0001410368-26-040085.txt : 20260424 0001410368-26-040085.hdr.sgml : 20260424 20260424131945 ACCESSION NUMBER: 0001410368-26-040085 CONFORMED SUBMISSION TYPE: NPORT-P PUBLIC DOCUMENT COUNT: 4 CONFORMED PERIOD OF REPORT: 20260228 FILED AS OF DATE: 20260424 DATE AS OF CHANGE: 20260424 PERIOD START: 20260531 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MFS SERIES TRUST X CENTRAL INDEX KEY: 0000783740 ORGANIZATION NAME: EIN: 000000000 STATE OF INCORPORATION: MA FISCAL YEAR END: 1130 FILING VALUES: FORM TYPE: NPORT-P SEC ACT: 1940 Act SEC FILE NUMBER: 811-04492 FILM NUMBER: 26892066 BUSINESS ADDRESS: STREET 1: 111 HUNTINGTON AVENUE STREET 2: 21ST FLOOR CITY: BOSTON STATE: MA ZIP: 02199 BUSINESS PHONE: 18006372929 MAIL ADDRESS: STREET 1: 111 HUNTINGTON AVENUE STREET 2: 21ST FLOOR CITY: BOSTON STATE: MA ZIP: 02199 FORMER COMPANY: FORMER CONFORMED NAME: MFS GOVERNMENT MORTGAGE FUND DATE OF NAME CHANGE: 19930408 FORMER COMPANY: FORMER CONFORMED NAME: MFS GOVERNMENT INCOME PLUS FUND DATE OF NAME CHANGE: 19930312 FORMER COMPANY: FORMER CONFORMED NAME: MASSACHUSETTS MFS GOVERNMENT INCOME PLUS FUND DATE OF NAME CHANGE: 19921015 0000783740 S000002514 MFS Growth Allocation Fund C000006911 A MAGWX C000006912 R4 MAGJX C000006916 B MBGWX C000006917 C MCGWX C000006918 I MGWIX C000006920 R1 MAGMX C000006922 R2 MGALX C000006923 R3 MAGEX C000231061 R6 MAGQX NPORT-P 1 primary_doc.xml NPORT-P false 0000783740 XXXXXXXX S000002514 C000006920 C000006912 C000006911 C000006922 C000006918 C000006916 C000006917 C000231061 C000006923 MFS SERIES TRUST X 811-04492 0000783740 5493001MUVNRNUPJY164 111 HUNTINGTON AVENUE BOSTON 02199 617-954-5000 MFS Growth Allocation Fund S000002514 HFZEG2KP0JEQZXYL2D08 2026-05-31 2026-02-28 N 6819660900.78 1973902.91 6817686997.87 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 N MFS Emerging Markets Debt Fund 509D6AOZZ4SJ08T5BZ82 MFS Emerging Markets Debt Fund 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GRO-Q3
Quarterly Report
February 28, 2026
MFS® Growth Allocation Fund  

Portfolio of Investments
2/28/26 (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 ($)
Mutual Funds (h) – 100.0%
International Equity Funds – 21.4%
MFS Emerging Markets Equity Fund - Class R6
 
 
2,907,117
$145,791,938
MFS International Growth Fund - Class R6
 
 
4,243,718
215,750,616
MFS International Intrinsic Value Fund - Class R6
 
 
4,542,392
218,988,736
MFS International Large Cap Value Fund - Class R6
 
 
11,806,311
217,472,242
MFS International New Discovery Fund - Class R6
 
 
3,973,980
145,487,416
MFS Research International Fund - Class R6
 
 
17,873,632
511,900,808
 
 
 
$1,455,391,756
Mutual Funds – 19.5%
MFS Emerging Markets Debt Fund - Class R6
 
 
15,952,041
$205,781,335
MFS Emerging Markets Debt Local Currency Fund - Class R6
 
 
22,263,844
138,258,469
MFS Global Opportunistic Bond Fund - Class R6
 
 
24,669,915
204,760,299
MFS High Income Fund - Class R6
 
 
86,436,456
270,546,106
MFS Inflation-Adjusted Bond Fund - Class R6
 
 
36,789,088
338,827,499
MFS Total Return Bond Fund - Class R6
 
 
17,513,134
170,928,184
 
 
 
$1,329,101,892
Non-Traditional Funds – 8.3%
MFS Commodity Strategy Fund - Class R6
 
 
70,062,502
$284,453,757
MFS Global Real Estate Fund - Class R6
 
 
16,256,862
283,194,543
 
 
 
