# EDGAR Filing Document

**Accession Number:** 0000918571
**File Stem:** 0001410368-25-028901
**Filing Date:** 2025-11
**Character Count:** 60441
**Document Hash:** b423140f7a51f5d72846cff4602c7610
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-028901.hdr.sgml**: 20251124

**ACCESSION NUMBER**: 0001410368-25-028901

**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:** 251509785

**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-Q3

![](img42fe27291.gif)

**Quarterly Report**

September 30, 2025

MFS<sup>®</sup> Mid Cap Growth Series

![](imga4a649052.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%  |
| Aerospace & Defense – 9.3% | Aerospace & Defense – 9.3% |  |
| Axon Enterprise, Inc. (a) | 11273 | &nbsp;&nbsp;&nbsp; $8089956 |
| BWX Technologies, Inc. | 18222 | &nbsp;&nbsp;&nbsp; 3359590 |
| Curtiss-Wright Corp. | 5771 | &nbsp;&nbsp;&nbsp; 3133307 |
| Hexcel Corp. | 23584 | &nbsp;&nbsp;&nbsp; 1478717 |
| Howmet Aerospace, Inc. | 75671 | &nbsp;&nbsp;&nbsp; 14848920 |
| Melrose Industries PLC | 145029 | &nbsp;&nbsp;&nbsp; 1194933 |
| Mirion Technologies, Inc. (a) | 51762 | &nbsp;&nbsp;&nbsp; 1203984 |
|  |  | &nbsp;&nbsp;&nbsp; $33309407 |
| Apparel Manufacturers – 0.3% | Apparel Manufacturers – 0.3% |  |
| Amer Sports, Inc. (a) | 18964 | &nbsp;&nbsp;&nbsp; $658999 |
| VF Corp. | 26927 | &nbsp;&nbsp;&nbsp; 388557 |
|  |  | &nbsp;&nbsp;&nbsp; $1047556 |
| Automotive – 1.5% | Automotive – 1.5% |  |
| ACV Auctions, Inc. (a) | 73166 | &nbsp;&nbsp;&nbsp; $725075 |
| Carvana Co. (a) | 10537 | &nbsp;&nbsp;&nbsp; 3974978 |
| Copart, Inc. (a) | 14298 | &nbsp;&nbsp;&nbsp; 642981 |
|  |  | &nbsp;&nbsp;&nbsp; $5343034 |
| Biotechnology – 0.7% | Biotechnology – 0.7% |  |
| Exact Sciences Corp. (a)  | 48507 | &nbsp;&nbsp;&nbsp; $2653818 |
| Broadcasting – 4.7% | Broadcasting – 4.7% |  |
| Spotify Technology S.A. (a) | 14550 | &nbsp;&nbsp;&nbsp; $10155900 |
| TKO Group Holdings, Inc. | 33830 | &nbsp;&nbsp;&nbsp; 6832307 |
|  |  | &nbsp;&nbsp;&nbsp; $16988207 |
| Brokerage & Asset Managers – 9.1% | Brokerage & Asset Managers – 9.1% |  |
| Ares Management Co. | 33229 | &nbsp;&nbsp;&nbsp; $5312985 |
| Carlyle Group, Inc. | 83181 | &nbsp;&nbsp;&nbsp; 5215449 |
| LPL Financial Holdings, Inc. | 20489 | &nbsp;&nbsp;&nbsp; 6816485 |
| NASDAQ, Inc. | 58361 | &nbsp;&nbsp;&nbsp; 5162030 |
| Robinhood Markets, Inc. (a) | 51505 | &nbsp;&nbsp;&nbsp; 7374486 |
| TPG, Inc. | 47080 | &nbsp;&nbsp;&nbsp; 2704746 |
|  |  | &nbsp;&nbsp;&nbsp; $32586181 |
| Business Services – 4.4% | Business Services – 4.4% |  |
| CoStar Group, Inc. (a) | 63595 | &nbsp;&nbsp;&nbsp; $5365510 |
| Morningstar, Inc. | 4094 | &nbsp;&nbsp;&nbsp; 949849 |
| MSCI, Inc. | 1493 | &nbsp;&nbsp;&nbsp; 847143 |
| TransUnion | 53444 | &nbsp;&nbsp;&nbsp; 4477539 |
| Verisk Analytics, Inc., "A" | 16514 | &nbsp;&nbsp;&nbsp; 4153436 |
|  |  | &nbsp;&nbsp;&nbsp; $15793477 |
| Computer Software – 13.5% | Computer Software – 13.5% |  |
| Bullish, Inc. (a)(l) | 15705 | &nbsp;&nbsp;&nbsp; $998995 |
| Cadence Design Systems, Inc. (a) | 17716 | &nbsp;&nbsp;&nbsp; 6222922 |
| Cloudflare, Inc., "A" (a) | 22286 | &nbsp;&nbsp;&nbsp; 4782353 |
| Constellation Software, Inc. | 1819 | &nbsp;&nbsp;&nbsp; 4937950 |
| Datadog, Inc., "A" (a) | 35427 | &nbsp;&nbsp;&nbsp; 5044805 |
| Figma, Inc. (a)(l) | 5896 | &nbsp;&nbsp;&nbsp; 305826 |
| Guidewire Software, Inc. (a) | 45128 | &nbsp;&nbsp;&nbsp; 10373122 |
| Manhattan Associates, Inc. (a) | 11386 | &nbsp;&nbsp;&nbsp; 2333902 |
| Netskope, Inc., "A" (a) | 22312 | &nbsp;&nbsp;&nbsp; 507152 |
| Okta, Inc. (a) | 38962 | &nbsp;&nbsp;&nbsp; 3572815 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Computer Software – continued | Computer Software – continued |  |
| Pegasystems, Inc. | 30195 | &nbsp;&nbsp;&nbsp; $1736213 |
| PTC, Inc. (a) | 2899 | &nbsp;&nbsp;&nbsp; 588555 |
| ServiceTitan, Inc., "A" (a) | 6381 | &nbsp;&nbsp;&nbsp; 643396 |
| Tyler Technologies, Inc. (a) | 8425 | &nbsp;&nbsp;&nbsp; 4407623 |
| Unity Software, Inc. (a) | 45497 | &nbsp;&nbsp;&nbsp; 1821700 |
|  |  | &nbsp;&nbsp;&nbsp; $48277329 |
| Computer Software - Systems – 1.3% | Computer Software - Systems – 1.3% |  |
| Block, Inc., "A" (a) | 28859 | &nbsp;&nbsp;&nbsp; $2085640 |
| Q2 Holdings, Inc. (a) | 24265 | &nbsp;&nbsp;&nbsp; 1756543 |
| Wix.com Ltd. (a) | 4077 | &nbsp;&nbsp;&nbsp; 724198 |
|  |  | &nbsp;&nbsp;&nbsp; $4566381 |
| Construction – 1.4% | Construction – 1.4% |  |
| Vulcan Materials Co.  | 16593 | &nbsp;&nbsp;&nbsp; $5104339 |
| Consumer Products – 0.4% | Consumer Products – 0.4% |  |
| ODDITY Tech Ltd. (a)  | 25068 | &nbsp;&nbsp;&nbsp; $1561736 |
| Consumer Services – 0.9% | Consumer Services – 0.9% |  |
| Bright Horizons Family Solutions, Inc. (a) | 15581 | &nbsp;&nbsp;&nbsp; $1691629 |
| Expedia Group, Inc. | 7145 | &nbsp;&nbsp;&nbsp; 1527244 |
|  |  | &nbsp;&nbsp;&nbsp; $3218873 |
| Electrical Equipment – 0.9% | Electrical Equipment – 0.9% |  |
| AMETEK, Inc. | 2995 | &nbsp;&nbsp;&nbsp; $563060 |
| Hubbell, Inc. | 2079 | &nbsp;&nbsp;&nbsp; 894614 |
