# EDGAR Filing Document

**Accession Number:** 0000783740
**File Stem:** 0001752724-23-011792
**Filing Date:** 2023-1
**Character Count:** 49102
**Document Hash:** 4885d4281f378b2b52aa411e5c688a80
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-23-011792.hdr.sgml**: 20230125

**ACCESSION NUMBER**: 0001752724-23-011792

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20221130

**FILED AS OF DATE**: 20230125

**DATE AS OF CHANGE**: 20230125

**PERIOD START**: 20230531

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST X
- **CENTRAL INDEX KEY:** 0000783740
- **IRS NUMBER:** 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:** 23550821

**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

## Series and Classes Contracts Data

### MFS Blended Research Mid Cap Equity Fund (Series ID: S000054892)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000172715 | A            | BMSFX           |
| C000172716 | B            | BMSBX           |
| C000172717 | C            | BMSDX           |
| C000172718 | I            | BMSLX           |
| C000172719 | R1           | BMSRX           |
| C000172720 | R2           | BMSSX           |
| C000172721 | R3           | BMSTX           |
| C000172722 | R4           | BMSVX           |
| C000172723 | R6           | BMSYX           |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** MFS Series Trust X

- **b. Investment Company Act file number:** 811-04492

- **c. CIK number of Registrant:** 0000783740

- **d. LEI of Registrant:** 5493001MUVNRNUPJY164

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 111 Huntington Avenue

  - **City:** Boston

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02199

  - **Telephone number:** 617-954-5000

**Item A.2. Information about the Series.**

- **a. Name of Series:** MFS Blended Research Mid Cap Equity Fund

- **b. EDGAR series identifier (if any):** S000054892

- **c. LEI of Series:** 549300CJNZTXTE7DBK33

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2023-05-31

- **b. Date as of which information is reported:** 2022-11-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $495968009.52

**Total Liabilities:** $616749.18

**Net Assets:** $495351260.34

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000172716 | -8.12%               | 11.18%               | 2.96%                |
| Class ID C000172720 | -8.05%               | 11.17%               | 3.02%                |
| Class ID C000172718 | -8.01%               | 11.20%               | 3.08%                |
| Class ID C000172721 | -8.10%               | 11.22%               | 3.00%                |
| Class ID C000172723 | -8.07%               | 11.37%               | 3.07%                |
| Class ID C000172717 | -8.12%               | 11.19%               | 2.96%                |
| Class ID C000172719 | -8.11%               | 11.17%               | 2.96%                |
| Class ID C000172715 | -8.05%               | 11.24%               | 2.98%                |
| Class ID C000172722 | -8.08%               | 11.29%               | 3.08%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-1341259.63             | $-34677706.47                              |
| Month 2  | $-682546.83              | $46258916.25                               |
| Month 3  | $-2845645.38             | $16951922.41                               |

