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

Mergers & Acquisitions

Acquisition of Option to Buy Lepidico's

Interest in Karibib Lithium, Rubidium and

Cesium Project in Namibia - Update

Vancouver, British Columbia--(Newsfile Corp. - October 28, 2025) - International Lithium Corp. (TSXV:

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

Company

" or "

ILC

") is pleased to announce, further to its

announcement on September 09, 2025, that on October 24, 2025 Lepidico met all the drawdown

conditions for completion of its secured loan from ILC and that this has now been increased to the full

amount of CAD$ 510,000. Of this loan amount CAD$420,000 earns interest at the rate of 10% p.a.

There were various conditions for the drawdown of the remaining loan, including a key condition now met

that, by full drawdown, there would be no debt owed by Lepidico Mauritius or its subsidiaries to its

ultimate Australian parent, Lepidico Ltd., which is in liquidation.

ILC now holds without any conditions 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. The actual net amount payable by ILC on option exercise will be the

difference between CAD$975,000 payable by ILC for the option exercise and the repayment to ILC of

loan principal of CAD$510,000 plus interest accrued to the date of option exercise. The option has been

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

below).

It is important to reiterate 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

now expected to conclude at any time from now until the end of 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 arising from events that occurred seven years ago.

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.

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 both under JORC standards.

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. Fuller details are as set out in our news release of

September 9, 2025.

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.

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."

About International Lithium Corp.

International Lithium Corp. is a Critical Minerals exploration company with 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

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

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/272194