Ann: VHD Graphite Samples Requested & First Heat Sink Produced, page-4

ASX Announcement

15 April 2025

VHD Graphite Commercialisation Advances with Customer

Sample Requested and First Heat Sink Produced

Customer sample testing initiated – with an experienced companyi that has expertise in

the design and supply of heat sinks to the high-performance electronics and electrical

systems sector progressing to Stage 2 of the qualification process.

First VHD Graphite heat sink machined confirming real-world form factor and production

viability.

VHD Graphite identified as a solution to aluminium heat sink performance limitations.

Engagement with additional prospective customers continues to advance, with GCM

targeting Q2 2025 for additional customers progressing to Stage 2 of the qualification

process. GCM remains confident that its current engagement activities, including in the

data centre sector, will result in collaboration partnerships for the potential production of

heat sinks and cold plates.

North American warehousing and logistics hub planning underway to support future

supply chain operations and expansion to North American manufacturing.

Recent results confirmed the commercial scalability of VHD Technology, positioning it as a

leading material for next-generation cooling solutions in AI computing, data centres,

aerospace, and energy storage, ultimately defining a clear path to market.

As AI computing, data centres, and high-performance electronics demand better heat

management, traditional materials like copper and aluminium are facing limitations. VHD

Graphite is not only demonstrating the ability to replace these materials but also

significantly outperform them, with results showing the potential to offer a lighter, more

efficient and cost-effective alternative for next generation cooling solutions.

Green Critical Minerals Ltd (‘GCM’ or ‘the Company’ is pleased to announce two major

milestones in the commercialisation of its proprietary Very High Density (VHD) Graphite

Technology:

1.Successful machining of the first VHD Graphite heat sink, validating product form and

manufacturability; and

2.Customer request for application-specific sample testing, marking entry into the second

stage of GCM’s structured customer qualification process.

www.gcminerals.com.au [email protected]

Registered Office – 349 Hay Street SUBIACO WA 6008 ABN 12 118