| Vertiv Holdings Co. | 12243 | &nbsp;&nbsp;&nbsp; 1846979 |
|  |  | &nbsp;&nbsp;&nbsp; $3304653 |
| Electronics – 3.8% | Electronics – 3.8% |  |
| ASM International N.V. | 1032 | &nbsp;&nbsp;&nbsp; $620348 |
| Astera Labs, Inc. (a) | 25079 | &nbsp;&nbsp;&nbsp; 4910468 |
| Celestica, Inc. (a) | 1504 | &nbsp;&nbsp;&nbsp; 370556 |
| Monolithic Power Systems, Inc. | 8246 | &nbsp;&nbsp;&nbsp; 7591597 |
|  |  | &nbsp;&nbsp;&nbsp; $13492969 |
| Energy - Independent – 0.8% | Energy - Independent – 0.8% |  |
| Expand Energy Corp.  | 26792 | &nbsp;&nbsp;&nbsp; $2846382 |
| Energy - Renewables – 0.3% | Energy - Renewables – 0.3% |  |
| Generac Holdings, Inc. (a)  | 5911 | &nbsp;&nbsp;&nbsp; $989501 |
| Engineering - Construction – 1.6% | Engineering - Construction – 1.6% |  |
| Quanta Services, Inc.  | 13863 | &nbsp;&nbsp;&nbsp; $5745104 |
| Entertainment – 2.3% | Entertainment – 2.3% |  |
| Live Nation Entertainment, Inc. (a)  | 50628 | &nbsp;&nbsp;&nbsp; $8272615 |
| Gaming & Lodging – 5.6% | Gaming & Lodging – 5.6% |  |
| Carnival Corp. (a) | 65241 | &nbsp;&nbsp;&nbsp; $1886117 |
| DraftKings, Inc. (a) | 116984 | &nbsp;&nbsp;&nbsp; 4375202 |
| Hyatt Hotels Corp. | 26170 | &nbsp;&nbsp;&nbsp; 3714308 |
| Royal Caribbean Cruises Ltd. | 12063 | &nbsp;&nbsp;&nbsp; 3903346 |
| Sportradar Group AG (a) | 85464 | &nbsp;&nbsp;&nbsp; 2298982 |
| Viking Holdings Ltd. (a) | 62578 | &nbsp;&nbsp;&nbsp; 3889848 |
|  |  | &nbsp;&nbsp;&nbsp; $20067803 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| General Merchandise – 0.4% | General Merchandise – 0.4% |  |
| Dollar General Corp.  | 13263 | &nbsp;&nbsp;&nbsp; $1370731 |
| Insurance – 0.6% | Insurance – 0.6% |  |
| Arthur J. Gallagher & Co.  | 7156 | &nbsp;&nbsp;&nbsp; $2216499 |
| Leisure & Toys – 6.3% | Leisure & Toys – 6.3% |  |
| Roblox Corp., "A" (a) | 74932 | &nbsp;&nbsp;&nbsp; $10379580 |
| Take-Two Interactive Software, Inc. (a) | 47138 | &nbsp;&nbsp;&nbsp; 12178574 |
|  |  | &nbsp;&nbsp;&nbsp; $22558154 |
| Machinery & Tools – 1.5% | Machinery & Tools – 1.5% |  |
| Trimble, Inc. (a) | 57900 | &nbsp;&nbsp;&nbsp; $4727535 |
| Wabtec Corp. | 2389 | &nbsp;&nbsp;&nbsp; 478923 |
|  |  | &nbsp;&nbsp;&nbsp; $5206458 |
| Medical & Health Technology & Services – 1.3% | Medical & Health Technology & Services – 1.3% |  |
| Tempus AI, Inc. (a) | 5258 | &nbsp;&nbsp;&nbsp; $424373 |
| Veeva Systems, Inc. (a) | 14387 | &nbsp;&nbsp;&nbsp; 4286031 |
|  |  | &nbsp;&nbsp;&nbsp; $4710404 |
| Medical Equipment – 6.0% | Medical Equipment – 6.0% |  |
| Agilent Technologies, Inc. | 20230 | &nbsp;&nbsp;&nbsp; $2596520 |
| Caris Life Sciences, Inc. (a)(l) | 11590 | &nbsp;&nbsp;&nbsp; 350598 |
| DexCom, Inc. (a) | 51200 | &nbsp;&nbsp;&nbsp; 3445248 |
| Masimo Corp. (a) | 39658 | &nbsp;&nbsp;&nbsp; 5851538 |
| Natera, Inc. (a) | 33134 | &nbsp;&nbsp;&nbsp; 5333580 |
| STERIS PLC | 12659 | &nbsp;&nbsp;&nbsp; 3132343 |
| Waters Corp. (a) | 3148 | &nbsp;&nbsp;&nbsp; 943802 |
|  |  | &nbsp;&nbsp;&nbsp; $21653629 |
| Metals & Mining – 0.9% | Metals & Mining – 0.9% |  |
| Cameco Corp.  | 37745 | &nbsp;&nbsp;&nbsp; $3165296 |
| Natural Gas - Pipeline – 1.8% | Natural Gas - Pipeline – 1.8% |  |
| Cheniere Energy, Inc.  | 27325 | &nbsp;&nbsp;&nbsp; $6420829 |
| Network & Telecom – 0.1% | Network & Telecom – 0.1% |  |
| Ciena Corp. (a)  | 2770 | &nbsp;&nbsp;&nbsp; $403506 |
| Pharmaceuticals – 2.4% | Pharmaceuticals – 2.4% |  |
| Alnylam Pharmaceuticals, Inc. (a) | 5498 | &nbsp;&nbsp;&nbsp; $2507088 |
| Ascendis Pharma, ADR (a) | 29889 | &nbsp;&nbsp;&nbsp; 5942232 |
|  |  | &nbsp;&nbsp;&nbsp; $8449320 |
| Pollution Control – 0.8% | Pollution Control – 0.8% |  |
| GFL Environmental, Inc.  | 62854 | &nbsp;&nbsp;&nbsp; $2978023 |
| Real Estate – 1.9% | Real Estate – 1.9% |  |
| CBRE Group, Inc., "A" (a)  | 44254 | &nbsp;&nbsp;&nbsp; $6972660 |
| Restaurants – 2.7% | Restaurants – 2.7% |  |
| Aramark | 58306 | &nbsp;&nbsp;&nbsp; $2238950 |
| Performance Food Group Co. (a) | 25310 | &nbsp;&nbsp;&nbsp; 2633252 |
| U.S. Foods Holding Corp. (a) | 13235 | &nbsp;&nbsp;&nbsp; 1014066 |
| Wingstop, Inc. | 14319 | &nbsp;&nbsp;&nbsp; 3603806 |
|  |  | &nbsp;&nbsp;&nbsp; $9490074 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Specialty Stores – 6.3% | Specialty Stores – 6.3% |  |
| BJ's Wholesale Club Holdings, Inc. (a) | 26434 | &nbsp;&nbsp;&nbsp; $2464971 |
| Burlington Stores, Inc. (a) | 15001 | &nbsp;&nbsp;&nbsp; 3817755 |
| Coupang, Inc. (a) | 185527 | &nbsp;&nbsp;&nbsp; 5973969 |
| Floor & Decor Holdings, Inc., "A" (a) | 12479 | &nbsp;&nbsp;&nbsp; 919702 |
| Grab Holdings Ltd., "A" (a) | 68455 | &nbsp;&nbsp;&nbsp; 412099 |
| O'Reilly Automotive, Inc. (a) | 49082 | &nbsp;&nbsp;&nbsp; 5291530 |
| Tapestry, Inc. | 26108 | &nbsp;&nbsp;&nbsp; 2955948 |
| Tractor Supply Co. | 15794 | &nbsp;&nbsp;&nbsp; 898205 |
|  |  | &nbsp;&nbsp;&nbsp; $22734179 |
| Utilities - Electric Power – 3.0% | Utilities - Electric Power – 3.0% |  |
| Vistra Corp.  | 54149 | &nbsp;&nbsp;&nbsp; $10608872 |
| **Total Common Stocks**  |  | &nbsp;&nbsp; **$354107999** |