### Schedule of Portfolio Investments

| Name                                          | Title                                             | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Host Hotels & Resorts, Inc.                   | Host Hotels & Resorts, Inc.                       | CUSIP: 44107P104<br>LEI: N6EL63S0K3PB1YFTDI24 | Long             | EC               | CORP              | US        |    176483 | NS      | $3342588.02   | 0.67%             |  |  |  | No            |                  1 | On Loan: No      |
| Cadence Design Systems, Inc.                  | Cadence Design Systems, Inc.                      | CUSIP: 127387108<br>LEI: GCT7RXJOGLXPV0NXZY22 | Long             | EC               | CORP              | US        |     52378 | NS      | $9011111.12   | 1.82%             |  |  |  | No            |                  1 | On Loan: No      |
| Archer-Daniels-Midland Co.                    | Archer-Daniels-Midland Co.                        | CUSIP: 039483102<br>LEI: 549300LO13MQ9HYSTR83 | Long             | EC               | CORP              | US        |     72630 | NS      | $7081425.00   | 1.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Vulcan Materials Co.                          | Vulcan Materials Co.                              | CUSIP: 929160109<br>LEI: 549300Q8LSNHAVWBNI21 | Long             | EC               | CORP              | US        |      5400 | NS      | $989982.00    | 0.20%             |  |  |  | No            |                  1 | On Loan: No      |
| Zions Bancorp NA                              | Zions Bancorp NA                                  | CUSIP: 989701107<br>LEI: 8WH0EE09O9V05QJZ3V89 | Long             | EC               | CORP              | US        |    118923 | NS      | $6162589.86   | 1.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Valero Energy Corp.                           | Valero Energy Corp.                               | CUSIP: 91913Y100<br>LEI: 549300XTO5VR8SKV1V74 | Long             | EC               | CORP              | US        |     61576 | NS      | $8227785.12   | 1.66%             |  |  |  | No            |                  1 | On Loan: No      |
| Crowdstrike Holdings, Inc.                    | Crowdstrike Holdings, Inc., Class A               | CUSIP: 22788C105<br>LEI: 549300YBY08K9KM4HX32 | Long             | EC               | CORP              | US        |     42578 | NS      | $5009301.70   | 1.01%             |  |  |  | No            |                  1 | On Loan: No      |
| AMETEK, Inc.                                  | AMETEK, Inc.                                      | CUSIP: 031100100<br>LEI: 549300WZDEF9KKE40E98 | Long             | EC               | CORP              | US        |     20126 | NS      | $2866344.92   | 0.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Polaris, Inc.                                 | Polaris, Inc.                                     | CUSIP: 731068102<br>LEI: 549300QJSN8UVWN1EI78 | Long             | EC               | CORP              | US        |     42450 | NS      | $4841847.00   | 0.98%             |  |  |  | No            |                  1 | On Loan: No      |
| CoStar Group, Inc.                            | CoStar Group, Inc.                                | CUSIP: 22160N109<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     27491 | NS      | $2227870.64   | 0.45%             |  |  |  | No            |                  1 | On Loan: No      |
| PG&E Corp.                                    | PG&E Corp.                                        | CUSIP: 69331C108<br>LEI: 8YQ2GSDWYZXO2EDN3511 | Long             | EC               | CORP              | US        |    516619 | NS      | $8110918.30   | 1.64%             |  |  |  | No            |                  1 | On Loan: No      |
| EPR Properties                                | EPR Properties                                    | CUSIP: 26884U109<br>LEI: 549300YSSXFHMPOWZ492 | Long             | EC               | CORP              | US        |     83616 | NS      | $3479261.76   | 0.70%             |  |  |  | No            |                  1 | On Loan: No      |
| Timken Co. (The)                              | Timken Co. (The)                                  | CUSIP: 887389104<br>LEI: B0I35MLPFXZSE70ASS73 | Long             | EC               | CORP              | US        |     46990 | NS      | $3570300.20   | 0.72%             |  |  |  | No            |                  1 | On Loan: No      |
| Syneos Health, Inc.                           | Syneos Health, Inc.                               | CUSIP: 87166B102<br>LEI: 549300F1ZGKDS8P6GU13 | Long             | EC               | CORP              | US        |    115899 | NS      | $4088916.72   | 0.83%             |  |  |  | No            |                  1 | On Loan: No      |
| nVent Electric plc                            | nVent Electric plc                                | CUSIP: N/A<br>LEI: N/A                        | Long             | EC               | CORP              | IE        |     41921 | NS      | $1677259.21   | 0.34%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Institutional Money Market Portfolio      | MFS Institutional Money Market Portfolio, Class A | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | STIV             | RF                | US        |   4112905 | NS      | $4112905.32   | 0.83%             |  |  |  | No            |                  1 | On Loan: No      |
| Medpace Holdings, Inc.                        | Medpace Holdings, Inc.                            | CUSIP: 58506Q109<br>LEI: 549300H8TYEUVTW14A54 | Long             | EC               | CORP              | US        |     33114 | NS      | $6950297.46   | 1.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Cummins, Inc.                                 | Cummins, Inc.                                     | CUSIP: 231021106<br>LEI: ZUNI8PYC725B6H8JU438 | Long             | EC               | CORP              | US        |      4239 | NS      | $1064667.24   | 0.21%             |  |  |  | No            |                  1 | On Loan: No      |
