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Acquisition of Option to Buy Lepidico's Interest in Karibib Lithium, Rubidium and Cesium Project in Namibia

Mergers & Acquisitions

Acquisition of Option to Buy Lepidico's

Interest in Karibib Lithium, Rubidium and

Cesium Project in Namibia

Vancouver, British Columbia--(Newsfile Corp. - September 9, 2025) - International Lithium Corp. (TSXV:

ILC) (OTCQB: ILHMF) (FSE: IAH) (the "

Company

" or "

ILC

") is pleased to announce that on September

04, 2025 it acquired an option from Lepidico (Canada) Inc. ("Lepidico Canada") to buy 100% of the

shares of Lepidico (Mauritius) Ltd. ("Lepidico Mauritius")

on a debt-free basis for consideration of

CAD$975,000 plus certain payments in the future that are contingent on and linked to various possible

receipts by Lepidico Canada. Lepidico Mauritius in turn owns 80% of Lepidico Chemicals Namibia (Pty)

Ltd. ("Lepidico Namibia"), which owns the Karibib Lithium, Rubidium and Cesium project in Namibia.

Assuming the transaction goes ahead with ILC exercising its option, the Company would leapfrog, by

several years, the development stage of other projects it is interested in, including those in Zimbabwe

and:

have one of the largest rubidium resources in Africa and (per our own research and also using

Grok) the largest disclosed rubidium resource in Africa, as well as one of the most extensive

rubidium resources in North America through ILC's existing Raleigh Lake project in Ontario;

be well-positioned for an upswing in the lithium market; and

strengthen its stance as one of the leading global players in the rubidium market and a company

with some of the most significant cesium interests of any non-Chinese company.

The parties have signed a secured loan agreement whereby ILC lends CAD$510,000 to Lepidico

Canada. Of the principal amount, CAD$420,000 accrues interest at 10% per annum. If ILC exercises the

option, this loan plus interest will be repayable in full from the option exercise proceeds. The option has

been granted until the later of November 30, 2025, and 30 days after the arbitration outcome is known

(see below). A total of CAD$285,000 has already been advanced to Lepidico. There are various

conditions for the drawdown of the remaining CAD$225,000, including standard regulatory approvals

and a key condition that, by drawdown, there will be no debt owed by Lepidico Mauritius or its

subsidiaries to its ultimate Australian parent, Lepidico Ltd., which is in liquidation. A condition in the

option agreement is that Lepidico Mauritius and its subsidiaries will have no debt owed to other previous

Lepidico group companies at the time of option exercise.

It is important to emphasize that there is a possibility that the option may not be exercised, especially if

Lepidico Namibia encounters an adverse outcome in an arbitration dispute with the Chinese company

Jiangxi Jinhui Lithium Co. Ltd., which involves claims and counterclaims. This arbitration in Singapore is

expected to conclude in September or October 2025. Conversely, if the arbitration is resolved positively,

ILC and Lepidico Canada have agreed that 30% of the net proceeds after legal and other costs will be

retained by the part of the Lepidico group that ILC would be acquiring, with the remaining 70% paid to

Lepidico Canada. The deal structure reflects ILC's reluctance to assume the risk of a negative arbitration

award concerning events that occurred seven years ago.

Lepidico's ownership of Karibib resulted from its 2019 acquisition of TSXV-listed Desert Lion Energy in

exchange for shares and other securities valued at that time at AUD$ 22.9 million (approximately

CAD$20.7 million). Since acquiring the company in 2019, Lepidico has invested a further AUD$ 12.1

million (approximately CAD$ 10.9 million) in the Karibib project, excluding central group overheads, with

a significant portion directed towards drilling, an environmental study and subsequently a Definitive

Feasibility Study and a further Resource Estimate.

The Karibib Project comprises two areas near Karibib, Namibia, with fully permitted mining licences

known as Rubicon and Helikon (also in various reports spelled Helicon), along with an Exclusive

Prospecting Licence EPL5439 for an adjacent area.

A Definitive Feasibility Study (the "DFS Report") was announced on May 28, 2020 by Lepidico Ltd. (a

public company then listed on the Australian Securities Exchange) based on JORC Code (2012) Mineral

Resources and Ore Reserves estimates for the Rubicon and Helikon deposits. The DFS Report is titled

"Phase 1 Project - Definitive Feasibility Study Report", and has a publication date of July 10, 2020. It

was produced by Lepidico Ltd. who managed the feasibility study listing around 28 organisations with

particular expertise in the specific areas of input as contributors to the DFS Report. The DFS Report and

ASX announcements regarding the Karibib project, including resource estimates and other pertinent

information to the Karibib project are available on Lepidico's website:

www.lepidico.com

.

