Marimaca Copper Secures A$80M Placement to Advance Chilean Copper Development

• Marimaca Copper successfully raised A$80 million through an oversubscribed institutional placement, demonstrating strong investor confidence and providing adequate funding for development and exploration activities.
• The placement proceeds will fund detailed design and engineering work at the Marimaca Oxide Deposit while supporting exploration at the Pampa Medina Project and Marimaca sulphide target, offering multiple value creation pathways.
• The company is progressing the flagship Marimaca Copper Project through a Definitive Feasibility Study led by experienced engineering firm Ausenco Chile, representing advancement toward production decisions.
• Marimaca's asset portfolio is strategically located in Chile's established Antofagasta Region, providing access to existing mining infrastructure and a stable regulatory environment for copper development.
• The successful placement included both new institutional investors and existing shareholders, broadening the shareholder base while improving expected ASX liquidity for enhanced trading dynamics.

Marimaca Copper Corp. (TSX: MARI, ASX: MC2) has successfully completed a significant capital raising exercise, securing A$80 million in funding through an institutional placement that demonstrates strong investor confidence in the company's copper development strategy. As a copper exploration and development company focused on its 100%-owned flagship Marimaca Copper Project and surrounding exploration properties located in Antofagasta Region, Chile, the company is positioned to capitalize on the growing global demand for copper driven by electrification and renewable energy infrastructure development.

The timing of this capital raising is particularly significant given the current copper market dynamics and the company's progression through key development milestones. With copper prices remaining elevated due to supply constraints and increasing demand from the energy transition, Marimaca's Chilean assets present compelling investment opportunities for institutions seeking exposure to this critical commodity.

Placement Details & Structure

"The company has secured binding commitments for a brokered placement in Australia and select other jurisdictions, excluding Canada, of 8,247,423 new Chess Depositary Interests ("CDI") of the Company at a price of A$9.70 per CDI for gross proceeds of approximately A$80,000,000 or approximately C$72,080,000 (the "Placement")."

The placement structure reflects a strategic approach to capital raising, targeting Australian and international institutional investors while maintaining compliance with various regulatory frameworks. The pricing at A$9.70 per CDI represents a significant capital commitment from institutional investors and provides the company with substantial funding to advance its development objectives.

The placement utilized the ASX Listing Rule 7.1 waiver previously granted to Marimaca, enabling the company to issue securities without requiring shareholder approval. This mechanism provides operational flexibility and allows the company to respond quickly to market opportunities and funding requirements. Completion is expected on or about September 11th, 2025, subject to regulatory approvals including Toronto Stock Exchange approval, reflecting the dual-listed nature of the company's securities.

Investor Demand & Market Reception

The market reception of the placement demonstrates significant institutional confidence in Marimaca's strategy and asset portfolio. The company reported:

"The Placement was strongly supported by both new institutional and sophisticated investors and existing shareholders, with demand for the Placement significantly exceeding the targeted quantum."

This oversubscription indicates that institutional investors view Marimaca's copper assets as attractive investment opportunities in the current market environment. The participation of both new and existing shareholders suggests that current investors remain confident in the company's strategy while new institutional capital provides validation of the investment thesis from fresh perspectives.

The company expressed satisfaction with the broadening of its shareholder base, noting that it is pleased to welcome new institutional shareholders to its register and looks forward to the increased ASX liquidity expected to result from the Placement. Enhanced liquidity on the ASX should benefit all shareholders by improving trading dynamics and potentially reducing bid-ask spreads, making the shares more attractive to institutional investors who require sufficient liquidity for position management.

Use of Proceeds & Strategic Focus

The allocation of placement proceeds reflects a balanced approach between near-term development activities and longer-term exploration opportunities. According to the company:

"Net proceeds from the Placement will be used for exploration at the Pampa Medina Project and Marimaca sulphide target, detailed design and engineering and project related workstreams at the Marimaca Oxide Deposit (the "MOD"), and for general corporate purposes."

This allocation strategy addresses multiple value creation pathways simultaneously. The focus on detailed design and engineering for the Marimaca Oxide Deposit represents advancement toward production decisions, while exploration activities at Pampa Medina and the Marimaca sulphide target offer potential for resource expansion and new discoveries.

The Pampa Medina Project represents a significant exploration opportunity within Marimaca's portfolio, offering potential for resource expansion beyond the current oxide deposit. Exploration activities funded by the placement proceeds could identify additional copper mineralization, potentially extending the life-of-mine and improving project economics.

