MGIAX SEC-arkivering - Mfs Series Trust X - MFS International Intrinsic Value Fund Class A- Årsrapport, fuldmagtserklæring, prospekt

Grundlæggende statistik

LEI	GLINMRWNKCBOHYKQ2131
CIK	783740

SEC Filings

All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Mfs Series Trust X - MFS International Intrinsic Value Fund Class A

SEC Filings (Chronological Order)

Denne side giver en komplet, kronologisk liste over SEC-arkiveringer, eksklusive ejerskabsregistreringer, som vi leverer andre steder.

August 19, 2025	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 August 19, 2025 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
March 21, 2025	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 March 21, 2025 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
March 11, 2025	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 March 11, 2025 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
September 30, 2024	DEFA14A	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Definitive Proxy State
September 13, 2024	DEF 14A	IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE SHAREHOLDER MEETINGS TO BE HELD ON NOVEMBER 14, 2024. THIS PROXY STATEMENT IS AVAILABLE AT www.proxy-direct.com/mfs-34066 IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE SHAREHOLDER MEETINGS TO BE HELD ON NOVEMBER 14, 2024.
September 20, 2023	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 September 20, 2023 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
December 23, 2022	NPORT-EX	(a) Non-income producing security. (d) In default. (f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outst Quarterly Report October 31, 2022 MFS® Emerging Markets Debt Fund EMD-Q1 Portfolio of Investments 10/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2022 MFS® Aggressive Growth Allocation Fund AGG-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2022 MFS® Blended Research® Mid Cap Equity Fund BMS-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2022 MFS® International Large Cap Value Fund MKV-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2022 MFS® International Intrinsic Value Fund FGI-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2022 MFS® International Growth Fund FGF-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2022 MFS® Moderate Allocation Fund MOD-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2022 MFS® Blended Research® Value Equity Fund BRU-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2022 MFS® Blended Research® Small Cap Equity Fund BRS-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2022 MFS® Conservative Allocation Fund CON-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2022 MFS® Growth Allocation Fund GRO-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2022 MFS® Emerging Markets Equity Fund FEM-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und Quarterly Report August 31, 2022 MFS® Managed Wealth Fund MGW-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2022 MFS® Blended Research® Growth Equity Fund BRW-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2022 MFS® International DiversificationSM Fund MDI-Q1 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2022	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts and cleared swap agreements. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securitie NPORT-EX 2 edgar.htm Quarterly Report August 31, 2022 MFS® Global Opportunistic Bond Fund GLB-Q3 Portfolio of Investments 8/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Bonds – 91.2% Aerospace & Defense – 0.1% Raytheon Technologies Corp., 2.82%, 9/01/2051 $ 1,987,
September 26, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report July 31, 2022 MFS® Emerging Markets Debt Local Currency Fund EML-Q3 Portfolio of Investments 7/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
June 23, 2022	NPORT-EX	(a) Non-income producing security. (d) In default. (f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outst NPORT-EX 3 NPORT52M7619923760422.htm Quarterly Report April 30, 2022 MFS® Emerging Markets Debt Fund EMD-Q3 Portfolio of Investments 4/30/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by jurisdiction. Issuer Shares/Par Value ($) Bonds – 91.0% Angola – 1.4% Republic of Angola, 8%, 11/26/2029 (n) $ 2,388,000 $2,230,917 Republic
April 26, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu NPORT-EX 2 BLENDEDRESEARCH.htm Quarterly Report February 28, 2022 MFS® Blended Research® Mid Cap Equity Fund BMS-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Common Stocks – 98.8% Aerospace & Defense – 2.4% CACI International, Inc., “A
April 26, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu NPORT-EX 2 INTLLGCAPVL.htm Quarterly Report February 28, 2022 MFS® International Large Cap Value Fund MKV-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Common Stocks – 97.3% Aerospace & Defense – 1.9% BAE Systems PLC 4,114,575 $39,719,7
April 26, 2022	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und NPORT-EX 2 GLOBALOPP.htm Quarterly Report February 28, 2022 MFS® Global Opportunistic Bond Fund GLB-Q1 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Bonds – 95.5% Aerospace & Defense – 0.4% Raytheon Technologies Corp., 2.82%, 9/01/2051 $
April 25, 2022	NPORT-EX	(a) Non-income producing security. Quarterly Report February 28, 2022 MFS® Emerging Markets Equity Fund FEM-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und Quarterly Report February 28, 2022 MFS® Managed Wealth Fund MGW-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2022 MFS® Blended Research® Small Cap Equity Fund BRS-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2022 MFS® Conservative Allocation Fund CON-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2022 MFS® Blended Research® Value Equity Fund BRU-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2022 MFS® International Intrinsic Value Fund FGI-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2022 MFS® Aggressive Growth Allocation Fund AGG-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2022 MFS® Blended Research® Growth Equity Fund BRW-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2022 MFS® International Growth Fund FGF-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2022 MFS® International DiversificationSM Fund MDI-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2022 MFS® Moderate Allocation Fund MOD-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 25, 2022	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2022 MFS® Growth Allocation Fund GRO-Q3 Portfolio of Investments 2/28/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