---

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

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Strike** <br>**Price**<br>| &nbsp;&nbsp; **First** <br>**Exercise**<br>|  |  |
| Warrants – 0.0% |  |  |  |  |
| Computer Software – 0.0% | Computer Software – 0.0% | Computer Software – 0.0% | Computer Software – 0.0% | Computer 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 |

---

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

---

| | | |
|:---|:---|:---|
| Mutual Funds (h) – 1.1%  | Mutual Funds (h) – 1.1%  | Mutual Funds (h) – 1.1%  |
| Money Market Funds – 1.1% | Money Market Funds – 1.1% |  |
| MFS Institutional Money Market Portfolio, 4.19% (v)  | 3793988 | &nbsp;&nbsp;&nbsp; $3794368 |
| Collateral for Securities Loaned – 0.3%  | Collateral for Securities Loaned – 0.3%  | Collateral for Securities Loaned – 0.3%  |
| JPMorgan U.S. Government Money Market Fund - Class IM Shares, 4.09% (j)  | 1238450 | &nbsp;&nbsp;&nbsp; $1238450 |
| Other Assets, Less Liabilities – (0.2)% |  | &nbsp;&nbsp;&nbsp; (548097)<br>|
| **Net Assets – 100.0%** | **Net Assets – 100.0%** | &nbsp;&nbsp; **$358592720** |

---

&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 $3,794,368 and $355,346,449, respectively.

&nbsp;&nbsp;&nbsp;&nbsp;(j) The rate quoted is the annualized seven-day yield of the fund at period end.

&nbsp;&nbsp;&nbsp;&nbsp;(l) A portion of this security is on loan.

