HIMCO VIT Index Fund HIMCO VIT Portfolio Diversifier Fund

Supplement to Statutory Prospectuses, Summary Prospectuses, and Combined Statement of Additional Information, each dated April 30, 2017, as supplemented to date

April 16, 2018

Suspension of Sales. Effective Friday, April 20, 2018, shares of each of HIMCO VIT Index Fund and HIMCO VIT Portfolio Diversifier Fund will no longer be available for purchase. HIMCO VIT Index Fund and HIMCO VIT Portfolio Diversifier Fund are expected to be reorganized into BlackRock S&P 500 Index V.I. Fund and BlackRock Managed Volatility V.I. Fund, respectively, on or about Monday, April 23, 2018.

This Supplement should be retained with your Summary Prospectus, Prospectus, and SAI for future

reference.

April 2018

HIMCO VIT Index Fund

Class IA: HVIAX Class IB: HVIIX

Class IA and IB Shares

Prospectus

April 30, 2017

Mutual funds are not bank deposits and are not insured or guaranteed by the Federal Deposit Insurance Corporation or

any other government agency. Because you could lose money by investing in the Fund, be sure to read all risk disclosures

carefully before investing.

As with all mutual funds, the Securities and Exchange Commission and the Commodity Futures Trading Commission havenot approved or disapproved these securities or passed upon the adequacy of this Prospectus. Any representation to the

contrary is a criminal offense.

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CONTENTS

Summary Section ......................................................................................4Additional Information Regarding Risks and Investment Strategies................8The Investment Manager .........................................................................12Further Information on the Fund................................................................14Legal Proceedings ...................................................................................20Performance Notes..................................................................................21Financial Highlights .................................................................................22For More Information ...............................................................................25

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HIMCO VIT INDEX FUND

SUMMARY SECTIONINVESTMENT GOAL. The Fund seeks to provide investment results which approximate the price and yield performance ofpublicly traded common stocks in the aggregate.

YOUR EXPENSES. The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund.Please note that fees and expenses in this table and the examples below do not include fees and expenses that will beapplied at the variable annuity or variable life insurance contract level or by a qualified employee benefit plan and would behigher if such fees and expenses were included. You should review your variable contract prospectus (or other disclosuredocument) or plan documents for more information on those fees and expenses.

Shareholder Fees

(fees paid directly from your investment) Share Classes

IA IB

Maximum sales charge (load) as a percentage of offering price Not applicable Not applicable

Maximum deferred sales charge (load) Not applicable Not applicable

Exchange fees None None

Annual Fund Operating Expenses

(expenses that are deducted from the fund’s assets) IA IB

Management fees 0.30% 0.30%

Distribution and service (12b-1) fees None 0.25%

Other expenses 0.08% 0.08%

Total annual fund operating expenses 0.38% 0.63%

Fee waiver and/or expense reimbursement (1) 0.05% 0.05%

Total annual fund operating expenses after fee waiver and/or expense reimbursement 0.33% 0.58%

(1) Hartford Investment Management Company has contractually agreed to reimburse expenses (exclusive of taxes, interestexpense, brokerage commissions, acquired fund fees and expenses and extraordinary expenses) to the extent necessary tomaintain total annual operating expenses as follows: 0.33% (Class IA) and 0.58% (Class IB). This contractual arrangement willremain in effect until April 30, 2018, and shall renew automatically for one-year terms unless the investment manager provideswritten notice of termination prior to the start of the next term or upon approval of the Board of Trustees of the Fund.

EXAMPLE. The examples below are intended to help you compare the cost of investing in the Fund with the cost of investing inother mutual funds. The examples assume that:

• Your investment has a 5% return each year

• The Fund’s operating expenses remain the same (except that the examples reflect the expense limitationarrangements for only the first year)

• You reinvest all dividends and distributions.

Your actual costs may be higher or lower. Based on these assumptions, for every $10,000 invested, you would pay thefollowing expenses if you sell all of your shares at the end of each time period indicated:

Expenses (with or without redemption) Year 1 Year 3 Year 5 Year 10

IA $ 34 $ 117 $ 208 $ 476IB $ 59 $ 197 $ 346 $ 782

PORTFOLIO TURNOVER. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turnsover” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflectedin annual Fund operating expenses or in the examples, affect the Fund’s performance. During the most recent fiscal year, theFund’s portfolio turnover rate was 12% of the average value of its portfolio.