| Marriott International, Inc.                  | Marriott International, Inc., Class A             | CUSIP: 571903202<br>LEI: 225YDZ14ZO8E1TXUSU86 | Long             | EC               | CORP              | US        |     35337 | NS      | $5842972.95   | 1.18%             |  |  |  | No            |                  1 | On Loan: No      |
| Biogen, Inc.                                  | Biogen, Inc.                                      | CUSIP: 09062X103<br>LEI: W8J5WZB5IY3K0NDQT671 | Long             | EC               | CORP              | US        |     24175 | NS      | $7377484.75   | 1.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Saia, Inc.                                    | Saia, Inc.                                        | CUSIP: 78709Y105<br>LEI: 549300WNPG4N9GBOYB29 | Long             | EC               | CORP              | US        |      7923 | NS      | $1929963.57   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Republic Services, Inc.                       | Republic Services, Inc.                           | CUSIP: 760759100<br>LEI: NKNQHM6BLECKVOQP7O46 | Long             | EC               | CORP              | US        |     25965 | NS      | $3616664.85   | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| Everest Re Group Ltd.                         | Everest Re Group Ltd.                             | CUSIP: N/A<br>LEI: 549300N24XF2VV0B3570       | Long             | EC               | CORP              | BM        |     26350 | NS      | $8904719.00   | 1.80%             |  |  |  | No            |                  1 | On Loan: No      |
| Apple Hospitality REIT, Inc.                  | Apple Hospitality REIT, Inc.                      | CUSIP: 03784Y200<br>LEI: 549300EVZAR0FBZO4F16 | Long             | EC               | CORP              | US        |     72394 | NS      | $1235041.64   | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| Spirit Realty Capital, Inc.                   | Spirit Realty Capital, Inc.                       | CUSIP: 84860W300<br>LEI: 549300LTU6LVPZSHMJ25 | Long             | EC               | CORP              | US        |     17128 | NS      | $709441.76    | 0.14%             |  |  |  | No            |                  1 | On Loan: No      |
| Southwest Airlines Co.                        | Southwest Airlines Co.                            | CUSIP: 844741108<br>LEI: UDTZ87G0STFETI6HGH41 | Long             | EC               | CORP              | US        |     59491 | NS      | $2374285.81   | 0.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Toll Brothers, Inc.                           | Toll Brothers, Inc.                               | CUSIP: 889478103<br>LEI: 529900JB6IS9MSZGVR44 | Long             | EC               | CORP              | US        |     86989 | NS      | $4167642.99   | 0.84%             |  |  |  | No            |                  1 | On Loan: No      |
| Life Storage, Inc.                            | Life Storage, Inc.                                | CUSIP: 53223X107<br>LEI: W9EE01AFDDF9DQCQZC68 | Long             | EC               | CORP              | US        |     52061 | NS      | $5596036.89   | 1.13%             |  |  |  | No            |                  1 | On Loan: No      |
| Dropbox, Inc.                                 | Dropbox, Inc., Class A                            | CUSIP: 26210C104<br>LEI: 549300JCDF7UAR6TJR51 | Long             | EC               | CORP              | US        |    305983 | NS      | $7208959.48   | 1.46%             |  |  |  | No            |                  1 | On Loan: No      |
| Gartner, Inc.                                 | Gartner, Inc.                                     | CUSIP: 366651107<br>LEI: PP55B5R38BFB8O8HH686 | Long             | EC               | CORP              | US        |     25735 | NS      | $9016771.95   | 1.82%             |  |  |  | No            |                  1 | On Loan: No      |
| Cheniere Energy, Inc.                         | Cheniere Energy, Inc.                             | CUSIP: 16411R208<br>LEI: MIHC87W9WTYSYZWV1J40 | Long             | EC               | CORP              | US        |     45709 | NS      | $8015530.24   | 1.62%             |  |  |  | No            |                  1 | On Loan: No      |
| Univar Solutions, Inc.                        | Univar Solutions, Inc.                            | CUSIP: 91336L107<br>LEI: 549300VSXHFQVR770L55 | Long             | EC               | CORP              | US        |    140284 | NS      | $4647608.92   | 0.94%             |  |  |  | No            |                  1 | On Loan: No      |
| Albertsons Cos., Inc.                         | Albertsons Cos., Inc., Class A                    | CUSIP: 013091103<br>LEI: 549300YKWOC0AOR16R51 | Long             | EC               | CORP              | US        |    182160 | NS      | $3816252.00   | 0.77%             |  |  |  | No            |                  1 | On Loan: No      |
| UGI Corp.                                     | UGI Corp.                                         | CUSIP: 902681105<br>LEI: DX6GCWD4Q1JO9CRE5I40 | Long             | EC               | CORP              | US        |    157076 | NS      | $6070987.40   | 1.23%             |  |  |  | No            |                  1 | On Loan: No      |
| DTE Energy Co.                                | DTE Energy Co.                                    | CUSIP: 233331107<br>LEI: 549300IX8SD6XXD71I78 | Long             | EC               | CORP              | US        |      3966 | NS      | $460095.66    | 0.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Equitable Holdings, Inc.                      | Equitable Holdings, Inc.                          | CUSIP: 29452E101<br>LEI: 549300FIBAKMNHPZ4009 | Long             | EC               | CORP              | US        |    135678 | NS      | $4306419.72   | 0.87%             |  |  |  | No            |                  1 | On Loan: No      |