March 25, 2022	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report January 31, 2022 MFS® Emerging Markets Debt Local Currency Fund EML-Q1 Portfolio of Investments 1/31/22 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
January 10, 2022	DEF 14A	UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 DEF 14A 1 d248380ddef14a.htm MFS SERIES TRUST X UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party Other Than the Registrant ☐ Check the Appropriate Box: ☐ Preliminary Proxy Statement ☐ Confidential for Use of the Commission Only (as permitte
December 23, 2021	NPORT-EX	(a) Non-income producing security. (d) In default. (f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outst Quarterly Report October 31, 2021 MFS® Emerging Markets Debt Fund EMD-Q1 Portfolio of Investments 10/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
December 17, 2021	PRE 14A	UNITED STATED SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 PRE 14A 1 d248094dpre14a.htm MFS SERIES TRUST X UNITED STATED SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party Other Than the Registrant ☐ Check the Appropriate Box: ☒ Preliminary Proxy Statement ☐ Confidential for Use of the Commission Only (as permitte
October 26, 2021	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und Quarterly Report August 31, 2021 MFS® Global Opportunistic Bond Fund (formerly MFS® Global Bond Fund) GLB-Q3 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2021 MFS® International Large Cap Value Fund MKV-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2021 MFS® Blended Research® Mid Cap Equity Fund BMS-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2021 MFS® Conservative Allocation Fund CON-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2021 MFS® Blended Research® Growth Equity Fund BRW-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(a) Non-income producing security. Quarterly Report August 31, 2021 MFS® Emerging Markets Equity Fund FEM-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2021 MFS® Blended Research® Small Cap Equity Fund BRS-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und Quarterly Report August 31, 2021 MFS® Managed Wealth Fund MGW-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(a) Non-income producing security. Quarterly Report August 31, 2021 MFS® International Growth Fund FGF-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2021 MFS® Growth Allocation Fund GRO-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2021 MFS® Blended Research® Value Equity Fund BRU-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2021 MFS® International DiversificationSM Fund MDI-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2021 MFS® Moderate Allocation Fund MOD-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2021 MFS® International Intrinsic Value Fund FGI-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2021 MFS® Aggressive Growth Allocation Fund AGG-Q1 Portfolio of Investments 8/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
September 24, 2021	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS? INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 September 24, 2021 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
September 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report July 31, 2021 MFS® Emerging Markets Debt Local Currency Fund EML-Q3 Portfolio of Investments 7/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
July 29, 2021	COVER	111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 July 29, 2021 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: MFS® Series Trust X (the “Trust”) (File Nos. 33-1657 and 811-4492) on behalf of MFS® Aggressive Growth Allocation Fund, MFS® Conservative Allocation Fund, MFS® Growth Allocation Fund, and MFS® Moderate Alloca
June 23, 2021	NPORT-EX	(a) Non-income producing security. (d) In default. (f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outst Quarterly Report April 30, 2021 MFS® Emerging Markets Debt Fund EMD-Q3 Portfolio of Investments 4/30/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2021 MFS® Blended Research® Value Equity Fund BRU-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2021 MFS® Conservative Allocation Fund CON-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und Quarterly Report February 28, 2021 MFS® Managed Wealth Fund MGW-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2021 MFS® International Intrinsic Value Fund FGI-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2021 MFS® International Large Cap Value Fund MKV-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2021 MFS® Emerging Markets Equity Fund FEM-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2021 MFS® Blended Research® Small Cap Equity Fund BRS-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2021 MFS® Aggressive Growth Allocation Fund AGG-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2021 MFS® International Growth Fund FGF-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2021 MFS® Growth Allocation Fund GRO-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2021 MFS® Blended Research® Growth Equity Fund BRW-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 28, 2021 MFS® Blended Research® Mid Cap Equity Fund BMS-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fund's investments in affiliated issu Quarterly Report February 28, 2021 MFS® Global Bond Fund (Effective April 30, 2021, the name of the fund will change to MFS® Global Opportunistic Bond Fund) GLB-Q1 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2021 MFS® Moderate Allocation Fund MOD-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2021	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 28, 2021 MFS® International DiversificationSM Fund MDI-Q3 Portfolio of Investments 2/28/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
March 26, 2021	NPORT-EX	(a) Non-income producing security. (d) In default. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate Quarterly Report January 31, 2021 MFS® Emerging Markets Debt Local Currency Fund EML-Q1 Portfolio of Investments 1/31/21 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
