Green360 Technologies Finalizes First Commercial Supply Deal with Holcim for Low-Carbon Cement Alternative

Holcim Partnership Confirms Commercial Viability of G360's MKX Technology at Scale

The binding supply agreement with Holcim represents a major milestone for Green360 Technologies, formalizing a commercial relationship initially announced via a Memorandum of Understanding. Holcim, a subsidiary of the global Holcim Group with 2025 net sales of CHF 15.7 billion and presence in 45 markets, is among the world’s largest building materials companies. In Australia, Holcim operates a broad network supplying concrete, aggregates, and related products to significant infrastructure projects and is a recognized leader in advancing lower-carbon construction through its ECOPact concrete range.

This agreement establishes Holcim as G360's first commercial customer for MKX, providing third-party validation of the product’s quality and G360’s capability to supply at commercial volumes. MKX-CC is engineered to replace fly ash and slag, two supplementary cementitious materials facing imminent supply constraints in Australia. The fixed-price contract with standard termination provisions reflects Holcim’s confidence in product performance and G360’s supply chain execution after rigorous technical assessments by a leading industry operator.

Rapid Shift from Development to Commercial Production Within Four Months

G360 has achieved an accelerated commercialisation timeline, advancing from technology development to binding commercial supply in roughly four months. In March 2026, the company signed a binding Toll Treatment Agreement with Calix Limited (ASX:CXL), enabling a capital-efficient route to commercial production by accessing up to 30,000 tonnes per annum of calcination capacity. This partnership removes the need for G360 to build its own calcination infrastructure, leveraging Calix's existing Bacchus Marsh facility in Victoria.

Following this agreement, G360 completed its first commercial production run in April 2026, producing 150 tonnes continuously at Calix’s facility. To date, more than 600 tonnes of MKX have been produced and distributed across Victoria for commercial-scale concrete validation. These supplies have supported infrastructure projects such as Melbourne Airport Business Park, the Eastern Freeway Extension, and the Suburban Rail Loop, demonstrating product efficacy in diverse, real-world applications. The progression from pilot production through commercial validation to a binding agreement with a major global customer highlights G360’s successful execution of a scalable, capital-efficient supply chain strategy for supplementary cementitious materials.

Supply Agreement Details and Delivery to Holcim’s Victorian Plants

Under the binding contract, G360’s wholly owned subsidiary Suvo Minerals Australia Pty Ltd will supply up to 4,800 tonnes annually of MKX-CC to Holcim’s Victorian concrete operations during the initial 12-month term. The agreement sets a fixed price per tonne and includes technical compliance standards to guarantee product consistency and performance. MKX will be produced at Calix Limited’s Bacchus Marsh facility under the existing Toll Treatment Agreement and distributed to five Holcim batching plants across Melbourne, facilitating immediate integration into Holcim’s concrete production and supply chain.

The binding nature of the agreement, with industry-standard termination rights, converts the previously announced MOU into enforceable commercial commitments. The fixed-price structure offers G360 revenue visibility and commercial certainty, while delivery to five existing Holcim plants demonstrates the product’s immediate applicability within established concrete production infrastructure. The initial 4,800-tonne volume represents a significant commercial scale to test G360’s supply chain under operational conditions and generate operational cash flow.

Structural Deficits in Traditional Supplementary Cementitious Materials Fuel Market Demand

This agreement emerges amid fundamental structural shifts in Australia’s concrete industry supply of traditional supplementary cementitious materials. Historically reliant on industrial by-products from coal-fired power generation—specifically fly ash—and blast furnace steelmaking slag, the industry faces contracting supply chains due to decarbonisation and renewable energy growth. Declining coal-fired power capacity reduces fly ash availability, while heavy industry decarbonisation lowers blast furnace slag production.

G360 states this is a lasting structural change rather than a temporary shortage, reshaping how supplementary cementitious materials will be sourced in coming decades. Holcim CEO George Agriogiannis noted, "Widespread use of this new supplement will reduce our reliance on fly ash and slag; two materials that will continue to decline in availability as the renewable energy sector ramps up, and heavy industries continue to decarbonise." This structural supply constraint creates a durable market opportunity for alternatives like MKX-CC that can reliably replace diminishing industrial by-products at scale.

MKX-CC Positioned as a Scalable Solution to Industry Supply Challenges

G360’s leadership positions MKX-CC as a critical solution amid the concrete industry’s evolving supply constraints. The company highlights the approaching supply limitations that will transform sourcing of supplementary cementitious materials in Australia’s building and civil infrastructure sectors. MKX-CC stands out as one of the few dedicated, scalable, locally produced products capable of substituting declining fly ash and slag. Its high-reactivity metakaolin formulation meets concrete industry specifications and quality standards.

