Caledonia Mining files Motapa, Blanket mine reports

Finalization of Blanket Mine’s life-of-mine plan is expected to result in an updated mineral reserve estimate before the end of this year.

Rhea-AI Filing Summary

Caledonia Mining Corp Plc (CMCL) filed NI 43-101 technical reports on SEDAR+ supporting the maiden mineral resource estimates for Motapa and updated mineral resource estimates for Blanket Mine, announced August 28, 2026. Caledonia said the reports do not result in material changes to the scientific or technical information in those announcements. Blanket Mine’s life-of-mine plan is in development; its finalization is expected to result in an updated mineral reserve estimate before the end of this year. The reports are available under the company’s profile on SEDAR+.

Key Terms

National Instrument 43-101, maiden mineral resource estimates, mineral reserve estimate, life of mine plan

4 terms

National Instrument 43-101 regulatory

"National Instrument 43-101 (“NI 43-101”) technical reports"

National Instrument 43-101 is a set of rules and guidelines that govern how mineral exploration and mining companies must report information about their projects. It ensures that the details shared with investors are accurate, consistent, and reliable—similar to how a detailed, verified blueprint ensures a building’s safety. This helps investors make informed decisions based on trustworthy information about a company's mineral resources.

maiden mineral resource estimates technical

"maiden mineral resource estimates at Motapa"

mineral reserve estimate technical

"an updated mineral reserve estimate before the end of this year"

A mineral reserve estimate is an expert calculation of how much economically recoverable mineral material exists at a site after accounting for costs, technology and legal permissions; think of it as the amount of usable, sellable product a mine is expected to produce. Investors care because it directly affects a project’s potential revenue, timeline and risk—larger, more certain reserves usually mean higher asset value and lower uncertainty about future cash flow.

life of mine plan technical

"The life of mine plan for Blanket Mine is in development"

A life of mine plan is a detailed engineering and financial roadmap that projects how a mining operation will extract its mineral resources from start to closure, including schedules, production rates, capital and operating costs, recovery methods, and waste or closure activities. It matters to investors because it translates geological estimates into a multi-year forecast of production and costs—like a building blueprint that shows how long a mine will operate and what cash flows, capital needs, and risks to expect over its lifetime.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What NI 43-101 reports did CMCL file?

Caledonia filed technical reports supporting the maiden mineral resource estimates for Motapa and the updated mineral resource estimates for Blanket Mine.

Did CMCL’s technical reports change its August 28, 2026 mineral resource information?

Caledonia said filing the reports does not result in material changes to the scientific or technical information in its August 28, 2026 announcements.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 6-K: How Foreign Companies Report to the SEC →

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Available on EDGAR 10/13/2026 - 06:02 AM EDT Accepted by SEC EDGAR 10/13/2026 - 06:00 AM EDT Learn about SEC filing dates

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16
Of the Securities Exchange Act of 1934

For the month of October 2026

Commission File Number: 001-38164

CALEDONIA MINING CORPORATION PLC

(Translation of registrant's name into English)

2 Mulcaster Street
St Helier
Jersey JE2 3NJ
(Address of principal executive office)

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

Form 20-F ☒      Form 40-F ☐

SIGNATURES

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

	CALEDONIA MINING CORPORATION PLC
	Registrant
October 13, 2026	/s/ JOHN MARK LEARMONTH
	John Mark Learmonth
	CEO and Director

2

EXHIBIT INDEX

Exhibit Number	Description
99.1	Press Release dated October 13, 2026

3

Exhibit 99.1

Caledonia Mining Corporation Plc

Caledonia Files NI 43-101 Technical Reports on SEDAR+ Supporting August 28, 2026 Mineral Resource Announcements

(NYSE AMERICAN, AIM and VFEX: CMCL)

St Helier, October 13, 2026 - Caledonia Mining Corporation Plc (“Caledonia” or the “Company”) announces that, further to its announcements on August 28, 2026 regarding the maiden mineral resource estimates at Motapa and the updated mineral resource estimates for Blanket Mine, it has now filed the related National Instrument 43-101 (“NI 43-101”) technical reports on SEDAR+.

The mineral resource reports are available for review under the Company’s profile on SEDAR+ at https://www.sedarplus.ca. The filing of the mineral resource reports does not result in any material changes to the scientific or technical information contained in the August 28, 2026 announcements.

The life of mine plan for Blanket Mine is in development, the finalisation of which is expected to result in an updated mineral reserve estimate before the end of this year.

Enquiries

Caledonia Mining Corporation Plc Mark Learmonth Camilla Horsfall	Tel: +44 1534 679 800 Tel: +44 7817 841 793
Cavendish Capital Markets Limited (Nomad and Broker) Adrian Hadden Pearl Kellie	Tel: +44 207 397 1965
Camarco, Financial PR (UK) Elfie Harkell Fergus Young	Tel: +44 20 3757 4980
Curate Public Relations (Zimbabwe) Debra Tatenda	Tel: +263 77802131
IH Securities (Private) Limited (VFEX Sponsor - Zimbabwe) Lloyd Mlotshwa	Tel: +263 (242) 745 119/33/39

Head and Registered Office: Caledonia Mining Corporation Plc

2 Mulcaster Street, St Helier, Jersey, Channel Islands, JE2 3NJ

info@caledoniamining.com | | www.caledoniamining.com

Filing Exhibits & Attachments

1 document

Press Releases

• EX-99.1 PRESS RELEASE 7.4 KB