# EDGAR Filing Document

**Accession Number:** 0000943863
**File Stem:** 0001133228-25-010528
**Filing Date:** 2025-10
**Character Count:** 3604
**Document Hash:** 610753e1608b2510f5134765dd1738a6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-25-010528.hdr.sgml**: 20251006

**ACCESSION NUMBER**: 0001133228-25-010528

**CONFORMED SUBMISSION TYPE**: 497VPI

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251006

**DATE AS OF CHANGE**: 20251006

**EFFECTIVENESS DATE**: 20251006

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** C M LIFE VARIABLE LIFE SEPARATE ACCOUNT I
- **CENTRAL INDEX KEY:** 0000943863

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** CT
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497VPI
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-259818
- **FILM NUMBER:** 251377081

**BUSINESS ADDRESS:**
- **STREET 1:** 100 BRIGHT MEADOW BOULEVARD
- **CITY:** ENFIELD
- **STATE:** CT
- **ZIP:** 06082
- **BUSINESS PHONE:** (413)788-8411

**MAIL ADDRESS:**
- **STREET 1:** 1295 STATE STREET
- **CITY:** SPRINGFIELD
- **STATE:** MA
- **ZIP:** 01111-0001

## Series and Classes Contracts Data

### C M LIFE VARIABLE LIFE SEPARATE ACCOUNT I (Series ID: S000010877)

| Class ID   | Class Name                     | Ticker Symbol   |
|:---|:---|:---|
| C000232693 | C.M. Life Electrum Select (SM) |  |

**Supplement dated October 6, 2025**

**to the Prospectus and Updating Summary Prospectus,<br> each dated April 28, 2025 (each a "Prospectus"), as supplemented, for:**

**MassMutual Electrum<sup>SM</sup>** *Issued by Massachusetts Mutual Life Insurance Company*

**and to the Prospectus, Initial Summary Prospectus, and Updating Summary Prospectus,<br> each dated April 28, 2025 (each a "Prospectus"), as supplemented, for:**

**C.M. Life Electrum Select<sup>SM</sup>**

*Issued by C.M. Life Insurance Company*

 

**THIS SUPPLEMENT MUST BE READ IN CONJUNCTION WITH YOUR PROSPECTUS.**<br> **PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE.**<br>

 

*Effective September 25, 2025, this supplement amends certain information in the above-referenced prospectuses ("Prospectuses"). The information in **Appendix A** of the Prospectuses for the **MFS<sup>®</sup> Blended Research<sup>®</sup> Core Equity Portfolio** is deleted and replaced with the following:*

 

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| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Fund Type** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Fund and Adviser/Sub-Adviser** | **Average Annual Total Returns**<br> **(as of 12/31/2024)** | **Average Annual Total Returns**<br> **(as of 12/31/2024)** | **Average Annual Total Returns**<br> **(as of 12/31/2024)** |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Fund Type** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Fund and Adviser/Sub-Adviser** | **1 Year** | **5 Year** | **10 Year** |
| Large Cap Blend | MFS<sup>®</sup> Blended Research<sup>®</sup> Core Equity (Initial Class)<br> ***Adviser:*** Massachusetts Financial Services Company<br> ***Sub-Adviser:*** N/A 0.29%<sup>(\*)</sup> | 25.50% | 15.15% | 12.32% |

---

 

<sup>(\*)</sup> This fund is subject to an expense reimbursement or fee waiver arrangement. As a result, this fund's annual expenses reflect temporary expense reductions. See the fund prospectus for additional information.

If you have questions about this supplement, or other product questions, you may contact your registered representative, visit us online at www.MassMutual.com/contact-us, or call our Service Center at (800) 665-2654, 8 a.m.–5 p.m. Eastern Time.

**For more information about the fund, read the fund prospectus. Prospectuses are available on our website at www.MassMutual.com.**

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