| TripAdvisor, Inc.                             | TripAdvisor, Inc.                                 | CUSIP: 896945201<br>LEI: 549300XVG45PT5BART17 | Long             | EC               | CORP              | US        |     16817 | NS      | $342898.63    | 0.07%             |  |  |  | No            |                  1 | On Loan: No      |
| Regions Financial Corp.                       | Regions Financial Corp.                           | CUSIP: 7591EP100<br>LEI: CW05CS5KW59QTC0DG824 | Long             | EC               | CORP              | US        |     35786 | NS      | $830593.06    | 0.17%             |  |  |  | No            |                  1 | On Loan: No      |
| Lululemon Athletica, Inc.                     | Lululemon Athletica, Inc.                         | CUSIP: 550021109<br>LEI: 549300D9GZ4BMLDW5T40 | Long             | EC               | CORP              | US        |     12193 | NS      | $4637119.83   | 0.94%             |  |  |  | No            |                  1 | On Loan: No      |
| LKQ Corp.                                     | LKQ Corp.                                         | CUSIP: 501889208<br>LEI: DS830JTTZQN6GK0I2E41 | Long             | EC               | CORP              | US        |     35672 | NS      | $1938059.76   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Raymond James Financial, Inc.                 | Raymond James Financial, Inc.                     | CUSIP: 754730109<br>LEI: RGUZHJ05YTITL6D76949 | Long             | EC               | CORP              | US        |     65047 | NS      | $7603994.30   | 1.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Box, Inc.                                     | Box, Inc., Class A                                | CUSIP: 10316T104<br>LEI: 549300KQUCPD8687YS68 | Long             | EC               | CORP              | US        |     80127 | NS      | $2199486.15   | 0.44%             |  |  |  | No            |                  1 | On Loan: No      |
| Hartford Financial Services Group, Inc. (The) | Hartford Financial Services Group, Inc. (The)     | CUSIP: 416515104<br>LEI: IU7C3FTM7Y3BQM112U94 | Long             | EC               | CORP              | US        |    105158 | NS      | $8030916.46   | 1.62%             |  |  |  | No            |                  1 | On Loan: No      |
| QuidelOrtho Corp.                             | QuidelOrtho Corp.                                 | CUSIP: 219798105<br>LEI: 549300YU8CMO9HF53113 | Long             | EC               | CORP              | US        |     12467 | NS      | $1092233.87   | 0.22%             |  |  |  | No            |                  1 | On Loan: No      |
| International Game Technology plc             | International Game Technology plc                 | CUSIP: N/A<br>LEI: 549300UQ6KHRCZDRGZ76       | Long             | EC               | CORP              | GB        |    220004 | NS      | $5398898.16   | 1.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Visteon Corp.                                 | Visteon Corp.                                     | CUSIP: 92839U206<br>LEI: 549300MOVLYHRW4GGW78 | Long             | EC               | CORP              | US        |     17388 | NS      | $2552558.40   | 0.52%             |  |  |  | No            |                  1 | On Loan: No      |
| Paylocity Holding Corp.                       | Paylocity Holding Corp.                           | CUSIP: 70438V106<br>LEI: 549300VH75FTB4DIEE07 | Long             | EC               | CORP              | US        |      2309 | NS      | $502969.47    | 0.10%             |  |  |  | No            |                  1 | On Loan: No      |
| Westinghouse Air Brake Technologies Corp.     | Westinghouse Air Brake Technologies Corp.         | CUSIP: 929740108<br>LEI: 06BTX5UWZD0GQ5N5Y745 | Long             | EC               | CORP              | US        |     39100 | NS      | $3952619.00   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| Exelixis, Inc.                                | Exelixis, Inc.                                    | CUSIP: 30161Q104<br>LEI: 254900PJQB59O2O95R37 | Long             | EC               | CORP              | US        |    152303 | NS      | $2601335.24   | 0.53%             |  |  |  | No            |                  1 | On Loan: No      |
| Lincoln National Corp.                        | Lincoln National Corp.                            | CUSIP: 534187109<br>LEI: EFQMQROEDSNBRIP7LE47 | Long             | EC               | CORP              | US        |     26196 | NS      | $1020072.24   | 0.21%             |  |  |  | No            |                  1 | On Loan: No      |
| Hologic, Inc.                                 | Hologic, Inc.                                     | CUSIP: 436440101<br>LEI: 549300DYP6F5ZJL0LB74 | Long             | EC               | CORP              | US        |    101240 | NS      | $7710438.40   | 1.56%             |  |  |  | No            |                  1 | On Loan: No      |
| Enphase Energy, Inc.                          | Enphase Energy, Inc.                              | CUSIP: 29355A107<br>LEI: 5493008U7KIGMI59Z314 | Long             | EC               | CORP              | US        |      7589 | NS      | $2432957.51   | 0.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Amkor Technology, Inc.                        | Amkor Technology, Inc.                            | CUSIP: 031652100<br>LEI: 529900VHLRTKPWZJBM84 | Long             | EC               | CORP              | US        |    126420 | NS      | $3542288.40   | 0.72%             |  |  |  | No            |                  1 | On Loan: No      |
| ROBLOX Corp.                                  | ROBLOX Corp., Class A                             | CUSIP: 771049103<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     98938 | NS      | $3143260.26   | 0.63%             |  |  |  | No            |                  1 | On Loan: No      |