$567,648,300
U.S. Equity Funds – 49.5%
MFS Growth Fund - Class R6
 
 
3,082,957
$582,678,805
MFS Mid Cap Growth Fund - Class R6
 
 
20,360,405
579,049,914
MFS Mid Cap Value Fund - Class R6
 
 
18,625,923
628,252,392
MFS New Discovery Fund - Class R6 (a)
 
 
3,663,145
134,254,250
MFS New Discovery Value Fund - Class R6
 
 
7,561,166
137,688,844
MFS Research Fund - Class R6
 
 
11,045,014
618,078,972
MFS Value Fund - Class R6
 
 
13,110,775
694,871,090
 
 
 
$3,374,874,267
Money Market Funds – 1.3%
MFS Institutional Money Market Portfolio, 3.7% (v)
 
 
87,090,655
$87,099,364
Total Mutual Funds
$6,814,115,579
 
Other Assets, Less Liabilities – 0.0%
2,749,848
Net Assets – 100.0%
$6,816,865,427
(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 value of the fund’s investments in affiliated issuers was $6,814,115,579.
(v)
Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the
annualized seven-day yield of the fund at period end.
See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.
1

Supplemental Information
2/28/26 (unaudited)
The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial
Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.
(1) Investment Valuations
Open-end investment companies (underlying funds) are generally valued at their net asset value per share. The investments of underlying funds managed by the adviser are valued as described below. For purposes of this policy disclosure, fund also refers to the underlying funds in which the fund-of-funds invests.
Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.
Under the fund's valuation policy and procedures, equity securities, including restricted equity securities and equity securities sold short, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Equity securities sold short, for which there were no sales reported that day,
are generally valued at the last quoted daily ask quotation on their primary market or exchange as provided by a third-party pricing service. Debt instruments and floating rate loans, including restricted debt instruments, are generally valued at an evaluated or composite bid as
provided by a third-party pricing service. Debt instruments sold short are generally valued at an evaluated or composite mean as provided by
a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which
approximates market value. Exchange-traded options are generally valued at the last sale or official closing price on their primary exchange as provided by a third-party pricing service. Exchange-traded options for which there were no sales reported that day are generally valued at the last daily bid quotation on their primary exchange as provided by a third-party pricing service. For put options, the position may be valued at the last daily ask quotation if there are no trades reported during the day. Options not traded on an exchange are generally valued
at a broker/dealer bid quotation. Foreign currency options are generally valued at valuations provided by a third-party pricing service. Futures contracts are generally valued at last posted settlement price on their primary exchange as provided by a third-party pricing service. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation on their primary
exchange as provided by a third-party pricing service. Forward foreign currency exchange contracts are generally valued at the mean of bid
and asked prices for the time period interpolated from rates provided by a third-party pricing service for proximate time periods. Swap agreements are generally valued using valuations provided by a third-party pricing service, which for cleared swaps includes an evaluation of
any trading activity at the clearinghouses. Open-end investment companies are generally valued at net asset value per share. Funds traded on a recognized securities exchange (such as Exchange Traded Funds or Closed End Funds) are generally valued at the official closing price on their primary market or exchange as provided by a third-party pricing service. If no sales are reported that day for these funds, generally
they will be valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.
Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. Pricing services generally value debt instruments assuming orderly transactions of institutional round lot sizes, but a fund may hold or transact in such securities in smaller, odd lot sizes. In instances where a fund holds an odd lot size position in a debt instrument, such position will typically be valued using the pricing agent’s institutional round lot price for the debt instrument. Odd lots may trade at lower prices than institutional round lots, and the fund may receive different prices when it sells odd lot positions than it would receive for sales of institutional round lot positions. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an
2