In Lepidico's news release dated January 30, 2023 Lepidico announced an overall Karibib Project

Mineral Resource update as of 31 December 2022 prepared by Cube Consulting which is detailed in

the following table. The numbers in this table (the "Historical

Estimate") are subject to various

assumptions and parameters which are detailed later in this announcement. The Company is not aware

of any more recent estimates.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/3232/265688_8f7ed2e8b4b4ab0b_003full.jpg

Although the technical information announced by Lepidico was produced according to the requirements

of JORC Code (2012), ILC is treating this information as historical information. The Company does

however believe, and this thinking was part of its decision to proceed with the transaction, that the

mineral resource estimates are likely to be reliable and relevant firstly since JORC Code (2012) is one

of the most widely recognized and respected mineral resource reporting standards globally, and

secondly there has been no mining activity since the last resource estimate. ILC has not engaged a

"Qualified Person" as defined by NI 43-101 to independently verify or complete sufficient additional work

to determine the relevance and reliability of the information. The Company's QP has not done sufficient

work to make the resource current and the Company is not treating the resource as current. Only if the

option is exercised would ILC, at its own discretion, complete the further technical work and review and

evaluation of the information and data supporting the Lepidico information in the DFS Report and/or the

Lepidico mineral resource estimates to bring them to current for ILC under NI 43-101. Mineral resources

are not mineral reserves and although Lepidico has reported a Definitive Feasibility Study for the

project, there is no guarantee that further work will result in an economic mining scenario.

It is believed, based on published data, that as well as its significant lithium resource, the Karibib project

contains the largest (or one of the two largest) rubidium resources of any project in Africa (the others

being in Zimbabwe and Zambia). At the same time, the amount of cesium is smaller but nevertheless

equal to about one year of global demand. For cesium Sinomine has historically been the largest

producer in Africa, and has recently restarted cesium production at its Bikita project in Zimbabwe by

extracting pollucite from petalite tailings. Sinomine is also known to have rubidium from the lepidolite at

Bikita, but we are not aware of any resource estimate.

If the option is exercised, ILC would, subject to confirming the resource as its own resource (and not a

historical resource as it is presently treating it) have the largest known or at least the largest disclosed

rubidium resource in Africa. The Company also has extensive rubidium resources in North America

through its Raleigh Lake project in Ontario. Please refer to the Company's "The Raleigh Lake Project -

NI 43-101 Technical Report PEA" dated January 18, 2024 by ERM Consultants Canada Ltd. and the

seven named QPs in the report. This report was filed on SEDAR+ on 18 January, 2024.

John Wisbey, Chairman of ILC, stated:

"This potential acquisition marks a significant

advancement for ILC globally - particularly in Southern Africa. With this single transaction for a

project that reached the Definitive Feasibility Study stage under JORC in 2020 and was

upgraded in 2022, the Company would leapfrog, by several years, the development stage of

other projects we are interested in, including those in Zimbabwe."

"Assuming the transaction goes ahead with ILC exercising its option, ILC will be well-

positioned for an upswing in the lithium market, as well as strengthening its stance as one of

the leading global players in the rubidium market and a company with some of the most

significant cesium interests of any non-Chinese company."

Babak Vakili Azar, P. Geo., a Qualified Person as defined by NI 43-101 and a consultant to ILC, has

reviewed and approved the technical contents of this news release.

Notes on the Historical Estimate mentioned above

The mineral resource estimates presented in the table above (the "Historical Estimate") were

documented as subject to the following assumptions and parameters:

There are multiple effective dates, reflecting work on various hard rock deposits and stockpiles

over a four year period by multiple consulting groups.

Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.

The estimate of Mineral Resources may be materially affected by environmental, permitting, legal,

title, taxation, socio-political, marketing, or other relevant issues.

Mineral Resources for hard rock deposits are reported at a block cut-off grade of ≥ 0.15% or

0.20% Li

2

O for all oxidation types.

Mineral Resources for stockpiles, dumps and tailings are reported at a 0.0% Li

2

O cut-off grade.

The analysis suite across the deposits and stockpiles was inconsistent and hence average

element reporting across all deposits and stockpiles cannot be completed.

Different components of the Karibib Project have been reported at different times through different

consultancy groups, using different Competent Persons.

