Quantum Helium Limited · LSE:QHE
Quantum Helium — Mosman Oil & Gas — Investor Presentation (September 2025)
35 slides from Quantum Helium's investor presentation, September 2025
Slide 1: Sagebrush & Coyote Wash Projects
Sagebrush & Coyote Wash Projects World-class helium development and oil exploration AIM:MSMN MOSMAN - 2025 1
Slide 2: Agenda
AGENDA 01 02 03 Introduction & Overview Sagebrush & Coyote Wash Coyote Wash 04 05 06 Timeline Australian Assets Experienced team
Slide 3: Disclaimer
Disclaimer This presentation has been prepared for general information purposes only and has not been approved by an The Presentation is confidential and shall not be copied, published, reproduced or distributed in whole or in authorised person within the meaning of the Financial Services and Market
Slide 4: Introduction & Overview
01 Introduction & Overview
Slide 5: Mosman opportunity overview
Mosman opportunity overview Energy in motion (AIM:MSMN) Market capitalisation (£m) Mosman Oil & Gas Limited Compelling undervalued helium opportunity 60 o Liquid AIM stock focused on helium o Proven high % helium areas in US o Helium is 100x more valuable than 50 and Australia hydrocarbon gas o OECD
Slide 6: Investment case
Investment case Advancing helium, hydrogen and hydrocarbon projects Dual commodity upside Independent validation Near-term catalysts Growth projects Proven helium (2.76% He at Sproule ERCE audit confirms High-Res 3D seismic. 100% WI at Coyote Wash Sagebrush-1) alongside established P50 ~134 MMscf He
Slide 7: Increasing helium price
Increasing helium price A rare and irreplaceable resource Helium now between $300 and $500 per MCF depending on the region and purity Analytical, Engineering, Lab, Science & Specialty Gases Controlled Atmospheres, Fiber Optics, and Semiconductors Magnetic Resonance Imaging (MRI) Lifting Gas Aerospac
Slide 8: Sagebrush & Coyote Wash
02 Sagebrush & Coyote Wash
Slide 9: Sagebrush & Coyote Wash projects
Sagebrush & Coyote Wash projects Helium Play System, Colorado Sagebrush Coyote Wash o Area: 2560 acres in South and 7440 acres in o Area: 4320 acres selected from entire North – held by production survey o Seismic coverage: Currently 2D, 3D seismic o Working interest: 100% being acquired this year o
Slide 10: Sagebrush – development plans
Sagebrush – development plans Goals: Progress the Sagebrush-1 helium discovery to early production 1. Identify 2. Validate 3. Reduce risk 4. Develop Completed 3rd party Acquiring 16 square mile Planned extended flow test Progress development plan resource audit (Sproule) for high resolution 3D surve
Slide 11: Sagebrush-1 helium discovery
Sagebrush-1 helium discovery Sagebrush Leadville depth map o Large, robust Leadville structure o Proven helium accumulation o Excellent reservoir quality o Adjacent undrilled structure 720 Acres Sagebrush-1 300,000 bbls New Well Top Ismay oil Top Leadville carbonates MOSMAN - 2025 11
Slide 12: Sagebrush well history and gas analysis
Sagebrush Well history Gas analysis o Drilled in 1993 to test Leadville/Ismay Formations o TD 7467’ in Ouray (cased below base of Leadville) o DST 7235 – 7285’ in Leadville Fm, after producing non- flammable gas to surface, the well was plugged back to the Lower Ismay oil zone o Ismay algal mound pr
Slide 13: Sagebrush project
Sagebrush project Helium Play System, Colorado Sagebrush South Sagebrush North o Area: 2560 acres o Area: 7440 acres o Seismic coverage: 2D o Seismic coverage: 2D o Targets: oil encountered at o Targets: Ismay Fm (post salt) - Sagebrush-1 in algal mounds in analogous to Roadrunner and the Ismay Fm (
Slide 14: Sagebrush-1 resource potential
Sagebrush-1 resource potential Sproule analysis "The Leadville Formation has become a premier helium target in Summary of Raw Gas Resource Volumes (MMscf) North America, with recent discoveries demonstrating exceptional helium concentrations that far exceed typical commercial Sproule ERCE 1U 2U 3U t
Slide 15: Sagebrush oil production and seismic acquisition
Sagebrush oil production and seismic acquisition Highlights o 15,000-17,000 Bbl oil produced annually since 2017 from seven wells o Reprocessing of 2D seismic over entire Sagebrush Project area o 3D to image Sagebrush discovery well and identified leads o Midstream and upstream infrastructure availa
Slide 16: Sagebrush project 3D seismic survey
Sagebrush project Helium Play System, Colorado Goals of the survey o Better definition of the Leadville closure beneath Sagebrush-1, including fluid analysis o Resolution of additional algal mound leads near both Sagebrush and Mariano Wash (within Coyote Wash) o Development drilling locations for fu
Slide 17: Sagebrush dual well test