Holcim’s commitment to a binding 12-month supply agreement following extensive technical evaluation validates this positioning. The product’s successful application in major infrastructure projects—including Melbourne Airport Business Park, the Eastern Freeway Extension, and the Suburban Rail Loop—demonstrates its performance in demanding real-world conditions. This track record, combined with Holcim’s endorsement, provides a foundation for G360 to pursue further commercial agreements with other major concrete producers and ready-mix suppliers.

Capital-Light Model Enabled by Calix Toll Treatment Partnership

G360’s commercialisation approach leverages a capital-efficient model through its binding Toll Treatment Agreement with Calix Limited, signed in March 2026. This agreement grants access to up to 30,000 tonnes per annum of calcination capacity at Calix’s Bacchus Marsh facility without requiring G360 to invest in dedicated infrastructure. The toll treatment model enables conversion of raw clay into finished MKX product via a third-party facility, with G360 paying per-tonne treatment fees for industrial-scale production capacity.

This capital-light strategy contrasts with traditional vertically integrated models where companies finance and operate their own calcination plants. By utilizing Calix’s existing infrastructure and expertise, G360 transitions from development to commercial supply while maintaining operational flexibility and minimizing fixed assets. The arrangement provides capacity headroom beyond the initial Holcim commitment of 4,800 tonnes, allowing for growth with additional customers without immediate capital expenditure. This positions G360 to scale production and revenues efficiently as new binding agreements are secured.

Building Momentum for Additional Commercial Supply Deals in Undersupplied Market

The Holcim agreement lays the groundwork for G360 to secure further commercial supply contracts as it demonstrates product performance, supply reliability, and commercial viability. The company refers to Holcim as its "inaugural" commercial customer, indicating the deal is a first step toward establishing G360 as a supplier amid structural material shortages. With access to 30,000 tonnes of annual calcination capacity through Calix and the initial 4,800-tonne Holcim commitment, substantial capacity remains available for additional customers.

Australia’s concrete industry includes multiple large regional and national ready-mix operators alongside major suppliers like Holcim, all facing declining fly ash and slag availability. Success with Holcim, a rigorous industry evaluator, offers a replicable model for engaging other potential clients. G360’s ability to cite a binding agreement with a globally recognized supplier, combined with proven production capability and real-world validation on major infrastructure projects, strengthens its commercial negotiation position. The structural supply shortage suggests sustained demand, potentially enabling growth from the initial 4,800-tonne Holcim relationship to significantly larger volumes as more customers are onboarded and capacity expanded.

Technical Validation via Major Infrastructure Project Deployments

Before finalizing the Holcim agreement, G360 validated MKX-CC through supply to commercial-scale concrete applications at key Victorian infrastructure projects. These include Melbourne Airport Business Park, the Eastern Freeway Extension, and the Suburban Rail Loop—high-profile developments with stringent specifications and quality controls. These deployments provided real-world evidence of the product’s technical performance, consistency, and suitability for demanding infrastructure uses beyond laboratory or small-scale trials.

Such infrastructure applications are critical as they represent specification-driven, high-value projects where concrete producers conduct thorough evaluations before adopting new materials. Successful performance on these projects confirms MKX-CC meets technical standards, cures appropriately, and delivers desired concrete properties at commercial scale. This evidence likely influenced Holcim’s technical review and supported the decision to enter a binding supply agreement. Visibility of MKX in major infrastructure projects also enhances marketing, showcasing the product’s readiness for infrastructure-grade applications.

Execution and Supply Chain Risks for G360’s Commercial Rollout

Despite the Holcim agreement’s commercial validation, G360 faces execution risks in scaling from development to sustained commercial supply. The company relies entirely on Calix Limited’s toll treatment facility for MKX production under the current agreement. Any operational disruptions at Calix—technical issues, capacity limits, or changes in partnership terms—could hinder G360’s ability to fulfill Holcim contracts or supply other customers. The toll treatment model also creates cost dependencies, as Calix’s per-tonne fees directly affect G360’s production costs and profit margins.

Moreover, G360’s commercial success depends on consistently maintaining product quality and supply reliability at volumes required by Holcim and prospective clients. While the company has demonstrated production runs of 150 tonnes and distributed over 600 tonnes, scaling to 4,800 tonnes annually under Holcim’s contract, potentially alongside additional agreements, significantly increases operational complexity. Ensuring supply chain dependability, timely delivery to Holcim’s five batching plants, and consistent product performance is vital to sustaining customer relationships and securing future contracts. Any quality lapses, production delays, or delivery failures could damage G360’s market reputation during this critical commercialisation phase and impede growth prospects.