March 22, 2021	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS? INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 March 22, 2021 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
January 28, 2021	COVER	111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 January 28, 2021 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: MFS® Series Trust X (the “Trust”) (File Nos. 33-1657 and 811-4492) on behalf of MFS® Global Bond Fund (the “Fund”) Post-Effective Amendment No. 161 to the Registration Statement on Form N-1A Ladies and Gen
December 23, 2020	NPORT-EX	(a) Non-income producing security. (d) In default. (f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outst Quarterly Report October 31, 2020 MFS® Emerging Markets Debt Fund EMD-Q1 Portfolio of Investments 10/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(a) Non-income producing security. Quarterly Report August 31, 2020 MFS® Emerging Markets Equity Fund FEM-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2020 MFS® Blended Research® Growth Equity Fund BRW-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2020 MFS® Blended Research® Small Cap Equity Fund BRS-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2020 MFS® Aggressive Growth Allocation Fund AGG-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2020 MFS® Blended Research® Value Equity Fund BRU-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2020 MFS® International Growth Fund FGF-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2020 MFS® Conservative Allocation Fund CON-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und Quarterly Report August 31, 2020 MFS® Managed Wealth Fund MGW-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2020 MFS® International DiversificationSM Fund MDI-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2020 MFS® Moderate Allocation Fund MOD-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2020 MFS® International Intrinsic Value Fund FGI-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 26, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report August 31, 2020 MFS® Growth Allocation Fund GRO-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 23, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2020 MFS® International Large Cap Value Fund MKV-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 23, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report August 31, 2020 MFS® Blended Research® Mid Cap Equity Fund BMS-Q1 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 23, 2020	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und Quarterly Report August 31, 2020 MFS® Global Bond Fund GLB-Q3 Portfolio of Investments 8/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
September 23, 2020	NPORT-EX	- Quarterly Report July 31, 2020 MFS® Emerging Markets Debt Local Currency Fund Portfolio of Investments 7/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
June 23, 2020	NPORT-EX	(a) Non-income producing security. (d) In default. (f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outst Quarterly Report April 30, 2020 MFS® Emerging Markets Debt Fund Portfolio of Investments 4/30/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
June 17, 2020	CORRESP	- CORRESP 1 filename1.htm MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 June 17, 2020 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 RE: Post-Effective Amendment No. 155 to Registration Statement on Form N-1A for MFS Series Trust X (the "Trust”) on behalf of MFS International La
April 24, 2020	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts and cleared swap agreements. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securitie Quarterly Report February 29, 2020 MFS® Global Bond Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 24, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 29, 2020 MFS® Blended Research® Mid Cap Equity Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(a) Non-income producing security. Quarterly Report February 29, 2020 MFS® Emerging Markets Equity Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 29, 2020 MFS® International DiversificationSM Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 29, 2020 MFS® International Intrinsic Value Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 29, 2020 MFS® Growth Allocation Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 29, 2020 MFS® Blended Research® Growth Equity Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 29, 2020 MFS® Aggressive Growth Allocation Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(f) All or a portion of the security has been segregated as collateral for open futures contracts. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is und Quarterly Report February 29, 2020 MFS® Managed Wealth Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 29, 2020 MFS® Blended Research® Value Equity Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 29, 2020 MFS® Moderate Allocation Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(a) Non-income producing security. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fu Quarterly Report February 29, 2020 MFS® Blended Research® Small Cap Equity Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(a) Non-income producing security. Quarterly Report February 29, 2020 MFS® International Growth Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 23, 2020	NPORT-EX	(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate value of the fund’s investments in affiliated issue Quarterly Report February 29, 2020 MFS® Conservative Allocation Fund Portfolio of Investments 2/29/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
April 13, 2020	COVER	111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 April 13, 2020 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: MFS® Series Trust X (the “Trust”) (File Nos. 33-1657 and 811-4492) on behalf of MFS® International Large Cap Value Fund (the “New Fund”) Post-Effective Amendment No. 155 to the Registration Statement on Form
March 25, 2020	NPORT-EX	(a) Non-income producing security. (d) In default. (h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate Quarterly Report January 31, 2020 MFS® Emerging Markets Debt Local Currency Fund Portfolio of Investments 1/31/20 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