| Builders FirstSource, Inc.                    | Builders FirstSource, Inc.                        | CUSIP: 12008R107<br>LEI: 549300W0SKP6L3H7DP63 | Long             | EC               | CORP              | US        |    114349 | NS      | $7310331.57   | 1.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Ashland Global Holdings, Inc.                 | Ashland Global Holdings, Inc.                     | CUSIP: 044186104<br>LEI: 529900E4L9R04SB8HB11 | Long             | EC               | CORP              | US        |      4714 | NS      | $527355.18    | 0.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Brunswick Corp.                               | Brunswick Corp.                                   | CUSIP: 117043109<br>LEI: YM4O38W15AX4YLLQKU27 | Long             | EC               | CORP              | US        |     79966 | NS      | $5933477.20   | 1.20%             |  |  |  | No            |                  1 | On Loan: No      |
| Corteva, Inc.                                 | Corteva, Inc.                                     | CUSIP: 22052L104<br>LEI: 549300WZN9I2QKLS0O94 | Long             | EC               | CORP              | US        |    123259 | NS      | $8278074.44   | 1.67%             |  |  |  | No            |                  1 | On Loan: No      |
| AutoZone, Inc.                                | AutoZone, Inc.                                    | CUSIP: 053332102<br>LEI: GA3JGKJ41LJKXDN23E90 | Long             | EC               | CORP              | US        |      2185 | NS      | $5635115.00   | 1.14%             |  |  |  | No            |                  1 | On Loan: No      |
| Fox Corp.                                     | Fox Corp., Class B                                | CUSIP: 35137L204<br>LEI: 549300DDU6FDRBIELS05 | Long             | EC               | CORP              | US        |     57694 | NS      | $1760820.88   | 0.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Live Nation Entertainment, Inc.               | Live Nation Entertainment, Inc.                   | CUSIP: 538034109<br>LEI: 5493007B9BM9ZXJINO78 | Long             | EC               | CORP              | US        |     48044 | NS      | $3495681.44   | 0.71%             |  |  |  | No            |                  1 | On Loan: No      |
| McKesson Corp.                                | McKesson Corp.                                    | CUSIP: 58155Q103<br>LEI: 549300WZWOM80UCFSF54 | Long             | EC               | CORP              | US        |     20431 | NS      | $7798104.08   | 1.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Amdocs Ltd.                                   | Amdocs Ltd.                                       | CUSIP: N/A<br>LEI: 549300HQV672RJ7RQV66       | Long             | EC               | CORP              | GG        |     34559 | NS      | $3070912.74   | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| United Airlines Holdings, Inc.                | United Airlines Holdings, Inc.                    | CUSIP: 910047109<br>LEI: 98450079DA0B78DD6764 | Long             | EC               | CORP              | US        |     77841 | NS      | $3438236.97   | 0.69%             |  |  |  | No            |                  1 | On Loan: No      |
| WEX, Inc.                                     | WEX, Inc.                                         | CUSIP: 96208T104<br>LEI: T9M5IGROL1TL1G5OV478 | Long             | EC               | CORP              | US        |     20613 | NS      | $3486482.82   | 0.70%             |  |  |  | No            |                  1 | On Loan: No      |
| GoDaddy, Inc.                                 | GoDaddy, Inc., Class A                            | CUSIP: 380237107<br>LEI: 549300J8H1TB0I2CB447 | Long             | EC               | CORP              | US        |     87304 | NS      | $6908365.52   | 1.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Fortinet, Inc.                                | Fortinet, Inc.                                    | CUSIP: 34959E109<br>LEI: 549300O0QJWDBAS0QX03 | Long             | EC               | CORP              | US        |      4082 | NS      | $216999.12    | 0.04%             |  |  |  | No            |                  1 | On Loan: No      |
| Beam Therapeutics, Inc.                       | Beam Therapeutics, Inc.                           | CUSIP: 07373V105<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     20577 | NS      | $950451.63    | 0.19%             |  |  |  | No            |                  1 | On Loan: No      |
| Motorola Solutions, Inc.                      | Motorola Solutions, Inc.                          | CUSIP: 620076307<br>LEI: 6S552MUG6KGJVEBSEC55 | Long             | EC               | CORP              | US        |      6799 | NS      | $1850687.80   | 0.37%             |  |  |  | No            |                  1 | On Loan: No      |
| Lumen Technologies, Inc.                      | Lumen Technologies, Inc.                          | CUSIP: 550241103<br>LEI: 8M3THTGWLTYZVE6BBY25 | Long             | EC               | CORP              | US        |    209779 | NS      | $1147491.13   | 0.23%             |  |  |  | No            |                  1 | On Loan: No      |
| Ulta Beauty, Inc.                             | Ulta Beauty, Inc.                                 | CUSIP: 90384S303<br>LEI: 529900CIV6HN8M28YM82 | Long             | EC               | CORP              | US        |      7721 | NS      | $3589029.64   | 0.72%             |  |  |  | No            |                  1 | On Loan: No      |
| Eagle Materials, Inc.                         | Eagle Materials, Inc.                             | CUSIP: 26969P108<br>LEI: 529900KRXRGXL61SG039 | Long             | EC               | CORP              | US        |     23756 | NS      | $3238893.04   | 0.65%             |  |  |  | No            |                  1 | On Loan: No      |
| Expedia Group, Inc.                           | Expedia Group, Inc.                               | CUSIP: 30212P303<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     71819 | NS      | $7673141.96   | 1.55%             |  |  |  | No            |                  1 | On Loan: No      |