The assumed mining method is by open cut.

Cost, bulk density and recovery inputs used to report the Mineral Resource have varied over time,

and relate to the different effective dates for those individual resources.

Figures may not add up due to rounding.

The Historical Estimate reports categories of mineral resource using the terms "inferred mineral

resource", "indicated mineral resource" and "measured mineral resource" as ascribed under JORC

Code (2012). These terms also have specific meanings ascribed to them by the Canadian Institute of

Mining, Metallurgy and Petroleum, as the CIM Definition Standards on Mineral Resources and Mineral

Reserves adopted by CIM Council, as amended. These standards are generally considered

interchangeable in the global mining industry with key differences pertaining to disclosure being that NI

43-101 has more prescriptive requirements for the content of technical reports while JORC allows more

flexibility in reporting but requires clear explanation of the basis for estimates.

The Historical Estimate is considered to be the most recent and pertinent technical disclosure regarding

the Karibib project that is currently available to the Company. If the Company decides to exercise the

option,

the Company will review the technical reports utilizing Qualified Persons as defined by NI 43-101

to determine which, if any at all, of the mineral resource estimates require additional work to comply with

the CIM Definition Standards on Mineral Resources and Mineral Reserves prior to advancing the project

or undertaking the necessary work to upgrade or verify the Historical Estimate as current mineral

resources or mineral reserves.

About International Lithium Corp.

International Lithium Corp. has exploration activities in Ontario, Canada, with intentions to expand into

Southern Africa. It has projects at various stages, ranging from Definitive Feasibility Study at Rubicon in

Namibia (note that ILC currently has an option only and is treating this as historic information at this point

and not a current resource for ILC) to Preliminary Economic Assessment at Raleigh Lake (as noted

above) to Pre-Drilling at Wolf Ridge. The primary target metals in Canada are lithium, rubidium and

copper. There are three projects (two in Ontario and one in Ireland) in which ILC has sold its share but

where we stand to receive future payments from either a resource milestone being achieved or from a

Net Smelter Royalty. In Namibia the Karibib project contains lithium, rubidium and cesium.

While the world's politicians are currently divided on the future of the energy market's historic

dependence on oil and gas and on "Net Zero", there is in any scenario an ever increasing and significant

demand for electricity driven by AI and data centres, and by a likely unstoppable momentum towards

electric vehicles and grid-scale electricity storage. All these contribute to rising demand for lithium and

copper as well as other metals. Rubidium is also a valuable critical metal that is strategic for high-

precision clocks and for space technology. We have seen the politically driven and increasingly urgent

wish by the USA, Canada, EU and other major economies to safeguard their supplies of critical metals

and to become more self-sufficient. Our Canadian and Southern African projects, which contain lithium,

rubidium, cesium and copper, are strategic in that respect.

Our key mission for the next decade is to generate revenue for our shareholders from lithium and other

battery metals, as well as rare metals, while also contributing to the creation of a greener, cleaner planet

and less polluted cities.

This includes optimizing the value of our existing projects in Canada as well as finding, exploring and

developing projects that have the potential to become world-class deposits. We have announced that we

regard Southern Africa as a key strategic target market for ILC and, in addition to Namibia, we have

applied for and hope to receive EPOs in Zimbabwe. We hope to make further announcements on the

portfolio developments over the next few weeks and months.

The Company's interests in various projects now consist of the following, and in addition, the Company

continues to seek other opportunities:

Name

Metal

Location

Stage

Area in Hectares

Current

Ownership

Percentage

Future

Ownership

% if options

exercised

and/or

residual

interest

Operator or

JV Partner

Rubicon +

Helikon +

Exclusive Prospecting

Licence

Lithium

Rubidium

Cesium

Karibib, Namibia

2021 : Feasibility

Study completed

for Li, Rb and Cs

29,500

0 %

80%

Lepidico; ILC if

option exercised

Raleigh Lake

Lithium

Rubidium

Ontario

Dec 2023 : PEA

for Li completed

Apr 2023 Maiden

Resource

Estimates for Li

and Rb

32,900

100%

100%

ILC

Firesteel

Copper

Cobalt

Ontario

Aeromagnetics

and Drilling

started mid 2024

6,600

90%

90%

ILC

Wolf Ridge

Lithium

Ontario

Pre-Drilling

5,700

0%

100%

ILC

Mavis Lake

Lithium

Ontario

May 2023

Maiden Resource

Estimate

2,600

0%

0%

(carries an extra

earn-in payment

of AUD$ 0.75

million if resource

targets met)

Critical Resources

Limited

(ASX:CRR)

Avalonia

Lithium

Ireland

Drilling

29,200

0%

0%

2.0% Net Smelter

Royalty

GFL Intl Co Ltd.

