Prospectus by Investment Company (Form 497)

Supplement dated October 9, 2026, to the following Minnesota Life Insurance Company Prospectus dated May 1, 2026 for your Variable Universal Life Policy:

This prospectus supplement updates and supplements the information contained in the product prospectus dated May 1, 2026, and any supplements thereto. Defined terms used within this supplement that are not otherwise defined herein shall have the same meanings as those given in the May 1, 2026 Prospectus. This supplement contains information about changes to your Variable Universal Life Defender Policy issued by Minnesota Life Insurance Company. Your Policy may or may not be affected by all of the changes outlined in this supplement.

1. The sub-section of the Prospectus entitled "Purpose" within the "Overview" section of the Prospectus is deleted and replaced with the following:

This Prospectus describes a flexible premium variable universal life insurance policy called Defender VUL. This prospectus describes three versions of the Defender VUL Insurance Policy, "Defender 2001 CSO", "Defender 2017 CSO (Version 1), and "Defender 2017 CSO (Version 2)." To determine which version of the product you have, please refer to your Policy pages.

You should only purchase this Policy if you need death benefit protection. The Policy may also be appropriate for persons seeking the potential for the accumulation of cash values over a long-term investment horizon in addition to life insurance protection; however, it may be unsuitable as a short-term investment due to the costs of insurance and the expenses charged.

2. The table in the sub-section entitled "Policy Features" within the "Overview" section of the Prospectus is deleted and replaced with the following:

*  There is no charge for the Accelerated Death Benefit for Terminal Illness Agreement or the Premium Deposit Account Agreement.

The following tables describe the fees and expenses that you will pay when buying, owning, surrendering, or making withdrawals from the Policy. Except as otherwise specifically noted in the tables below, the fees and expenses are the same for all versions of the product. The charges may not be representative of the charges you will pay. Your Policy's data pages indicate the charges applicable to your Policy. More information about your charges is available upon request by contacting us at the telephone number or address listed on the cover page of this prospectus.

2017 CSO Policy (Version 1)

2017 CSO Policy (Version 2)

(1) The charges for the Waiver of Premium Agreement, Waiver of Charges Agreement, Accidental Death Benefit Agreement, Level Term Insurance Agreement, Guaranteed Insurability Option, Long Term Care Agreement and Accelerated Death Benefit for Chronic Illness Agreement vary based on the insured's gender, Risk Class, Age, and Death Benefit option.

(2) The maximum Waiver of Premium Charge assumes that the insured has the following characteristics: Female, Standard Tobacco, Age 59, Increasing Death Benefit Option.

(3) The minimum Waiver of Premium Charge assumes that the insured has the following characteristics: Female, Preferred Non-Tobacco, Age 0, Level Death Benefit Option.

(4) The maximum Waiver of Charges Charge assumes that the insured has the following characteristics: Male, Standard Tobacco, Age 59, Increasing Death Benefit Option.

(5) The minimum Waiver of Charges Charge assumes that the insured has the following characteristics: Female, Preferred Non-Tobacco, Age 0, Increasing Death Benefit Option.

(6) The maximum Accidental Death Benefit Agreement Charge assumes that the insured has the following characteristics: Male, Standard Tobacco, Issue Age 70.

(7) The minimum Accidental Death Benefit Agreement Charge assumes that the insured has the following characteristics: Male, Preferred Non-Tobacco, Issue Age 0.

(8) The maximum Level Term Insurance Charge assumes that the insured has the following characteristics: Male, Standard Tobacco, Age 90, Level Death Benefit Option.

(9) The minimum Level Term Insurance Charge assumes that the insured has the following characteristics: Female, Preferred Non-Tobacco, Age 6, Level Death Benefit Option.

(10) The Guaranteed Insurability Option (GIO) Charge varies based upon the insured's gender, Risk Class, Age and the amount of additional coverage later that is elected when the GIO is purchased. See the Guaranteed Insurability Option discussion in the section entitled "Supplemental Agreements."

(11) The maximum Guaranteed Insurability Charge assumes that the insured has the following characteristics: Male, Standard Non-Tobacco, Age 37.

(12) The minimum Guaranteed Insurability Charge assumes that the insured has the following characteristics: Male, Standard Non-Tobacco, Age 0.

(13) See the Long Term Care Agreement discussion in the section entitled "Supplemental Agreements."

(14) The maximum Long Term Care Agreement Charge assumes that the insured has the following characteristics: Female, Standard Tobacco, Issue Age 80, 4% monthly benefit.

(15) The minimum Long Term Care Agreement Charge assumes that the insured has the following characteristics: Female, Preferred Non-Tobacco, Issue Age 20, 2% monthly benefit.

(16) The maximum Long Term Care Agreement Charge assumes that the insured has the following characteristics: Female, Standard Tobacco, Issue Age 80, 24-month benefit period.

