# EDGAR Filing Document

**Accession Number:** 0000918571
**File Stem:** 0001410368-25-028895
**Filing Date:** 2025-11
**Character Count:** 44372
**Document Hash:** d46ea39af66447ee127d1d3b6578685c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-028895.hdr.sgml**: 20251124

**ACCESSION NUMBER**: 0001410368-25-028895

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 4

**CONFORMED PERIOD OF REPORT**: 20250930

**FILED AS OF DATE**: 20251124

**DATE AS OF CHANGE**: 20251124

**PERIOD START**: 20251231

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS VARIABLE INSURANCE TRUST
- **CENTRAL INDEX KEY:** 0000918571

**ORGANIZATION NAME:**
- **EIN:** 043226600
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-08326
- **FILM NUMBER:** 251509778

**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

## Series and Classes Contracts Data

### MFS Utilities Series (Series ID: S000002671)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000007312 | Initial Class |  |
| C000007313 | Service Class |  |

## Nport-Ex

VUF-Q3

![](imgdae374471.gif)

**Quarterly Report**

September 30, 2025

MFS<sup>®</sup> Utilities Series

![](img4c6d55782.gif)

MFS<sup>®</sup> Variable Insurance Trust

------

**Portfolio of Investments**

9/30/25 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – 98.8%  | Common Stocks – 98.8%  | Common Stocks – 98.8%  |
| Energy - Renewables – 2.1% | Energy - Renewables – 2.1% |  |
| EDP Renovaveis S.A. | 1622018 | &nbsp;&nbsp;&nbsp; $21424021 |
| Generac Holdings, Inc. (a) | 23073 | &nbsp;&nbsp;&nbsp; 3862420 |
|  |  | &nbsp;&nbsp;&nbsp; $25286441 |
| Natural Gas - Distribution – 3.1% | Natural Gas - Distribution – 3.1% |  |
| Atmos Energy Corp. | 124494 | &nbsp;&nbsp;&nbsp; $21257350 |
| NiSource, Inc. | 276315 | &nbsp;&nbsp;&nbsp; 11964439 |
| Spire, Inc. | 36132 | &nbsp;&nbsp;&nbsp; 2945481 |
|  |  | &nbsp;&nbsp;&nbsp; $36167270 |
| Telecom Services – 0.3% | Telecom Services – 0.3% |  |
| Hellenic Telecommunications Organization S.A.  | 180573 | &nbsp;&nbsp;&nbsp; $3417470 |
| Utilities - Electric Power – 91.7% | Utilities - Electric Power – 91.7% |  |
| Alliant Energy Corp. | 503064 | &nbsp;&nbsp;&nbsp; $33911544 |
| Ameren Corp. | 436114 | &nbsp;&nbsp;&nbsp; 45521579 |
| American Electric Power Co., Inc. | 379556 | &nbsp;&nbsp;&nbsp; 42700050 |
| CenterPoint Energy, Inc. | 230667 | &nbsp;&nbsp;&nbsp; 8949880 |