&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**

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. 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 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; $312113783 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $312113783 |
| &nbsp;&nbsp;&nbsp; Canada | &nbsp;&nbsp;&nbsp; 11451825 | &nbsp;&nbsp;&nbsp; 0 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 11451825 |
| &nbsp;&nbsp;&nbsp; Sweden | &nbsp;&nbsp;&nbsp; 10155900 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 10155900 |
| &nbsp;&nbsp;&nbsp; South Korea | &nbsp;&nbsp;&nbsp; 5973969 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 5973969 |
| &nbsp;&nbsp;&nbsp; Denmark | &nbsp;&nbsp;&nbsp; 5942232 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 5942232 |
| &nbsp;&nbsp;&nbsp; Switzerland | &nbsp;&nbsp;&nbsp; 2298982 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 2298982 |
| &nbsp;&nbsp;&nbsp; Israel | &nbsp;&nbsp;&nbsp; 2285934 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 2285934 |
| &nbsp;&nbsp;&nbsp; United Kingdom | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1194933 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1194933 |
| &nbsp;&nbsp;&nbsp; Cayman Islands | &nbsp;&nbsp;&nbsp; 998995 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 998995 |
| &nbsp;&nbsp;&nbsp; Other Countries | &nbsp;&nbsp;&nbsp; 1071098 | &nbsp;&nbsp;&nbsp; 620348 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1691446 |
| Investment Companies | &nbsp;&nbsp;&nbsp; 5032818 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 5032818 |
| Total | &nbsp;&nbsp;&nbsp; $357325536 | &nbsp;&nbsp;&nbsp; $1815281 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $359140817 |

---

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; $2335732 | &nbsp;&nbsp; $57742729 | &nbsp;&nbsp; $56283965 | &nbsp;&nbsp; $(155)<br>| &nbsp;&nbsp; $27 | &nbsp;&nbsp; $3794368<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; $141128 | &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:** 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:** $359264904.45

