American Beacon Partners Names Former Aflac Global Exec as CFO

Irving-based diversified asset management platform American Beacon Partners has named John Linnehan as its new chief financial officer, overseeing the company’s financial health, strategic planning, and corporate initiatives.

With more than three decades of C-suite leadership experience, Linnehan will direct company financial activities including treasury, accounting, tax, financial planning and analysis, risk management, reporting, and capital management to foster sustainable growth, American Beacon said.

“John is a highly respected financial executive with a deep understanding of our industry and the operational demands of a growing investment firm,” Greg Stumm, president and CEO of American Beacon Partners, said in a statement. “He brings a mix of strategic insight, decades of financial leadership in both the ‘TradFi’ and ‘DeFi’ worlds, and a vast amount of knowledge—all of which makes him an excellent fit as we continue to grow and evolve as an organization.”

Prior to American Beacon, Linnehan was CFO at Aflac Global Investments, a $100-billion- insurance investment firm where he led finance, operations, compliance and risk management. Before Aflac, Linnehan served as CFO at Guggenheim Investments, reinforcing their growth trajectory from $54 billion to $225 billion, and at SGI Rydex, where he restructured the U.S. retail investment platform.

Linnehan also served as CEO of 21X U.S, a digital asset exchange for tokenized finance. He was the founder and Head of Strategic Relationships at Digital Investment Securities, a platform engineered to streamline investing in real world assets, equities, fixed income, and funds through advanced tokenization and digital infrastructure.

Previously, Linnehan co-founded Sustainable Leaders Investment Management, where he helped build an ESG multi-boutique investment platform that utilized proprietary research to create high active-share investments and indexes. He was a founder and president at Promethos Capital, where he managed the distribution, marketing, compliance, and operations for the firm.

“American Beacon has built a distinctive platform rooted in high‑quality partnerships, disciplined execution, and a clear strategic vision,” Linnehan said. “I’m thrilled to be joining such a well‑respected investment firm and look forward to partnering with the leadership team to support strategic growth, enhance operational and financial capabilities, and help drive long‑term value for the organization and its partners.”