| Constellation Energy | 281587 | &nbsp;&nbsp;&nbsp; 92661834 |
| Dominion Energy, Inc. | 759274 | &nbsp;&nbsp;&nbsp; 46444791 |
| DTE Energy Co. | 368632 | &nbsp;&nbsp;&nbsp; 52135624 |
| Duke Energy Corp. | 100553 | &nbsp;&nbsp;&nbsp; 12443434 |
| E.ON SE | 491329 | &nbsp;&nbsp;&nbsp; 9238175 |
| Edison International | 634577 | &nbsp;&nbsp;&nbsp; 35079416 |
| Enel S.p.A. | 2055519 | &nbsp;&nbsp;&nbsp; 19495442 |
| Energias de Portugal S.A. | 2587011 | &nbsp;&nbsp;&nbsp; 12287932 |
| Entergy Corp. | 157800 | &nbsp;&nbsp;&nbsp; 14705382 |
| National Grid PLC | 1010692 | &nbsp;&nbsp;&nbsp; 14570740 |
| NextEra Energy, Inc. | 1714869 | &nbsp;&nbsp;&nbsp; 129455461 |
| OGE Energy Corp. | 318936 | &nbsp;&nbsp;&nbsp; 14757169 |
| PG&E Corp. | 4244449 | &nbsp;&nbsp;&nbsp; 64006291 |
| Pinnacle West Capital Corp. | 295607 | &nbsp;&nbsp;&nbsp; 26504124 |
| Portland General Electric Co. | 382750 | &nbsp;&nbsp;&nbsp; 16841000 |
| PPL Corp. | 1127278 | &nbsp;&nbsp;&nbsp; 41889650 |
| Public Service Enterprise Group, Inc. | 492200 | &nbsp;&nbsp;&nbsp; 41079012 |
| RWE AG | 972622 | &nbsp;&nbsp;&nbsp; 43186942 |
| Sempra Energy | 663042 | &nbsp;&nbsp;&nbsp; 59660519 |
| Southern Co. | 492829 | &nbsp;&nbsp;&nbsp; 46705404 |
| SSE PLC | 1066924 | &nbsp;&nbsp;&nbsp; 24988880 |
| Vistra Corp. | 293977 | &nbsp;&nbsp;&nbsp; 57595974 |
| WEC Energy Group, Inc. | 103123 | &nbsp;&nbsp;&nbsp; 11816864 |
| Xcel Energy, Inc. | 817056 | &nbsp;&nbsp;&nbsp; 65895566 |
|  |  | &nbsp;&nbsp;&nbsp; $1084528679 |
| Utilities - Water – 1.6% | Utilities - Water – 1.6% |  |
| United Utilities Group PLC | 826025 | &nbsp;&nbsp;&nbsp; $12736704 |
| Veolia Environnement S.A. | 166994 | &nbsp;&nbsp;&nbsp; 5705285 |
|  |  | &nbsp;&nbsp;&nbsp; $18441989 |
| **Total Common Stocks**  |  | &nbsp;&nbsp; **$1167841849** |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Mutual Funds (h) – 0.7%  | Mutual Funds (h) – 0.7%  | Mutual Funds (h) – 0.7%  |
| Money Market Funds – 0.7% | Money Market Funds – 0.7% |  |
| MFS Institutional Money Market Portfolio, 4.19% (v)  | 8761720 | &nbsp;&nbsp;&nbsp; $8762596 |
| Other Assets, Less Liabilities – 0.5% |  | &nbsp;&nbsp;&nbsp; 5643348 |
| **Net Assets – 100.0%** | **Net Assets – 100.0%** | &nbsp;&nbsp; **$1182247793** |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;(a) Non-income producing security.