**Total Liabilities:** $1406625.65

**Net Assets:** $357858278.80

**Cash Not Reported:** $21.19

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000007326 | -0.20%               | 0.33%                | 0.48%                |
| Class ID C000007327 | -0.23%               | 0.42%                | 0.43%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $14445812.38             | $-15107938.49                              |
| Month 2  | $5446131.80              | $-3942389.81                               |
| Month 3  | $6102867.76              | $-4395190.26                               |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Hyatt Hotels Corp                         | Hyatt Hotels Corp                         | CUSIP: 448579102<br>LEI: T27JQIMTYSH41TCD5186 | Long             | EC               | CORP              | US        |     26170 | NS      | $3714308.10   | 1.04%             |  |  |  | No            |                  1 | On Loan: No      |
| Astera Labs Inc                           | Astera Labs Inc                           | CUSIP: 04626A103<br>LEI: 529900LJL8TUEGF7HG20 | Long             | EC               | CORP              | US        |     25079 | NS      | $4910468.20   | 1.37%             |  |  |  | No            |                  1 | On Loan: No      |
| Dollar General Corp                       | Dollar General Corp                       | CUSIP: 256677105<br>LEI: OPX52SQVOZI8IVSWYU66 | Long             | EC               | CORP              | US        |     13263 | NS      | $1370731.05   | 0.38%             |  |  |  | No            |                  1 | On Loan: No      |
| AMETEK Inc                                | AMETEK Inc                                | CUSIP: 031100100<br>LEI: 549300WZDEF9KKE40E98 | Long             | EC               | CORP              | US        |      2995 | NS      | $563060.00    | 0.16%             |  |  |  | No            |                  1 | On Loan: No      |
| Alnylam Pharmaceuticals Inc               | Alnylam Pharmaceuticals Inc               | CUSIP: 02043Q107<br>LEI: 529900S3ZI14OWRJII50 | Long             | EC               | CORP              | US        |      5498 | NS      | $2507088.00   | 0.70%             |  |  |  | No            |                  1 | On Loan: No      |
| Vistra Corp                               | Vistra Corp                               | CUSIP: 92840M102<br>LEI: 549300KP43CPCUJOOG15 | Long             | EC               | CORP              | US        |     54149 | NS      | $10608872.08  | 2.96%             |  |  |  | No            |                  1 | On Loan: No      |
| Mirion Technologies Inc                   | Mirion Technologies Inc                   | CUSIP: 60471A101<br>LEI: 549300BNTOWVWFNVTJ65 | Long             | EC               | CORP              | US        |     51762 | NS      | $1203984.12   | 0.34%             |  |  |  | No            |                  1 | On Loan: No      |
| MSCI Inc                                  | MSCI Inc                                  | CUSIP: 55354G100<br>LEI: 549300HTIN2PD78UB763 | Long             | EC               | CORP              | US        |      1493 | NS      | $847143.13    | 0.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Okta Inc                                  | Okta Inc                                  | CUSIP: 679295105<br>LEI: 549300N8J06I8MRHU620 | Long             | EC               | CORP              | US        |     38962 | NS      | $3572815.40   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Exact Sciences Corp                       | Exact Sciences Corp                       | CUSIP: 30063P105<br>LEI: 549300VM3X1FYD4N9Z14 | Long             | EC               | CORP              | US        |     48507 | NS      | $2653817.97   | 0.74%             |  |  |  | No            |                  1 | On Loan: No      |
| Tractor Supply Co                         | Tractor Supply Co                         | CUSIP: 892356106<br>LEI: 549300OJ9VZHZRO6I137 | Long             | EC               | CORP              | US        |     15794 | NS      | $898204.78    | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| Expedia Group Inc                         | Expedia Group Inc                         | CUSIP: 30212P303<br>LEI: CI7MUJI4USF3V0NJ1H64 | Long             | EC               | CORP              | US        |      7145 | NS      | $1527243.75   | 0.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Cloudflare Inc                            | Cloudflare Inc                            | CUSIP: 18915M107<br>LEI: 5493007DY18BGNLDWU14 | Long             | EC               | CORP              | US        |     22286 | NS      | $4782352.74   | 1.34%             |  |  |  | No            |                  1 | On Loan: No      |
| Constellation Software Inc/Canada         | Constellation Software Inc/Canada         | CUSIP: 21037X100<br>LEI: 549300B6PYHMCTDWQV29 | Long             | EC               | CORP              | CA        |      1819 | NS      | $4937950.43   | 1.38%             |  |  |  | No            |                  1 | On Loan: No      |
| Agilent Technologies Inc                  | Agilent Technologies Inc                  | CUSIP: 00846U101<br>LEI: QUIX8Y7A2WP0XRMW7G29 | Long             | EC               | CORP              | US        |     20230 | NS      | $2596520.50   | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| Aramark                                   | Aramark                                   | CUSIP: 03852U106<br>LEI: 549300MR6PG2DWZUIL39 | Long             | EC               | CORP              | US        |     58306 | NS      | $2238950.40   | 0.63%             |  |  |  | No            |                  1 | On Loan: No      |
| Burlington Stores Inc                     | Burlington Stores Inc                     | CUSIP: 122017106<br>LEI: 5299003Z37DVGKKC1W09 | Long             | EC               | CORP              | US        |     15001 | NS      | $3817754.50   | 1.07%             |  |  |  | No            |                  1 | On Loan: No      |
| Spotify Technology SA                     | Spotify Technology SA                     | CUSIP: 000000000<br>LEI: 549300B4X0JHWV0DTD60 | Long             | EC               | CORP              | LU        |     14550 | NS      | $10155900.00  | 2.84%             |  |  |  | No            |                  1 | On Loan: No      |
| US Foods Holding Corp                     | US Foods Holding Corp                     | CUSIP: 912008109<br>LEI: 549300UGOZSO64CFPR97 | Long             | EC               | CORP              | US        |     13235 | NS      | $1014065.70   | 0.28%             |  |  |  | No            |                  1 | On Loan: No      |
| Robinhood Markets Inc                     | Robinhood Markets Inc                     | CUSIP: 770700102<br>LEI: 213800FS5AO3YWIE6F63 | Long             | EC               | CORP              | US        |     51505 | NS      | $7374485.90   | 2.06%             |  |  |  | No            |                  1 | On Loan: No      |
| Cheniere Energy Inc                       | Cheniere Energy Inc                       | CUSIP: 16411R208<br>LEI: MIHC87W9WTYSYZWV1J40 | Long             | EC               | CORP              | US        |     27325 | NS      | $6420828.50   | 1.79%             |  |  |  | No            |                  1 | On Loan: No      |
| Sportradar Group AG                       | Sportradar Group AG                       | CUSIP: 000000000<br>LEI: 549300H1P33YOAT7Z533 | Long             | EC               | CORP              | CH        |     85464 | NS      | $2298981.60   | 0.64%             |  |  |  | No            |                  1 | On Loan: No      |
| Carvana Co                                | Carvana Co                                | CUSIP: 146869102<br>LEI: 5493003WEAK2PJ5WS063 | Long             | EC               | CORP              | US        |     10537 | NS      | $3974977.88   | 1.11%             |  |  |  | No            |                  1 | On Loan: No      |