January 29, 2020	CORRESP	111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-4384 / Fax 617-954-7723 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-4384 / Fax 617-954-7723 January 29, 2020 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
December 20, 2019	NPORT-EX	(a) Non-income producing security. (d) In default. (f) All or a portion of the security has been segregated as collateral for open futures contracts. Quarterly Report October 31, 2019 MFS® Emerging Markets Debt Fund Portfolio of Investments 10/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - Quarterly Report August 31, 2019 MFS® International Growth Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - Quarterly Report August 31, 2019 MFS® Managed Wealth Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 NPORT13732192074902687.htm Quarterly Report August 31, 2019 MFS® International DiversificationSM Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Investment Companies (h) – 99.9% International Stock Funds – 99.9% MFS Emerging
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - Quarterly Report August 31, 2019 MFS® Moderate Allocation Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 NPORT13731097078225378.htm Quarterly Report August 31, 2019 MFS® Aggressive Growth Allocation Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Investment Companies (h) – 100.0% International Stock Funds – 29.9% MFS Emerging Ma
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 NPORT13731141847331963.htm Quarterly Report August 31, 2019 MFS® Blended Research® Value Equity Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Common Stocks – 98.6% Aerospace – 1.9% Boeing Co. 2,305 $839,227 Honeywell Intern
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - Quarterly Report August 31, 2019 MFS® Conservative Allocation Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 NPORT13733068830200195.htm Quarterly Report August 31, 2019 MFS® International Intrinsic Value Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Common Stocks – 92.6% Airlines – 0.5% Ryanair Holdings PLC, ADR (a) 2,239,764 $128
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 NPORT13732505420449560.htm Quarterly Report August 31, 2019 MFS® Blended Research® Growth Equity Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Common Stocks – 98.8% Aerospace – 3.1% Boeing Co. 11,560 $4,208,880 Leidos Holdi
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - Quarterly Report August 31, 2019 MFS® Blended Research® Small Cap Equity Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - Quarterly Report August 31, 2019 MFS® Emerging Markets Equity Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - Quarterly Report August 31, 2019 MFS® Growth Allocation Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund.
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 edgar20qz5hti.htm Quarterly Report August 31, 2019 MFS® Global Bond Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Bonds – 96.0% Aerospace – 0.3% Huntington Ingalls Industries, Inc., 3.483%, 12/01/2027 $ 520,000 $547,716 Tr
October 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 edgar.htm Quarterly Report August 31, 2019 MFS® Blended Research® Mid Cap Equity Fund Portfolio of Investments 8/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Common Stocks – 99.1% Aerospace – 3.0% CACI International, Inc., “A” (a) 9,441 $2,098,640 Curtis
September 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 NPORT11032236062452092.htm Quarterly Report July 31, 2019 MFS® Emerging Markets Debt Local Currency Fund Portfolio of Investments 7/31/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Issuer Shares/Par Value ($) Bonds – 93.9% Argentina – 0.7% Republic of Argentina, 3.75%, 12/31/2038 $ 1,1
June 25, 2019	NPORT-EX	Mfs Series Trust X NPORT-EX - - NPORT-EX 1 NPORT3158725763974145.htm Quarterly Report April 30, 2019 MFS® Emerging Markets Debt Fund Portfolio of Investments 4/30/19 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by jurisdiction. Issuer Shares/Par Value ($) Bonds – 91.8% Angola – 0.5% Republic of Angola, 9.5%, 11/12/2025 $ 7,100,000 $7,959,029 Republic of Angol
April 23, 2019	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
April 23, 2019	N-Q	Mfs Series Trust X MFS SERIES TRUST X - GLOBAL BOND FUND N-Q (Quarterly Schedule of Portfolio Holdings) MFS SERIES TRUST X - GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
April 22, 2019	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
April 22, 2019	N-Q	Mfs Series Trust X MFS SERIES TRUST X N-Q (Quarterly Schedule of Portfolio Holdings) MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
April 16, 2019	CORRESP	Mfs Series Trust I CORRESP CORRESP 1 filename1.htm 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-4384 / Fax 617-954-7723 April 16, 2019 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Re: Filings of Forms N-CSR for MFS Series Trust I (File Nos. 33-7638; 811-04777), MFS Series Trust X (File Nos. 33-1657; 811-4492), MFS Series Trust XII
March 22, 2019	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
March 22, 2019	N-Q	Mfs Series Trust X MFS SERIES TRUST X N-Q (Quarterly Schedule of Portfolio Holdings) MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
December 19, 2018	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
December 19, 2018	N-Q	Mfs Series Trust X MFS SERIES TRUST X - EMERGING MARKETS DEBT FUND N-Q (Quarterly Schedule of Portfolio Holdings) N-Q 1 d643998dnq.htm MFS SERIES TRUST X - EMERGING MARKETS DEBT FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts
October 25, 2018	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
October 25, 2018	N-Q	Mfs Series Trust X MFS SERIES TRUST X N-Q (Quarterly Schedule of Portfolio Holdings) MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
October 25, 2018	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d607655dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which
October 25, 2018	N-Q	Mfs Series Trust X MFS SERIES TRUST X - GLOBAL BOND FUND N-Q (Quarterly Schedule of Portfolio Holdings) N-Q 1 d607655dnq.htm MFS SERIES TRUST X - GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-4492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Add
September 20, 2018	N-Q	Mfs Series Trust X MFS SERIES TRUST X N-Q (Quarterly Schedule of Portfolio Holdings) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal executive offices) (Zip code) Christopher R.