PRINCIPAL INVESTMENT STRATEGY. The Fund uses the Standard & Poor’s 500 Index (the “Index”) as its standard performancecomparison because it represents a significant proportion of the total market value of all common stocks, is well known toinvestors and, in the opinion of the Fund’s investment manager, Hartford Investment Management Company (“HartfordInvestment Management”), is representative of the performance of publicly-traded common stocks. Therefore, the Fund

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attempts to approximate the capital performance and dividend income of the Index. The Index is comprised of 500 selectedcompanies, most of which are listed on the New York Stock Exchange. The portfolio managers generally invest in no fewer than495 companies included in the Index. Hartford Investment Management selects stocks for the Fund’s portfolio after taking intoaccount their individual weights in the Index. Hartford Investment Management does not attempt to “manage” the Fund’sportfolio in the traditional sense, using economic, financial and market analysis, nor does the adverse financial situation of acompany directly result in its elimination from the Fund’s portfolio unless, of course, the company is removed from the Index.

MAIN RISKS. The primary risks of investing in the Fund are described below. When you sell your shares they may be worth moreor less than what you paid for them, which means that you could lose money as a result of your investment. An investment in

the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other

government agency. As with any fund, there is no guarantee that the Fund will achieve its goal. For more information regardingrisks and investment matters please see “Additional Information Regarding Risks and Investment Strategies” in thisprospectus.

Equity Securities Risk – The risk that the price of equity or equity-related securities may decline due to changes in acompany’s financial condition and overall market and economic conditions.

Market Risk – Market risk is the risk that one or more markets in which the Fund invests will go down in value, includingthe possibility that the markets will go down sharply and unpredictably. Securities may decline in value due to the activities andfinancial prospects of individual companies or to general market and economic movements and trends, including adversechanges to credit markets.

Index Strategy Risk – The Fund is not actively managed, but instead is designed to match the Index. Therefore, theadverse performance of a particular stock ordinarily will not result in the elimination of the stock from the Fund’s portfolio. TheFund will remain invested in stocks even when stock prices are generally falling.

Large Cap Stock Risk – Larger companies may not be able to respond as quickly to competitive challenges or to changesin technology, product or other market conditions. They also may not be able to maintain high growth rates compared tosmaller well-managed companies, particularly during extended periods of economic expansion.

Tracking Error Risk – The Fund’s performance may not match or correlate to that of its reference Index, either on a dailyor aggregate basis. Factors such as cash flows, Fund expenses, imperfect correlation between the Fund’s portfolio and thecomponent securities of the Index, rounding of share prices, asset valuation, timing variances, changes to the composition ofthe Index and regulatory requirements may cause the Fund’s performance to diverge from the performance of the Index.Tracking error risk may cause the Fund’s performance to be less than expected.

The Fund is subject to certain other risks, which are described elsewhere in the Fund’s statutory prospectus.

PAST PERFORMANCE. The performance information below provides an indication of the risks of investing in the Fund. The Fundis the successor to the investment performance of the Hartford Index HLS Fund (the “Predecessor Fund”) as a result of thereorganization of the Predecessor Fund into the Fund on October 20, 2014. Therefore, the performance information shownbelow for periods prior to October 20, 2014 is that of the Predecessor Fund. Hartford Funds Management Company, LLCserved as the investment manager to the Predecessor Fund and Hartford Investment Management, the Fund’s investmentmanager, served as the sub-adviser to the Predecessor Fund. The Predecessor Fund had the same investment objective andstrategies as the Fund. Keep in mind that past performance does not indicate future results. The returns:

• Assume reinvestment of all dividends and distributions

• Would be lower if the Fund’s operating expenses had not been limited

• Would be lower if the effect of sales charges or other fees that may be applied at the contract or plan level wereincluded.

The bar chart:

• Shows how the Fund’s total return has varied from year to year

• Shows the returns of the Fund’s Class IA shares. Because all of the Fund’s shares are invested in the same portfolioof securities, returns for the Fund’s Class IB shares differ only to the extent that the classes do not have the sameexpenses.

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Total returns by calendar year

Highest/Lowest quarterly results during the periods shown in the bar chart were:

Highest 15.80% (2nd quarter, 2009) Lowest -21.97% (4th quarter, 2008)

AVERAGE ANNUAL TOTAL RETURNS. The table below shows returns for the Fund over time compared to those of a broad-basedmarket index. For more information regarding returns see the “Performance Notes” section in the Fund’s statutory prospectus.