| Corning, Inc.                                 | Corning, Inc.                                     | CUSIP: 219350105<br>LEI: 549300X2937PB0CJ7I56 | Long             | EC               | CORP              | US        |    186103 | NS      | $6351695.39   | 1.28%             |  |  |  | No            |                  1 | On Loan: No      |
| Silicon Laboratories, Inc.                    | Silicon Laboratories, Inc.                        | CUSIP: 826919102<br>LEI: 4PRDF8Q9TDHRVZKZSZ47 | Long             | EC               | CORP              | US        |     27227 | NS      | $3959894.88   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| Huntington Ingalls Industries, Inc.           | Huntington Ingalls Industries, Inc.               | CUSIP: 446413106<br>LEI: 5TZLZ6WJTBVJ0QWBG121 | Long             | EC               | CORP              | US        |     23087 | NS      | $5355260.52   | 1.08%             |  |  |  | No            |                  1 | On Loan: No      |
| NiSource, Inc.                                | NiSource, Inc.                                    | CUSIP: 65473P105<br>LEI: 549300D8GOWWH0SJB189 | Long             | EC               | CORP              | US        |     10797 | NS      | $301668.18    | 0.06%             |  |  |  | No            |                  1 | On Loan: No      |
| Constellation Energy Corp.                    | Constellation Energy Corp.                        | CUSIP: 21037T109<br>LEI: 549300F8Y20RYGNGV346 | Long             | EC               | CORP              | US        |     18173 | NS      | $1746788.76   | 0.35%             |  |  |  | No            |                  1 | On Loan: No      |
| NOV, Inc.                                     | NOV, Inc.                                         | CUSIP: 62955J103<br>LEI: 549300EHF3IW1AR6U008 | Long             | EC               | CORP              | US        |    258539 | NS      | $5806785.94   | 1.17%             |  |  |  | No            |                  1 | On Loan: No      |
| AGCO Corp.                                    | AGCO Corp.                                        | CUSIP: 001084102<br>LEI: LYOM0B2GCF1JWXK5ZG04 | Long             | EC               | CORP              | US        |     18054 | NS      | $2396126.88   | 0.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Chemours Co. (The)                            | Chemours Co. (The)                                | CUSIP: 163851108<br>LEI: 549300M1BOLNXL8DOV14 | Long             | EC               | CORP              | US        |    148318 | NS      | $4605273.90   | 0.93%             |  |  |  | No            |                  1 | On Loan: No      |
| Dillard's, Inc.                               | Dillard's, Inc., Class A                          | CUSIP: 254067101<br>LEI: 529900FGYKMWL6019P91 | Long             | EC               | CORP              | US        |      9938 | NS      | $3574698.60   | 0.72%             |  |  |  | No            |                  1 | On Loan: No      |
| Atlassian Corp. plc                           | Atlassian Corp. plc, Class A                      | CUSIP: 049468101<br>LEI: 549300V7ZY5P02D2MY38 | Long             | EC               | CORP              | US        |      9820 | NS      | $1291821.00   | 0.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Beacon Roofing Supply, Inc.                   | Beacon Roofing Supply, Inc.                       | CUSIP: 073685109<br>LEI: 549300HDXQWWCBOYXP31 | Long             | EC               | CORP              | US        |     63172 | NS      | $3688613.08   | 0.74%             |  |  |  | No            |                  1 | On Loan: No      |
| Tyson Foods, Inc.                             | Tyson Foods, Inc., Class A                        | CUSIP: 902494103<br>LEI: WD6L6041MNRW1JE49D58 | Long             | EC               | CORP              | US        |     11889 | NS      | $788002.92    | 0.16%             |  |  |  | No            |                  1 | On Loan: No      |
| Reliance Steel & Aluminum Co.                 | Reliance Steel & Aluminum Co.                     | CUSIP: 759509102<br>LEI: 549300E287ZOFT3C5Z56 | Long             | EC               | CORP              | US        |     12608 | NS      | $2663944.32   | 0.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Vistra Corp.                                  | Vistra Corp.                                      | CUSIP: 92840M102<br>LEI: 549300KP43CPCUJOOG15 | Long             | EC               | CORP              | US        |    258573 | NS      | $6291081.09   | 1.27%             |  |  |  | No            |                  1 | On Loan: No      |
| Organon & Co.                                 | Organon & Co.                                     | CUSIP: 68622V106<br>LEI: 549300AMCKY57OK2CO56 | Long             | EC               | CORP              | US        |    199198 | NS      | $5183131.96   | 1.05%             |  |  |  | No            |                  1 | On Loan: No      |
| Ingersoll Rand, Inc.                          | Ingersoll Rand, Inc.                              | CUSIP: 45687V106<br>LEI: 5299004C02FMZCUOIR50 | Long             | EC               | CORP              | US        |     32859 | NS      | $1773400.23   | 0.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Maravai LifeSciences Holdings, Inc.           | Maravai LifeSciences Holdings, Inc., Class A      | CUSIP: 56600D107<br>LEI: N/A                  | Long             | EC               | CORP              | US        |    123573 | NS      | $1838766.24   | 0.37%             |  |  |  | No            |                  1 | On Loan: No      |
| Zebra Technologies Corp.                      | Zebra Technologies Corp., Class A                 | CUSIP: 989207105<br>LEI: PO0I32GKZ3HZMMDPZZ08 | Long             | EC               | CORP              | US        |     12452 | NS      | $3365526.56   | 0.68%             |  |  |  | No            |                  1 | On Loan: No      |
| Umpqua Holdings Corp.                         | Umpqua Holdings Corp.                             | CUSIP: 904214103<br>LEI: 5299002ENJ7CY215BW86 | Long             | EC               | CORP              | US        |    114448 | NS      | $2319860.96   | 0.47%             |  |  |  | No            |                  1 | On Loan: No      |