September 20, 2018	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d600555dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which
June 21, 2018	N-Q	Mfs Series Trust X MFS SERIES TRUST X N-Q (Quarterly Schedule of Portfolio Holdings) MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
June 21, 2018	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d576915dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which
April 18, 2018	N-Q	Mfs Series Trust X MFS SERIES TRUST X N-Q (Quarterly Schedule of Portfolio Holdings) MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
April 18, 2018	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
April 18, 2018	N-Q	Mfs Series Trust X MFS SERIES TRUST X - GLOBAL BOND FUND N-Q (Quarterly Schedule of Portfolio Holdings) N-Q 1 d533780dnq.htm MFS SERIES TRUST X - GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-4492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Add
April 18, 2018	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
March 29, 2018	EX-99.77I NEW SECUR	EX-99.77I NEW SECUR SUB-ITEM 77I CREATION OF SHARE CLASS MFS Emerging Markets Debt Fund, a series of MFS Series Trust X (the "Trust") established a new class of shares, Class T shares, as described in the prospectus contained in Post-Effective Amendment No.
March 29, 2018	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (A) Revised Appendix A to the By-Laws Appendix A, dated October 19, 2017 to the Master Amended and Restated By-Laws for MFS Series Trust X, dated December 16, 2004, is contained in Post-Effective Amendment No.
March 29, 2018	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (D) See Amendment to the Declaration of Trust under 77Q1(a).
March 26, 2018	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d519371dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which
March 26, 2018	N-Q	Mfs Series Trust X MFS SERIES TRUST X N-Q (Quarterly Schedule of Portfolio Holdings) MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
January 26, 2018	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (D) See Amendments to the Declaration of Trust under 77Q1(a).
January 26, 2018	EX-99.77I NEW SECUR	EX-99.77I NEW SECUR SUB-ITEM 77I CREATION OF SHARE CLASSES MFS Absolute Return Fund, MFS Aggressive Growth Allocation Fund, MFS Blended Research Growth Equity Fund, MFS Blended Research Mid Cap Equity Fund, MFS Blended Research Small Cap Equity Fund, MFS Blended Research Value Equity Fund, MFS Conservative Allocation Fund, MFS Emerging Markets Debt Fund, MFS Emerging Markets Debt Local Currency Fund, MFS Emerging Mar
January 26, 2018	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (A) Amendments to Declaration of Trust and Revised Appendix A to the By-Laws Amendments, dated May 9, 2017, to the Amended and Restated Declaration of Trust, dated December 16, 2004, as amended of MFS Series Trust X, are contained in Post-Effective Amendment No.
December 20, 2017	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
December 20, 2017	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
October 26, 2017	N-Q	Mfs Series Trust X - MFS SERIES TRUST X GLOBAL BOND FUND N-Q MFS SERIES TRUST X GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
October 26, 2017	N-Q	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-4492 MFS SERIES TRUST X (Exact name of regi UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-4492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal executive offices) (Zip code) Christopher R.
October 26, 2017	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d446155dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which
October 26, 2017	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
September 28, 2017	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
September 28, 2017	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
July 27, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB AMENDMENT TO INVESTMENT ADVISORY AGREEMENT AMENDMENT effective as of March 30, 2017 to the Investment Advisory Agreement dated May 31, 2010 (the "Agreement") by and between MFS Series Trust X (the "Trust") on behalf of the MFS Global Bond Fund (the "Fund"), a series of the Trust, and Massachusetts Financial Services Company, a Delaware corporation (the "Adviser").
July 27, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB MFS SERIES TRUST X CERTIFICATION OF AMENDMENT TO THE DECLARATION OF TRUST ESTABLISHMENT AND DESIGNATION OF CLASS Pursuant to Sections 6.
June 28, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (E) Amendment to Investment Advisory Agreement An Amendment effective February 28, 2017, to the Investment Advisory Agreement, dated September 14, 2011, by and between MFS Series Trust X, on behalf of its series MFS Emerging Markets Debt Local Currency Fund, and Massachusetts Financial Services Company, is contained in Post-Effective Amendment No.
June 28, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (E) Amendment to Investment Advisory Agreement An Amendment effective February 28, 2017, to the Investment Advisory Agreement, dated September 14, 2011, by and between MFS Series Trust X, on behalf of its series MFS Emerging Markets Debt Local Currency Fund, and Massachusetts Financial Services Company, is contained in Post-Effective Amendment No.