Average annual total returns for periods ending 12/31/16

Share Classes 1 Year 5 Years 10 Years

Class IA 11.59% 14.29% 6.63%

Class IB 11.34% 14.00% 6.37%

S&P 500 Index(reflects no deduction for fees, expenses or taxes) 11.96% 14.66% 6.95%

MANAGEMENT. The Fund’s investment manager is Hartford Investment Management.

Portfolio Managers Title Involved with Fund Since

Edward Caputo, CFA Senior Vice President 2014

Paul Bukowski, CFA Executive Vice President and Head of Quantitative Equities and Asset Allocation 2014

PURCHASE AND SALE OF FUND SHARES. The Fund sells its shares at net asset value (“NAV”) directly to variable annuity andvariable life insurance separate accounts of Hartford Life Insurance Company and its affiliates (collectively “Hartford Life”) andone or more unaffiliated insurance companies (each, an “Insurance Company” and collectively, the “Insurance Companies”),and to certain qualified employee benefit plans. You may invest indirectly in the Fund through your purchase of a variableannuity or variable life insurance contract issued by a separate account or through a qualified employee benefit plan. Anyminimum or subsequent investment requirements and redemption procedures are governed by the applicable separate accountor plan through which you invest.

TAX INFORMATION. Under current law, qualified employee benefit plan participants and owners of variable annuity and variablelife insurance contracts that have invested in the Fund are not subject to federal income tax on Fund earnings and distributionsor on gains realized upon the sale or redemption of Fund shares until such amounts are withdrawn from the employee benefitplan or variable contract. For information concerning the federal tax consequences to the purchasers of a variable annuity orvariable life insurance contract, see the prospectus or other disclosure document for such variable contract.

40%

2007

5.20%

2008

-37.11%

2009

26.15%

2010

14.73%

2011

1.81%

2012

15.63%

2013

1.06%

13.33% 11.59%

31.95%

201620152014

-50%

-40%

-30%

-20%

-10%

0%

10%

20%

30%

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PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES. The Fund is only available as an underlyinginvestment for certain variable annuity and variable life insurance contracts and qualified employee benefit plans. The Fund andits related companies may make payments to the sponsoring insurance company (or its affiliates) and to broker-dealers andother financial intermediaries for distribution and/or other services. These payments may be a factor that the insurancecompany considers in including the Fund as an underlying investment option in the variable contract. Payments to broker-dealers and other financial intermediaries may create a conflict of interest by influencing the broker-dealer or other financialintermediary to recommend a variable product and/or the Fund over another investment. Ask your financial adviser or visit thewebsite of the insurance company or the financial intermediary for more information. The disclosure document for your variablecontract may contain additional information about these payments.

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ADDITIONAL INFORMATION REGARDING RISKS AND INVESTMENT

STRATEGIESINVESTMENT GOAL. The Fund seeks to provide investment results which approximate the price and yield performance ofpublicly traded common stocks in the aggregate.

PRINCIPAL INVESTMENT STRATEGY. The Fund uses the Standard & Poor’s 500 Index (the “Index”) as its standard performancecomparison because it represents a significant proportion of the total market value of all common stocks, is well known toinvestors and, in the opinion of the Fund’s investment manager, Hartford Investment Management, is representative of theperformance of publicly-traded common stocks. Therefore, the Fund attempts to approximate the capital performance anddividend income of the Index. The Index is comprised of 500 selected companies, most of which are listed on the New YorkStock Exchange. The portfolio managers generally invest in no fewer than 495 companies included in the Index. HartfordInvestment Management selects stocks for the Fund’s portfolio after taking into account their individual weights in the Index.Hartford Investment Management does not attempt to “manage” the Fund’s portfolio in the traditional sense, using economic,financial and market analysis, nor does the adverse financial situation of a company directly result in its elimination from theFund’s portfolio unless, of course, the company is removed from the Index.

Standard & Poor’s Corporation (“S&P”) chooses the stocks to be included in the Index on a proprietary basis. The Index is floatadjusted, meaning that each company’s number of shares in the Index represents the total shares available to investors. Thisindex methodology excludes significant share positions that are closely held by other publicly traded companies, controlgroups, or government agencies. The weightings of stocks in the Index are based on each stock’s relative market valueavailable in the public market, that is, its market price per share times the number of shares outstanding times its investableweight factor. Because of this weighting as of December 31, 2016, approximately 43% of the Index was composed of the fortylargest companies, the five largest being Apple, Microsoft, Exxon Mobil, Johnson & Johnson and Berkshire Hathaway.

