Follow Collective Mining (@CollectiveMini1) onX, (Collective Mining) on LinkedIn, and (@collectivemining) on Instagram

FORWARD-LOOKING STATEMENTS 

This news release contains "forward-looking statements"and "forward-looking information" within the meaning of applicable securities legislation (collectively, "forward-lookingstatements"). All statements, other than statements of historical fact, are forward-looking statements and are based on expectations,estimates and projections as at the date of this news release. Any statement that involves discussion with respect to predictions, expectations,beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always using phrases such as "plans","expects", "is expected", "budget", "scheduled", "estimates", "forecasts","intends", "anticipates", or "believes" or variations (including negative variations) of such words andphrases, or state that certain actions, events or results "may", "could", "would", "might" or"will" be taken, occur or be achieved) are not statements of historical fact and may be forward-looking statements. In thisnews release, forward-looking statements relate, among other things, to: the anticipated advancement of mineral properties or programs;future operations; future recovery metal recovery rates; future growth potential of Collective; and future development plans.

These forward-looking statements, and any assumptionsupon which they are based, are made in good faith and reflect our current judgment regarding future events including the direction ofour business. Management believes that these assumptions are reasonable. Forward-looking statements involve known and unknown risks, uncertaintiesand other factors which may cause the actual results, performance or achievements of the Company to be materially different from any futureresults, performance or achievements expressed or implied by the forward-looking statements. Such factors include, among others: risksrelated to the speculative nature of the Company's business; the Company's formative stage of development; the Company's financial position;possible variations in mineralization, grade or recovery rates; actual results of current exploration activities; conclusions of futureeconomic evaluations; fluctuations in general macroeconomic conditions; fluctuations in securities markets; fluctuations in spot and forwardprices of gold, precious and base metals or certain other commodities; fluctuations in currency markets; change in national and localgovernment, legislation, taxation, controls regulations and political or economic developments; risks and hazards associated with thebusiness of mineral exploration, development and mining (including environmental hazards, industrial accidents, unusual or unexpectedformation pressures, cave-ins and flooding); inability to obtain adequate insurance to cover risks and hazards; the presence of laws andregulations that may impose restrictions on mining; employee relations; relationships with and claims by local communities and indigenouspopulations; availability of increasing costs associated with mining inputs and labour; the speculative nature of mineral explorationand development (including the risks of obtaining necessary licenses, permits and approvals from government authorities); and title toproperties, as well as those risk factors discussed or referred to in the annual information form of the Company dated March 24, 2025.Forward-looking statements contained herein are made as of the date of this news release and the Company disclaims any obligation to updateany forward-looking statements, whether as a result of new information, future events or results, except as may be required by applicablesecurities laws. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future eventscould differ materially from those anticipated in such statements and there may be other factors that cause results not to be anticipated,estimated or intended. Accordingly, readers should not place undue reliance on forward-looking statements.

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SOURCE Collective Mining Ltd.

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%CIK: 0001953575

For further information: Investors and Media: Paul Begin, Chief FinancialOfficer, p.begin@collectivemining.com, +1 (416) 451-2727

CO: Collective Mining Ltd.

CNW 06:30e 20-AUG-25