June 28, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB Series Trust X is filing an amendment to correct the number of funds in the trust being filed as of April 30[th], 2017.
June 22, 2017	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d387421dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which
June 22, 2017	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
April 24, 2017	N-Q	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of reg N-Q 1 d353806dnq.htm MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal
April 24, 2017	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
April 20, 2017	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d319417dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which
April 20, 2017	N-Q	Mfs Series Trust X - MFS SERIES TRUST X - GLOBAL BOND FUND N-Q MFS SERIES TRUST X - GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
April 6, 2017	CORRESP	111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-4340 / Fax 617-954-7723 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-4340 / Fax 617-954-7723 April 6, 2017 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
March 30, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (D) See Amendment to the Declaration of Trust under 77Q1(a).
March 30, 2017	EX-99.77I NEW SECUR	EX-99.77I NEW SECUR SUB-ITEM 77I Re-designation of Share Class MFS Emerging Markets Debt Fund, a series of MFS Series Trust X (the "Trust"), re-designated Class R5 Shares as Class R6 Shares effective August 26, 2016, as described in the supplement to the Fund's then current prospectus as filed with the Securities and Exchange Commission via EDGAR on June 28, 2016 under Rule 497 under the Securities Act of 1933.
March 30, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (A) Revised Appendix A to the By-Laws Appendix A, dated August 5, 2016 to the Master Amended and Restated By-Laws for MFS Series Trust X, dated January 1, 2002 as revised through August 5, 2016, is contained in Post-Effective Amendment No.
March 30, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (E) Amendment to Investment Advisory Agreement An Amendment effective November 28, 2016, to the Investment Advisory Agreement, dated January 1, 2002, by and between MFS Series Trust X, on behalf of its series MFS Emerging Markets Debt Fund, and Massachusetts Financial Services Company, is contained in Post-Effective Amendment No.
March 24, 2017	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal executive offices) (Zip code) Christopher R.
March 24, 2017	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, James O. Yost, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mis
February 1, 2017	DEFA14A	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State
January 30, 2017	DEF 14A	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State
January 26, 2017	EX-99.77I NEW SECUR	EX-99.77I NEW SECUR SUB-ITEM 77I Re-designation of Share Class MFS Absolute Return Fund, MFS Blended Research Growth Equity Fund, MFS Blended Research Small Cap Equity Fund, MFS Blended Research Value Equity Fund, MFS Emerging Markets Equity Fund, MFS International Growth Fund, and MFS International Value Fund, each a series of MFS Series Trust X (the "Trust"), re- designated Class R5 shares as Class R6 shares effective August 26, 2016, as described in the supplement to each Fund's then current prospectus as filed with the Securities and Exchange Commission via EDGAR on June 28, 2016 under Rule 497 under the Securities Act of 1933.
January 26, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (D) See Amendments to the Declaration of Trust under 77Q1(a).
January 26, 2017	EX-99.77C VOTES	EX-99.77C VOTES SUB-ITEM 77C The sole shareholder of the MFS Blended Research Mid Cap Equity Fund (the "Fund"), a series of MFS Series Trust X (the "Trust"), took action by unanimous written consent, as permitted by the Trust's Declaration of Trust, on August 18, 2016 to approve the following matters: 1.
January 26, 2017	EX-99.77D POLICIES	EX-99.77D POLICIES SUB-ITEM 77D MFS Blended Research Growth Equity Fund, MFS Blended Research Small Cap Equity Fund and MFS Blended Research Value Equity Fund, each a series of MFS Series Trust X, changed certain disclosure under "Principal Investment Strategies" as described in the supplement dated June 28, 2016 to each such fund's then current prospectus as filed with the Securities and Exchange Commission via EDGAR on June 28, 2016 under Rule 497 under the Securities Act of 1933.
January 26, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1(E) New Investment Advisory Agreement The Investment Advisory Agreement dated August 18, 2016 by and between MFS Series Trust X, on behalf of its series MFS Blended Research Mid Cap Equity Fund, and Massachusetts Financial Services Company, is contained in Post- Effective Amendment No.
January 26, 2017	EX-99.77H CHNG CNTRL	EX-99.77H CHNG CNTRL SUB-ITEM 77H As of November 30, 2016, the following entity did not own 25% or more of the voting securities of the MFS Absolute Return Fund: - \|ENTITY \| - \|MFS GROWTH ALLOCATION FUND\| - As of November 30, 2016, the following entities did not own 25% or more of the voting securities of the MFS Blended Research Growth Equity Fund: - \|ENTITY \| - \|MASSACHUSETTS FINANCIAL SERVICES COMPANY\| - \|TAYLOR PU
January 26, 2017	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1 (A) Revised Appendix A to the By-Laws Appendix A, dated August 5, 2016 to the Master Amended and Restated By-Laws for MFS Series Trust X, dated January 1, 2002 as revised through August 5, 2016, is contained in Post-Effective Amendment No.