(17) The minimum Long Term Care Agreement Charge assumes that the insured has the following characteristics: Female, Preferred Non-Tobacco, Issue Age 20, 72-month benefit period.

(18) The Inflation Agreement Charge is the same for all genders, Risk Classes, and Ages. See the Inflation Agreement discussion in the section entitled "Supplemental Agreements."

(19) The Guaranteed Insurability Option for Business (GIOB) Charge varies based upon the insured's Age and tobacco status. See the Guaranteed Insurability Option for Business discussion in the section entitled "Supplemental Agreements."

(20) The maximum Guaranteed Insurability Option for Business Charge assumes that the insured has the following characteristics: Male, Standard Tobacco, Age 54.

(21) The minimum Guaranteed Insurability Option for Business Charge assumes that the insured has the following characteristics: Female, Standard Non-Tobacco, Age 18.

(22) The Business Continuation Agreement Charge varies based upon the insured's Age and tobacco status. See the Business Continuation Agreement discussion in the section entitled "Supplemental Agreements."

(23) The maximum Business Continuation Charge assumes that the insured has the following characteristics: Insured Male, Standard Tobacco, Age 55, Designated Insured Male Standard Tobacco, Age 70.

(24) The minimum Business Continuation Charge assumes that the insured has the following characteristics: Insured Male, Standard Non-Tobacco, Age 18, Designated Insured Male Non-Tobacco, Age 18.

(25) The maximum Death Benefit Guarantee Flex Charge assumes that the insured has the following characteristics: Female, Standard Tobacco, Age 75.

(26) The minimum Death Benefit Guarantee Flex Charge assumes that the insured has the following characteristics: Female, Preferred Non-tobacco, Age 0.

(27) See the Accelerated Death Benefit for Chronic Illness Agreement discussion in the section entitled "Supplemental Agreements."

(28) The maximum Accelerated Death Benefit for Chronic Illness Agreement Charge assumes that the insured has the following characteristics: Female, Standard Tobacco, Issue Age 80, 4% monthly benefit.

(29) The minimum Accelerated Death Benefit for Chronic Illness Agreement Charge assumes that the insured has the following characteristics: Female, Preferred Non-Tobacco, Issue Age 20, 2% monthly benefit.

(30) The maximum Level Term Insurance Charge assumes that the insured has the following characteristics: Male, Standard Tobacco, Age 99, Level Death Benefit Option.

(31) The minimum Level Term Insurance Charge assumes that the insured has the following characteristics: Female, Preferred Non-Tobacco, Age 10, Level Death Benefit Option.

(32) The maximum No Lapse Guarantee Agreement Charge assumes that the insured has the following characteristics: Female, Standard Tobacco, Age 75.

(33) The minimum No Lapse Guarantee Agreement Charge assumes that the insured has the following characteristics: Female, Preferred, Non-Tobacco, Age 0.

(34) The maximum No Lapse Guarantee Agreement Charge assumes that the insured has the following characteristics: Male, Standard Tobacco, Age 75.

(35) The minimum No Lapse Guarantee Agreement Charge assumes that the insured has the following characteristics: Male, Standard Non-Tobacco, Age 55.

* Unless otherwise stated, the Guaranteed Charge is the maximum Periodic Charge that may be assessed under the Policy.

** The Waiver of Charges Agreement, Accidental Death Benefit Agreement, Children's Term Agreement, Guaranteed Insurability Option for Business Agreement, Business Continuation Agreement and Death Benefit Guarantee Flex Agreement are no longer available for purchase.

Premium Charge. Prior to allocation of a premium payment, we assess a charge from each premium payment to compensate us for distribution and administrative expenses and certain taxes associated with our issuance and maintenance of the Policy. We credit the remaining amount (the Net Premium) to your Policy's Accumulation Value according to your allocation instructions. Please refer to the tables within the "Fee Tables" section of the Prospectus for a description of the premium charges.

Cost of Insurance Charge. We assess a monthly Cost of Insurance Charge to compensate us for underwriting the Death Benefit. The charge depends on a number of variables (insured's Age, gender, Risk Class, and Face Amount) that would cause it to vary from Policy to Policy and from monthly Policy Anniversary to monthly Policy Anniversary. We calculate the Cost of Insurance Charge separately for the Initial Face Amount and for any increase in Face Amount, each a coverage layer. If we approve an increase in your Policy's Face Amount, a different Risk Class (and a different cost of insurance rate) may apply to the increase, based on the insured's circumstances at the time of the increase in Face Amount.

The cost of insurance charge for a coverage layer is the Net Amount at Risk for the coverage layer multiplied by the applicable cost of insurance rate. The Net Amount at Risk varies with investment performance, the payment of premiums and the assessment of Policy charges. The Net Amount at Risk is equal to the Death Benefit payable divided by the Net Amount at Risk divisor, as shown on the data pages of your Policy, minus the Accumulation Value of the Policy.

The actual monthly cost of insurance rates are based on our expectations as to future mortality and expense experience. The rates will never be greater than the maximum guaranteed cost of insurance rates for the Initial Face Amount shown on the Policy data pages of your Policy. The maximum guaranteed cost of insurance rates for any increase in Face Amount will be shown on the Policy data pages we send to you at the time of the increase in Face Amount. Please refer to the tables within the "Fee Tables" section of the Prospectus for a description of the cost of insurance charges.

We occasionally review the adequacy of our cost of insurance rates and may adjust those charges prospectively depending upon our expectations about our future mortality and expense experience, lapse rates, Accumulation Value allocation, policy duration, taxes, investment earnings and profit considerations. Any change in the cost of insurance rates will apply to all persons of the same Age, Risk Class, and number of full years insurance has been in force.

In general the longer you own your Policy, the higher the cost of insurance rate will be as the insured grows older. Also our cost of insurance rates will generally be lower if the insured is a female than if a male, unless we issue the Policy on a unisex basis. Similarly, our current cost of insurance rates are generally lower for non-tobacco users than tobacco users, and for persons considered to be in excellent health. On the other hand, insureds who present particular health, occupational or non-work related risks may require higher cost of insurance rates under their Policies.

We assess a monthly Mortality and Expense Risk charge to compensate us for certain mortality and expense risks we assume. The mortality risk is that the insured will live for a shorter time than we project. The expense risk is that the expenses that we incur will exceed the administrative charge limits we set in the Policy. Please refer to the tables within the "Fee Tables" section of the Prospectus for a description of the mortality and expense risk charges.

If this charge does not cover our actual costs, we may absorb any such loss. Conversely, if the charge more than covers actual costs, the excess is added to our surplus. We expect to profit from this charge and may use these profits for any lawful purpose including covering distribution expenses.

Surrender Charge. If your Policy terminates or you fully surrender your Policy during the first 15 Policy Years or within 15 years after any increase in Face Amount, we assess a surrender charge from your Accumulation Value and pay the remaining amount (less any unpaid Policy charges, outstanding Policy loan and accrued interest) to you. The payment you receive is called the Surrender Value.

The surrender charge equals the sum of any remaining Policy Issue Charges for the Initial Face Amount or the Face Amount increase, as applicable, measured from Policy Termination or full surrender to the end of the 15 year surrender charge period. Increases in Face Amount have their own surrender charge penalty period. The surrender charge is equal to the greater of a) the standard nonforfeiture law maximums, or b) the lesser of 60 times the monthly PIC charge or the sum of any remaining Policy Issue Charges for the Initial Face Amount or Face Amount increase, multiplied by a factor of 3.75, as applicable. The Surrender Charge may be significant. You should carefully calculate these charges before you request a surrender or increase in Face Amount. Under some circumstances, the level of Surrender Charges might result in no Surrender Value being available.

We assess the Surrender Charge to compensate us partially for the cost of administering, issuing, and selling the Policy, including agent sales commissions, the cost of printing the prospectuses and sales literature, any advertising costs, medical exams, review of Applications for insurance, processing of the Applications, establishing Policy records, and Policy issue. We do not expect Surrender Charges to cover all of these costs. To the extent that they do not, we will cover the short-fall from our General Account assets, which may include profits from the mortality and expense risk charge and cost of insurance charge.

For example, if you surrender your Policy within the first 15 Policy Years or during the first 15 years following an increase in Face Amount, you could pay a Surrender Charge of up to $6,000.00 based on a $100,000 Face Amount, representing a charge of 6% of the Policy's Face Amount. Because Policy Issue Charges can be higher for Policies with greater Face Amounts, the Surrender Charge, both as a dollar amount and as a percentage of the Policy's Face Amount, may increase for Policies with higher Face Amounts. The maximum surrender charge is 6% of the Policy Face Amount.

Level Term Insurance Agreement. The Level Term Insurance Agreement is no longer available for purchase for 2001 CSO policies. The Level Term Insurance Agreement is subject to underwriting approval and provides additional level term insurance coverage on the life of the insured. For Agreements issued with Defender 2001 CSO, the Level Term Insurance Agreement provides coverage until the anniversary nearest the insured's Age 90, at which time it will terminate. For Agreements issued with Defender 2017 CSO Policy (Version 1) and (Version 2), the Level Term Insurance Agreement provides coverage until the anniversary nearest the insured's Age 100, at which time it will terminate. We assess a separate monthly charge for this Agreement. For example, if you were to elect this Agreement to provide an additional $250,000 in Death Benefits, this additional $250,000 would be payable to the beneficiary upon your death if this Agreement is still in force. Note that the Level Term Insurance Agreement has no cash or loan values and does not modify any cash or loan values of this Policy.

Please retain this supplement for future reference.

F112341 08-2026