(owned by

Ganfeng Lithium

Group Co. Ltd)

Forgan/

Lucky Lakes

Lithium

Ontario

Drilling

< 500

0%

0%

1.5% Net Smelter

Royalty

Power Minerals

Limited

(ASX:PNN)

The Company's primary strategic focus at this point is on the Raleigh Lake Project, comprising lithium

and rubidium, and the Firesteel copper project in Canada, as well as obtaining EPOs and mineral

claims in Zimbabwe. The Karibib projects in Namibia, including further development on the EPL there,

will become a high focus if ILC exercises its option there.

The Raleigh Lake Project now encompasses 32,900 hectares (329 square kilometres) of mineral claims

in Ontario and represents ILC's most significant project in Canada. To date, drilling has occurred on less

than 1,000 hectares of our claims. A Preliminary Economic Assessment was published for ILC's lithium

at Raleigh Lake in December 2023, with a detailed economic analysis of ILC's separate rubidium

resource still pending. Raleigh Lake is 100% owned by ILC, free from any encumbrances and royalties.

The Raleigh Lake Project boasts excellent access to roads, rail, and utilities.

A continuing goal has been to remain a well-funded company to turn our aspirations into reality.

Following the disposal of the Mariana project in Argentina in 2021, the Mavis Lake project in Canada in

2022, and the Avalonia project in 2025, ILC continues to achieve sufficient inward cash flow to be able to

make progress with its exploration projects.

With the increasing demand for high-tech rechargeable batteries used in electric vehicles, electrical

storage, and portable electronics, lithium has been designated "the new oil" and is a key part of a green

energy, sustainable economy. By positioning itself with projects that have significant resource potential

and solid strategic partners, ILC aims to be one of the preferred lithium and rare metals resource

developers for investors and to continue building value for its shareholders for the rest of the 2020s, the

decade of battery metals.

On behalf of the Company,

John Wisbey

Chairman and CEO

www.internationallithium.ca

For further information concerning this news release, please contact +1 604-449-6520 or

[email protected]

or

[email protected]

Neither 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 release.

Cautionary Statement Regarding Forward-Looking Information

Except for statements of historical fact, this news release or other releases contain certain "forward-

looking information" within the meaning of applicable securities law. Forward-looking information or

forward-looking statements in this or other news releases may include: the timing of completion of any

offering and the amount to be raised, the likelihood or otherwise of the Company exercising its option

on Lepidico Mauritius, the outcome of arbitration involving Lepidico Namibia, the effect of results of

anticipated production rates, the timing and/or anticipated results of drilling on the Karibib or Raleigh

Lake or Firesteel or Wolf Ridge projects, the expectation of resource estimates, preliminary economic

assessments, feasibility studies, lithium or rubidium or copper recoveries, modeling of capital and

operating costs, results of studies utilizing various technologies at the company's projects, the

Company's budgeted expenditures, future plans for expansion in Southern Africa and planned

exploration work on its projects, increased value of shareholder investments in the Company, the

potential from the Company's third party earn-out or royalty arrangements, the future demand for

lithium, rubidium, cesium and copper, and assumptions about ethical behaviour by our joint venture

partners or third party operators of projects or royalty partners. Such forward-looking information is

based on assumptions and subject to a variety of risks and uncertainties, including but not limited to

those discussed in the sections entitled "Risks" and "Forward-Looking Statements" in the interim and

annual Management's Discussion and Analysis which are available at

www.sedarplus.ca

. While

management believes that the assumptions made are reasonable, there can be no assurance that

forward-looking statements will prove to be accurate. Should one or more of the risks, uncertainties or

other factors materialize, or should underlying assumptions prove incorrect, actual results may vary

materially from those described in forward-looking information. Forward-looking information herein,

and all subsequent written and oral forward-looking information are based on expectations, estimates

and opinions of management on the dates they are made that, while considered reasonable by the

Company as of the time of such statements, are subject to significant business, economic, legislative,

and competitive uncertainties and contingencies. These estimates and assumptions may prove to be

incorrect and are expressly qualified in their entirety by this cautionary statement. Except as required

by law, the Company assumes no obligation to update forward-looking information should

circumstances or management's estimates or opinions change.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/265688