December 27, 2016	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, no
December 27, 2016	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal executive offices) (Zip code) Christopher R.
October 20, 2016	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
October 20, 2016	N-Q	Mfs Series Trust X - MFS SERIES TRUST X GLOBAL BOND FUND N-Q MFS SERIES TRUST X GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
October 20, 2016	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d421776dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
October 20, 2016	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d416575dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
September 26, 2016	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d226417dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
September 26, 2016	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
September 23, 2016	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 September 23, 2016 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
August 9, 2016	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 August 9, 2016 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
July 28, 2016	COVER	111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 July 28, 2016 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: MFS® Series Trust X (the “Trust”) (File Nos. 33-1657 and 811-4492) on behalf of MFS® Blended Research® Growth Equity Fund, MFS® Blended Research® Small Cap Equity Fund and MFS® Blended Research® Value Equity
July 27, 2016	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1(A) Amended and Restated By-Laws and Revised Appendix A to the By-Laws Master Amended and Restated By-Laws for MFS Series Trust X, dated January 1, 2002 as revised through May 2, 2016 and Appendix A thereto, as revised through May 2, 2016 is contained in Post-Effective Amendment No.
June 23, 2016	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d182093dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
June 23, 2016	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
June 3, 2016	COVER	111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 June 3, 2016 111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 June 3, 2016 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: MFS® Series Trust X (the “Trust”) (File Nos. 33-1657 and 811-4492) on behalf of MFS® Blended Research® Mid Cap Equity Fund (the “New Fund”); Post-Effective Amendment No. 119 to the Registration Statement on Fo
April 28, 2016	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
April 28, 2016	N-Q	Mfs Series Trust X - MFS SERIES TRUST X - GLOBAL BOND FUND N-Q MFS SERIES TRUST X - GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
April 28, 2016	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, no
April 28, 2016	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d121521dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
April 26, 2016	CORRESP	111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-4340 / Fax 617-954-7723 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-4340 / Fax 617-954-7723 April 26, 2016 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
March 30, 2016	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d125311dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
March 30, 2016	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q N-Q 1 d125311dnq.htm MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal
March 30, 2016	EX-99.77D POLICIES	EX-99.77D POLICIES SUB-ITEM 77D(G) MFS Emerging Markets Debt Fund, a series of MFS Series Trust X, changed its status from a non-diversified fund to a diversified fund as described in the supplement, dated September 29, 2015, to the Fund's prospectus, as filed with the Securities Exchange Commission via EDGAR on September 29, 2015, under Rule 497 under the Securities Act of 1933.
January 28, 2016	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1(A) An Amendment, dated June 19, 2015, to the Amended and Restated Declaration of Trust of MFS Series Trust X, dated December 16, 2004, is contained in Post- Effective Amendment No.
January 28, 2016	EX-99.77C VOTES	EX-99.77C VOTES SUB-ITEM 77C The sole shareholder of the MFS Blended Research Growth Equity Fund, MFS Blended Research Small Cap Equity Fund, and MFS Blended Research Value Equity Fund (each a "Fund"), each a series of MFS Series Trust X,, took action by unanimous written consent, as permitted by the Trust's Declaration of Trust, on September 14, 2015, to approve the following matters: 1.
January 28, 2016	EX-99.77E LEGAL	EX-99.77E LEGAL SUB-ITEM 77Q1(E) The Investment Advisory Agreement, dated September 14, 2015, by and between MFS Series Trust X on behalf of its series MFS Blended Research Growth Equity Fund, MFS Blended Research Small Cap Equity Fund and MFS Blended Research Value Equity Fund, and Massachusetts Financial Services Company, is contained in Post- Effective Amendment No.
January 28, 2016	EX-99.77H CHNG CNTRL	EX-99.77H CHNG CNTRL SUB-ITEM 77H As of September 14, 2015, the following entity owned 25% or more of the voting securities of the MFS Blended Research Growth Equity Fund: - \|ENTITY \|PERCENTAGE\| - \|Massachusetts Financial Services Company\|98.
January 28, 2016	EX-99.77Q2 ITEM 405	EX-99.77Q2 ITEM 405 SUB-ITEM 77Q1(A) Appendix A, dated June 9, 2015, to the Master Amended and Restated By-Laws for MFS Series Trust X, dated January 1, 2002 as revised through November 1, 2014, is contained in Post-Effective Amendment No.
