Additional Funding to Secure Growth

Aterian plc (LSE: ATN), the critical mineral exploration and development company, is pleased to announce it has successfully secured US$325,000 of mezzanine funding to support general operations and expand trading activities in the Republic of Rwanda ("Rwanda"), with a focus on the acquisition and sale of tantalum-niobium ("Coltan") concentrate.

The funding is being advanced alongside the Company's partnership with a leading metals and minerals trading house with a global presence. This collaboration enables the Company to scale rapidly and position itself as a significant supplier of responsibly sourced Central African minerals.

To complement this funding, Aterian has issued 1.043 million warrants to the mezzanine funding investors following the expiry of 0.50 million outstanding warrants, providing investors the opportunity to participate in the Company's growth trajectory. The newly issued warrants have a 40 pence exercise price and expire 30 December 2027.

Chairman's Statement - Building Momentum

Charles Bray, Executive Chairman of Aterian, commented:

"This funding marks yet another a very exciting milestone for Aterian and our trading business. Not only does it strengthen our working capital, but it also unlocks the ability to accelerate growth and broaden our reach to a network of world-class downstream buyers.

We are now entering a new chapter where Aterian is not only an exploration company but also an active and growing trading business. Our rigorous focus on traceability, ESG compliance, and supply chain integrity provides us with a strong competitive edge. This is the beginning of what I believe will be a transformative period for the Company, and I look forward to updating shareholders as we build further momentum across our portfolio."

Key Terms of the Loan

• Principal Amount: US$325,000
• Interest & Fees: 20.0% interest and 2% trading fees
• Term: Initial six months, extendable thereafter by mutual agreement
• Guarantee: Aterian plc guarantees the performance of Eastinco Ltd under the facility

Responsible Sourcing & ESG

All mineral supplies handled by Aterian comply with International Tin Supply Chain Initiative (ITSCI) standards and the OECD Due Diligence Guidance. The Company has implemented rigorous onboarding and audit procedures, including on-site inspections, mine-origin verification, and conflict-free certification. These measures underpin Aterian's position as a reliable and transparent partner for international buyers increasingly focused on ESG-aligned procurement.

Strategic Outlook

This development represents a yet another step forward in Aterian's strategy to create a vertically integrated exploration and trading platform across Africa, focused on responsibly sourced critical minerals. With the secured mezzanine funding and its partnership, Aterian is well positioned to deliver on its growth ambitions while creating long-term value for shareholders.

Further updates on trading performance and supply expansion will follow in due course.

Aterian Plc:

Charles Bray, Executive Chairman - charles.bray@aterianplc.com

Simon Rollason, Director - simon.rollason@aterianplc.com

Financial Adviser and Joint Broker:

Novum Securities Limited

David Coffman

Colin Rowbury

Joint Broker:

SP Angel Corporate Finance LLP

Ewan Leggat / Adam Cowl

Financial PR:

Bald Voodoo - ben@baldvoodoo.com

Ben Kilbey

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