#USA #Private Equity #Grafine Partners #Amberjack Capital #New York and Houston

Grafine Partners Forms Strategic Collaboration with Amberjack Capital

In a significant move within the private equity landscape, Grafine Partners, an investment firm renowned for nurturing emerging private equity managers, has announced its strategic partnership with Amberjack Capital Partners. This alliance is expected to leverage strengths from both parties, aiming to capitalize on growth opportunities within the lower middle market. The partnership was announced on October 15, 2025, during a joint press event in New York and Houston.

About the Partnership

Grafine Partners, spearheaded by Founder and Managing Partner Elizabeth Weymouth, specializes in identifying and supporting future-focused investment managers with a robust track record. Amberjack Capital, led by Managing Partner Jason Turowsky, focuses on control investments in companies within the Infrastructure Industrial Services and Waste Environmental Services sectors. Although the financial specifics of this partnership have not been disclosed, the implications for both firms are substantial.

Elizabeth Weymouth noted, “Jason and the Amberjack team have built a distinctive private investment platform. They exemplify the experienced and entrepreneurial investors we seek to partner with—those pursuing differentiated strategies that aim to generate strong, risk-adjusted returns. We are thrilled to support Amberjack in their next phase of growth.”

Turowsky echoed this sentiment, emphasizing the advantages of collaborating with Grafine: “This partnership will enhance our ability to continue growing as a firm and investing in the lower middle market critical infrastructure services sector. This sector includes a diverse range of businesses with compelling opportunities for growth, driven by critical trends such as modernizing aging assets, reshoring U.S. production, and meeting increasing power demand.”

Growth Prospects and Strategic Synergy

The unique focus of this partnership lies in Amberjack’s commitment to partnering with entrepreneurs and business owners, providing not only capital but also operational support and governance best practices. This approach resonates with Grafine’s strategy to build investment firms alongside talented managers. By combining resources and expertise, both firms believe they can expedite growth and improve investment outcomes.

Amberjack represents the final investment under Grafine Capital I, Grafine's initial seeding strategy that drew around $600 million in capital commitments in early 2024. This significant closing establishes a foundation for future collaborative investments and expansions. The partnership opens doors to a broader array of investment opportunities in sectors critical to modern infrastructure and the environment.

Legal Support for the Partnership

In facilitating this partnership, Grafine was advised by Kirkland & Ellis, while Amberjack received legal counsel from Davis Polk & Wardwell LLP. This noteworthy collaboration between two investment powerhouses promises to not only reshape their individual trajectories but also contribute to the vitality of the industries they serve.

About the Firms

Grafine Partners: Founded by Elizabeth Weymouth, Grafine Partners is positioned as an innovative alternative investment management firm dedicated to aligning incentives for institutional investors. Their pioneering focus allows them to source unique investment opportunities that align with the evolving needs of their investor network.

Amberjack Capital Partners: Located in Houston, Amberjack Capital is committed to nurturing market leaders in the industrial, infrastructure, and environmental sectors. Known for being a foundational investor in founder-led companies, Amberjack prides itself on driving growth through strategic partnerships and operational excellence.

In conclusion, the strategic partnership between Grafine Partners and Amberjack Capital marks a promising advancement in private equity investment, setting the stage for impactful growth and innovation in the competitive investment landscape.