Macquarie expands equity in Dow’s Diamond Infrastructure Solutions, boosting proceeds to $3B while advancing carbon transformation and floating solar initiatives.
Dow Inc. has confirmed that it will receive an additional $540 million in proceeds following Macquarie Asset Management’s decision to expand its investment in Diamond Infrastructure Solutions (Diamond). With this move, Macquarie has increased its minority equity stake in Diamond from 40% to 49%, strengthening its role as a key strategic partner. This transaction brings the total proceeds Dow has secured from its engagement with Macquarie to approximately $3 billion.
Jim Fitterling, chair and chief executive officer of Dow, highlighted the significance of this latest development, emphasizing that the expansion reflects a high level of trust and alignment between the two companies. He noted that the partnership is built on a foundation of long-term collaboration and is aimed at delivering sustainable, value-driven outcomes for both parties.
The enhanced stake by Macquarie Asset Management underscores the shared commitment to advancing Diamond Infrastructure Solutions as a leader in critical service sectors. Diamond provides a broad range of solutions across industries such as energy, environmental management, infrastructure, and pipeline services. With more than 70 customers already being served and additional new clients expected, Diamond is positioned for accelerated growth. Importantly, while Macquarie has increased its financial involvement, Dow will continue to hold majority ownership, ensuring it retains operational control over the company’s strategic direction and execution.
This investment aligns with a series of innovative initiatives that Diamond has recently undertaken. In May 2025, Diamond announced a significant partnership with the Danish climate technology startup Again. Under this collaboration, Diamond will host the first U.S.-based CO2 transformation facility at its Texas City site, a step that demonstrates its commitment to advancing carbon reduction technologies and supporting global decarbonization goals.
In another progressive move, Diamond and Third Pillar Solar recently revealed a joint agreement granting the solar company exclusive access to Diamond’s Texas reservoir system. This initiative aims to explore the feasibility of deploying up to 500 megawatts of floating solar energy capacity, which could significantly boost renewable energy adoption in the region.
Through these initiatives, Diamond Infrastructure Solutions continues to expand its footprint in innovative, sustainable projects that complement its core service offerings. Macquarie’s increased stake signals confidence in Diamond’s potential and positions both Macquarie and Dow to capitalize on emerging opportunities in the evolving energy and infrastructure landscape. Together, the strengthened partnership is expected to accelerate growth, support sustainability objectives, and create long-term value for customers and stakeholders alike.