From time to time administrative adjustments may be made in the Fund’s portfolio because of mergers, changes in thecomposition of the Index and similar reasons. In addition, the Fund’s ability to approximate the performance of the Indexdepends to some extent on the size of cash flows into and out of the Fund. Investment changes to accommodate these cashflows are made to maintain the similarity of the Fund’s portfolio to the Index, to the maximum practicable extent.

The Fund’s portfolio is broadly diversified by industry and company.

MAIN RISKS. The primary risks of investing in the Fund are described below. When you sell your shares they may be worth moreor less than what you paid for them, which means that you could lose money as a result of your investment. An investment in

the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other

government agency. As with any fund, there is no guarantee that the Fund will achieve its goal.

Equity Securities Risk – Equity securities include common stock, preferred stock, securities convertible into common orpreferred stock and warrants or rights to acquire common stock, including options. Equity markets can be volatile. Stock pricesrise and fall based on changes in an individual company’s financial condition and overall market conditions. Stock prices candecline significantly in response to adverse market conditions, company-specific events and other domestic and internationalpolitical and economic developments.

Market Risk – Market risk is the risk that one or more markets in which the Fund invests will go down in value, includingthe possibility that the markets will go down sharply and unpredictably. Securities may decline in value due to the activities andfinancial prospects of individual companies or to general market and economic movements and trends, including adversechanges to credit markets.

Index Strategy Risk – The Fund is not actively managed, but instead is designed to match the Index. Therefore, theadverse performance of a particular stock ordinarily will not result in the elimination of the stock from the Fund’s portfolio. TheFund will remain invested in stocks even when stock prices are generally falling.

Large Cap Stock Risk – Larger companies may not be able to respond as quickly to competitive challenges or to changesin technology, product or other market conditions. They also may not be able to maintain high growth rates compared tosmaller well-managed companies, particularly during extended periods of economic expansion.

Tracking Error Risk – The Fund’s performance may not match or correlate to that of its reference Index, either on a dailyor aggregate basis. Factors such as cash flows, Fund expenses, imperfect correlation between the Fund’s portfolio and thecomponent securities of the Index, rounding of share prices, asset valuation, timing variances, changes to the composition ofthe Index and regulatory requirements may cause the Fund’s performance to diverge from the performance of the Index.Tracking error risk may cause the Fund’s performance to be less than expected.

The Fund is subject to certain additional risks, which are discussed below.

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Additional Risks and Investment Information.

Many factors affect the Fund’s performance. There is no assurance that the Fund will achieve its investment goal, and youshould not consider any one fund alone to be a complete investment program. The different types of securities, investments,and investment techniques used by the Fund have attendant risks of varying degrees. The Statement of Additional Information(“SAI”) contains more detailed information about the Fund’s investment policies and risks.

Healthcare-Related Securities Risk – Many healthcare-related companies are smaller and less seasoned than companiesin other sectors. Healthcare-related companies may also be strongly affected by scientific or technological developments andtheir products may quickly become obsolete. Many healthcare companies are heavily dependent on patent protection and theactual or perceived safety and efficiency of their products. The expiration of patents may adversely affect the profitability ofthese companies. Many healthcare companies are subject to extensive litigation based on product liability and similar claims,many healthcare-related companies offer products and services that are subject to governmental regulation and may beadversely affected by changes in governmental policies or laws. The Fund cannot predict the long-term impact of the PatientProtection and Affordable Care Act on healthcare-related companies or what healthcare-related proposals might be proposed orenacted in the future.

To Be Announced (TBA) Investments Risk – TBA investments include when-issued and delayed delivery securities andforward commitments. TBA transactions involve the risk that the security the Fund buys will lose value prior to its delivery. TheFund is subject to this risk whether or not the Fund takes delivery of the securities on the settlement date for a transaction.There also is the risk that the security will not be issued or that the other party to the transaction will not meet its obligation. Ifthis occurs, the Fund loses both the investment opportunity for the assets it set aside to pay for the security and any gain inthe security’s price.

Derivatives Risk – The Fund may use derivatives for investment purposes and/or for hedging purposes, includinganticipatory hedges. Derivatives are instruments whose value depends on, or is derived from, the value of an underlying asset,reference rate or index. Successful use of derivative instruments by the Fund depends on the investment manager’s judgmentwith respect to a number of factors and the Fund’s performance could be worse and/or more volatile than if it had not usedthese instruments. Derivatives may involve significant risks, including:

• Counterparty/Credit Risk – the risk that the counterparty (the party on the other side of the transaction) on a derivativetransaction will be unable to honor its financial obligation to the Fund.

