Quarterly Report

January 31, 2023

MFS^® Lifetime^® 2055 Fund

L55-Q3

Portfolio of Investments

1/31/23 (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%
Bond Funds – 4.9%
MFS Inflation-Adjusted Bond Fund - Class R6	633,911	$5,984,121
MFS Total Return Bond Fund - Class R6	623,381	6,003,157
		$11,987,278
International Stock Funds – 27.9%
MFS Blended Research Emerging Markets Equity Fund - Class R6	189,000	$2,407,865
MFS Blended Research International Equity Fund - Class R6	2,226,303	26,515,267
MFS Emerging Markets Equity Fund - Class R6	74,081	2,411,326
MFS International Growth Fund - Class R6	216,073	8,411,723
MFS International Intrinsic Value Fund - Class R6	217,529	8,416,191
MFS International New Discovery Fund - Class R6	308,220	9,634,966
MFS Research International Fund - Class R6	451,282	9,607,790
		$67,405,128
Specialty Funds – 10.0%
MFS Commodity Strategy Fund - Class R6	3,162,495	$12,017,479
MFS Global Real Estate Fund - Class R6	712,756	12,123,982
		$24,141,461
U.S. Stock Funds – 57.1%
MFS Blended Research Core Equity Fund - Class R6	438,672	$12,072,255
MFS Blended Research Growth Equity Fund - Class R6	895,059	13,452,736
MFS Blended Research Mid Cap Equity Fund - Class R6	1,996,083	24,312,293
MFS Blended Research Small Cap Equity Fund - Class R6	431,218	6,101,728
MFS Blended Research Value Equity Fund - Class R6	927,793	13,267,447
MFS Growth Fund - Class R6	92,601	13,327,096
MFS Mid Cap Growth Fund - Class R6 (a)	467,629	12,055,471
MFS Mid Cap Value Fund - Class R6	400,035	12,085,045
MFS New Discovery Fund - Class R6	108,178	3,059,289
MFS New Discovery Value Fund - Class R6	164,158	3,045,139
MFS Research Fund - Class R6	245,852	12,059,035
MFS Value Fund - Class R6	270,637	13,220,624
		$138,058,158
Money Market Funds – 0.1%
MFS Institutional Money Market Portfolio, 4.29% (v)	214,469	$214,491
Total Investment Companies		$241,806,516

Other Assets, Less Liabilities – 0.0%		5,983
Net Assets – 100.0%		$241,812,499

(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 $241,806,516.
(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.

Supplemental Information

1/31/23 (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. Effective September 8, 2022, and 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. 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, including commodity-linked structured notes, 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. 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 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

Supplemental Information (unaudited) – continued

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 January 31, 2023 in valuing the fund's assets and liabilities:

Financial Instruments	Level 1	Level 2	Level 3	Total
Mutual Funds	$241,806,516	$—	$—	$241,806,516

For further information regarding security characteristics, see the Portfolio of Investments. Please refer to the underlying funds’ shareholder reports 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. For the purposes of this report, the following were affiliated issuers:

Affiliated Issuers	Beginning Value	Purchases	Sales Proceeds	Realized Gain (Loss)	Change in Unrealized Appreciation or Depreciation	Ending Value
MFS Blended Research Core Equity Fund	$10,068,073	$3,849,185	$1,084,338	$(307,006)	$(453,659)	$12,072,255
MFS Blended Research Emerging Markets Equity Fund	2,051,008	811,163	484,818	(117,288)	147,800	2,407,865
MFS Blended Research Growth Equity Fund	10,936,760	4,528,029	1,272,382	(457,293)	(282,378)	13,452,736
MFS Blended Research International Equity Fund	22,391,014	6,444,186	3,470,425	(586,664)	1,737,156	26,515,267
MFS Blended Research Mid Cap Equity Fund	20,180,051	6,233,769	2,253,406	(342,847)	494,726	24,312,293
MFS Blended Research Small Cap Equity Fund	4,985,091	1,693,498	537,623	(106,197)	66,959	6,101,728
MFS Blended Research Value Equity Fund	11,162,121	3,554,869	1,289,113	(113,594)	(46,836)	13,267,447
MFS Commodity Strategy Fund	11,824,961	6,766,819	2,716,488	(172,957)	(3,684,856)	12,017,479
MFS Emerging Markets Equity Fund	2,050,488	773,408	562,860	(166,452)	316,742	2,411,326
MFS Global Real Estate Fund	10,206,748	4,380,707	974,041	(288,221)	(1,201,211)	12,123,982
MFS Growth Fund	10,931,160	4,054,503	1,272,348	(395,461)	9,242	13,327,096
MFS Inflation-Adjusted Bond Fund	5,240,023	2,098,354	754,061	(130,514)	(469,681)	5,984,121
MFS Institutional Money Market Portfolio	234,418	2,732,022	2,751,863	(104)	18	214,491
MFS International Growth Fund	7,133,979	1,917,380	991,153	(209,796)	561,313	8,411,723
MFS International Intrinsic Value Fund	7,119,649	3,009,640	966,704	(413,866)	(332,528)	8,416,191
MFS International New Discovery Fund	8,162,609	2,684,201	1,169,367	(381,884)	339,407	9,634,966
MFS Mid Cap Growth Fund	9,935,823	2,969,457	1,165,398	(312,698)	628,287	12,055,471
MFS Mid Cap Value Fund	10,116,935	2,971,769	1,201,255	(104,528)	302,124	12,085,045
MFS New Discovery Fund	2,488,472	767,339	334,451	(203,750)	341,679	3,059,289
MFS New Discovery Value Fund	2,519,938	794,850	270,911	(47,253)	48,515	3,045,139
MFS Research Fund	10,046,739	3,688,630	1,120,186	(252,222)	(303,926)	12,059,035
MFS Research International Fund	8,120,509	2,235,358	1,206,629	(198,245)	656,797	9,607,790
MFS Total Return Bond Fund	5,176,549	1,790,844	807,918	(164,272)	7,954	6,003,157
MFS Value Fund	11,126,903	3,434,178	1,249,912	(100,848)	10,303	13,220,624
	$204,210,021	$74,184,158	$29,907,650	$(5,573,960)	$(1,106,053)	$241,806,516

Affiliated Issuers	Dividend Income	Capital Gain Distributions
MFS Blended Research Core Equity Fund	$147,758	$823,745
MFS Blended Research Emerging Markets Equity Fund	77,386	—
MFS Blended Research Growth Equity Fund	19,489	280,067
MFS Blended Research International Equity Fund	501,463	210,498
MFS Blended Research Mid Cap Equity Fund	347,887	781,578
MFS Blended Research Small Cap Equity Fund	—	224,876
MFS Blended Research Value Equity Fund	158,080	831,984
MFS Commodity Strategy Fund	2,489,684	—
MFS Emerging Markets Equity Fund	34,311	—
MFS Global Real Estate Fund	76,727	591,262
MFS Growth Fund	—	129,117
MFS Inflation-Adjusted Bond Fund	341,831	—

Supplemental Information (unaudited) – continued

Affiliated Issuers − continued	Dividend Income	Capital Gain Distributions
MFS Institutional Money Market Portfolio	$4,154	$—
MFS International Growth Fund	102,203	149,772
MFS International Intrinsic Value Fund	95,755	1,009,073
MFS International New Discovery Fund	85,228	457,770
MFS Mid Cap Growth Fund	—	—
MFS Mid Cap Value Fund	190,587	405,076
MFS New Discovery Fund	—	2,557
MFS New Discovery Value Fund	46,228	168,018
MFS Research Fund	117,271	728,333
MFS Research International Fund	170,673	—
MFS Total Return Bond Fund	144,341	—
MFS Value Fund	181,140	685,556
	$5,332,196	$7,479,282