| ASM International NV                      | ASM International NV                      | CUSIP: 000000000<br>LEI: 7245001I22ND6ZFHX623 | Long             | EC               | CORP              | NL        |      1032 | NS      | $620347.57    | 0.17%             |  |  |  | No            |                  2 | On Loan: No      |
| Viking Holdings Ltd                       | Viking Holdings Ltd                       | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | BM        |     62578 | NS      | $3889848.48   | 1.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Vulcan Materials Co                       | Vulcan Materials Co                       | CUSIP: 929160109<br>LEI: 549300Q8LSNHAVWBNI21 | Long             | EC               | CORP              | US        |     16593 | NS      | $5104338.66   | 1.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Manhattan Associates Inc                  | Manhattan Associates Inc                  | CUSIP: 562750109<br>LEI: 529900Q1GJP7KD52SW51 | Long             | EC               | CORP              | US        |     11386 | NS      | $2333902.28   | 0.65%             |  |  |  | No            |                  1 | On Loan: No      |
| Carlyle Group Inc/The                     | Carlyle Group Inc/The                     | CUSIP: 14316J108<br>LEI: 529900NGGVF94UK6PG95 | Long             | EC               | CORP              | US        |     83181 | NS      | $5215448.70   | 1.46%             |  |  |  | No            |                  1 | On Loan: No      |
| Ascendis Pharma A/S                       | Ascendis Pharma A/S                       | CUSIP: 04351P101<br>LEI: 549300B66JN3W3J8GH73 | Long             | EC               | CORP              | DK        |     29889 | NS      | $5942232.09   | 1.66%             |  |  |  | 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      |
| CBRE Group Inc                            | CBRE Group Inc                            | CUSIP: 12504L109<br>LEI: 52990016II9MJ2OSWA10 | Long             | EC               | CORP              | US        |     44254 | NS      | $6972660.24   | 1.95%             |  |  |  | No            |                  1 | On Loan: No      |
| Block Inc                                 | Block Inc                                 | CUSIP: 852234103<br>LEI: 549300OHIIUWSTIZME52 | Long             | EC               | CORP              | US        |     28859 | NS      | $2085639.93   | 0.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Celestica Inc                             | Celestica Inc                             | CUSIP: 15101Q207<br>LEI: 549300J3CG5T6RZWLN53 | Long             | EC               | CORP              | CA        |      1504 | NS      | $370555.52    | 0.10%             |  |  |  | No            |                  1 | On Loan: No      |
| TKO Group Holdings Inc                    | TKO Group Holdings Inc                    | CUSIP: 87256C101<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     33830 | NS      | $6832306.80   | 1.91%             |  |  |  | No            |                  1 | On Loan: No      |
| JP Morgan US Government Money Market Fund | JP Morgan US Government Money Market Fund | CUSIP: 4812C2270<br>LEI: 549300NQ5E5B7ZV4T516 | Long             | STIV             | RF                | US        |   1238450 | NS      | $1238450.00   | 0.35%             |  |  |  | No            |                  1 | On Loan: No      |
| Generac Holdings Inc                      | Generac Holdings Inc                      | CUSIP: 368736104<br>LEI: 529900S2H2AHJHSFFI84 | Long             | EC               | CORP              | US        |      5911 | NS      | $989501.40    | 0.28%             |  |  |  | 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        |     26434 | NS      | $2464970.50   | 0.69%             |  |  |  | No            |                  1 | On Loan: No      |
| Pegasystems Inc                           | Pegasystems Inc                           | CUSIP: 705573103<br>LEI: 549300FMCOKPL06FYN26 | Long             | EC               | CORP              | US        |     30195 | NS      | $1736212.50   | 0.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Royal Caribbean Cruises Ltd               | Royal Caribbean Cruises Ltd               | CUSIP: 000000000<br>LEI: K2NEH8QNVW44JIWK7Z55 | Long             | EC               | CORP              | LR        |     12063 | NS      | $3903345.54   | 1.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Tyler Technologies Inc                    | Tyler Technologies Inc                    | CUSIP: 902252105<br>LEI: 25490040SMU4Z8LBCW70 | Long             | EC               | CORP              | US        |      8425 | NS      | $4407623.00   | 1.23%             |  |  |  | No            |                  1 | On Loan: No      |
| Vertiv Holdings Co                        | Vertiv Holdings Co                        | CUSIP: 92537N108<br>LEI: 549300KTTIRAOGXCRV69 | Long             | EC               | CORP              | US        |     12243 | NS      | $1846978.98   | 0.52%             |  |  |  | No            |                  1 | On Loan: No      |
| Veeva Systems Inc                         | Veeva Systems Inc                         | CUSIP: 922475108<br>LEI: 549300YZEXPDB92M2F02 | Long             | EC               | CORP              | US        |     14387 | NS      | $4286031.17   | 1.20%             |  |  |  | No            |                  1 | On Loan: No      |
| Bullish                                   | Bullish                                   | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |     15705 | NS      | $998995.05    | 0.28%             |  |  |  | No            |                  1 | On Loan: —       |
| Axon Enterprise Inc                       | Axon Enterprise Inc                       | CUSIP: 05464C101<br>LEI: 549300QP2IEEGFE16681 | Long             | EC               | CORP              | US        |     11273 | NS      | $8089955.72   | 2.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Coupang Inc                               | Coupang Inc                               | CUSIP: 22266T109<br>LEI: 549300XR4L1D80AK4W76 | Long             | EC               | CORP              | US        |    185527 | NS      | $5973969.40   | 1.67%             |  |  |  | No            |                  1 | On Loan: No      |
| Trimble Inc                               | Trimble Inc                               | CUSIP: 896239100<br>LEI: 549300E2MI7NSZFQWS19 | Long             | EC               | CORP              | US        |     57900 | NS      | $4727535.00   | 1.32%             |  |  |  | No            |                  1 | On Loan: No      |
| Wingstop Inc                              | Wingstop Inc                              | CUSIP: 974155103<br>LEI: 549300SSH3F8HPIM3Q47 | Long             | EC               | CORP              | US        |     14319 | NS      | $3603805.92   | 1.01%             |  |  |  | No            |                  1 | On Loan: No      |
| Take-Two Interactive Software Inc         | Take-Two Interactive Software Inc         | CUSIP: 874054109<br>LEI: BOMSTHHJK882EWYX3334 | Long             | EC               | CORP              | US        |     47138 | NS      | $12178573.68  | 3.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Hubbell Inc                               | Hubbell Inc                               | CUSIP: 443510607<br>LEI: 54930088VDQ6840Y6597 | Long             | EC               | CORP              | US        |      2079 | NS      | $894614.49    | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| O'Reilly Automotive Inc                   | O'Reilly Automotive Inc                   | CUSIP: 67103H107<br>LEI: 549300K2RLMQL149Q332 | Long             | EC               | CORP              | US        |     49082 | NS      | $5291530.42   | 1.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Quanta Services Inc                       | Quanta Services Inc                       | CUSIP: 74762E102<br>LEI: SHVRXXEACT60MMH07S24 | Long             | EC               | CORP              | US        |     13863 | NS      | $5745104.46   | 1.61%             |  |  |  | No            |                  1 | On Loan: No      |