Supplemental Information (unaudited) – continued
investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned
to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.
Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of February 28, 2026 in valuing the fund's assets and liabilities:
Financial Instruments
Level 1
Level 2
Level 3
Total
Investment Companies
$6,814,115,579
$
$
$6,814,115,579
For further information regarding security characteristics, see the Portfolio of Investments. Please refer to the underlying funds’ financial
statements for further information regarding the levels used in valuing the underlying funds’ assets and liabilities.
(2) Investments in Affiliated Issuers
An affiliated issuer 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. The following were affiliated issuers for the period ended February 28, 2026:
Affiliated Issuers
Beginning
Value
Purchases
Sales
Proceeds
Realized
Gain
(Loss)
Change in
Unrealized
Appreciation or
Depreciation
Ending
Value
MFS Commodity Strategy Fund
$240,515,293
$55,965,710
$42,679,890
$(2,489,763
)
$33,142,407
$284,453,757
MFS Emerging Markets Debt Fund
178,093,410
25,909,395
13,730,631
(2,225,284
)
17,734,445
205,781,335
MFS Emerging Markets Debt Local Currency Fund
122,517,600
10,796,833
8,286,391
(1,433,526
)
14,663,953
138,258,469
MFS Emerging Markets Equity Fund
132,921,498
3,655,028
29,398,605
1,834,942
36,779,076
145,791,938
MFS Global Opportunistic Bond Fund
174,990,523
31,826,307
6,112,939
(878,376
)
4,934,784
204,760,299
MFS Global Real Estate Fund
262,140,708
13,214,575
8,054,046
(9,085
)
15,902,391
283,194,543
MFS Growth Fund
636,309,781
83,269,338
98,224,789
15,665,082
(54,340,607
)
582,678,805
MFS High Income Fund
241,423,266
35,653,507
9,707,538
(968,590
)
4,145,461
270,546,106
MFS Inflation-Adjusted Bond Fund
289,745,361
56,137,365
9,317,694
(1,300,497
)
3,562,964
338,827,499
MFS Institutional Money Market Portfolio
114,443,206
110,373,106
137,726,990
(1,401
)
11,443
87,099,364
MFS International Growth Fund
200,612,066
11,793,979
15,464,172
6,220,421
12,588,322
215,750,616
MFS International Intrinsic Value Fund
202,730,315
17,104,192
31,316,577
4,113,789
26,357,017
218,988,736
MFS International Large Cap Value Fund
205,347,669
17,183,348
39,762,962
5,215,133
29,489,054
217,472,242
MFS International New Discovery Fund
133,429,083
4,710,281
6,237,491
467,563
13,117,980
145,487,416
MFS Mid Cap Growth Fund
612,451,726
83,886,707
50,115,339
9,594,455
(76,767,635
)
579,049,914
MFS Mid Cap Value Fund
590,208,304
47,779,191
60,750,727
(277,923
)
51,293,547
628,252,392
MFS New Discovery Fund
134,658,702
748,753
26,581,390
2,694,504
22,733,681
134,254,250
MFS New Discovery Value Fund
131,075,750
14,188,204
16,715,869
303,230
8,837,529
137,688,844
MFS Research Fund
619,263,870
88,755,556
80,047,490
10,112,282
(20,005,247
)
618,078,972
MFS Research International Fund
472,324,856
27,945,280
50,677,029
10,093,875
52,213,826
511,900,808
MFS Total Return Bond Fund
145,295,173
26,001,062
5,816,016
(628,164
)
6,076,129
170,928,184
MFS Value Fund
646,761,497
59,951,341
48,975,328
1,447,853
35,685,727
694,871,090
 
$6,487,259,657
$826,849,058
$795,699,903
$57,550,520
$238,156,247
$6,814,115,579
Affiliated Issuers
Dividend
Income
Capital Gain
Distributions
MFS Commodity Strategy Fund
$37,962,706
$
MFS Emerging Markets Debt Fund
7,704,937
MFS Emerging Markets Debt Local Currency Fund
3,155,509
MFS Emerging Markets Equity Fund
3,592,812
MFS Global Opportunistic Bond Fund
7,494,535
3

Supplemental Information (unaudited) – continued
Affiliated Issuers − continued
Dividend
Income
Capital Gain
Distributions
MFS Global Real Estate Fund
$8,581,946
$
MFS Growth Fund
80,587,620
MFS High Income Fund
13,025,615
MFS Inflation-Adjusted Bond Fund
12,972,684
MFS Institutional Money Market Portfolio
3,088,421
MFS International Growth Fund
2,690,477
8,371,706
MFS International Intrinsic Value Fund
4,142,775
12,530,367
MFS International Large Cap Value Fund
7,768,822
8,892,827
MFS International New Discovery Fund
2,528,531
1,951,577
MFS Mid Cap Growth Fund
74,602,710
MFS Mid Cap Value Fund
9,632,931
36,847,769
MFS New Discovery Fund
MFS New Discovery Value Fund
4,654,447
8,825,291
MFS Research Fund
4,914,258
83,372,802
MFS Research International Fund
10,916,417
15,279,697
MFS Total Return Bond Fund
5,325,554
MFS Value Fund
9,328,120
48,984,883
 
$159,481,497
$380,247,249
4