&nbsp;&nbsp;&nbsp;&nbsp;(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
 issuers and in unaffiliated issuers were $8,762,596 and $1,167,841,849, respectively.

&nbsp;&nbsp;&nbsp;&nbsp;(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.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | |
|:---|:---|
| Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise <br> indicated. A list of abbreviations is shown below: | Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise <br> indicated. A list of abbreviations is shown below: |
| CAD | Canadian Dollar |
| EUR | Euro |
| GBP | British Pound |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **Derivative Contracts at 9/30/25** | **Derivative Contracts at 9/30/25** | **Derivative Contracts at 9/30/25** | **Derivative Contracts at 9/30/25** | **Derivative Contracts at 9/30/25** | **Derivative Contracts at 9/30/25** | **Derivative Contracts at 9/30/25** |
| **Forward Foreign Currency Exchange Contracts**  | **Forward Foreign Currency Exchange Contracts**  | **Forward Foreign Currency Exchange Contracts**  | **Forward Foreign Currency Exchange Contracts**  | **Forward Foreign Currency Exchange Contracts**  | **Forward Foreign Currency Exchange Contracts**  | **Forward Foreign Currency Exchange Contracts**  |
| **Currency** <br>**Purchased** | **Currency** <br>**Purchased** | &nbsp;&nbsp; **Currency** <br>**Sold** | &nbsp;&nbsp; **Currency** <br>**Sold** | **Counterparty** | &nbsp;&nbsp; **Settlement** <br>**Date**<br>| **Unrealized** <br>**Appreciation** <br>**(Depreciation)**<br>|
| **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** |
| CAD | &nbsp;&nbsp; 1142398 | USD | &nbsp;&nbsp; 820423 | Merrill Lynch International | 10/17/2025 | &nbsp;&nbsp; $1073 |
| CAD | &nbsp;&nbsp; 232299 | USD | &nbsp;&nbsp; 167027 | Morgan Stanley Capital Services LLC | 10/17/2025 | &nbsp;&nbsp; 18 |
| EUR | &nbsp;&nbsp; 239925 | USD | &nbsp;&nbsp; 281383 | BNP PARIBAS | 10/17/2025 | &nbsp;&nbsp; 559 |
| EUR | &nbsp;&nbsp; 3346495 | USD | &nbsp;&nbsp; 3923550 | HSBC Bank | 10/17/2025 | &nbsp;&nbsp; 9000 |
| EUR | &nbsp;&nbsp; 3083055 | USD | &nbsp;&nbsp; 3600329 | Morgan Stanley Capital Services LLC | 10/17/2025 | &nbsp;&nbsp; 22646 |
| EUR | &nbsp;&nbsp; 2166534 | USD | &nbsp;&nbsp; 2532536 | UBS AG | 10/17/2025 | &nbsp;&nbsp; 13410 |
| USD | &nbsp;&nbsp; 6058500 | CAD | &nbsp;&nbsp; 8285373 | Merrill Lynch International | 10/17/2025 | &nbsp;&nbsp; 100505 |
| USD | &nbsp;&nbsp; 786470 | CAD | &nbsp;&nbsp; 1072455 | Morgan Stanley Capital Services LLC | 10/17/2025 | &nbsp;&nbsp; 15269 |
| USD | &nbsp;&nbsp; 10821744 | GBP | &nbsp;&nbsp; 8031337 | Goldman Sachs International | 10/17/2025 | &nbsp;&nbsp; 19483 |
| USD | &nbsp;&nbsp; 15299950 | GBP | &nbsp;&nbsp; 11357610 | HSBC Bank | 10/17/2025 | &nbsp;&nbsp; 23805 |
| USD | &nbsp;&nbsp; 6113113 | GBP | &nbsp;&nbsp; 4537478 | State Street Corp. | 10/17/2025 | &nbsp;&nbsp; 10141 |
|  |  |  |  |  |  | &nbsp;&nbsp; $215909 |
| **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** |
| CAD | &nbsp;&nbsp; 4519005 | USD | &nbsp;&nbsp; 3269167 | Goldman Sachs International | 10/17/2025 | &nbsp;&nbsp; $(19559)<br>|
| CAD | &nbsp;&nbsp; 2696971 | USD | &nbsp;&nbsp; 1952799 | Merrill Lynch International | 10/17/2025 | &nbsp;&nbsp; (13412)<br>|
| CAD | &nbsp;&nbsp; 490145 | USD | &nbsp;&nbsp; 355378 | State Street Corp. | 10/17/2025 | &nbsp;&nbsp; (2916)<br>|
| CAD | &nbsp;&nbsp; 277010 | USD | &nbsp;&nbsp; 199507 | UBS AG | 10/17/2025 | &nbsp;&nbsp; (310)<br>|
| EUR | &nbsp;&nbsp; 212650 | USD | &nbsp;&nbsp; 250242 | HSBC Bank | 10/17/2025 | &nbsp;&nbsp; (352)<br>|
| EUR | &nbsp;&nbsp; 615016 | USD | &nbsp;&nbsp; 724536 | Morgan Stanley Capital Services LLC | 10/17/2025 | &nbsp;&nbsp; (1816)<br>|
| EUR | &nbsp;&nbsp; 8533114 | USD | &nbsp;&nbsp; 10059002 | State Street Corp. | 10/17/2025 | &nbsp;&nbsp; (31529)<br>|
| EUR | &nbsp;&nbsp; 2224461 | USD | &nbsp;&nbsp; 2627629 | UBS AG | 10/17/2025 | &nbsp;&nbsp; (13610)<br>|
| USD | &nbsp;&nbsp; 57858436 | EUR | &nbsp;&nbsp; 49404573 | Barclays Bank PLC | 10/17/2025 | &nbsp;&nbsp; (198096)<br>|
| USD | &nbsp;&nbsp; 20260741 | EUR | &nbsp;&nbsp; 17291601 | Citibank N.A. | 10/17/2025 | &nbsp;&nbsp; (59045)<br>|
| USD | &nbsp;&nbsp; 16730462 | EUR | &nbsp;&nbsp; 14285840 | Deutsche Bank AG | 10/17/2025 | &nbsp;&nbsp; (57182)<br>|
| USD | &nbsp;&nbsp; 607800 | GBP | &nbsp;&nbsp; 452530 | Morgan Stanley Capital Services LLC | 10/17/2025 | &nbsp;&nbsp; (860)<br>|
|  |  |  |  |  |  | &nbsp;&nbsp; $(398687)<br>|

---

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

------

**Supplemental Information**

9/30/25 (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**

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, 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. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which

approximates market value. 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. 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 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 significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk).

