ASSET ACCUMULATOR

ASSET PORTFOLIO MANAGER

CORPORATE BENEFITS

ESTATE DESIGNER

FIRSTLINE

FIRSTLINE II

STRATEGIC ADVANTAGE I AND II

STRATEGIC INVESTOR

VARIABLE SURVIVORSHIP

FLEXIBLE PREMIUM ADJUSTABLE VARIABLE UNIVERSAL LIFE
INSURANCE POLICIES

issued by

Security Life of Denver Insurance Company

and its

Security Life Separate Account L1

Supplement Dated May 14, 2020

This supplement updates and amends your current prospectus and subsequent supplements thereto. Please read it carefully and keep it with your prospectus for future reference. Capitalized terms not defined in this supplement shall have the meaning given to them in your prospectus.

__________________________________________________________________________

IMPORTANT INFORMATION ABOUT THE INTERNET AVAILABILITY
OF FUND SHAREHOLDER REPORTS

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the shareholder reports for the funds available through your policy will no longer be sent by mail, unless you specifically request paper copies of the reports from the Company. Instead, the reports will be made available on a website, and you will be notified by mail each time a report is posted and provided with a website link to access the report.

If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. If available, you may elect to receive shareholder reports and other communications from the Company electronically by contacting Customer Service.

You may elect to receive all future reports in paper free of charge. You can inform the Company that you wish to continue receiving paper copies of your shareholder reports by calling 1-800-283-3427. Your election to receive reports in paper will apply to all funds available under your policy.

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IMPORTANT INFORMATION ABOUT THE FUNDS AVAILABLE THROUGH THE POLICIES

The following chart lists the funds that are currently available through the policies, along with each fund’s investment adviser/subadviser and investment objective. More detailed information about these funds can be found in the current prospectus and Statement of Additional Information for each fund. If you received a summary prospectus for any of the funds available through your policy, you may obtain a full prospectus and other fund information free of charge by either accessing the internet address, calling the telephone number or sending an email request to the email address shown on the front of the fund’s summary prospectus.

There is no assurance that the stated investment objectives of any of the funds will be achieved. Shares of the funds will rise and fall in value and you could lose money by allocating policy value to the subaccounts that invest in the funds. Shares of the funds are not bank deposits and are not guaranteed, endorsed or insured by any financial institution, the Federal Deposit Insurance Corporation or any other government agency. Except as noted, all funds are diversified, as defined under the 1940 Act.

Fund Name Investment Adviser/Subadviser	Investment Objective(s)
American Funds Insurance Series® – Growth Fund (Class 2)        Investment Adviser:  Capital Research and Management CompanySM	Seeks growth of capital.
American Funds Insurance Series® – Growth-Income Fund (Class 2) Investment Adviser:  Capital Research and Management CompanySM	Seeks long-term growth of capital and income.
American Funds Insurance Series® – International Fund (Class 2) Investment Adviser:  Capital Research and Management CompanySM	Seeks long-term growth of capital.
BlackRock Global Allocation V.I. Fund (Class III) Investment Adviser:  BlackRock Advisors, LLC	Seeks high total investment return.
Fidelity® VIP ContrafundSM Portfolio (Service Class) Investment Adviser:  Fidelity Management & Research Company, LLC is the fund’s manager. Other investment advisers serve as subadvisers for the fund.	Seeks long-term capital appreciation.
Fidelity® VIP Equity-Income PortfolioSM (Service Class) Investment Adviser:  Fidelity Management & Research Company, LLC is the fund’s manager. Other investment advisers serve as subadvisers for the fund.	Seeks reasonable income. Also considers the potential for capital appreciation. Seeks to achieve a yield which exceeds the composite yield on the securities comprising the S&P 500® Index.

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Fund Name Investment Adviser/Subadviser	Investment Objective(s)
M Capital Appreciation Fund[1] Investment Adviser:  M Financial Investment Advisers, Inc. Subadviser:Frontier Capital Management Company, LLC	Seeks to provide maximum capital appreciation.
M International Equity Fund1,[2] Investment Adviser:  M Financial Investment Advisers, Inc. Subadviser:Dimensional Fund Advisors, LP	Seeks to provide long-term capital appreciation.
M Large Cap Growth Fund1 Investment Adviser:  M Financial Investment Advisers, Inc. Subadviser:DSM Capital Partners LLC	Seeks to provide long-term capital appreciation.
M Large Cap Value Fund1 Investment Adviser:  M Financial Investment Advisers, Inc. Subadviser:  AJO, LP	Seeks to provide long-term capital appreciation.
Neuberger Berman AMT Sustainable Equity Portfolio (Class I) Investment Adviser:Neuberger Berman Investment Advisers LLC	Seeks long-term growth of capital by investing primarily in securities of companies that meet the Fund’s environmental, social and governance (ESG) criteria.
Voya Balanced Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:  Voya Investment Management Co. LLC	Seeks total return consisting of capital appreciation (both realized and unrealized) and current income; the secondary investment objective is long-term capital appreciation.
Voya Global Bond Portfolio (Class S) Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks to maximize total return through a combination of current income and capital appreciation.
Voya Global High Dividend Low Volatility Portfolio (Class I)[3], [4] Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks long-term capital growth and current income.

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Fund Name Investment Adviser/Subadviser	Investment Objective(s)
Voya Global Perspectives® Portfolio (Class I)2 Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks total return.
Voya Government Liquid Assets Portfolio (Classes I and S)[5] Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks high level of current income consistent with the preservation of capital and liquidity.
Voya Growth and Income Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks to maximize total return through investments in a diversified portfolio of common stock and securities convertible into common stocks. It is anticipated that capital appreciation and investment income will both be major factors in achieving total return.
Voya High Yield Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:  Voya Investment Management Co. LLC	Seeks to provide investors with a high level of current income and total return.
Voya Index Plus LargeCap Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks to outperform the total return performance of the S&P 500® Index while maintaining a market level of risk.
Voya Index Plus MidCap Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks to outperform the total return performance of the S&P MidCap 400® Index while maintaining a market level of risk.
Voya Index Plus SmallCap Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks to outperform the total return performance of the S&P SmallCap 600® Index while maintaining a market level of risk.
Voya Intermediate Bond Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks to maximize total return consistent with reasonable risk. The Portfolio seeks its objective through investments in a diversified portfolio consisting primarily of debt securities. It is anticipated that capital appreciation and investment income will both be major factors in achieving total return.

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Fund Name Investment Adviser/Subadviser	Investment Objective(s)
Voya International High Dividend Low Volatility Portfolio (Class I)3 Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks maximum total return.
Voya International Index Portfolio (Class S) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks investment results (before fees and expenses) that correspond to the total return (which includes capital appreciation and income) of a widely accepted international index.
Voya Large Cap Growth Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks long-term capital growth.
Voya Large Cap Value Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks long-term growth of capital and current income.
Voya Limited Maturity Bond Portfolio (Class S) Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks highest current income consistent with low risk to principal and liquidity and secondarily, seeks to enhance its total return through capital appreciation when market factors, such as falling interest rates and rising bond prices, indicate that capital appreciation may be available without significant risk to principal.
Voya MidCap Opportunities Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:  Voya Investment Management Co. LLC	Seeks long-term capital appreciation.
Voya Retirement Growth Portfolio (Class I)2 Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks a high level of total return (consisting of capital appreciation and income) consistent with a level of risk that can be expected to be greater than that of Voya Retirement Moderate Growth Portfolio.

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Fund Name Investment Adviser/Subadviser	Investment Objective(s)
Voya Retirement Moderate Growth Portfolio (Class I)2 Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks a high level of total return (consisting of capital appreciation and income) consistent with a level of risk that can be expected to be greater than that of Voya Retirement Moderate Portfolio but less than that of Voya Retirement Growth Portfolio.
Voya Retirement Moderate Portfolio (Class I)2 Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks a high level of total return (consisting of capital appreciation and income) consistent with a level of risk that can be expected to be greater than that of Voya Retirement Conservative Portfolio but less than that of Voya Retirement Moderate Growth Portfolio.
Voya RussellTM Large Cap Growth Index Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks investment results (before fees and expenses) that correspond to the total return (which includes capital appreciation and income) of the Russell Top 200® Growth Index.
Voya RussellTM Large Cap Index Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks investment results (before fees and expenses) that correspond to the total return (which includes capital appreciation and income) of the Russell Top 200® Index.
Voya RussellTM Large Cap Value Index Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks investment results (before fees and expenses) that correspond to the total return (which includes capital appreciation and income) of the Russell Top 200® Value Index.
Voya RussellTM Mid Cap Growth Index Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks investment results (before fees and expenses) that correspond to the total return (which includes capital appreciation and income) of the Russell Midcap® Growth Index.
Voya RussellTM Small Cap Index Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks investment results (before fees and expenses) that correspond to the total return (which includes capital appreciation and income) of the Russell 2000® Index.
Voya Small Company Portfolio (Class S) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks growth of capital primarily through investment in a diversified portfolio of common stock of companies with smaller market capitalizations.

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Fund Name Investment Adviser/Subadviser	Investment Objective(s)
Voya SmallCap Opportunities Portfolio (Class I) Investment Adviser:Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks long-term capital appreciation.
Voya Solution Moderately Aggressive Portfolio (Class I)2 Investment Adviser:  Voya Investments, LLC Subadviser:  Voya Investment Management Co. LLC	Seeks to provide capital growth through a diversified asset allocation strategy.
Voya U.S. Bond Index Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks investment results (before fees and expenses) that correspond to the total return (which includes capital appreciation and income) of the Bloomberg Barclays U.S. Aggregate Bond Index.
Voya U.S. Stock Index Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:Voya Investment Management Co. LLC	Seeks total return.
VY® Baron Growth Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:  BAMCO, Inc.	Seeks capital appreciation.
VY® Clarion Global Real Estate Portfolio (Class S) Investment Adviser:  Voya Investments, LLC Subadviser:  CBRE Clarion Securities LLC	Seeks high total return consisting of capital appreciation and current income.
VY® Columbia Small Cap Value II Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:  Columbia Management Investment Advisers, LLC	Seeks long-term growth of capital.
VY® Invesco Comstock Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:Invesco Advisers, Inc.	Seeks capital growth and income.

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Fund Name Investment Adviser/Subadviser	Investment Objective(s)
VY® Invesco Equity and Income Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:Invesco Advisers, Inc.	Seeks total return consisting of long-term capital appreciation and current income.
VY® Invesco Growth and Income Portfolio (Class S) Investment Adviser:  Voya Investments, LLC Subadviser:Invesco Advisers, Inc.	Seeks long-term growth of capital and income.
VY® Invesco Oppenheimer Global Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:Invesco Advisers, Inc.	Seeks capital appreciation.
VY® JPMorgan Emerging Markets Equity Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:J.P. Morgan Investment Management Inc.	Seeks capital appreciation.
VY® JPMorgan Small Cap Core Equity Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:J.P. Morgan Investment Management Inc.	Seeks capital growth over the long-term.
VY® T. Rowe Price Capital Appreciation Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:T. Rowe Price Associates, Inc.	Seeks, over the long-term, a high total investment return, consistent with the preservation of capital and with prudent investment risk.
VY® T. Rowe Price Diversified Mid Cap Growth Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:T. Rowe Price Associates, Inc.	Seeks long-term capital appreciation.
VY® T. Rowe Price Equity Income Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:T. Rowe Price Associates, Inc.	Seeks a high level of dividend income as well as long-term growth of capital primarily through investments in stocks.

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Fund Name Investment Adviser/Subadviser	Investment Objective(s)
VY® T. Rowe Price International Stock Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:T. Rowe Price Associates, Inc.	Seeks long-term growth of capital.

IMPORTANT INFORMATION ABOUT FUNDS

CLOSED TO NEW INVESTMENT

The subaccounts that invest in the following funds have been closed to new investment:

Fund Name Investment Adviser/Subadviser	Investment Objective(s)
Fidelity® VIP Investment Grade Bond Portfolio (Initial Class) Investment Adviser:  Fidelity Management & Research Company, LLC is the fund’s manager. Other investment advisers serve as subadvisers for the fund.	Seeks as high a level of current income as is consistent with the preservation of capital.
Invesco V.I. Core Equity Fund (Series I) Investment Adviser:  Invesco Advisers, Inc.	Seeks long-term growth of capital.
VanEck VIP Global Hard Assets Fund (Initial Class)[6] Investment Adviser:  Van Eck Associates Corporation	Seeks long-term capital appreciation by investing primarily in hard asset securities. Income is a secondary consideration.
Voya Strategic Allocation Conservative Portfolio(Class I)2 Investment Adviser:  Voya Investments, LLC Subadviser:  Voya Investment Management Co. LLC	Seeks to provide total return (i.e., income and capital growth, both realized and unrealized) consistent with preservation of capital.
Voya Strategic Allocation Growth Portfolio(Class I)2 Investment Adviser:  Voya Investments, LLC Subadviser:  Voya Investment Management Co. LLC	Seeks to provide capital appreciation.
Voya Strategic Allocation Moderate Portfolio(Class I)2 Investment Adviser:  Voya Investments, LLC Subadviser:  Voya Investment Management Co. LLC	Seeks to provide total return (i.e., income and capital appreciation, both realized and unrealized).

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Fund Name Investment Adviser/Subadviser	Investment Objective(s)
VY® American Century Small-Mid Cap Value Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:  American Century Investment Management, Inc.	Seeks long-term capital growth. Income is a secondary objective.
VY® JPMorgan Mid Cap Value Portfolio (Class I) Investment Adviser:  Voya Investments, LLC Subadviser:J.P. Morgan Investment Management Inc.	Seeks growth from capital appreciation.

Policy owners who have policy value allocated to one or more of the subaccounts that correspond to these funds may leave their policy value in those subaccounts, but future allocations and transfers into those subaccounts are prohibited. If your most recent premium allocation instructions includes a subaccount that corresponds to one of these funds, premium received that would have been allocated to a subaccount corresponding to one of these funds may be automatically allocated among the other available subaccounts according to your most recent premium allocation instructions. If your most recent allocation instructions do not include any available funds, you must provide us with alternative allocation instructions or the premium payment will be returned to you. You may give us alternative allocation instructions by contacting Customer Service at P.O. Box 5065, Minot, ND 58702-5065, 1-877-253-5050 or www.voyalifecustomerservice.com. See the Transfers section of your policy prospectus for information about making fund allocation changes.

Your failure to provide us with alternative allocation instructions before we return your premium payment(s) may result in your policy entering the 61 day grace period and/or your policy lapsing without value. See the Lapse section of your policy prospectus for more information about how to keep your policy from lapsing. See also the Reinstatement section of your policy prospectus for information about how to put your policy back in force if it has lapsed.

IMPORTANT INFORMATION ABOUT THE
CORONAVIRUS PANDEMIC

In response to the coronavirus pandemic, the Company will, for qualified individuals (as defined below), extend the grace period for payment of premiums. This extension of the grace period will be available for a limited period of time and will be subject to certain conditions and restrictions that we will impose on a non-discriminatory basis.

A “qualified individual” is an individual in one of the following categories:

·The individual is diagnosed with the virus SARS-CoV-2 or with coronavirus disease 2019 (“COVID-19”) by a test approved by the Centers for Disease Control and Prevention;

·The individual’s spouse or dependent is diagnosed with such virus or disease; or

·The individual experiences adverse financial consequences as a result of being quarantined, being furloughed or laid off or having work hours reduced due to such virus or disease, being unable to work due to lack of child care due to such virus or disease, closing or reducing hours of a business owned or operated by the individual due to such virus or disease, or other factors as determined by Internal Revenue Service.

To determine your eligibility for extension of the grace period, please contact Customer Service.

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MORE INFORMATION IS AVAILABLE

More information about the funds available through your policy, including information about the risks associated with investing in them, can be found in the current prospectus and Statement of Additional Information for each fund. You may obtain these documents by contacting:

Customer Service

P.O. Box 5065

Minot, ND 58702-5065

1-877-253-5050

If you received a summary prospectus for any of the funds available through your policy, you may obtain a full prospectus and other fund information free of charge by either accessing the internet address, calling the telephone number or sending an email request to the email address shown on the front of the fund’s summary prospectus.

[1]This fund is only available through broker/dealers associated with the M Financial Group.

[2]This fund is structured as a “fund of funds.” A fund structured as a “fund of funds” may have higher fees and expenses than a fund that invests directly in debt and equity securities because it also incurs the fees and expenses of the underlying funds in which it invests. Please refer to the fund prospectus for information about the aggregate annual operating expenses of the fund and its corresponding underlying fund or funds.

[3]This fund employs a managed volatility strategy. A managed volatility strategy is a strategy that is intended to reduce a fund’s overall volatility and downside risk and, thereby, help us manage the risks associated with providing certain guarantees under the policy. During rising markets, the hedging strategies employed to manage volatility could result in your variable account value rising less than would have been the case if you had been invested in a fund with substantially similar investment objectives, policies and strategies that does not utilize a volatility management strategy. In addition, the cost of these hedging strategies may have a negative impact on investment performance. On the other hand, investing in funds with a managed volatility strategy may be helpful in a declining market with higher market volatility because the hedging strategy will reduce your equity exposure in such circumstances. In such cases, your variable account value may decline less than would have been the case if you had not invested in funds with a managed volatility strategy. There is no guarantee that a managed volatility strategy can achieve or maintain the fund’s optimal risk targets, and the fund may not perform as expected

[4] Prior to May 1, 2020, this fund was known as the Voya Global Equity Portfolio.

[5]Class I shares of this fund are available in the following products:  Estate Designer, FirstLine, FirstLine II, Strategic Advantage I and II and Variable Survivorship. Class S shares of this fund are available in the following products:  Asset Accumulator, Asset Portfolio Manager, Corporate Benefits and Strategic Investor.

[6]The VanEck VIP Global Hard Assets Fund was never offered as an investment option in the Corporate Benefits product.

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