Quantum Helium: Major Sagebrush-1 Stimulation Programme Commences

09 November 2026

Quantum Helium Limited

("Quantum" or the "Company")

Quantum Helium Limited (AIM: QHE; OTC: QHELF) is pleased to announce that operations have now commenced for its major fracture stimulation programme at the Sagebrush-1 well in Colorado, USA, where the Company holds a 90% working interest.

Following the mobilisation update announced on 5 November 2026, specialist contractors, equipment and personnel have been deployed to site, with the Company progressing the planned stimulation and associated well operations.

The programme represents a significant operational milestone for Quantum, following several months of detailed technical evaluation, engineering design and preparation.

Operational Update

The larger-scale stimulation programme has been designed to improve connectivity within the helium-bearing Leadville Formation, with the objective of achieving stronger, more sustainable gas flow rates and advancing the assessment of Sagebrush-1's commercial production potential.

The planned treatment incorporates a nitrogen-assisted gelled foam system and proppant, designed to create and maintain conductive pathways within the reservoir and support subsequent well clean-up and flow testing.

Sagebrush-1 has previously demonstrated helium concentrations of approximately 2.5% during earlier testing, with historical drill stem testing recording 2.76% helium.

The Company will provide further operational updates as appropriate.

Figures 1 & 2: Contractors, equipment and personnel on site

Howard McLaughlin, Chief Executive Officer of Quantum Helium, commented: "We are extremely excited to have commenced this important programme at Sagebrush-1. Following months of extensive technical work, detailed engineering and preparation, it is tremendously encouraging to see operations now underway on site.

"This represents a major step forward for Quantum. We have demonstrated the presence of helium within the Leadville Formation, and our focus is now firmly on unlocking stronger, more sustainable flow rates through this carefully designed stimulation programme.

"With helium recently designated a critical material by the US Government, and the increasing importance of securing domestic supply, the timing of this programme is particularly exciting.

"Our team is fully focused on delivering this important phase of operations, and we look forward to updating shareholders as the programme progresses."

Enquiries:

Updates on the Company's activities are regularly posted on its website: www.quantum-helium.com

Notes to editors

Quantum (AIM: QHE) is a helium and hydrocarbon exploration, development, and production company with projects in the US. Quantum’s strategic objectives remain consistent: to identify opportunities which will provide operating cash flow and have development upside, in conjunction with progressing exploration. The Company has several projects in the US, in addition to royalty interests in Australia.

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