------

*Supplemental Information (unaudited) – continued*

Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. Other financial instruments are derivative instruments, such as forward foreign currency exchange contracts. The following is a summary of the levels used as of September 30, 2025 in valuing the fund's assets and liabilities:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Financial Instruments** | **Level 1** | **Level 2** | **Level 3** | **Total** |
| Equity Securities: |  |  |  |  |
| &nbsp;&nbsp;&nbsp; United States | &nbsp;&nbsp;&nbsp; $1000790258 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $1000790258 |
| &nbsp;&nbsp;&nbsp; Germany | &nbsp;&nbsp;&nbsp; 52425117 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 52425117 |
| &nbsp;&nbsp;&nbsp; United Kingdom | &nbsp;&nbsp;&nbsp; 37725584 | &nbsp;&nbsp;&nbsp; 14570740 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 52296324 |
| &nbsp;&nbsp;&nbsp; Portugal | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 33711953 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 33711953 |
| &nbsp;&nbsp;&nbsp; Italy | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 19495442 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 19495442 |
| &nbsp;&nbsp;&nbsp; France | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 5705285 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 5705285 |
| &nbsp;&nbsp;&nbsp; Greece | &nbsp;&nbsp;&nbsp; 3417470 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 3417470 |
| Investment Companies | &nbsp;&nbsp;&nbsp; 8762596 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 8762596 |
| Total | &nbsp;&nbsp;&nbsp; $1103121025 | &nbsp;&nbsp;&nbsp; $73483420 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $1176604445 |
| **Other Financial Instruments** |  |  |  |  |
| Forward Foreign Currency Exchange Contracts – Assets | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $215909 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $215909 |
| Forward Foreign Currency Exchange Contracts – Liabilities | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; (398687)<br>| &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; (398687)<br>|

---

For further information regarding security characteristics, see the Portfolio of Investments.

**(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 for the period ended September 30, 2025:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated Issuers** | **Beginning** <br>**Value**<br>| **Purchases** | **Sales** <br>**Proceeds**<br>| **Realized** <br>**Gain** <br>**(Loss)**<br>| **Change in** <br>**Unrealized** <br>**Appreciation or** <br>**Depreciation**<br>| **Ending** <br>**Value**<br>|
| MFS Institutional Money Market Portfolio  | &nbsp;&nbsp; $23322150 | &nbsp;&nbsp; $154884180 | &nbsp;&nbsp; $169437275 | &nbsp;&nbsp; $(4901)<br>| &nbsp;&nbsp; $(1558)<br>| &nbsp;&nbsp; $8762596<br>|

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Affiliated Issuers** | **Dividend** <br>**Income**<br>| **Capital Gain** <br>**Distributions**<br>|
| MFS Institutional Money Market Portfolio  | &nbsp;&nbsp; $396617 | &nbsp;&nbsp; $— |

---

------

## 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 VARIABLE INSURANCE TRUST

- **b. Investment Company Act file number:** 811-08326

- **c. CIK number of Registrant:** 0000918571

- **d. LEI of Registrant:** 4GB90YGNINHU70MFQX13

- **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 Utilities Series

- **b. EDGAR series identifier (if any):** S000002671

- **c. LEI of Series:** OZ8DIUGQBG5YU1RDNH48

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

- **a. Date of fiscal year-end:** 2025-12-31

- **b. Date as of which information is reported:** 2025-09-30

**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:** $1185844437.31

**Total Liabilities:** $3144397.94

**Net Assets:** $1182700039.37

**Cash Not Reported:** $1200.53

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000007312 | 3.77%                | -1.02%               | 3.91%                |
| Class ID C000007313 | 3.73%                | -1.04%               | 3.89%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-2136638.65             | $34573825.02                               |
| Month 2  | $2686351.60              | $-13417749.30                              |
| Month 3  | $2637840.86              | $39915003.22                               |

