Rockfire Resources Regulatory News (ROCK)

18 May 2026

Rockfire Resources plc

("Rockfire" or the "Company")

Molaoi Drilling Update

Rockfire Resources plc (LON: ROCK), the base metal, critical mineral and precious metal exploration company, provides the market with a drilling update from Rockfire's 100%-owned Molaoi zinc deposit in Greece.

Highlights

· Results from drill hole HMO-015 have been received from the laboratory, with highlights below.

o  0.82m @ 8.7% Zn, 28.5g/t Ag, and 27.4g/t Ge from 350m downhole depth

o  11.9m @ 8.8% Zn, 49.0g/t Ag and 25.2g/t Ge from 354.90m downhole depth

o  3.02m @ 7.5% Zn, 40.9g/t Ag, 19.0g/t Ge and 1.3% Pb from 386.28m downhole depth

*** Please note that quoted widths are downhole widths ***

· Diamond drilling to upgrade the Inferred Resource to Indicated Resource status continues with hole HMO-017 currently in progress.

· Portable XRF ("pXRF") readings being recorded in hole HMO-017 are encouraging, with individual, spot zinc values up to 51% Zn, 72g/t Ag, 0.38% Cu and 5.1% Pb being recorded over narrow intervals at a depth of approximately 288m from surface. The pXRF does not measure germanium.

· Results of core samples from hole HMO-016 are awaited from the laboratory.

The cleanliness of the pXRF machine is established by measuring a BLANK reference material (a translucent quartz crystal) at the beginning of each day. A Certified Reference Material ("CRM") specific to volcanic-hosted massive sulphide Zn-Pb-Cu-Ag-Au ore (ORES 620) is measured for accuracy/precision of the pXRF machine with a reading taken at the beginning of each day.

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Map showing the location of drill holes at Molaoi

David Price, Chief Executive Officer of Rockfire, commented:

"Hole HMO-015 is drilled within the main zone of mineralisation at Molaoi, which extends for more than 1,300m north-south. Similar, previous, strong intervals within 65m of hole HMO-015 include:

HMO-004 - 8.8m @ 8.8% Zn, 49.0g/t Ag, 16.0g/t Ge from 258.4m depth (Rockfire hole)

AN007 - 12.3m @ 4.8% Zn, 20.0g/t Ag, 1.13% Pb from 120.1m depth (historical hole)

AN004 - 4.0m @ 8.5% Zn, 36g/t Ag, 1.85% Pb from 134.3m depth (historical hole)

HMO-003 - 3.6m @ 6.0% Zn, 32.5g/t Ag, 1.1g/t Pb, 17.4g/t Ge from 202.5m depth (Rockfire hole)

B035 - 3.0m @ 7.0% Zn, 39.5g/t Ag and 2.88% Pb from 255.3m depth (historical hole)

AN006 - 3.7m @ 14.3% Zn, 52.0g/t Ag, 1.4% Pb from 99.50m depth (historical hole)"

*** Please note that quoted widths are downhole widths ***

"As shown in the above examples, there is considerable variation of both grade and width of the mineralised lodes. This variation is expected in mineral deposits, however the critical characteristic of Molaoi to remember is that every hole in the main lode has intersected zinc, silver, germanium and lead. The mineralisation continues to be robust and predictable."

"I take this opportunity to highlight that local community support for the project remains strong and the government in Athens is also strongly supportive of Rockfire and the drilling activities being undertaken. Our use of above-ground tanks instead of digging in-ground sumps where possible is appreciated by the landowners. Rockfire is proud of its track record of not having destroyed any olive trees, despite drilling between rows of old-growth trees."

"The market will continue to be informed and updated as new information and results come to hand."

For further information on the Company, please visit www.rockfireresources.com or contact the following:

Qualified Person Statement

The technical information in this announcement is based on information compiled by Mr David Price, the Chief Executive Officer of Rockfire Resources plc, who is a Fellow of the Australasian Institute of Mining and Metallurgy (F.AusIMM). Mr Price has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which has been undertaken to qualify as a "Qualified Person" in accordance with the AIM Rules Guidance Note for Mining and Oil & Gas Companies. Mr Price consents to the inclusion in the announcement of the matters based on their information in the form and context in which it appears.

Glossary

Notes to Editors

Rockfire Resources plc (LON: ROCK) is a gold, base metal and critical mineral exploration company, with a high-grade zinc/lead/silver/germanium deposit in Greece and a portfolio of gold/copper/silver projects in Queensland Australia.

· The Molaoi deposit in Greece has a JORC Inferred Mineral Resource of 15.0 million tonnes @ 7.26% Zn, 1.75% Pb and 39.50g/t Ag, for 1.5 million tonnes of ZnEq. metal. This resource uses a 4% low-grade cut, and equates to 1.09 million tonnes of zinc, 260,000 tonnes of lead and 19.1 million ounces of silver. Molaoi is also reported under the UNFC Code with classification E2, F2.1, G3 for Zn, Ag, and Pb, and E3.2, F3.1, G4.1 for Ge.

· The Plateau deposit in Queensland has a JORC Inferred Resource of 131,000 ounces of gold and 800,000 ounces of silver, using a 0.5g/t Au cut off. 53,000 of these ounces lie within the top 100m from surface. Plateau is subject to a farm-in by ASX-listed Sunshine Metals Ltd (ASX:SHN).

· The Marengo prospect in Queensland hosts high-grade gold, silver and copper within an historic goldfield, which is entirely under licence by Rockfire. Marengo is subject to a farm-in by ASX-listed Eastern Resources Ltd (ASX:EFE).