| ServiceTitan Inc                          | ServiceTitan Inc                          | CUSIP: 81764X103<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      6381 | NS      | $643396.23    | 0.18%             |  |  |  | No            |                  1 | On Loan: No      |
| Ares Management Corp                      | Ares Management Corp                      | CUSIP: 03990B101<br>LEI: 529900JUV61FH7B8VW38 | Long             | EC               | CORP              | US        |     33229 | NS      | $5312984.81   | 1.48%             |  |  |  | No            |                  1 | On Loan: No      |
| TransUnion                                | TransUnion                                | CUSIP: 89400J107<br>LEI: 549300ZS772LUNUMRB03 | Long             | EC               | CORP              | US        |     53444 | NS      | $4477538.32   | 1.25%             |  |  |  | No            |                  1 | On Loan: No      |
| Guidewire Software Inc                    | Guidewire Software Inc                    | CUSIP: 40171V100<br>LEI: 549300WXSG0J8IXZCK32 | Long             | EC               | CORP              | US        |     45128 | NS      | $10373122.08  | 2.90%             |  |  |  | No            |                  1 | On Loan: No      |
| Tempus AI Inc                             | Tempus AI Inc                             | CUSIP: 88023B103<br>LEI: 2549009LA0KWRAGQBX50 | Long             | EC               | CORP              | US        |      5258 | NS      | $424373.18    | 0.12%             |  |  |  | No            |                  1 | On Loan: No      |
| CoStar Group Inc                          | CoStar Group Inc                          | CUSIP: 22160N109<br>LEI: 984500Q1D53D08E2E698 | Long             | EC               | CORP              | US        |     63595 | NS      | $5365510.15   | 1.50%             |  |  |  | No            |                  1 | On Loan: No      |
| BWX Technologies Inc                      | BWX Technologies Inc                      | CUSIP: 05605H100<br>LEI: 549300NP85N265KWMS58 | Long             | EC               | CORP              | US        |     18222 | NS      | $3359590.14   | 0.94%             |  |  |  | No            |                  1 | On Loan: No      |
| Cadence Design Systems Inc                | Cadence Design Systems Inc                | CUSIP: 127387108<br>LEI: GCT7RXJOGLXPV0NXZY22 | Long             | EC               | CORP              | US        |     17716 | NS      | $6222922.16   | 1.74%             |  |  |  | No            |                  1 | On Loan: No      |
| Caris Life Sciences Inc                   | Caris Life Sciences Inc                   | CUSIP: 142152107<br>LEI: 549300LX5LO78M5VPY43 | Long             | EC               | CORP              | US        |     11590 | NS      | $350597.50    | 0.10%             |  |  |  | No            |                  1 | On Loan: —       |
| Amer Sports Inc                           | Amer Sports Inc                           | CUSIP: 000000000<br>LEI: 391200YCSWTRD1J21867 | Long             | EC               | CORP              | KY        |     18964 | NS      | $658999.00    | 0.18%             |  |  |  | No            |                  1 | On Loan: No      |
| Cameco Corp                               | Cameco Corp                               | CUSIP: 13321L108<br>LEI: N4BHALMXL3GMZKCUON55 | Long             | EC               | CORP              | CA        |     37745 | NS      | $3165295.70   | 0.88%             |  |  |  | No            |                  1 | On Loan: No      |
| Bright Horizons Family Solutions Inc      | Bright Horizons Family Solutions Inc      | CUSIP: 109194100<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     15581 | NS      | $1691629.17   | 0.47%             |  |  |  | No            |                  1 | On Loan: No      |
| Oddity Tech Ltd                           | Oddity Tech Ltd                           | CUSIP: 000000000<br>LEI: 254900QH12XZS53G0V57 | Long             | EC               | CORP              | IL        |     25068 | NS      | $1561736.40   | 0.44%             |  |  |  | No            |                  1 | On Loan: No      |
| Netskope Inc                              | Netskope Inc                              | CUSIP: 64119N608<br>LEI: 254900CS525VJG6KO570 | Long             | EC               | CORP              | US        |     22312 | NS      | $507151.76    | 0.14%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Institutional Money Market Portfolio  | MFS Institutional Money Market Portfolio  | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | EC               | RF                | US        |   3781516 | NS      | $3781894.10   | 1.06%             |  |  |  | No            |                  1 | On Loan: No      |
| GFL Environmental Inc                     | GFL Environmental Inc                     | CUSIP: 36168Q104<br>LEI: 894500E7NLBY9VZRT696 | Long             | EC               | CORP              | CA        |     62854 | NS      | $2978022.52   | 0.83%             |  |  |  | No            |                  1 | On Loan: No      |
| Ciena Corp                                | Ciena Corp                                | CUSIP: 171779309<br>LEI: W0CZ7N0GH8UIGXDM1H41 | Long             | EC               | CORP              | US        |      2770 | NS      | $403505.90    | 0.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Curtiss-Wright Corp                       | Curtiss-Wright Corp                       | CUSIP: 231561101<br>LEI: TEL51ETZWP7D0ZM4X325 | Long             | EC               | CORP              | US        |      5771 | NS      | $3133306.74   | 0.88%             |  |  |  | No            |                  1 | On Loan: No      |
| Melrose Industries PLC                    | Melrose Industries PLC                    | CUSIP: 000000000<br>LEI: 213800RGNXXZY2M7TR85 | Long             | EC               | CORP              | GB        |    145029 | NS      | $1194933.63   | 0.33%             |  |  |  | No            |                  2 | On Loan: No      |
| DraftKings Inc                            | DraftKings Inc                            | CUSIP: 26142V105<br>LEI: 2549006G33IUL6IVOD83 | Long             | EC               | CORP              | US        |    116984 | NS      | $4375201.60   | 1.22%             |  |  |  | No            |                  1 | On Loan: No      |
| Dexcom Inc                                | Dexcom Inc                                | CUSIP: 252131107<br>LEI: 549300YSK3QDSFR5EU59 | Long             | EC               | CORP              | US        |     51200 | NS      | $3445248.00   | 0.96%             |  |  |  | No            |                  1 | On Loan: No      |
| Figma Inc                                 | Figma Inc                                 | CUSIP: 316841105<br>LEI: 254900273Q0J4Z65HU28 | Long             | EC               | CORP              | US        |      5896 | NS      | $305825.52    | 0.09%             |  |  |  | No            |                  1 | On Loan: —       |
| ACV Auctions Inc                          | ACV Auctions Inc                          | CUSIP: 00091G104<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     73166 | NS      | $725075.06    | 0.20%             |  |  |  | No            |                  1 | On Loan: No      |
| LPL Financial Holdings Inc                | LPL Financial Holdings Inc                | CUSIP: 50212V100<br>LEI: 549300XROQ4Y8G2L7682 | Long             | EC               | CORP              | US        |     20489 | NS      | $6816485.41   | 1.90%             |  |  |  | No            |                  1 | On Loan: No      |
| Live Nation Entertainment Inc             | Live Nation Entertainment Inc             | CUSIP: 538034109<br>LEI: 5493007B9BM9ZXJINO78 | Long             | EC               | CORP              | US        |     50628 | NS      | $8272615.20   | 2.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Datadog Inc                               | Datadog Inc                               | CUSIP: 23804L103<br>LEI: 549300F6JNO0KRPO1K63 | Long             | EC               | CORP              | US        |     35427 | NS      | $5044804.80   | 1.41%             |  |  |  | No            |                  1 | On Loan: No      |