• Currency Risk – the risk that changes in the exchange rate between currencies will adversely affect the value (in U.S.dollar terms) of an investment.

• Leverage Risk – the risk associated with certain types of investments or trading strategies that relatively small marketmovements may result in large changes in the value of an investment. Certain investments or trading strategies thatinvolve leverage can result in losses that greatly exceed the amount originally invested.

• Liquidity Risk – the risk that certain investments may be difficult or impossible to sell at the time that the seller wouldlike or at the price that the seller believes the security is currently worth, which could expose the Fund to losses andcould make derivatives more difficult for the Fund to value accurately.

• Index Risk – if the derivative is linked to the performance of an index, it will be subject to the risks associated withchanges in that index. If the index changes, the Fund could receive lower interest payments or experience a reductionin the value of the derivative to below what the Fund paid. Certain indexed securities, including inverse securities(which move in an opposite direction to the index), may create leverage, to the extent that they increase or decrease invalue at a rate that is a multiple of the changes in the applicable index. For this reason, the Fund’s investment inthese instruments may decline significantly in value if index levels move in a way that is not anticipated.

• Regulatory Risk – Government legislation or regulation may make derivatives more costly, may limit the availability ofderivatives, or may otherwise adversely affect the use, value or performance of derivatives.

• Hedging Risk – Hedging is a strategy in which the Fund uses a derivative to offset the risks associated with other Fundholdings. While hedging can reduce losses, it can also reduce or eliminate gains or cause losses if the market movesin a manner different from that anticipated by the Fund or if the cost of the derivative outweighs the benefit of thehedge. Hedging also involves the risk that changes in the value of the derivative will not match those of the holdingsbeing hedged as expected by the Fund, in which case any losses on the holdings being hedged may not be reducedand may be increased. There can be no assurance that the Fund’s hedging strategy will reduce risk or that hedgingtransactions will be either available or cost effective. The Fund is not required to use hedging and may choose not todo so.

Futures and Options Risk – Futures and options may be more volatile than direct investments in the securities underlyingthe futures and options and may not correlate perfectly to the underlying securities. Futures and options also involve additionalexpenses as compared to investing directly in the underlying securities, which could reduce any benefit or increase any loss to

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the Fund from using the strategy. Futures and options also may involve the use of leverage as the Fund may make a smallinitial investment relative to the risk assumed, which could result in losses greater than if futures or options had not beenused. Options transactions may be effected on securities exchanges or in the over-the-counter market. When futures or optionsare purchased over-the-counter, the Fund bears the risk that the counter-party that wrote the future or option will be unable orunwilling to perform its obligations under the contract. Such futures and options may also be illiquid, and in such cases, theFund may have difficulty closing out its position or valuing the contract. Certain major exchanges on which options and futurescontracts are traded, such as the Chicago Mercantile Exchange, have established limits on how much an option or futurescontract may decline over various time periods within a day. If an option or futures contract’s price declines more than theestablished limits, trading on the exchange is halted on that instrument. If a trading halt occurs before the close of a tradingday, the Fund may not be able to purchase or sell options or futures contracts. In such an event, the Fund also may berequired to use a “fair value” method to price its outstanding contracts.

Illiquid Investments Risk – Illiquid investments are investments that the Fund cannot sell within seven days atapproximately current value. The Fund may invest up to 15% of its net assets in such investments. In addition, securities andother investments purchased by the Fund that are liquid at the time of purchase may subsequently become illiquid due toevents relating to the issuer of the securities, market events, economic conditions or investor perceptions. Securities withreduced liquidity or that become illiquid involve greater risk than securities with more liquid markets. Market quotations forilliquid securities may be volatile and/or subject to large spreads between bid and ask prices. If the Fund holds illiquidinvestments it may be unable to quickly sell them or may be able to sell them only at a price below current value. If one ormore of the Fund’s investments becomes illiquid, the Fund may exceed its limit on such investments. In this case, the Fundwill consider appropriate steps to bring the Fund’s holdings back under the limit. In October 2016, the Securities and ExchangeCommission (“SEC”) adopted new regulations that may limit the Fund’s ability to invest in illiquid and less liquid investments.These limitations may adversely affect the Fund’s performance and ability to pursue its investment objective when theregulations are expected to take effect on December 1, 2018.

