July 21, 2026 • 3 min read

Ryan MacKay Promoted to Portfolio Manager on Loomis Sayles Global Fixed Income Team

  • Press Release
  • In The News

BOSTON (JULY 21, 2026) – Loomis, Sayles & Company, with $434.6 billion in assets under management*, is pleased to announce that Ryan MacKay has been promoted to Global Credit Portfolio Manager for the Global Fixed Income Team’s global credit and global corporate strategies. 

Ryan has served as a Global Credit Strategist since joining the Global Fixed Income Team in 2018 and will continue in that role as he steps into this expanded position as a decision-making member of the portfolio management team. He joins team heads and portfolio managers David Rolley, Lynda Schweitzer and Scott Service, as well as fellow Global Credit Portfolio Manager Heather Ridill. 

In his new role, Ryan will remain a key contributor to setting overall credit risk across portfolios while increasing his involvement in portfolio management decisions. He will also continue to work closely with Loomis Sayles’ research and trading teams to identify and evaluate alpha-generating opportunities. 

With $38.2 billion in assets under management*, the Global Fixed Income Team combines world-class research with disciplined, diversified strategies to uncover opportunities across global fixed income markets. Leveraging Loomis Sayles’ deep experience in credit, securitized, macro, sovereign, and quantitative analysis, the team seeks to outperform benchmarks through thoughtful positioning in credit, currencies, and yield curves.

“Ryan’s sustained contributions to alpha generation across our credit portfolios, as well as his growing leadership role within the team, have meaningfully enhanced our investment process,” said Lynda Schweitzer and Scott Service, Co-Heads of the Loomis Sayles Global Fixed Income Team. “His experience, judgment and partnership with our research organization strengthen the differentiated insights we bring to clients.” 

Ryan joined Loomis Sayles in 1999 as a credit research associate and was promoted to credit analyst in 2001. He later became a senior credit research analyst, covering the pharmaceuticals, healthcare and health insurance sectors, and served as High Yield Sector Team Coordinator for the Credit Research Group. Prior to joining Loomis Sayles, Ryan was a senior portfolio analyst at Putnam Investments. He earned a BA from the University of New Hampshire and an MBA from Boston College. Ryan holds the CFA Institute’s Sustainable Investing Certificate. 

Learn more about the Loomis Sayles Global Fixed Income Team.

*as of June 30, 2026

About Loomis Sayles

For a century, Loomis, Sayles & Company has built a legacy focused on fulfilling the investment needs of institutional and retail clients worldwide. To do this, our performance-driven investors aim to deliver long-term results by leveraging deep, independent research and rigorous risk analysis. With the resources, foresight, and flexibility to look far and wide for value in broad and narrow markets, Loomis Sayles has remained a trusted partner to its clients since 1926. Loomis Sayles proudly manages $434.6 billion* in assets on behalf of clients worldwide (as of June 30, 2026).

*Includes the assets of both Loomis, Sayles & Co., LP, and Loomis Sayles Trust Company, LLC. ($56.4 billion for the Loomis Sayles Trust Company). Loomis Sayles Trust Company is a wholly owned subsidiary of Loomis, Sayles & Company, L.P.

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