MFS Corporate Bond Fund Class I MBDIX

As we first noted on March 31, 2026, Gaetan Poirier joined Alexander Mackey and Jay Mitchell on the portfolio management team of the MFS Corporate Bond and MFS Meridian US Corporate Bond on that date. Poirier will retain his role as head of credit research and will no longer have direct analyst responsibilities. MFS indicates the strategy’s investment philosophy, process, and day-to-day implementation will remain unchanged. As head of credit research, Poirier oversees global investment-grade, high-yield, and emerging-market corporate research teams. He joined MFS in 1999 and spent most of his career as a high-yield research analyst before assuming his current leadership role in April 2023. Mackey, Mitchell, and Poirier have worked together throughout their careers at MFS, supporting continuity in decision-making and collaboration. The addition follows a deliberate and thoughtful process amid growth across MFS’ fixed-income platform and reflects an effort to institutionalize resources and deepen leadership. The existing team remains a key strength. Since joining the roster in 2017, Mackey has kept the strategy aligned with MFS’ hallmark, fundamentals-driven approach and measured risk-taking, despite his 2023 promotion to co-CIO. The addition of Mitchell in 2023 further strengthened the bench; although relatively new to portfolio management, his two decades of credit research experience have translated into sound judgment. Poirier’s appointment further reinforces this depth without altering roles or responsibilities materially. Overall, the team and investment approach continue to merit Above Average People and Above Average Process Pillar ratings, supported by strong leadership, disciplined execution, and a durable, team-based investment framework.