| PTC Inc                                   | PTC Inc                                   | CUSIP: 69370C100<br>LEI: 54930050SSMU8SKDJ030 | Long             | EC               | CORP              | US        |      2899 | NS      | $588554.98    | 0.16%             |  |  |  | No            |                  1 | On Loan: No      |
| Carnival Corp                             | Carnival Corp                             | CUSIP: 143658300<br>LEI: F1OF2ZSX47CR0BCWA982 | Long             | EC               | CORP              | PA        |     65241 | NS      | $1886117.31   | 0.53%             |  |  |  | No            |                  1 | On Loan: No      |
| Monolithic Power Systems Inc              | Monolithic Power Systems Inc              | CUSIP: 609839105<br>LEI: 529900TB7O85LSZ1XU31 | Long             | EC               | CORP              | US        |      8246 | NS      | $7591597.44   | 2.12%             |  |  |  | No            |                  1 | On Loan: No      |
| Natera Inc                                | Natera Inc                                | CUSIP: 632307104<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     33134 | NS      | $5333579.98   | 1.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Masimo Corp                               | Masimo Corp                               | CUSIP: 574795100<br>LEI: 549300Q4A8JK0PIYCU29 | Long             | EC               | CORP              | US        |     39658 | NS      | $5851537.90   | 1.64%             |  |  |  | No            |                  1 | On Loan: No      |
| Copart Inc                                | Copart Inc                                | CUSIP: 217204106<br>LEI: 549300KVYX3JWMYEHU61 | Long             | EC               | CORP              | US        |     14298 | NS      | $642981.06    | 0.18%             |  |  |  | No            |                  1 | On Loan: No      |
| Unity Software Inc                        | Unity Software Inc                        | CUSIP: 91332U101<br>LEI: 549300D1ESJMGNQNG432 | Long             | EC               | CORP              | US        |     45497 | NS      | $1821699.88   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |
| Verisk Analytics Inc                      | Verisk Analytics Inc                      | CUSIP: 92345Y106<br>LEI: 549300I1YSWNIRKBWP67 | Long             | EC               | CORP              | US        |     16514 | NS      | $4153436.14   | 1.16%             |  |  |  | No            |                  1 | On Loan: No      |
| Tapestry Inc                              | Tapestry Inc                              | CUSIP: 876030107<br>LEI: 549300LJNVY5SW3VTN33 | Long             | EC               | CORP              | US        |     26108 | NS      | $2955947.76   | 0.83%             |  |  |  | No            |                  1 | On Loan: No      |
| ROBLOX Corp                               | ROBLOX Corp                               | CUSIP: 771049103<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     74932 | NS      | $10379580.64  | 2.90%             |  |  |  | No            |                  1 | On Loan: No      |
| Howmet Aerospace Inc                      | Howmet Aerospace Inc                      | CUSIP: 443201108<br>LEI: 549300HO5WFZUT5N2T22 | Long             | EC               | CORP              | US        |     75671 | NS      | $14848920.33  | 4.15%             |  |  |  | No            |                  1 | On Loan: No      |
| Nasdaq Inc                                | Nasdaq Inc                                | CUSIP: 631103108<br>LEI: 549300L8X1Q78ERXFD06 | Long             | EC               | CORP              | US        |     58361 | NS      | $5162030.45   | 1.44%             |  |  |  | No            |                  1 | On Loan: No      |
| Hexcel Corp                               | Hexcel Corp                               | CUSIP: 428291108<br>LEI: S6Q7LW43WUBUHXY2QP69 | Long             | EC               | CORP              | US        |     23584 | NS      | $1478716.80   | 0.41%             |  |  |  | No            |                  1 | On Loan: No      |
| TPG Inc                                   | TPG Inc                                   | CUSIP: 872657101<br>LEI: 549300NLO4R8MX77XJ02 | Long             | EC               | CORP              | US        |     47080 | NS      | $2704746.00   | 0.76%             |  |  |  | No            |                  1 | On Loan: No      |
| Performance Food Group Co                 | Performance Food Group Co                 | CUSIP: 71377A103<br>LEI: 549300EUK8GR9IT1YK57 | Long             | EC               | CORP              | US        |     25310 | NS      | $2633252.40   | 0.74%             |  |  |  | No            |                  1 | On Loan: No      |
| VF Corp                                   | VF Corp                                   | CUSIP: 918204108<br>LEI: CWAJJ9DJ5Z7P057HV541 | Long             | EC               | CORP              | US        |     26927 | NS      | $388556.61    | 0.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Expand Energy Corp                        | Expand Energy Corp                        | CUSIP: 165167735<br>LEI: X2MT1W32SPAZ9WSKLE78 | Long             | EC               | CORP              | US        |     26792 | NS      | $2846382.08   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| STERIS PLC                                | STERIS PLC                                | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | IE        |     12659 | NS      | $3132342.96   | 0.88%             |  |  |  | No            |                  1 | On Loan: No      |
| Morningstar Inc                           | Morningstar Inc                           | CUSIP: 617700109<br>LEI: 529900YGNQPOVAXQ7F29 | Long             | EC               | CORP              | US        |      4094 | NS      | $949848.94    | 0.27%             |  |  |  | No            |                  1 | On Loan: No      |
| Waters Corp                               | Waters Corp                               | CUSIP: 941848103<br>LEI: 5T547R1474YC9HOD8Q74 | Long             | EC               | CORP              | US        |      3148 | NS      | $943801.88    | 0.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Arthur J Gallagher & Co                   | Arthur J Gallagher & Co                   | CUSIP: 363576109<br>LEI: 54930049QLLMPART6V29 | Long             | EC               | CORP              | US        |      7156 | NS      | $2216499.44   | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| Wix.com Ltd                               | Wix.com Ltd                               | CUSIP: 000000000<br>LEI: 5493008P6N29Q1AG9464 | Long             | EC               | CORP              | IL        |      4077 | NS      | $724197.51    | 0.20%             |  |  |  | No            |                  1 | On Loan: No      |
| Westinghouse Air Brake Technologies Corp  | Westinghouse Air Brake Technologies Corp  | CUSIP: 929740108<br>LEI: 06BTX5UWZD0GQ5N5Y745 | Long             | EC               | CORP              | US        |      2389 | NS      | $478922.83    | 0.13%             |  |  |  | No            |                  1 | On Loan: No      |
| Q2 Holdings Inc                           | Q2 Holdings Inc                           | CUSIP: 74736L109<br>LEI: 549300M9RKR9DZXWS696 | Long             | EC               | CORP              | US        |     24265 | NS      | $1756543.35   | 0.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Grab Holdings Ltd                         | Grab Holdings Ltd                         | CUSIP: 000000000<br>LEI: 549300N4VQX83VPJF439 | Long             | EC               | CORP              | KY        |     68455 | NS      | $412099.10    | 0.12%             |  |  |  | No            |                  1 | On Loan: No      |
| Floor & Decor Holdings Inc                | Floor & Decor Holdings Inc                | CUSIP: 339750101<br>LEI: 549300M5FR3N688XGQ36 | Long             | EC               | CORP              | US        |     12479 | NS      | $919702.30    | 0.26%             |  |  |  | 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