Similarly, the Marimaca sulphide target presents opportunities for identifying higher-grade copper mineralization that could complement the existing oxide resource. Sulphide deposits often contain higher copper grades than oxide deposits, potentially offering improved project returns if successfully developed.

Project Portfolio & Development Pipeline

Marimaca's asset portfolio centers on the Marimaca Copper Project, which hosts the Marimaca Oxide Deposit (the "MOD"), an IOCG-type copper deposit. The Company is currently progressing the Marimaca Copper Project through the Definitive Feasibility Study led by Ausenco Chile Ltda.

The IOCG (Iron Oxide Copper Gold) deposit type represents a well-understood geological model with numerous analogues in the Chilean copper industry. This geological setting often hosts significant copper resources and has proven amenable to various extraction methods, providing technical de-risking for the development process.

The engagement of Ausenco Chile Ltda for the Definitive Feasibility Study represents selection of an experienced engineering firm with significant expertise in Chilean copper project development. Ausenco's track record in the region provides confidence in the quality and reliability of the feasibility study outcomes, which will be critical for investment decisions and project financing.

Beyond the core Marimaca project, the company maintains an extensive exploration portfolio in the highly prospective Antofagasta Region. The company's land package includes "the >15,000ha wholly-owned Sierra de Medina property block, located 25km from the MOD." This proximity enables potential operational synergies and shared infrastructure development, potentially improving project economics through economies of scale.

Market Positioning & Regulatory Framework

The placement structure demonstrates Marimaca's strategic approach to capital markets access across multiple jurisdictions. The involvement of Macquarie Capital (Australia) Limited, Euroz Hartleys Limited, and Beacon Securities Limited as joint lead managers, with Canaccord Genuity (Australia) Limited as co-manager, reflects engagement with established institutional networks across Australian and Canadian capital markets.

This multi-jurisdictional approach provides access to diverse investor bases and enables the company to optimize funding costs and terms. The Australian focus of the placement aligns with ASX-listed resources companies' typical investor base while maintaining Toronto Stock Exchange listing benefits for North American investors.

The regulatory framework governing the placement includes compliance with both Australian and Canadian securities regulations, reflecting the company's dual-listing structure. The exclusion of Canada from the placement jurisdictions demonstrates careful regulatory compliance while the inclusion of "select other jurisdictions" suggests potential for international institutional participation.

Chile's mining-friendly regulatory environment provides a stable operating framework for copper development projects. The Antofagasta Region specifically has a long history of successful copper mining operations, providing established infrastructure and regulatory precedents that reduce development risks compared to frontier mining jurisdictions.

Development Timeline & Execution Risk

The progression through the Definitive Feasibility Study represents a critical milestone in the project development pathway. Completion of this study will provide detailed capital cost estimates, operating cost projections, and production profiles that form the basis for development financing decisions.

The funding secured through the placement provides financial flexibility to complete engineering and design work without immediate pressure for additional capital raising. This reduces execution risk and enables management to focus on technical optimization rather than funding concerns during critical development phases.

The parallel exploration programs funded by the placement proceeds offer potential for resource expansion and improved project economics. Successful exploration could extend mine life, increase production capacity, or identify higher-grade ore zones that enhance project returns.

For Investors

The successful completion of Marimaca's A$80 million placement represents a significant milestone for investors seeking exposure to copper development opportunities in Chile. The oversubscribed nature of the placement demonstrates institutional confidence in the company's strategy and asset quality, while the funds raised provide adequate capital to advance key development and exploration objectives.

For investors considering Marimaca, the placement provides several positive indicators: strong institutional support, adequate funding for near-term objectives, and a clear development pathway through the Definitive Feasibility Study process. The company's focus on the Antofagasta Region leverages established mining infrastructure and regulatory frameworks, reducing country and development risks compared to frontier copper projects.

The combination of near-term development potential at the Marimaca Oxide Deposit and longer-term exploration opportunities across the broader project portfolio offers multiple value creation pathways. The engagement of experienced engineering and advisory firms provides additional confidence in execution capabilities.

However, investors should remain cognizant of typical mining development risks including commodity price volatility, regulatory changes, and technical challenges that could impact project development timelines and economics. The company's progression through the feasibility study process and ongoing exploration results will provide critical information for ongoing investment evaluation.