| Altice USA, Inc.                              | Altice USA, Inc., Class A                         | CUSIP: 02156K103<br>LEI: 54930064K3612MGCER95 | Long             | EC               | CORP              | US        |    263432 | NS      | $1201249.92   | 0.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Ameriprise Financial, Inc.                    | Ameriprise Financial, Inc.                        | CUSIP: 03076C106<br>LEI: 6ZLKQF7QB6JAEKQS5388 | Long             | EC               | CORP              | US        |     28153 | NS      | $9345388.35   | 1.89%             |  |  |  | No            |                  1 | On Loan: No      |
| VICI Properties, Inc.                         | VICI Properties, Inc.                             | CUSIP: 925652109<br>LEI: 254900RKH6RY9KCJQH63 | Long             | EC               | CORP              | US        |    121040 | NS      | $4139568.00   | 0.84%             |  |  |  | No            |                  1 | On Loan: No      |
| Lear Corp.                                    | Lear Corp.                                        | CUSIP: 521865204<br>LEI: 549300UPNBTXA1SYTQ33 | Long             | EC               | CORP              | US        |     12575 | NS      | $1813818.00   | 0.37%             |  |  |  | No            |                  1 | On Loan: No      |
| Verint Systems, Inc.                          | Verint Systems, Inc.                              | CUSIP: 92343X100<br>LEI: 549300KEQJS5FRVUCO94 | Long             | EC               | CORP              | US        |     30348 | NS      | $1193586.84   | 0.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Advanced Energy Industries, Inc.              | Advanced Energy Industries, Inc.                  | CUSIP: 007973100<br>LEI: 549300756XI3QLFT2U27 | Long             | EC               | CORP              | US        |      2738 | NS      | $253648.32    | 0.05%             |  |  |  | No            |                  1 | On Loan: No      |
| National Retail Properties, Inc.              | National Retail Properties, Inc.                  | CUSIP: 637417106<br>LEI: 5493008JKH5SOTI0JS97 | Long             | EC               | CORP              | US        |    100372 | NS      | $4653245.92   | 0.94%             |  |  |  | No            |                  1 | On Loan: No      |
| Zurn Elkay Water Solutions Corp.              | Zurn Elkay Water Solutions Corp.                  | CUSIP: 98983L108<br>LEI: 549300AM3633XDFU1Q85 | Long             | EC               | CORP              | US        |     85736 | NS      | $2075668.56   | 0.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Comfort Systems USA, Inc.                     | Comfort Systems USA, Inc.                         | CUSIP: 199908104<br>LEI: 5299009DT1ZA5HTU6R38 | Long             | EC               | CORP              | US        |      6855 | NS      | $868939.80    | 0.18%             |  |  |  | No            |                  1 | On Loan: No      |
| Textron, Inc.                                 | Textron, Inc.                                     | CUSIP: 883203101<br>LEI: 3PPKBHUG1HD6BO7RNR87 | Long             | EC               | CORP              | US        |     84961 | NS      | $6064516.18   | 1.22%             |  |  |  | No            |                  1 | On Loan: No      |
| CF Industries Holdings, Inc.                  | CF Industries Holdings, Inc.                      | CUSIP: 125269100<br>LEI: 529900CG8YAQFZ2JMV97 | Long             | EC               | CORP              | US        |      5655 | NS      | $611814.45    | 0.12%             |  |  |  | No            |                  1 | On Loan: No      |
| Masco Corp.                                   | Masco Corp.                                       | CUSIP: 574599106<br>LEI: 5GCSNMQXHEYA1JO8QN11 | Long             | EC               | CORP              | US        |      3943 | NS      | $200225.54    | 0.04%             |  |  |  | No            |                  1 | On Loan: No      |
| East West Bancorp, Inc.                       | East West Bancorp, Inc.                           | CUSIP: 27579R104<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     89834 | NS      | $6307245.14   | 1.27%             |  |  |  | No            |                  1 | On Loan: No      |
| United States Steel Corp.                     | United States Steel Corp.                         | CUSIP: 912909108<br>LEI: JNLUVFYJT1OZSIQ24U47 | Long             | EC               | CORP              | US        |     58448 | NS      | $1536597.92   | 0.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Reinsurance Group of America, Inc.            | Reinsurance Group of America, Inc.                | CUSIP: 759351604<br>LEI: LORM1GNEU1DKEW527V90 | Long             | EC               | CORP              | US        |     55167 | NS      | $7966114.80   | 1.61%             |  |  |  | No            |                  1 | On Loan: No      |
| PACCAR, Inc.                                  | PACCAR, Inc.                                      | CUSIP: 693718108<br>LEI: KDTEY8BWE486IKZ3CC07 | Long             | EC               | CORP              | US        |     74125 | NS      | $7850578.75   | 1.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Western Digital Corp.                         | Western Digital Corp.                             | CUSIP: 958102105<br>LEI: 549300QQXOOYEF89IC56 | Long             | EC               | CORP              | US        |     18677 | NS      | $686379.75    | 0.14%             |  |  |  | No            |                  1 | On Loan: No      |
| CACI International, Inc.                      | CACI International, Inc., Class A                 | CUSIP: 127190304<br>LEI: SYRPI2D1O9WRTS2WX210 | Long             | EC               | CORP              | US        |     12412 | NS      | $3876267.60   | 0.78%             |  |  |  | No            |                  1 | On Loan: No      |
