09 March 2026, 07:00 UTC

Arc Minerals Ltd

('Arc' or the 'Company')

Commencement of Geophysical Work Programme in Botswana

Arc Minerals (LSE: ARCM), an exploration company focused on discovering and developing Tier 1 copper deposits, is pleased to announce the commencement of a ground-based magnetic survey and an Induced Polarisation ('IP') survey over its PL135/2017 licence at the Virgo Project, located within the highly prospective Central Structural Corridor of the Kalahari Copper Belt ('KCB') in the Republic of Botswana.

Highlights

·    Magnetic and IP surveys are designed to define the contact between the D'kar and Ngwako Pan formations ('DKF-NPF')

·    Field camp preparation commenced and teams mobilised to carry out these surveys

·    295 line kilometers ('km') of ground-based magnetic surveying to start this week

·    52.5km of IP surveying to follow immediatetly thereafter

·    Data acquisiton and interpretation expected to be completed by the end of Q2

Remy Welschinger, Chief Executive Officer of Arc, commented:

"This programme represents an important step in unlocking the potential of our Virgo license. We look forward to completing this exciting work programme, with the ultimate objective of defining up to 15 kilometres of prospective DKF-NPF contact within the licence. This contact acts as the key exploration target in this part of the Kalahari CopperBelt and the host zone for many of the defined copper resources in the area."

Geophysical Survey Background

The programme builds directly on the successful limited IP survey conducted over part of the PL135/2017 license in 2024, where the contact between the DKF-NPF formations were accurately identified and verified by the survey, before focused drilling commenced. The Company has decided to extend the IP survey to cover the full length of the hypothesized contact zone in its license area, and will be further complemented by a ground-based magnetic survey over the same length.

All the known copper deposits and occurrences in the KCB occur at, or immediately above the DKF-NPF contact, particularly where structural domes create favourable settings for copper and silver mineralisation.

The Company has contracted a Botswana-based geophysical company to carry out the surveys. A field camp has been established and will cater for over 50 people at peak activity, with the magnetic survey commencing this week.

The planned ground-based magnetic survey consists of 295 line kms at a 50 metre ('m') line spacing, with readings taken every 5m (Figure 1). The magnetic survey will provide additional granularity around the structures coming into and around the dome and along the limbs, significantly refining the Company's geological model and overall understanding.

Figure 1. Planned ground-based magnetic survey over the assumed extension of the DKF-NPF Contact

The ground-based Gradient Array IP survey over the contact zone and its extents (Figure 2) will assist in accurately identifying the location of the DKF-NPF contact and provide an efficient, cost-effective and high-resolution map of the sub-surface chargeability and resisitivity, discriminating between types of conductive structures and providing targets for drilling.

A total of 52.5 line km are planned to be surveyed, comprising 42.5km of Gradient IP and 10km of insight Section IP. The survey employs a pole-dipole array with 25m electrode spacing.

Figure 2. Proposed Induced Polarisation survey over assumed extension of the DKF-NPF Contact

For further information contact:

For more information, visit www.arcminerals.com

Forward-looking Statements

This news release contains forward-looking statements that are based on the Company's current expectations and estimates. Forward-looking statements are frequently characterised by words such as "plan", "expect", "project", "intend", "believe", "anticipate", "estimate", "suggest", "indicate" and other similar words or statements that certain events or conditions "may" or "will" occur. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause actual events or results to differ materially from estimated or anticipated events or results implied or expressed in such forward-looking statements. Such factors include, among others: the actual results of current exploration activities; conclusions of economic evaluations; changes in project parameters as plans continue to be refined; possible variations in ore grade or recovery rates; accidents, labour disputes and other risks of the mining industry; delays in obtaining governmental approvals or financing; and fluctuations in metal prices. There may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein.

**ENDS**