December 22, 2015	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
December 22, 2015	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, no
October 29, 2015	N-Q	Mfs Series Trust X - MFS SERIES TRUST X GLOBAL BOND FUND N-Q MFS SERIES TRUST X GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
October 29, 2015	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, no
October 29, 2015	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d39464dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under wh
October 29, 2015	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
September 25, 2015	N-Q	Mfs Series Trust X - MFS SERIES TRUST X EMERGING MARKETS DEBT LOCAL CURRENTY FUND N-Q MFS SERIES TRUST X EMERGING MARKETS DEBT LOCAL CURRENTY FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.
September 25, 2015	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d88677dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under wh
September 4, 2015	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 CORRESP 1 filename1.htm MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 September 4, 2015 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 RE: Post-Effective Amendment No. 64 to Registration Statement on Form N-1A for MFS Series Trust IV ("Trust IV") on behalf of MFS Blended Resea
July 28, 2015	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1(A) Appendix A, dated June 9, 2015, to the Master Amended and Restated By-Laws for MFS Series Trust X, dated January 1, 2002 as revised through November 1, 2014, is contained in Post-Effective Amendment No.
July 28, 2015	EX-99.77H CHNG CNTRL	EX-99.77H CHNG CNTRL SUB-ITEM 77H As of May 31, 2015, the following entity did not own 25% or more of the voting securities of the Fund: - \|PERSON/ENTITY \| - \|MFS Growth Allocation Fund\| -
June 29, 2015	COVER	111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 111 Huntington Ave., Boston, Massachusetts 02199-7632 Phone 617-954-5000 June 29, 2015 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Re: MFS® Series Trust X (the “Trust”) (File Nos. 33-1657 and 811-4492) on behalf of MFS® Blended Research Growth Equity Fund, MFS® Blended Research Small Cap Equity Fund and MFS® Blended Research Value Equity Fund
June 26, 2015	EX-99.77H CHNG CNTRL	EX-99.77H CHNG CNTRL SUB-ITEM 77H As of April 30, 2015, the following entity owned 25% or more of the voting securities of the Fund: FUND ENTITY PERCENTAGE MFS Emerging Markets Debt Local Currency Fund MFS Moderate Allocation Fund 39.
June 26, 2015	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1(A) Appendix A, dated April 30, 2015, to the Master Amended and Restated By-Laws for MFS Series Trust X, dated January 1, 2002 as revised through November 1, 2014, is contained in Post-Effective Amendment No.
June 26, 2015	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d911280dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
June 26, 2015	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q N-Q 1 d911280dnq.htm MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal
April 28, 2015	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d879236dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
April 28, 2015	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal executive offices) (Zip code) Susan S. Newto
April 28, 2015	EX-99.CERT	MFS SERIES TRUST X CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, no
April 28, 2015	N-Q	Mfs Series Trust X - MFS SERIES TRUST X GLOBAL BOND FUND N-Q N-Q 1 d879236dnq.htm MFS SERIES TRUST X GLOBAL BOND FUND N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-4492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Addre
March 30, 2015	EX-99.77Q1 OTHR EXHB	EX-99.77Q1 OTHR EXHB SUB-ITEM 77Q1(A) Master Amended and Restated By-Laws for MFS Series Trust X, dated January 1, 2002 as revised through November 1, 2014, are contained in Post-Effective Amendment No.
March 25, 2015	EX-99.CERT	MFS SERIES TRUST X EX-99.CERT 2 d862041dex99cert.htm CERTIFICATIONS EX-99.CERT MFS SERIES TRUST X CERTIFICATION I, David L. DiLorenzo, certify that: 1. I have reviewed this report on Form N-Q of MFS Series Trust X; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under w
March 25, 2015	N-Q	Mfs Series Trust X - MFS SERIES TRUST X N-Q N-Q 1 d862041dnq.htm MFS SERIES TRUST X N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04492 MFS SERIES TRUST X (Exact name of registrant as specified in charter) 111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal
March 25, 2015	CORRESP	MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 MFS® INVESTMENT MANAGEMENT 111 Huntington Avenue, Boston, Massachusetts 02199 Phone 617-954-5000 March 25, 2015 VIA EDGAR (as Correspondence) United States Securities and Exchange Commission 100 F Street, N.
January 28, 2015	EX-99.77B ACCT LTTR	EX-99.77B ACCT LTTR Report of Independent Registered Public Accounting Firm To the Shareholders of MFS Global Bond Fund and Board of Trustees of MFS Series Trust X In planning and performing our audit of the financial statements of MFS Global Bond Fund (the Fund) (one of the series constituting MFS Series Trust X) as of and for the year ended November 30, 2014, in accordance with the standards of the Public Company A

MGIAX / Mfs Series Trust X - MFS International Intrinsic Value Fund Class A - SEC-arkivering, Årsberetning, Fuldmagtserklæring

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