Sagebrush Dual well test o An extra string of casing is set before entering the salt o A larger starting hole to Surface accommodate extra casing o Potential for dual completion, oil in Ismay & helium in Leadville 6000’ o More expensive but has two target zones 8500’ Single Zone well test o Only one
Slide 18: Helium separation schematic
Sagebrush-1 Helium separation schematic Hg CO2 H2O Dehydration LNG Raw gas Natural Gas Power CO2 Removal Mercury input Liquefaction Generation Removal C3 + Membrane Cryogenic Off Gas separation distillation Pre-treatment phase Nitrogen Rejection Unit High-pressure He He He Crude gas trucked Helium H
Slide 19: Helium transportation option
Helium transportation option o 15,000-17,000 Bbl oil produced annually since 2017 from seven wells o Reprocessing of 2D seismic over entire Sagebrush Project area o 3D to image Sagebrush discovery well and identified leads o Midstream and upstream infrastructure available for helium & natural gas o
Slide 20: Coyote Wash
03 Coyote Wash
Slide 21: Coyote Wash Project
Coyote Wash Project Highlights Helium Play System, Colorado o Project area: 4320 acres o Working interest: acquired in December 2024 o Seismic coverage: 3D seismic coverage over entire project area o History: Coyote Wash 30-12 drilled by Wintershall, 1984, tested non-flammable gas, estimated to be ~
Slide 22: Coyote Wash drill-ready helium prospects
Coyote Wash Drill-ready helium prospects o 3 - year exploration term o 7 - year development term o 100% working interest o Reprocessed 3D o Ismay oil potential o Expandable to Sagebrush MOSMAN - 2025 22
Slide 23: Coyote Wash reservoir targets
Coyote Wash Reservoir targets Reservoir targets o Lower Leadville dolomites Oil o Mid Leadville limestones & dolomites Helium o McCracken Fm sandstone o Ismay Fm, algal mounds (oil) o Helium source: Proterozoic basement granites o Seal: Anhydrites, salt, tight limestone and shale o Traps: Structural
Slide 24: Mariano Wash 1-1 oil well (2005)
Mariano Wash 1-1 oil well (2005) Algal Mound near miss? Coyote Wash is believed to be an extension Mariano 1-1; Comp’d 2005 to the producing Mariano Wash oil field IP: 40 BOPD; 1200 MCD (off-mound) Cum Prod: ~20 MBO, 5-8% Porosity MOSMAN - 2025 24
Slide 25: Mariano Well drilling
Mariano Well drilling Mariano Well now interpreted as drilled off structure on the mound Mariano 1-1 X-Line 44 – Flattened on Top of Salt 5-8% Porosity Ismay Salt MOSMAN - 2025 25
Slide 26: Timeline
04 Timeline
Slide 27: Project timeline
Project timeline Extended flow test Q425 and drilling 2026 2025 2026 / 2027 Sproule Resource Appraisal drilling Sagebrush Extended flow test Front-end engineering Helium production determination Surface Plant Construction Completed Planning IMDA granted Reprocess & IMDA Coyote Wash Plan drilling Dri
Slide 28: Australian assets
05 Australian assets
Slide 29: Australia – Assets and Infrastructure
Australia – Assets and Infrastructure EP 145 EPA 155 o Mosman holds a 5% royalty o Mt Winters well tested on production hydrocarbons o Prospective base case o Mosman holds a 2.5% royalty resources of 440Bcf total on production gas, 26.4Bcf helium o Prospective resources of (independently verified, 1
Slide 30: Experienced team
06 Experienced team
Slide 31: Mosman helium team
Mosman helium team Howard McLaughlin Dave Braman Formally VP of Global Exploration with BHP, involved in Exploration Geophysicist with a demonstrated history of oil and gas success in onshore US basins and the GOM. Broad projects in a diverse range of countries and operations. experience with 2D and
Slide 32: Mosman Board
Mosman Board Carl Dumbrell Andrew Scott Nigel Harvey Graham Duncan Chairman Non-Executive Director Non-Executive Director Non Executive Director o A partner in a Sydney accounting o Extensive advisory experience with o Decades of Asia-Pacific investment o UK-based Chartered Accountant firm with 20 y
Slide 33: Top shareholders
Top 20 shareholders Number of shares in issue: 22,648,454,776 (15 Sep 2025) Name Units % 1 Hargreaves Lansdown (Nominees) Limited (15942) 2,977,419,768 13.15 13.15% 2 Barclays Direct Investing Nominees Limited (CLIENT1) 1,991,428,803 8.79 3 Interactive Investor Services Nominees Limited (SMKTNOMS) 1
Slide 34: Summary
Summary o The Sagebrush-1 helium discovery is an advanced project ready for testing and development o Having a drilled and cased wellbore on the Sagebrush field saves millions in drilling dollars and years in development time o Helium resource confirmed by Sproule o 3D seismic Acquisition – October
Slide 35: Sagebrush & Coyote Wash Projects
www.mosmanoilandgas.com Sagebrush & Coyote Wash Projects World-class helium development and oil exploration
Mosman Oil & Gas — Investor Presentation (September 2025) on 6ix