**Designated Index Information**

- **Index Name:** S&P 500

- **Index Identifier:** SPX

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| EDP SA                                      | EDP SA                                      | CUSIP: 000000000<br>LEI: 529900CLC3WDMGI9VH80 | Long             | EC               | CORP              | PT        |   2587011 | NS      | $12287931.70  | 1.04%             |  |  |  | No            |                  2 | On Loan: No      |
| State Street Bank & Trust Co.               | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: 571474TGEMMWANRLN572 | N/A              | DFE              |  | N/A       |         1 | NC      | $-503.85      | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| American Electric Power Co Inc              | American Electric Power Co Inc              | CUSIP: 025537101<br>LEI: 1B4S6S7G0TW5EE83BO58 | Long             | EC               | CORP              | US        |    379556 | NS      | $42700050.00  | 3.61%             |  |  |  | No            |                  1 | On Loan: No      |
| Vistra Corp                                 | Vistra Corp                                 | CUSIP: 92840M102<br>LEI: 549300KP43CPCUJOOG15 | Long             | EC               | CORP              | US        |    293977 | NS      | $57595973.84  | 4.87%             |  |  |  | No            |                  1 | On Loan: No      |
| Dominion Energy Inc                         | Dominion Energy Inc                         | CUSIP: 25746U109<br>LEI: ILUL7B6Z54MRYCF6H308 | Long             | EC               | CORP              | US        |    759274 | NS      | $46444790.58  | 3.93%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street Bank & Trust Co.               | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: 571474TGEMMWANRLN572 | N/A              | DFE              |  | N/A       |         1 | NC      | $-29816.97    | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| NextEra Energy Inc                          | NextEra Energy Inc                          | CUSIP: 65339F101<br>LEI: 254900RHL9MEUS5NKX63 | Long             | EC               | CORP              | US        |   1714869 | NS      | $129455460.81 | 10.95%            |  |  |  | No            |                  1 | On Loan: No      |
| Morgan Stanley Capital Services LLC         | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: I7331LVCZKQKX5T7XV54 | N/A              | DFE              |  | N/A       |         1 | NC      | $7850.14      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| WEC Energy Group Inc                        | WEC Energy Group Inc                        | CUSIP: 92939U106<br>LEI: 549300IGLYTZUK3PVP70 | Long             | EC               | CORP              | US        |    103123 | NS      | $11816864.57  | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Merrill Lynch International                 | PURCHASED USD / SOLD CAD                    | CUSIP: 000000000<br>LEI: GGDZP1UYGU9STUHRDP48 | N/A              | DFE              |  | US        |         1 | NC      | $4556.63      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Xcel Energy Inc                             | Xcel Energy Inc                             | CUSIP: 98389B100<br>LEI: LGJNMI9GH8XIDG5RCM61 | Long             | EC               | CORP              | US        |    817056 | NS      | $65895566.40  | 5.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Atmos Energy Corp                           | Atmos Energy Corp                           | CUSIP: 049560105<br>LEI: QVLWEGTD2S8GJMO8D383 | Long             | EC               | CORP              | US        |    124494 | NS      | $21257350.50  | 1.80%             |  |  |  | No            |                  1 | On Loan: No      |
| BNP Paribas SA                              | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: R0MUWSFPU8MPRO8K5P83 | N/A              | DFE              |  | N/A       |         1 | NC      | $558.78       | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| PPL Corp                                    | PPL Corp                                    | CUSIP: 69351T106<br>LEI: 9N3UAJSNOUXFKQLF3V18 | Long             | EC               | CORP              | US        |   1127278 | NS      | $41889650.48  | 3.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Southern Co/The                             | Southern Co/The                             | CUSIP: 842587107<br>LEI: 549300FC3G3YU2FBZD92 | Long             | EC               | CORP              | US        |    492829 | NS      | $46705404.33  | 3.95%             |  |  |  | No            |                  1 | On Loan: No      |
| Goldman Sachs International                 | PURCHASED CAD / SOLD USD                    | CUSIP: 000000000<br>LEI: W22LROWP2IHZNBB6K528 | N/A              | DFE              |  | CA        |         1 | NC      | $-19559.35    | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| State Street Bank & Trust Co.               | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: 571474TGEMMWANRLN572 | N/A              | DFE              |  | N/A       |         1 | NC      | $-1207.97     | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| Edison International                        | Edison International                        | CUSIP: 281020107<br>LEI: 549300I7ROF15MAEVP56 | Long             | EC               | CORP              | US        |    634577 | NS      | $35079416.56  | 2.97%             |  |  |  | No            |                  1 | On Loan: No      |
| Generac Holdings Inc                        | Generac Holdings Inc                        | CUSIP: 368736104<br>LEI: 529900S2H2AHJHSFFI84 | Long             | EC               | CORP              | US        |     23073 | NS      | $3862420.20   | 0.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Enel SpA                                    | Enel SpA                                    | CUSIP: 000000000<br>LEI: WOCMU6HCI0OJWNPRZS33 | Long             | EC               | CORP              | IT        |   2055519 | NS      | $19495442.43  | 1.65%             |  |  |  | No            |                  2 | On Loan: No      |
| HSBC Bank USA NA                            | PURCHASED USD / SOLD GBP                    | CUSIP: 000000000<br>LEI: 1IE8VN30JCEQV1H4R804 | N/A              | DFE              |  | US        |         1 | NC      | $23804.84     | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Constellation Energy Corp                   | Constellation Energy Corp                   | CUSIP: 21037T109<br>LEI: 549300F8Y20RYGNGV346 | Long             | EC               | CORP              | US        |    281587 | NS      | $92661834.09  | 7.83%             |  |  |  | No            |                  1 | On Loan: No      |
| Pinnacle West Capital Corp                  | Pinnacle West Capital Corp                  | CUSIP: 723484101<br>LEI: TWSEY0NEDUDCKS27AH81 | Long             | EC               | CORP              | US        |    295607 | NS      | $26504123.62  | 2.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Barclays Bank PLC                           | PURCHASED USD / SOLD EUR                    | CUSIP: 000000000<br>LEI: G5GSEF7VJP5I7OUK5573 | N/A              | DFE              |  | US        |         1 | NC      | $-198096.36   | -0.02%            |  |  |  | No            |                  2 | On Loan: No      |
| Spire Inc                                   | Spire Inc                                   | CUSIP: 84857L101<br>LEI: 549300NXSY15DRY2R511 | Long             | EC               | CORP              | US        |     30265 | NS      | $2467202.80   | 0.21%             |  |  |  | No            |                  1 | On Loan: No      |
| Entergy Corp                                | Entergy Corp                                | CUSIP: 29364G103<br>LEI: 4XM3TW50JULSLG8BNC79 | Long             | EC               | CORP              | US        |    157800 | NS      | $14705382.00  | 1.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Sempra                                      | Sempra                                      | CUSIP: 816851109<br>LEI: PBBKGKLRK5S5C0Y4T545 | Long             | EC               | CORP              | US        |    663042 | NS      | $59660519.16  | 5.04%             |  |  |  | No            |                  1 | On Loan: No      |
| Morgan Stanley Capital Services LLC         | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: I7331LVCZKQKX5T7XV54 | N/A              | DFE              |  | N/A       |         1 | NC      | $-1815.85     | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| State Street Bank & Trust Co.               | PURCHASED CAD / SOLD USD                    | CUSIP: 000000000<br>LEI: 571474TGEMMWANRLN572 | N/A              | DFE              |  | CA        |         1 | NC      | $-2915.42     | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| Portland General Electric Co                | Portland General Electric Co                | CUSIP: 736508847<br>LEI: GJOUP9M7C39GLSK9R870 | Long             | EC               | CORP              | US        |    382750 | NS      | $16841000.00  | 1.42%             |  |  |  | No            |                  1 | On Loan: No      |
| UBS AG                                      | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: BFM8T61CT2L1QCEMIK50 | N/A              | DFE              |  | N/A       |         1 | NC      | $-13609.98    | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| Citibank NA                                 | PURCHASED USD / SOLD EUR                    | CUSIP: 000000000<br>LEI: E57ODZWZ7FF32TWEFA76 | N/A              | DFE              |  | US        |         1 | NC      | $-59045.23    | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| Morgan Stanley Capital Services LLC         | PURCHASED USD / SOLD CAD                    | CUSIP: 000000000<br>LEI: I7331LVCZKQKX5T7XV54 | N/A              | DFE              |  | US        |         1 | NC      | $15269.60     | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| OGE Energy Corp                             | OGE Energy Corp                             | CUSIP: 670837103<br>LEI: CE5OG6JPOZMDSA0LAQ19 | Long             | EC               | CORP              | US        |    318936 | NS      | $14757168.72  | 1.25%             |  |  |  | No            |                  1 | On Loan: No      |
| SSE PLC                                     | SSE PLC                                     | CUSIP: 000000000<br>LEI: 549300KI75VYLLMSK856 | Long             | EC               | CORP              | GB        |   1066924 | NS      | $24988879.64  | 2.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Deutsche Bank AG                            | PURCHASED USD / SOLD EUR                    | CUSIP: 000000000<br>LEI: 7LTWFZYICNSX8D621K86 | N/A              | DFE              |  | US        |         1 | NC      | $-57181.60    | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| HSBC Bank USA NA                            | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: 1IE8VN30JCEQV1H4R804 | N/A              | DFE              |  | N/A       |         1 | NC      | $2472.41      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Alliant Energy Corp                         | Alliant Energy Corp                         | CUSIP: 018802108<br>LEI: 5493009ML300G373MZ12 | Long             | EC               | CORP              | US        |    503064 | NS      | $33911544.24  | 2.87%             |  |  |  | No            |                  1 | On Loan: No      |
| Veolia Environnement SA                     | Veolia Environnement SA                     | CUSIP: 000000000<br>LEI: 969500LENY69X51OOT31 | Long             | EC               | CORP              | FR        |    166994 | NS      | $5705284.71   | 0.48%             |  |  |  | No            |                  2 | On Loan: No      |
| Hellenic Telecommunications Organization SA | Hellenic Telecommunications Organization SA | CUSIP: 000000000<br>LEI: ELPUFM0XZRZO4LFXW404 | Long             | EC               | CORP              | GR        |    200829 | NS      | $3800828.74   | 0.32%             |  |  |  | No            |                  1 | On Loan: No      |
| Morgan Stanley Capital Services LLC         | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: I7331LVCZKQKX5T7XV54 | N/A              | DFE              |  | N/A       |         1 | NC      | $9428.86      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| PG&E Corp                                   | PG&E Corp                                   | CUSIP: 69331C108<br>LEI: 8YQ2GSDWYZXO2EDN3511 | Long             | EC               | CORP              | US        |   4244449 | NS      | $64006290.92  | 5.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Morgan Stanley Capital Services LLC         | PURCHASED USD / SOLD GBP                    | CUSIP: 000000000<br>LEI: I7331LVCZKQKX5T7XV54 | N/A              | DFE              |  | US        |         1 | NC      | $-859.74      | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| United Utilities Group PLC                  | United Utilities Group PLC                  | CUSIP: 000000000<br>LEI: 2138002IEYQAOC88ZJ59 | Long             | EC               | CORP              | GB        |    826025 | NS      | $12736704.50  | 1.08%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Institutional Money Market Portfolio    | MFS Institutional Money Market Portfolio    | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | EC               | RF                | US        |   8686367 | NS      | $8687235.68   | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| UBS AG                                      | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: BFM8T61CT2L1QCEMIK50 | N/A              | DFE              |  | N/A       |         1 | NC      | $1210.13      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| CenterPoint Energy Inc                      | CenterPoint Energy Inc                      | CUSIP: 15189T107<br>LEI: 21TPXMRRHFKOBHDC8J74 | Long             | EC               | CORP              | US        |    230667 | NS      | $8949879.60   | 0.76%             |  |  |  | No            |                  1 | On Loan: No      |
| NiSource Inc                                | NiSource Inc                                | CUSIP: 65473P105<br>LEI: 549300D8GOWWH0SJB189 | Long             | EC               | CORP              | US        |    276315 | NS      | $11964439.50  | 1.01%             |  |  |  | No            |                  1 | On Loan: No      |
| EDP Renovaveis SA                           | EDP Renovaveis SA                           | CUSIP: 000000000<br>LEI: 529900MUFAH07Q1TAX06 | Long             | EC               | CORP              | ES        |   1622018 | NS      | $21424020.48  | 1.81%             |  |  |  | No            |                  2 | On Loan: No      |
| Duke Energy Corp                            | Duke Energy Corp                            | CUSIP: 26441C204<br>LEI: I1BZKREC126H0VB1BL91 | Long             | EC               | CORP              | US        |    100553 | NS      | $12443433.75  | 1.05%             |  |  |  | No            |                  1 | On Loan: No      |
| E.ON SE                                     | E.ON SE                                     | CUSIP: 000000000<br>LEI: Q9MAIUP40P25UFBFG033 | Long             | EC               | CORP              | DE        |    491329 | NS      | $9238174.89   | 0.78%             |  |  |  | No            |                  1 | On Loan: No      |
| Ameren Corp                                 | Ameren Corp                                 | CUSIP: 023608102<br>LEI: XRZQ5S7HYJFPHJ78L959 | Long             | EC               | CORP              | US        |    436114 | NS      | $45521579.32  | 3.85%             |  |  |  | No            |                  1 | On Loan: No      |
| UBS AG                                      | PURCHASED CAD / SOLD USD                    | CUSIP: 000000000<br>LEI: BFM8T61CT2L1QCEMIK50 | N/A              | DFE              |  | CA        |         1 | NC      | $-310.33      | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| RWE AG                                      | RWE AG                                      | CUSIP: 000000000<br>LEI: 529900GB7KCA94ACC940 | Long             | EC               | CORP              | DE        |    972622 | NS      | $43186941.79  | 3.65%             |  |  |  | No            |                  1 | On Loan: No      |
| Merrill Lynch International                 | PURCHASED USD / SOLD CAD                    | CUSIP: 000000000<br>LEI: GGDZP1UYGU9STUHRDP48 | N/A              | DFE              |  | US        |         1 | NC      | $95947.84     | 0.01%             |  |  |  | No            |                  2 | On Loan: No      |
| HSBC Bank USA NA                            | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: 1IE8VN30JCEQV1H4R804 | N/A              | DFE              |  | N/A       |         1 | NC      | $3794.18      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Merrill Lynch International                 | PURCHASED CAD / SOLD USD                    | CUSIP: 000000000<br>LEI: GGDZP1UYGU9STUHRDP48 | N/A              | DFE              |  | CA        |         1 | NC      | $1072.43      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Merrill Lynch International                 | PURCHASED CAD / SOLD USD                    | CUSIP: 000000000<br>LEI: GGDZP1UYGU9STUHRDP48 | N/A              | DFE              |  | CA        |         1 | NC      | $-13412.19    | -0.00%            |  |  |  | No            |                  2 | On Loan: No      |
| HSBC Bank USA NA                            | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: 1IE8VN30JCEQV1H4R804 | N/A              | DFE              |  | N/A       |         1 | NC      | $2733.34      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| National Grid PLC                           | National Grid PLC                           | CUSIP: 000000000<br>LEI: 8R95QZMKZLJX5Q2XR704 | Long             | EC               | CORP              | GB        |   1010692 | NS      | $14570739.67  | 1.23%             |  |  |  | No            |                  2 | On Loan: No      |
| Goldman Sachs International                 | PURCHASED USD / SOLD GBP                    | CUSIP: 000000000<br>LEI: W22LROWP2IHZNBB6K528 | N/A              | DFE              |  | US        |         1 | NC      | $19483.51     | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| UBS AG                                      | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: BFM8T61CT2L1QCEMIK50 | N/A              | DFE              |  | N/A       |         1 | NC      | $12200.19     | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| DTE Energy Co                               | DTE Energy Co                               | CUSIP: 233331107<br>LEI: 549300IX8SD6XXD71I78 | Long             | EC               | CORP              | US        |    368632 | NS      | $52135623.76  | 4.41%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street Bank & Trust Co.               | PURCHASED USD / SOLD GBP                    | CUSIP: 000000000<br>LEI: 571474TGEMMWANRLN572 | N/A              | DFE              |  | US        |         1 | NC      | $10140.98     | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Morgan Stanley Capital Services LLC         | PURCHASED EUR / SOLD USD                    | CUSIP: 000000000<br>LEI: I7331LVCZKQKX5T7XV54 | N/A              | DFE              |  | N/A       |         1 | NC      | $5367.08      | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Public Service Enterprise Group Inc         | Public Service Enterprise Group Inc         | CUSIP: 744573106<br>LEI: PUSS41EMO3E6XXNV3U28 | Long             | EC               | CORP              | US        |    492200 | NS      | $41079012.00  | 3.47%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-10-30

**Name of Applicant:** MFS VARIABLE INSURANCE TRUST

**Signature:** James Byrne

**Name of Signer:** James Byrne

**Title:** Assistant Treasurer