| O'Reilly Automotive, Inc.                     | O'Reilly Automotive, Inc.                         | CUSIP: 67103H107<br>LEI: 549300K2RLMQL149Q332 | Long             | EC               | CORP              | US        |      3024 | NS      | $2614368.96   | 0.53%             |  |  |  | No            |                  1 | On Loan: No      |
| Voya Financial, Inc.                          | Voya Financial, Inc.                              | CUSIP: 929089100<br>LEI: 549300T065Z4KJ686G75 | Long             | EC               | CORP              | US        |     60569 | NS      | $3996342.62   | 0.81%             |  |  |  | No            |                  1 | On Loan: No      |
| Kennametal, Inc.                              | Kennametal, Inc.                                  | CUSIP: 489170100<br>LEI: 549300GZDSG25XUV0Y08 | Long             | EC               | CORP              | US        |     40335 | NS      | $1065650.70   | 0.22%             |  |  |  | No            |                  1 | On Loan: No      |
| Cirrus Logic, Inc.                            | Cirrus Logic, Inc.                                | CUSIP: 172755100<br>LEI: 549300NKSJEM5ZZSSV18 | Long             | EC               | CORP              | US        |     38182 | NS      | $2852577.22   | 0.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Phillips Edison & Co., Inc.                   | Phillips Edison & Co., Inc.                       | CUSIP: 71844V201<br>LEI: 549300JPN4YHYPXTJQ85 | Long             | EC               | CORP              | US        |    105246 | NS      | $3392078.58   | 0.68%             |  |  |  | No            |                  1 | On Loan: No      |
| Texas Roadhouse, Inc.                         | Texas Roadhouse, Inc.                             | CUSIP: 882681109<br>LEI: 5299002Y1CNRPDGXTQ75 | Long             | EC               | CORP              | US        |     58937 | NS      | $5853622.84   | 1.18%             |  |  |  | No            |                  1 | On Loan: No      |
| AbCellera Biologics, Inc.                     | AbCellera Biologics, Inc.                         | CUSIP: 00288U106<br>LEI: 9845000861BC95FF9F73 | Long             | EC               | CORP              | CA        |     45290 | NS      | $582882.30    | 0.12%             |  |  |  | No            |                  1 | On Loan: No      |
| Targa Resources Corp.                         | Targa Resources Corp.                             | CUSIP: 87612G101<br>LEI: 5493003QENHHS261UR94 | Long             | EC               | CORP              | US        |     95115 | NS      | $7075604.85   | 1.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Dell Technologies, Inc.                       | Dell Technologies, Inc., Class C                  | CUSIP: 24703L202<br>LEI: 549300TJB5YBRUPOG437 | Long             | EC               | CORP              | US        |     94257 | NS      | $4221771.03   | 0.85%             |  |  |  | No            |                  1 | On Loan: No      |
| Electronic Arts, Inc.                         | Electronic Arts, Inc.                             | CUSIP: 285512109<br>LEI: 549300O7A67PUEYKDL45 | Long             | EC               | CORP              | US        |     46758 | NS      | $6115011.24   | 1.23%             |  |  |  | No            |                  1 | On Loan: No      |
| STORE Capital Corp.                           | STORE Capital Corp.                               | CUSIP: 862121100<br>LEI: 5493004EA6C9IHDZ7N66 | Long             | EC               | CORP              | US        |     47791 | NS      | $1524532.90   | 0.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Lam Research Corp.                            | Lam Research Corp.                                | CUSIP: 512807108<br>LEI: 549300I4GMO6D34U1T02 | Long             | EC               | CORP              | US        |      7745 | NS      | $3658583.10   | 0.74%             |  |  |  | No            |                  1 | On Loan: No      |
| Avient Corp.                                  | Avient Corp.                                      | CUSIP: 05368V106<br>LEI: SM8L9RZYIB34LNTWO040 | Long             | EC               | CORP              | US        |     76455 | NS      | $2646107.55   | 0.53%             |  |  |  | No            |                  1 | On Loan: No      |
| SLM Corp.                                     | SLM Corp.                                         | CUSIP: 78442P106<br>LEI: N/A                  | Long             | EC               | CORP              | US        |    400268 | NS      | $6988679.28   | 1.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Extra Space Storage, Inc.                     | Extra Space Storage, Inc.                         | CUSIP: 30225T102<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     37273 | NS      | $5989398.37   | 1.21%             |  |  |  | No            |                  1 | On Loan: No      |
| Align Technology, Inc.                        | Align Technology, Inc.                            | CUSIP: 016255101<br>LEI: 549300N5YSE0U3LCP840 | Long             | EC               | CORP              | US        |     11356 | NS      | $2233270.96   | 0.45%             |  |  |  | No            |                  1 | On Loan: No      |
| National Storage Affiliates Trust             | National Storage Affiliates Trust                 | CUSIP: 637870106<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     84635 | NS      | $3369319.35   | 0.68%             |  |  |  | No            |                  1 | On Loan: No      |
| Monolithic Power Systems, Inc.                | Monolithic Power Systems, Inc.                    | CUSIP: 609839105<br>LEI: 529900TB7O85LSZ1XU31 | Long             | EC               | CORP              | US        |      3144 | NS      | $1200882.24   | 0.24%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2022-12-30

**Name of Applicant:** MFS Series Trust X

**Signature:** Kasey Phillips

**Name of Signer:** Kasey Phillips

**Title:** Assistant Treasurer