For the twelve months ended May 31, 2025, Class A shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 9.52%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class B shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 8.72%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class C shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 8.71%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class I shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 9.80%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class R1 shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 8.72%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class R2 shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 9.28%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class R3 shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 9.55%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class R4 shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 9.84%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class R6 shares of the MFS Aggressive Growth Allocation Fund (fund) provided a total return of 9.89%, at net asset value. This compares with a return of 13.52% for the fund’s benchmark, the Standard & Poor's 500 Stock Index. The fund's other benchmark, the MFS Aggressive Growth Allocation Fund Blended Index (Blended Index), generated a return of 12.97%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class A shares of the MFS Conservative Allocation Fund (fund) provided a total return of 7.09%, at net asset value. This compares with a return of 5.46% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the MFS Conservative Allocation Fund Blended Index (Blended Index), generated a return of 8.50%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class B shares of the MFS Conservative Allocation Fund (fund) provided a total return of 6.30%, at net asset value. This compares with a return of 5.46% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the MFS Conservative Allocation Fund Blended Index (Blended Index), generated a return of 8.50%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index:

For the twelve months ended May 31, 2025, Class C shares of the MFS Conservative Allocation Fund (fund) provided a total return of 6.25%, at net asset value. This compares with a return of 5.46% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the MFS Conservative Allocation Fund Blended Index (Blended Index), generated a return of 8.50%. The Blended Index reflects the blended returns of broad asset class indices, with percentage allocations to each index designed to resemble the long term strategic allocations of the fund. The market indices and related percentage allocations used to compile the Blended Index are set forth in the Fund Performance.

Global equity markets reached record levels during the period but fell back from those highs amid international trade friction in the early months of the second Trump term.  In Europe, renewed focus on defense and infrastructure spending brightened the outlook.

Market volatility rose toward the end of the period as the Trump administration imposed, then suspended for 90-days, an array of very high tariffs on most US trading partners. A temporary truce was reached separately with China, though tensions remain high. President Trump faces legal challenges to some of his tariff authority but has other mechanisms at his disposal if the challenges are successful. Sectoral tariffs remain in place.   

Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. However, the pace of disinflation slowed toward the end of the period, particularly in the US, while tariffs made for a more difficult policymaking environment.  

In fixed income markets, global yields declined during the first quarter of the reporting period, then fluctuated within a narrow band for the remainder of the period as volatility persisted. Credit spreads declined throughout the reporting period, and remain near historical lows, despite a brief period of widening as tariff concerns took hold. US bond market volatility, as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index, ended the period near session lows after increasing around the US election and trade war.

Top contributors to performance relative to the Blended Index:

Top detractors from performance relative to the Blended Index: