# EDGAR Filing Document

**Accession Number:** 0000918571
**File Stem:** 0001410368-26-050747
**Filing Date:** 2026-5
**Character Count:** 61920
**Document Hash:** 29c987b1aad0adc00c6110ae83cdc89d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-050747.hdr.sgml**: 20260526

**ACCESSION NUMBER**: 0001410368-26-050747

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 4

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260526

**DATE AS OF CHANGE**: 20260526

**PERIOD START**: 20261231

**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:** 261016332

**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 Mid Cap Growth Series (Series ID: S000002678)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000007326 | Initial Class |  |
| C000007327 | Service Class |  |

## Nport-Ex

VMG-Q1

![](imge0c625b01.gif)

**Quarterly Report**

March 31, 2026

MFS<sup>®</sup> Mid Cap Growth Series

![](imgedf071e42.gif)

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

------

**Portfolio of Investments**

3/31/26 (unaudited)

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

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

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – 99.1%  | Common Stocks – 99.1%  | Common Stocks – 99.1%  |
| Aerospace & Defense – 11.1% | Aerospace & Defense – 11.1% |  |
| Axon Enterprise, Inc. (a) | 11998 | &nbsp;&nbsp;&nbsp; $5095431 |
| BWX Technologies, Inc. | 17390 | &nbsp;&nbsp;&nbsp; 3556081 |
| Curtiss-Wright Corp. | 6141 | &nbsp;&nbsp;&nbsp; 4182758 |
| Hexcel Corp. | 37412 | &nbsp;&nbsp;&nbsp; 3027753 |
| Howmet Aerospace, Inc. | 57807 | &nbsp;&nbsp;&nbsp; 13322201 |
| Huntington Ingalls Industries, Inc. | 4433 | &nbsp;&nbsp;&nbsp; 1684097 |
| RBC Bearings, Inc. (a) | 4927 | &nbsp;&nbsp;&nbsp; 2675952 |
| Woodward, Inc. | 5765 | &nbsp;&nbsp;&nbsp; 2063409 |
|  |  | &nbsp;&nbsp;&nbsp; $35607682 |
| Apparel, Footwear, & Accessories – 0.9% | Apparel, Footwear, & Accessories – 0.9% |  |
| Amer Sports, Inc. (a) | 49856 | &nbsp;&nbsp;&nbsp; $1641260 |
| VF Corp. | 75269 | &nbsp;&nbsp;&nbsp; 1278820 |
|  |  | &nbsp;&nbsp;&nbsp; $2920080 |
| Auto & Auto Components – 1.8% | Auto & Auto Components – 1.8% |  |
| Carvana Co. (a) | 14182 | &nbsp;&nbsp;&nbsp; $4458537 |
| Modine Manufacturing Co. (a) | 5997 | &nbsp;&nbsp;&nbsp; 1299610 |
|  |  | &nbsp;&nbsp;&nbsp; $5758147 |
| Brokerage & Asset Managers – 4.2% | Brokerage & Asset Managers – 4.2% |  |
| Ares Management Co. | 10004 | &nbsp;&nbsp;&nbsp; $1091436 |
| Carlyle Group, Inc. | 91738 | &nbsp;&nbsp;&nbsp; 4439202 |
| LPL Financial Holdings, Inc. | 22524 | &nbsp;&nbsp;&nbsp; 6775895 |
| Robinhood Markets, Inc. (a) | 18126 | &nbsp;&nbsp;&nbsp; 1256132 |
|  |  | &nbsp;&nbsp;&nbsp; $13562665 |
| Business Services – 0.4% | Business Services – 0.4% |  |
| TransUnion  | 18126 | &nbsp;&nbsp;&nbsp; $1254138 |
| Construction – 1.8% | Construction – 1.8% |  |
| Ferguson Enterprises, Inc. | 3885 | &nbsp;&nbsp;&nbsp; $906215 |
| Vulcan Materials Co. | 17661 | &nbsp;&nbsp;&nbsp; 4809090 |
|  |  | &nbsp;&nbsp;&nbsp; $5715305 |
| Diversified Financial Services – 1.8% | Diversified Financial Services – 1.8% |  |
| NASDAQ, Inc.  | 66130 | &nbsp;&nbsp;&nbsp; $5613776 |
| Electrical Equipment – 2.7% | Electrical Equipment – 2.7% |  |
| AMETEK, Inc. | 11361 | &nbsp;&nbsp;&nbsp; $2435344 |
| Hubbell, Inc. | 6122 | &nbsp;&nbsp;&nbsp; 3004310 |
| Vertiv Holdings Co. | 13030 | &nbsp;&nbsp;&nbsp; 3265058 |
|  |  | &nbsp;&nbsp;&nbsp; $8704712 |
| Energy - Independent – 2.0% | Energy - Independent – 2.0% |  |
| Antero Resources Corp. (a) | 46786 | &nbsp;&nbsp;&nbsp; $1985598 |
| Expand Energy Corp. | 30451 | &nbsp;&nbsp;&nbsp; 3342911 |
| Ovintiv, Inc. | 19538 | &nbsp;&nbsp;&nbsp; 1159775 |
|  |  | &nbsp;&nbsp;&nbsp; $6488284 |
| Energy - Renewables – 0.7% | Energy - Renewables – 0.7% |  |
| Bloom Energy Corp. (a) | 7485 | &nbsp;&nbsp;&nbsp; $1014143 |
| Generac Holdings, Inc. (a) | 6292 | &nbsp;&nbsp;&nbsp; 1229016 |
|  |  | &nbsp;&nbsp;&nbsp; $2243159 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Engineering - Construction – 4.4% | Engineering - Construction – 4.4% |  |
| EMCOR Group, Inc. | 5506 | &nbsp;&nbsp;&nbsp; $4065135 |
| Quanta Services, Inc. | 16910 | &nbsp;&nbsp;&nbsp; 9283928 |
| TopBuild Corp. (a) | 1590 | &nbsp;&nbsp;&nbsp; 558567 |
|  |  | &nbsp;&nbsp;&nbsp; $13907630 |
| Entertainment & Leisure – 7.0% | Entertainment & Leisure – 7.0% |  |
| Live Nation Entertainment, Inc. (a) | 53885 | &nbsp;&nbsp;&nbsp; $8218001 |
| New York Times Co., "A" | 3786 | &nbsp;&nbsp;&nbsp; 317002 |
| Roblox Corp., "A" (a) | 79869 | &nbsp;&nbsp;&nbsp; 4517391 |
| Take-Two Interactive Software, Inc. (a) | 46998 | &nbsp;&nbsp;&nbsp; 9282105 |
|  |  | &nbsp;&nbsp;&nbsp; $22334499 |
| Food & Beverages – 0.6% | Food & Beverages – 0.6% |  |
| Celsius Holdings, Inc. (a)  | 53046 | &nbsp;&nbsp;&nbsp; $1882072 |
| Hardware, Peripherals, & Assembly – 0.8% | Hardware, Peripherals, & Assembly – 0.8% |  |
| Seagate Technology Holdings PLC  | 6810 | &nbsp;&nbsp;&nbsp; $2667886 |
| Machinery & Tools – 2.8% | Machinery & Tools – 2.8% |  |
| Applied Industrial Technologies, Inc. | 5496 | &nbsp;&nbsp;&nbsp; $1458199 |
| Donaldson Co., Inc. | 11273 | &nbsp;&nbsp;&nbsp; 956740 |
| Ingersoll Rand, Inc. | 12615 | &nbsp;&nbsp;&nbsp; 1010714 |
| Lincoln Electric Holdings, Inc. | 4268 | &nbsp;&nbsp;&nbsp; 1063073 |
| Nordson Corp. | 4198 | &nbsp;&nbsp;&nbsp; 1116920 |
| Trimble, Inc. (a) | 49775 | &nbsp;&nbsp;&nbsp; 3246823 |
|  |  | &nbsp;&nbsp;&nbsp; $8852469 |
| Media – 3.0% | Media – 3.0% |  |
| Liberty Media Corp. (a) | 12771 | &nbsp;&nbsp;&nbsp; $1085790 |
| Spotify Technology S.A. (a) | 2861 | &nbsp;&nbsp;&nbsp; 1387328 |
| TKO Group Holdings, Inc. | 36008 | &nbsp;&nbsp;&nbsp; 7261013 |
|  |  | &nbsp;&nbsp;&nbsp; $9734131 |
| Medical & Health Technology & Services – 0.7% | Medical & Health Technology & Services – 0.7% |  |
| Charles River Laboratories International, Inc. (a) | 10782 | &nbsp;&nbsp;&nbsp; $1859895 |
| Minimed Group, Inc. (a) | 18259 | &nbsp;&nbsp;&nbsp; 272424 |
|  |  | &nbsp;&nbsp;&nbsp; $2132319 |
| Medical Equipment – 11.1% | Medical Equipment – 11.1% |  |
| Agilent Technologies, Inc. | 32176 | &nbsp;&nbsp;&nbsp; $3667421 |
| Bio-Rad Laboratories, Inc., "A" (a) | 6967 | &nbsp;&nbsp;&nbsp; 1942051 |
| Bio-Techne Corp. | 45113 | &nbsp;&nbsp;&nbsp; 2357605 |
| DexCom, Inc. (a) | 27463 | &nbsp;&nbsp;&nbsp; 1724676 |
| Masimo Corp. (a) | 42208 | &nbsp;&nbsp;&nbsp; 7507537 |
| Medline, Inc., "A" (a) | 51837 | &nbsp;&nbsp;&nbsp; 2306747 |
| Natera, Inc. (a) | 35695 | &nbsp;&nbsp;&nbsp; 7138643 |
| Repligen Corp. (a) | 21679 | &nbsp;&nbsp;&nbsp; 2554220 |
| STERIS PLC | 16202 | &nbsp;&nbsp;&nbsp; 3582748 |
| Waters Corp. (a) | 9306 | &nbsp;&nbsp;&nbsp; 2771327 |
|  |  | &nbsp;&nbsp;&nbsp; $35552975 |
| Metals & Mining – 2.2% | Metals & Mining – 2.2% |  |
| Alamos Gold, Inc. | 16934 | &nbsp;&nbsp;&nbsp; $753393 |
| Alcoa Corp. | 13541 | &nbsp;&nbsp;&nbsp; 898174 |
| Antofagasta PLC | 19588 | &nbsp;&nbsp;&nbsp; 871408 |
| Cameco Corp. | 42446 | &nbsp;&nbsp;&nbsp; 4610060 |
|  |  | &nbsp;&nbsp;&nbsp; $7133035 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Natural Gas - Pipeline – 3.1% | Natural Gas - Pipeline – 3.1% |  |
| Cheniere Energy, Inc. | 29082 | &nbsp;&nbsp;&nbsp; $8252308 |
| DT Midstream, Inc. | 9938 | &nbsp;&nbsp;&nbsp; 1338351 |
| Venture Global, Inc., "A" | 17880 | &nbsp;&nbsp;&nbsp; 281789 |
|  |  | &nbsp;&nbsp;&nbsp; $9872448 |
| Network & Telecom – 1.1% | Network & Telecom – 1.1% |  |
| Ciena Corp. (a)  | 8805 | &nbsp;&nbsp;&nbsp; $3418365 |
| Non-Global Systemically Important Banks – 0.4% | Non-Global Systemically Important Banks – 0.4% |  |
| Fifth Third Bancorp  | 25165 | &nbsp;&nbsp;&nbsp; $1169166 |
| Oil Services – 0.3% | Oil Services – 0.3% |  |
| TechnipFMC PLC  | 14149 | &nbsp;&nbsp;&nbsp; $978120 |
| Pharmaceuticals & Biotechnology – 3.6% | Pharmaceuticals & Biotechnology – 3.6% |  |
| Alnylam Pharmaceuticals, Inc. (a) | 8275 | &nbsp;&nbsp;&nbsp; $2737949 |
| Ascendis Pharma, ADR (a) | 31813 | &nbsp;&nbsp;&nbsp; 7276588 |
| Illumina, Inc. (a) | 10697 | &nbsp;&nbsp;&nbsp; 1318512 |
|  |  | &nbsp;&nbsp;&nbsp; $11333049 |
| Pollution Control – 0.9% | Pollution Control – 0.9% |  |
| GFL Environmental, Inc.  | 66896 | &nbsp;&nbsp;&nbsp; $2790901 |
| Real Estate – 1.4% | Real Estate – 1.4% |  |
| CBRE Group, Inc., "A" (a)  | 33092 | &nbsp;&nbsp;&nbsp; $4482642 |
| Restaurants – 2.8% | Restaurants – 2.8% |  |
| Aramark | 62056 | &nbsp;&nbsp;&nbsp; $2515750 |
| Cava Group, Inc. (a) | 8582 | &nbsp;&nbsp;&nbsp; 694284 |
| Performance Food Group Co. (a) | 26939 | &nbsp;&nbsp;&nbsp; 2307595 |
| Wingstop, Inc. | 23079 | &nbsp;&nbsp;&nbsp; 3576552 |
|  |  | &nbsp;&nbsp;&nbsp; $9094181 |
| Retail & E-commerce – 6.1% | Retail & E-commerce – 6.1% |  |
| BJ's Wholesale Club Holdings, Inc. (a) | 3618 | &nbsp;&nbsp;&nbsp; $356084 |
| Burlington Stores, Inc. (a) | 20854 | &nbsp;&nbsp;&nbsp; 6785475 |
| Coupang, Inc. (a) | 135414 | &nbsp;&nbsp;&nbsp; 2556616 |
| Floor & Decor Holdings, Inc., "A" (a) | 15730 | &nbsp;&nbsp;&nbsp; 799084 |
| Grab Holdings Ltd., "A" (a) | 182608 | &nbsp;&nbsp;&nbsp; 668345 |
| O'Reilly Automotive, Inc. (a) | 42909 | &nbsp;&nbsp;&nbsp; 3960930 |
| Tapestry, Inc. | 25488 | &nbsp;&nbsp;&nbsp; 3596612 |
| Tractor Supply Co. | 16811 | &nbsp;&nbsp;&nbsp; 761538 |
|  |  | &nbsp;&nbsp;&nbsp; $19484684 |
| Semiconductor & Electronic Components – 6.4% | Semiconductor & Electronic Components – 6.4% |  |
| ASM International N.V. | 3943 | &nbsp;&nbsp;&nbsp; $3003491 |
| Coherent Corp. (a) | 13436 | &nbsp;&nbsp;&nbsp; 3200590 |
| Jabil Circuit, Inc. | 9696 | &nbsp;&nbsp;&nbsp; 2575548 |
| MACOM Technology Solutions Holdings, Inc. (a) | 5031 | &nbsp;&nbsp;&nbsp; 1117234 |
| Monolithic Power Systems, Inc. | 9713 | &nbsp;&nbsp;&nbsp; 10619709 |
|  |  | &nbsp;&nbsp;&nbsp; $20516572 |
| Software – 5.3% | Software – 5.3% |  |
| Cadence Design Systems, Inc. (a) | 8755 | &nbsp;&nbsp;&nbsp; $2432752 |
| Cloudflare, Inc., "A" (a) | 25766 | &nbsp;&nbsp;&nbsp; 5316556 |
| Datadog, Inc., "A" (a) | 14800 | &nbsp;&nbsp;&nbsp; 1747140 |
| Guidewire Software, Inc. (a) | 21894 | &nbsp;&nbsp;&nbsp; 3274467 |
| MongoDB, Inc. (a) | 4770 | &nbsp;&nbsp;&nbsp; 1167553 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Software – continued | Software – continued |  |
| Okta, Inc. (a) | 37189 | &nbsp;&nbsp;&nbsp; $2927146 |
|  |  | &nbsp;&nbsp;&nbsp; $16865614 |
| Travel, Gaming, & Lodging – 5.8% | Travel, Gaming, & Lodging – 5.8% |  |
| Carnival Corp. | 96385 | &nbsp;&nbsp;&nbsp; $2494444 |
| DraftKings, Inc. (a) | 124509 | &nbsp;&nbsp;&nbsp; 2691885 |
| Hyatt Hotels Corp. | 30460 | &nbsp;&nbsp;&nbsp; 4379843 |
| Royal Caribbean Cruises Ltd. | 9173 | &nbsp;&nbsp;&nbsp; 2524226 |
| Sportradar Group AG (a) | 90962 | &nbsp;&nbsp;&nbsp; 1522704 |
| Viking Holdings Ltd. (a) | 66603 | &nbsp;&nbsp;&nbsp; 4893988 |
|  |  | &nbsp;&nbsp;&nbsp; $18507090 |
| Utilities – 1.9% | Utilities – 1.9% |  |
| Vistra Corp.  | 41015 | &nbsp;&nbsp;&nbsp; $6165785 |
| **Total Common Stocks**  |  | &nbsp;&nbsp; **$316743581** |

---

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

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Strike** <br>**Price**<br>| &nbsp;&nbsp; **First** <br>**Exercise**<br>|  |  |
| Warrants – 0.0% |  |  |  |  |
| Software – 0.0% | Software – 0.0% | Software – 0.0% | Software – 0.0% | Software – 0.0% |
| Constellation Software, Inc. (CAD 100 principal amount of Series 2 Debentures for 1 warrant, Expiration <br> 3/31/40) (a)<br>| CAD 11.5 | N/A | &nbsp;&nbsp;&nbsp;&nbsp; 2984 | &nbsp;&nbsp;&nbsp; $0 |

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

---

| | | |
|:---|:---|:---|
| Mutual Funds (h) – 1.5%  | Mutual Funds (h) – 1.5%  | Mutual Funds (h) – 1.5%  |
| Money Market Funds – 1.5% | Money Market Funds – 1.5% |  |
| MFS Institutional Money Market Portfolio, 3.71% (v)  | 4867406 | &nbsp;&nbsp;&nbsp; $4867406 |
| Other Assets, Less Liabilities – (0.6)% |  | &nbsp;&nbsp;&nbsp; (1865946)<br>|
| **Net Assets – 100.0%** | **Net Assets – 100.0%** | &nbsp;&nbsp; **$319745041** |

---

&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 $4,867,406 and $316,743,581, 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;

---

| | |
|:---|:---|
| The following abbreviations are used in this report and are defined: | The following abbreviations are used in this report and are defined: |
| ADR | American Depositary Receipt |
| 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 |

---

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

------

**Supplemental Information**

3/31/26 (unaudited)

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial

Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

**(1) Investment Valuations**

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. 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

------

*Supplemental Information (unaudited) – continued*

significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of March 31, 2026 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; $289661487 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $289661487 |
| &nbsp;&nbsp;&nbsp; Canada | &nbsp;&nbsp;&nbsp; 8154354 | &nbsp;&nbsp;&nbsp; 0 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 8154354 |
| &nbsp;&nbsp;&nbsp; Denmark | &nbsp;&nbsp;&nbsp; 7276588 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 7276588 |
| &nbsp;&nbsp;&nbsp; Netherlands | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 3003491 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 3003491 |
| &nbsp;&nbsp;&nbsp; South Korea | &nbsp;&nbsp;&nbsp; 2556616 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 2556616 |
| &nbsp;&nbsp;&nbsp; Finland | &nbsp;&nbsp;&nbsp; 1641260 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1641260 |
| &nbsp;&nbsp;&nbsp; Switzerland | &nbsp;&nbsp;&nbsp; 1522704 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1522704 |
| &nbsp;&nbsp;&nbsp; Sweden | &nbsp;&nbsp;&nbsp; 1387328 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1387328 |
| &nbsp;&nbsp;&nbsp; United Kingdom | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 871408 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 871408 |
| &nbsp;&nbsp;&nbsp; Other Countries | &nbsp;&nbsp;&nbsp; 668345 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 668345 |
| Investment Companies | &nbsp;&nbsp;&nbsp; 4867406 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 4867406 |
| Total | &nbsp;&nbsp;&nbsp; $317736088 | &nbsp;&nbsp;&nbsp; $3874899 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $321610987 |

---

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. The following were affiliated issuers for the period ended March 31, 2026:

&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; $3784111 | &nbsp;&nbsp; $23621223 | &nbsp;&nbsp; $22536891 | &nbsp;&nbsp; $(430)<br>| &nbsp;&nbsp; $(607)<br>| &nbsp;&nbsp; $4867406<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; $42289 | &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 Mid Cap Growth Series

- **b. EDGAR series identifier (if any):** S000002678

- **c. LEI of Series:** DQS0BFT7TBCF2MYV2M94

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

- **a. Date of fiscal year-end:** 2026-12-31

- **b. Date as of which information is reported:** 2026-03-31

**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:** $319602507.47

**Total Liabilities:** $198957.44

**Net Assets:** $319403550.03

**Cash Not Reported:** $56.79

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000007326 | -0.63%               | 0.63%                | -6.27%               |
| Class ID C000007327 | -0.76%               | 0.61%                | -6.25%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $4399805.34              | $-6154632.64                               |
| Month 2  | $-2406057.20             | $4537551.46                                |
| Month 3  | $330557.58               | $-21872171.46                              |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Antofagasta PLC                              | Antofagasta PLC                              | CUSIP: 000000000<br>LEI: 213800MY6QVH4FVLD628 | Long             | EC               | CORP              | GB        |     12286 | NS      | $546564.94    | 0.17%             |  |  |  | No            |                  2 | On Loan: No      |
| Agilent Technologies Inc                     | Agilent Technologies Inc                     | CUSIP: 00846U101<br>LEI: QUIX8Y7A2WP0XRMW7G29 | Long             | EC               | CORP              | US        |     31993 | NS      | $3646562.14   | 1.14%             |  |  |  | No            |                  1 | On Loan: No      |
| Alamos Gold Inc                              | Alamos Gold Inc                              | CUSIP: 011532108<br>LEI: 894500GIHFJZW7YS9660 | Long             | EC               | CORP              | CA        |     16838 | NS      | $749122.15    | 0.23%             |  |  |  | No            |                  1 | On Loan: No      |
| Alcoa Corp                                   | Alcoa Corp                                   | CUSIP: 013872106<br>LEI: 549300T12EZ1F6PWWU29 | Long             | EC               | CORP              | US        |     13464 | NS      | $893067.12    | 0.28%             |  |  |  | No            |                  1 | On Loan: No      |
| Alnylam Pharmaceuticals Inc                  | Alnylam Pharmaceuticals Inc                  | CUSIP: 02043Q107<br>LEI: 529900S3ZI14OWRJII50 | Long             | EC               | CORP              | US        |      8228 | NS      | $2722398.36   | 0.85%             |  |  |  | No            |                  1 | On Loan: No      |
| AMETEK Inc                                   | AMETEK Inc                                   | CUSIP: 031100100<br>LEI: 549300WZDEF9KKE40E98 | Long             | EC               | CORP              | US        |     11296 | NS      | $2421410.56   | 0.76%             |  |  |  | No            |                  1 | On Loan: No      |
| Antero Resources Corp                        | Antero Resources Corp                        | CUSIP: 03674X106<br>LEI: APVBKPOULHUX7YZLKU17 | Long             | EC               | CORP              | US        |     46520 | NS      | $1974308.80   | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| Applied Industrial Technologies Inc          | Applied Industrial Technologies Inc          | CUSIP: 03820C105<br>LEI: 549300NU173IJRC6PO38 | Long             | EC               | CORP              | US        |      5465 | NS      | $1449973.80   | 0.45%             |  |  |  | No            |                  1 | On Loan: No      |
| Aramark                                      | Aramark                                      | CUSIP: 03852U106<br>LEI: 549300MR6PG2DWZUIL39 | Long             | EC               | CORP              | US        |     61703 | NS      | $2501439.62   | 0.78%             |  |  |  | No            |                  1 | On Loan: No      |
| Ares Management Corp                         | Ares Management Corp                         | CUSIP: 03990B101<br>LEI: 529900JUV61FH7B8VW38 | Long             | EC               | CORP              | US        |      9947 | NS      | $1085217.70   | 0.34%             |  |  |  | No            |                  1 | On Loan: No      |
| Ascendis Pharma A/S                          | Ascendis Pharma A/S                          | CUSIP: 04351P101<br>LEI: 549300B66JN3W3J8GH73 | Long             | EC               | CORP              | DK        |     31632 | NS      | $7235187.36   | 2.27%             |  |  |  | No            |                  1 | On Loan: No      |
| Axon Enterprise Inc                          | Axon Enterprise Inc                          | CUSIP: 05464C101<br>LEI: 549300QP2IEEGFE16681 | Long             | EC               | CORP              | US        |     11930 | NS      | $5066551.70   | 1.59%             |  |  |  | No            |                  1 | On Loan: No      |
| BJ's Wholesale Club Holdings Inc             | BJ's Wholesale Club Holdings Inc             | CUSIP: 05550J101<br>LEI: 549300UCIWH1C93V0J03 | Long             | EC               | CORP              | US        |      3597 | NS      | $354016.74    | 0.11%             |  |  |  | No            |                  1 | On Loan: No      |
| BWX Technologies Inc                         | BWX Technologies Inc                         | CUSIP: 05605H100<br>LEI: 549300NP85N265KWMS58 | Long             | EC               | CORP              | US        |     17291 | NS      | $3535836.59   | 1.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Bio-Rad Laboratories Inc                     | Bio-Rad Laboratories Inc                     | CUSIP: 090572207<br>LEI: 549300ZC1GPV35XYDK53 | Long             | EC               | CORP              | US        |      6927 | NS      | $1930901.25   | 0.60%             |  |  |  | No            |                  1 | On Loan: No      |
| Bio-Techne Corp                              | Bio-Techne Corp                              | CUSIP: 09073M104<br>LEI: 54930073RLKQ51TILZ35 | Long             | EC               | CORP              | US        |     44856 | NS      | $2344174.56   | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| Bloom Energy Corp                            | Bloom Energy Corp                            | CUSIP: 093712107<br>LEI: 549300XB5J9BFW5JXV97 | Long             | EC               | CORP              | US        |      7442 | NS      | $1008316.58   | 0.32%             |  |  |  | No            |                  1 | On Loan: No      |
| Burlington Stores Inc                        | Burlington Stores Inc                        | CUSIP: 122017106<br>LEI: 5299003Z37DVGKKC1W09 | Long             | EC               | CORP              | US        |     20735 | NS      | $6746754.30   | 2.11%             |  |  |  | No            |                  1 | On Loan: No      |
| CBRE Group Inc                               | CBRE Group Inc                               | CUSIP: 12504L109<br>LEI: 52990016II9MJ2OSWA10 | Long             | EC               | CORP              | US        |     32904 | NS      | $4457175.84   | 1.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Cadence Design Systems Inc                   | Cadence Design Systems Inc                   | CUSIP: 127387108<br>LEI: GCT7RXJOGLXPV0NXZY22 | Long             | EC               | CORP              | US        |      8705 | NS      | $2418858.35   | 0.76%             |  |  |  | No            |                  1 | On Loan: No      |
| Cameco Corp                                  | Cameco Corp                                  | CUSIP: 13321L108<br>LEI: N4BHALMXL3GMZKCUON55 | Long             | EC               | CORP              | CA        |     42204 | NS      | $4583776.44   | 1.44%             |  |  |  | No            |                  1 | On Loan: No      |
| Carlyle Group Inc/The                        | Carlyle Group Inc/The                        | CUSIP: 14316J108<br>LEI: 529900NGGVF94UK6PG95 | Long             | EC               | CORP              | US        |     91216 | NS      | $4413942.24   | 1.38%             |  |  |  | No            |                  1 | On Loan: No      |
| Carnival Corp                                | Carnival Corp                                | CUSIP: 143658300<br>LEI: F1OF2ZSX47CR0BCWA982 | Long             | EC               | CORP              | PA        |     95836 | NS      | $2480235.68   | 0.78%             |  |  |  | No            |                  1 | On Loan: No      |
| Carvana Co                                   | Carvana Co                                   | CUSIP: 146869102<br>LEI: 5493003WEAK2PJ5WS063 | Long             | EC               | CORP              | US        |     14101 | NS      | $4433072.38   | 1.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Cava Group Inc                               | Cava Group Inc                               | CUSIP: 148929102<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      8533 | NS      | $690319.70    | 0.22%             |  |  |  | No            |                  1 | On Loan: No      |
| Celsius Holdings Inc                         | Celsius Holdings Inc                         | CUSIP: 15118V207<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     52744 | NS      | $1871357.12   | 0.59%             |  |  |  | No            |                  1 | On Loan: No      |
| Charles River Laboratories International Inc | Charles River Laboratories International Inc | CUSIP: 159864107<br>LEI: 549300BSQ0R4UZ5KX287 | Long             | EC               | CORP              | US        |     10721 | NS      | $1849372.50   | 0.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Cheniere Energy Inc                          | Cheniere Energy Inc                          | CUSIP: 16411R208<br>LEI: MIHC87W9WTYSYZWV1J40 | Long             | EC               | CORP              | US        |     28916 | NS      | $8205204.16   | 2.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Expand Energy Corp                           | Expand Energy Corp                           | CUSIP: 165167735<br>LEI: X2MT1W32SPAZ9WSKLE78 | Long             | EC               | CORP              | US        |     30278 | NS      | $3323918.84   | 1.04%             |  |  |  | No            |                  1 | On Loan: No      |
| Ciena Corp                                   | Ciena Corp                                   | CUSIP: 171779309<br>LEI: W0CZ7N0GH8UIGXDM1H41 | Long             | EC               | CORP              | US        |      8755 | NS      | $3398953.65   | 1.06%             |  |  |  | No            |                  1 | On Loan: No      |
| Cloudflare Inc                               | Cloudflare Inc                               | CUSIP: 18915M107<br>LEI: 5493007DY18BGNLDWU14 | Long             | EC               | CORP              | US        |     25619 | NS      | $5286224.46   | 1.66%             |  |  |  | No            |                  1 | On Loan: No      |
| Coherent Corp                                | Coherent Corp                                | CUSIP: 19247G107<br>LEI: 549300O5C25A0MMHHU33 | Long             | EC               | CORP              | US        |     13359 | NS      | $3182247.39   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| CONSTELLATION SOFTWARE INC                   | CONSTELLATION SOFTWARE INC                   | CUSIP: 000000000<br>LEI: 549300B6PYHMCTDWQV29 | N/A              | DE               |  | CA        |      2984 | NS      | $0.00         | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Coupang Inc                                  | Coupang Inc                                  | CUSIP: 22266T109<br>LEI: 549300XR4L1D80AK4W76 | Long             | EC               | CORP              | US        |    134643 | NS      | $2542059.84   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| Curtiss-Wright Corp                          | Curtiss-Wright Corp                          | CUSIP: 231561101<br>LEI: TEL51ETZWP7D0ZM4X325 | Long             | EC               | CORP              | US        |      6106 | NS      | $4158918.72   | 1.30%             |  |  |  | No            |                  1 | On Loan: No      |
| DT Midstream Inc                             | DT Midstream Inc                             | CUSIP: 23345M107<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      9881 | NS      | $1330674.27   | 0.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Datadog Inc                                  | Datadog Inc                                  | CUSIP: 23804L103<br>LEI: 549300F6JNO0KRPO1K63 | Long             | EC               | CORP              | US        |     14716 | NS      | $1737223.80   | 0.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Dexcom Inc                                   | Dexcom Inc                                   | CUSIP: 252131107<br>LEI: 549300YSK3QDSFR5EU59 | Long             | EC               | CORP              | US        |     27307 | NS      | $1714879.60   | 0.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Donaldson Co Inc                             | Donaldson Co Inc                             | CUSIP: 257651109<br>LEI: OZE6KXY9QQPR8EJ8WL20 | Long             | EC               | CORP              | US        |     11209 | NS      | $951307.83    | 0.30%             |  |  |  | No            |                  1 | On Loan: No      |
| DraftKings Inc                               | DraftKings Inc                               | CUSIP: 26142V105<br>LEI: 2549006G33IUL6IVOD83 | Long             | EC               | CORP              | US        |    123800 | NS      | $2676556.00   | 0.84%             |  |  |  | No            |                  1 | On Loan: No      |
| EMCOR Group Inc                              | EMCOR Group Inc                              | CUSIP: 29084Q100<br>LEI: 529900X0SQJB2J7YDU43 | Long             | EC               | CORP              | US        |      5475 | NS      | $4042247.25   | 1.27%             |  |  |  | No            |                  1 | On Loan: No      |
| Ferguson Enterprises Inc                     | Ferguson Enterprises Inc                     | CUSIP: 31488V107<br>LEI: 2138003JYQMRP3SLX189 | Long             | EC               | CORP              | US        |      3863 | NS      | $901083.38    | 0.28%             |  |  |  | No            |                  1 | On Loan: No      |
| Fifth Third Bancorp                          | Fifth Third Bancorp                          | CUSIP: 316773100<br>LEI: THRNG6BD57P9QWTQLG42 | Long             | EC               | CORP              | US        |     25022 | NS      | $1162522.12   | 0.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Floor & Decor Holdings Inc                   | Floor & Decor Holdings Inc                   | CUSIP: 339750101<br>LEI: 549300M5FR3N688XGQ36 | Long             | EC               | CORP              | US        |     15640 | NS      | $794512.00    | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| GFL Environmental Inc                        | GFL Environmental Inc                        | CUSIP: 36168Q104<br>LEI: 894500E7NLBY9VZRT696 | Long             | EC               | CORP              | CA        |     66515 | NS      | $2775005.80   | 0.87%             |  |  |  | No            |                  1 | On Loan: No      |
| Generac Holdings Inc                         | Generac Holdings Inc                         | CUSIP: 368736104<br>LEI: 529900S2H2AHJHSFFI84 | Long             | EC               | CORP              | US        |      6256 | NS      | $1221984.48   | 0.38%             |  |  |  | No            |                  1 | On Loan: No      |
| Guidewire Software Inc                       | Guidewire Software Inc                       | CUSIP: 40171V100<br>LEI: 549300WXSG0J8IXZCK32 | Long             | EC               | CORP              | US        |     21769 | NS      | $3255771.64   | 1.02%             |  |  |  | No            |                  1 | On Loan: No      |
| Hexcel Corp                                  | Hexcel Corp                                  | CUSIP: 428291108<br>LEI: S6Q7LW43WUBUHXY2QP69 | Long             | EC               | CORP              | US        |     37199 | NS      | $3010515.07   | 0.94%             |  |  |  | No            |                  1 | On Loan: No      |
| Howmet Aerospace Inc                         | Howmet Aerospace Inc                         | CUSIP: 443201108<br>LEI: 549300HO5WFZUT5N2T22 | Long             | EC               | CORP              | US        |     57478 | NS      | $13246379.88  | 4.15%             |  |  |  | No            |                  1 | On Loan: No      |
| Hubbell Inc                                  | Hubbell Inc                                  | CUSIP: 443510607<br>LEI: 54930088VDQ6840Y6597 | Long             | EC               | CORP              | US        |      6087 | NS      | $2987134.38   | 0.94%             |  |  |  | No            |                  1 | On Loan: No      |
| Huntington Ingalls Industries Inc            | Huntington Ingalls Industries Inc            | CUSIP: 446413106<br>LEI: 5TZLZ6WJTBVJ0QWBG121 | Long             | EC               | CORP              | US        |      4408 | NS      | $1674599.20   | 0.52%             |  |  |  | No            |                  1 | On Loan: No      |
| Hyatt Hotels Corp                            | Hyatt Hotels Corp                            | CUSIP: 448579102<br>LEI: T27JQIMTYSH41TCD5186 | Long             | EC               | CORP              | US        |     30287 | NS      | $4354967.73   | 1.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Illumina Inc                                 | Illumina Inc                                 | CUSIP: 452327109<br>LEI: SQ95QG8SR5Q56LSNF682 | Long             | EC               | CORP              | US        |     10636 | NS      | $1310993.36   | 0.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Ingersoll Rand Inc                           | Ingersoll Rand Inc                           | CUSIP: 45687V106<br>LEI: 5299004C02FMZCUOIR50 | Long             | EC               | CORP              | US        |     12543 | NS      | $1004945.16   | 0.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Jabil Inc                                    | Jabil Inc                                    | CUSIP: 466313103<br>LEI: 5493000CGCQY2OQU7669 | Long             | EC               | CORP              | US        |      9641 | NS      | $2560938.83   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| LPL Financial Holdings Inc                   | LPL Financial Holdings Inc                   | CUSIP: 50212V100<br>LEI: 549300XROQ4Y8G2L7682 | Long             | EC               | CORP              | US        |     22396 | NS      | $6737388.68   | 2.11%             |  |  |  | No            |                  1 | On Loan: No      |
| ASM International NV                         | ASM International NV                         | CUSIP: 000000000<br>LEI: 7245001I22ND6ZFHX623 | Long             | EC               | CORP              | NL        |      3921 | NS      | $2986733.38   | 0.94%             |  |  |  | No            |                  2 | On Loan: No      |
| Liberty Media Corp-Liberty Formula One       | Liberty Media Corp-Liberty Formula One       | CUSIP: 531229755<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     12698 | NS      | $1079583.96   | 0.34%             |  |  |  | No            |                  1 | On Loan: No      |
| Lincoln Electric Holdings Inc                | Lincoln Electric Holdings Inc                | CUSIP: 533900106<br>LEI: BIMGBY40SIN95O01BN93 | Long             | EC               | CORP              | US        |      4244 | NS      | $1057095.52   | 0.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Live Nation Entertainment Inc                | Live Nation Entertainment Inc                | CUSIP: 538034109<br>LEI: 5493007B9BM9ZXJINO78 | Long             | EC               | CORP              | US        |     53578 | NS      | $8171180.78   | 2.56%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Institutional Money Market Portfolio     | MFS Institutional Money Market Portfolio     | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | EC               | RF                | US        |   4854134 | NS      | $4854134.12   | 1.52%             |  |  |  | No            |                  1 | On Loan: No      |
| MACOM Technology Solutions Holdings Inc      | MACOM Technology Solutions Holdings Inc      | CUSIP: 55405Y100<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      5002 | NS      | $1110794.14   | 0.35%             |  |  |  | No            |                  1 | On Loan: No      |
| Masimo Corp                                  | Masimo Corp                                  | CUSIP: 574795100<br>LEI: 549300Q4A8JK0PIYCU29 | Long             | EC               | CORP              | US        |     41968 | NS      | $7464848.16   | 2.34%             |  |  |  | No            |                  1 | On Loan: No      |
| Medline Inc                                  | Medline Inc                                  | CUSIP: 58507V107<br>LEI: 984500FAN6J1P8566D43 | Long             | EC               | CORP              | US        |     51542 | NS      | $2293619.00   | 0.72%             |  |  |  | No            |                  1 | On Loan: No      |
| MiniMed Group Inc                            | MiniMed Group Inc                            | CUSIP: 60365F109<br>LEI: 254900MS5BIVZH51VD96 | Long             | EC               | CORP              | US        |     18155 | NS      | $270872.60    | 0.08%             |  |  |  | No            |                  1 | On Loan: No      |
| Modine Manufacturing Co                      | Modine Manufacturing Co                      | CUSIP: 607828100<br>LEI: Z35SZFYJR8GZZRSIUU09 | Long             | EC               | CORP              | US        |      5963 | NS      | $1292241.73   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| MongoDB Inc                                  | MongoDB Inc                                  | CUSIP: 60937P106<br>LEI: 549300TPTG69WKWE1Z37 | Long             | EC               | CORP              | US        |      4743 | NS      | $1160944.11   | 0.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Monolithic Power Systems Inc                 | Monolithic Power Systems Inc                 | CUSIP: 609839105<br>LEI: 529900TB7O85LSZ1XU31 | Long             | EC               | CORP              | US        |      9658 | NS      | $10559574.30  | 3.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Nasdaq Inc                                   | Nasdaq Inc                                   | CUSIP: 631103108<br>LEI: 549300L8X1Q78ERXFD06 | Long             | EC               | CORP              | US        |     65753 | NS      | $5581772.17   | 1.75%             |  |  |  | No            |                  1 | On Loan: No      |
| Natera Inc                                   | Natera Inc                                   | CUSIP: 632307104<br>LEI: 529900CQ3OZ0A0VYVU59 | Long             | EC               | CORP              | US        |     35492 | NS      | $7098045.08   | 2.22%             |  |  |  | No            |                  1 | On Loan: No      |
| New York Times Co/The                        | New York Times Co/The                        | CUSIP: 650111107<br>LEI: 529900J1WEMMIW7BOH57 | Long             | EC               | CORP              | US        |      3764 | NS      | $315159.72    | 0.10%             |  |  |  | No            |                  1 | On Loan: No      |
| Nordson Corp                                 | Nordson Corp                                 | CUSIP: 655663102<br>LEI: 14OS6Q5N55N95WM84M53 | Long             | EC               | CORP              | US        |      4174 | NS      | $1110534.44   | 0.35%             |  |  |  | No            |                  1 | On Loan: No      |
| O'Reilly Automotive Inc                      | O'Reilly Automotive Inc                      | CUSIP: 67103H107<br>LEI: 549300K2RLMQL149Q332 | Long             | EC               | CORP              | US        |     42665 | NS      | $3938406.15   | 1.23%             |  |  |  | No            |                  1 | On Loan: No      |
| Okta Inc                                     | Okta Inc                                     | CUSIP: 679295105<br>LEI: 549300N8J06I8MRHU620 | Long             | EC               | CORP              | US        |     36977 | NS      | $2910459.67   | 0.91%             |  |  |  | No            |                  1 | On Loan: No      |
| Ovintiv Inc                                  | Ovintiv Inc                                  | CUSIP: 69047Q102<br>LEI: 2549003MEX7YMKLGI239 | Long             | EC               | CORP              | US        |     19427 | NS      | $1153186.72   | 0.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Performance Food Group Co                    | Performance Food Group Co                    | CUSIP: 71377A103<br>LEI: 549300EUK8GR9IT1YK57 | Long             | EC               | CORP              | US        |     26786 | NS      | $2294488.76   | 0.72%             |  |  |  | No            |                  1 | On Loan: No      |
| Quanta Services Inc                          | Quanta Services Inc                          | CUSIP: 74762E102<br>LEI: SHVRXXEACT60MMH07S24 | Long             | EC               | CORP              | US        |     16814 | NS      | $9231222.28   | 2.89%             |  |  |  | No            |                  1 | On Loan: No      |
| RBC Bearings Inc                             | RBC Bearings Inc                             | CUSIP: 75524B104<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      4899 | NS      | $2660744.88   | 0.83%             |  |  |  | No            |                  1 | On Loan: No      |
| Repligen Corp                                | Repligen Corp                                | CUSIP: 759916109<br>LEI: 54930006QJ0T5AUO1E71 | Long             | EC               | CORP              | US        |     21556 | NS      | $2539727.92   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| Robinhood Markets Inc                        | Robinhood Markets Inc                        | CUSIP: 770700102<br>LEI: 213800FS5AO3YWIE6F63 | Long             | EC               | CORP              | US        |     18023 | NS      | $1248993.90   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| ROBLOX Corp                                  | ROBLOX Corp                                  | CUSIP: 771049103<br>LEI: 529900ANZDBDFU91SO19 | Long             | EC               | CORP              | US        |     79414 | NS      | $4491655.84   | 1.41%             |  |  |  | No            |                  1 | On Loan: No      |
| TKO Group Holdings Inc                       | TKO Group Holdings Inc                       | CUSIP: 87256C101<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     35803 | NS      | $7219674.95   | 2.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Take-Two Interactive Software Inc            | Take-Two Interactive Software Inc            | CUSIP: 874054109<br>LEI: BOMSTHHJK882EWYX3334 | Long             | EC               | CORP              | US        |     46730 | NS      | $9229175.00   | 2.89%             |  |  |  | No            |                  1 | On Loan: No      |
| Tapestry Inc                                 | Tapestry Inc                                 | CUSIP: 876030107<br>LEI: 549300LJNVY5SW3VTN33 | Long             | EC               | CORP              | US        |     25343 | NS      | $3576150.73   | 1.12%             |  |  |  | No            |                  1 | On Loan: No      |
| TopBuild Corp                                | TopBuild Corp                                | CUSIP: 89055F103<br>LEI: 5493007YSKHOL4RWII46 | Long             | EC               | CORP              | US        |      1581 | NS      | $555405.30    | 0.17%             |  |  |  | No            |                  1 | On Loan: No      |
| Tractor Supply Co                            | Tractor Supply Co                            | CUSIP: 892356106<br>LEI: 549300OJ9VZHZRO6I137 | Long             | EC               | CORP              | US        |     16715 | NS      | $757189.50    | 0.24%             |  |  |  | No            |                  1 | On Loan: No      |
| TransUnion                                   | TransUnion                                   | CUSIP: 89400J107<br>LEI: 549300ZS772LUNUMRB03 | Long             | EC               | CORP              | US        |     18023 | NS      | $1247011.37   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Trimble Inc                                  | Trimble Inc                                  | CUSIP: 896239100<br>LEI: 549300E2MI7NSZFQWS19 | Long             | EC               | CORP              | US        |     49492 | NS      | $3228363.16   | 1.01%             |  |  |  | No            |                  1 | On Loan: No      |
| VF Corp                                      | VF Corp                                      | CUSIP: 918204108<br>LEI: CWAJJ9DJ5Z7P057HV541 | Long             | EC               | CORP              | US        |     74840 | NS      | $1271531.60   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Venture Global Inc                           | Venture Global Inc                           | CUSIP: 92333F101<br>LEI: 2549007XC91CAB3E0N98 | Long             | EC               | CORP              | US        |     17778 | NS      | $280181.28    | 0.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Vertiv Holdings Co                           | Vertiv Holdings Co                           | CUSIP: 92537N108<br>LEI: 549300KTTIRAOGXCRV69 | Long             | EC               | CORP              | US        |     12956 | NS      | $3246514.48   | 1.02%             |  |  |  | No            |                  1 | On Loan: No      |
| Vistra Corp                                  | Vistra Corp                                  | CUSIP: 92840M102<br>LEI: 549300KP43CPCUJOOG15 | Long             | EC               | CORP              | US        |     40781 | NS      | $6130607.73   | 1.92%             |  |  |  | No            |                  1 | On Loan: No      |
| Vulcan Materials Co                          | Vulcan Materials Co                          | CUSIP: 929160109<br>LEI: 549300Q8LSNHAVWBNI21 | Long             | EC               | CORP              | US        |     17560 | NS      | $4781588.00   | 1.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Waters Corp                                  | Waters Corp                                  | CUSIP: 941848103<br>LEI: 5T547R1474YC9HOD8Q74 | Long             | EC               | CORP              | US        |      9253 | NS      | $2755543.40   | 0.86%             |  |  |  | No            |                  1 | On Loan: No      |
| Wingstop Inc                                 | Wingstop Inc                                 | CUSIP: 974155103<br>LEI: 549300SSH3F8HPIM3Q47 | Long             | EC               | CORP              | US        |     22948 | NS      | $3556251.56   | 1.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Woodward Inc                                 | Woodward Inc                                 | CUSIP: 980745103<br>LEI: YPYKXXTR8TFDH54ZMB45 | Long             | EC               | CORP              | US        |      5732 | NS      | $2051597.44   | 0.64%             |  |  |  | No            |                  1 | On Loan: No      |
| CANADIAN DOLLAR                              | CANADIAN DOLLAR                              | CUSIP: 000000000<br>LEI: N/A                  | Long             |  |  | CA        |        29 | NS      | $21.20        | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Amer Sports Inc                              | Amer Sports Inc                              | CUSIP: 000000000<br>LEI: 391200YCSWTRD1J21867 | Long             | EC               | CORP              | KY        |     49572 | NS      | $1631910.24   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |
| Grab Holdings Ltd                            | Grab Holdings Ltd                            | CUSIP: 000000000<br>LEI: 549300N4VQX83VPJF439 | Long             | EC               | CORP              | KY        |    181568 | NS      | $664538.88    | 0.21%             |  |  |  | No            |                  1 | On Loan: No      |
| Seagate Technology Holdings PLC              | Seagate Technology Holdings PLC              | CUSIP: 000000000<br>LEI: 635400RUXIFEZSRU8X70 | Long             | EC               | CORP              | IE        |      6771 | NS      | $2652606.96   | 0.83%             |  |  |  | No            |                  1 | On Loan: No      |
| STERIS PLC                                   | STERIS PLC                                   | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | IE        |     16110 | NS      | $3562404.30   | 1.12%             |  |  |  | No            |                  1 | On Loan: No      |
| TechnipFMC PLC                               | TechnipFMC PLC                               | CUSIP: 000000000<br>LEI: 549300D5I93QWCJTCK36 | Long             | EC               | CORP              | GB        |     14068 | NS      | $972520.84    | 0.30%             |  |  |  | No            |                  1 | On Loan: No      |
| Viking Holdings Ltd                          | Viking Holdings Ltd                          | CUSIP: 000000000<br>LEI: 52990032GOPN7BVQMN13 | Long             | EC               | CORP              | BM        |     66224 | NS      | $4866139.52   | 1.52%             |  |  |  | No            |                  1 | On Loan: No      |
| Sportradar Group AG                          | Sportradar Group AG                          | CUSIP: 000000000<br>LEI: 549300H1P33YOAT7Z533 | Long             | EC               | CORP              | CH        |     90444 | NS      | $1514032.56   | 0.47%             |  |  |  | No            |                  1 | On Loan: No      |
| Spotify Technology SA                        | Spotify Technology SA                        | CUSIP: 000000000<br>LEI: 549300B4X0JHWV0DTD60 | Long             | EC               | CORP              | LU        |      2845 | NS      | $1379568.95   | 0.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Royal Caribbean Cruises Ltd                  | Royal Caribbean Cruises Ltd                  | CUSIP: 000000000<br>LEI: K2NEH8QNVW44JIWK7Z55 | Long             | EC               | CORP              | LR        |      9121 | NS      | $2509916.78   | 0.79%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-04-29

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

**Signature:** James Byrne

**Name of Signer:** James Byrne

**Title:** Assistant Treasurer