ETF Risk and ETN Risk – An investment in an exchange traded fund (“ETF”) generally presents the same primary risks asan investment in a fund that is not exchange-traded that has the same investment objectives, strategies and policies as theETF. ETF investments are also subject to the risk that the ETF may fail to accurately track the market segment or index thatunderlies its investment objective; more frequent price fluctuations, resulting in a loss to the Fund; the risk that the ETF maytrade at a price that is lower than its NAV; and the risk that an active market for the ETF’s shares may not develop or bemaintained. ETFs are also subject to specific risks depending on the nature of the ETF, such as liquidity risk, sector risk, andforeign and emerging market risk, as well as risks associated with fixed income securities, real estate investments andcommodities. An investment in an ETF presents the risk that the ETF may no longer meet the listing requirements of anyapplicable exchanges on which the ETF is listed. The Fund will indirectly pay a proportional share of the asset-based fees of theETFs in which the Fund invests.

Exchange traded notes (“ETNs”) are a type of unsecured, unsubordinated debt security that have characteristics and riskssimilar to those of fixed-income securities and trade on a major exchange similar to shares of ETFs. Unlike other types of fixedincome securities, however, the performance of ETNs is based upon that of a market index or other reference asset minusfees and expenses, no coupon payments are made and no principal protection exists. The value of an ETN may be affected bytime to maturity, level of supply and demand for the ETN, volatility and lack of liquidity in underlying commodities or securitiesmarkets, changes in the applicable interest rates, changes in the issuer’s credit rating and economic, legal, political orgeographic events that affect the referenced commodity or security. The Fund’s ability to sell its ETN holdings also may belimited by the availability of a secondary market and the Fund may have to sell such holdings at a discount. ETNs also aresubject to counterparty credit risk, fixed-income risk and tracking error risk (where the ETN’s performance may not match orcorrelate to that of its market index). ETNs also incur certain expenses not incurred by their applicable index.

Use of Cash or Money Market Investments for Temporary Defensive Purposes

The Fund may invest some or all of its assets in cash or high quality money market securities (including money market funds)to maintain sufficient liquidity or for temporary defensive purposes in response to adverse market, economic or politicalconditions. To the extent the Fund is in a defensive position, it may lose the benefit of market upswings and limit its ability tomeet its investment goal.

About The Fund’s Investment Goal

The Fund’s investment goal may be changed by the Fund’s Board of Trustees without approval of the shareholders of the Fund.The Fund’s prospectus will be updated prior to any change in the Fund’s investment goal.

Consequences of Portfolio Trading Practices

The Fund may have a relatively high portfolio turnover and may, at times, engage in short-term trading. Such activity couldproduce higher brokerage expenses and transaction costs for the Fund and, therefore, could adversely affect the Fund’s

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performance. The Fund is not managed to achieve a particular tax result for shareholders. Shareholders should consult theirown tax advisor for individual tax-advice.

Additional Investment Strategies and Risks

The Fund may invest in various securities and engage in various investment techniques that are not the principal focus of theFund and, therefore, are not described in this prospectus. These securities and techniques, together with their risks, arediscussed in the Fund’s Combined SAI, which may be obtained free of charge by contacting the Fund (see back cover foraddress, phone number and website address).

Disclosure of Portfolio Holdings

The Fund will publicly disclose its complete month-end portfolio holdings on the Fund’s website at www.hvitfunds.com no earlierthan 25 calendar days after the end of each month.

The Fund also will publicly disclose on its website its largest ten holdings in which it invests (and the percentage invested ineach) no earlier than 15 days after the end of each month. For purposes of the Top Ten Holdings posted on the Fund’swebsite, the Fund will not include short-term investments or derivative positions.

A description of the Fund’s policies and procedures with respect to the disclosure of the Fund’s portfolio securities is availablein the Fund’s SAI.

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THE INVESTMENT MANAGER

The Investment Manager

Hartford Investment Management serves as the Fund’s investment manager and provides day-to-day management for theFund’s portfolio. Hartford Investment Management is a professional money management firm that provides services toinvestment companies, employee benefit plans, its affiliated insurance companies and other institutional accounts. HartfordInvestment Management is a wholly-owned subsidiary of The Hartford Financial Services Group, Inc. As of December 31, 2016,Hartford Investment Management had investment management authority over approximately $98.3 billion in assets. HartfordInvestment Management is principally located at One Hartford Plaza, Hartford, Connecticut 06155.

Hartford Investment Management and the Fund may rely on an exemptive order from the SEC to operate the Fund under a“Manager of Managers” structure. Under this structure, Hartford Investment Management would have responsibility, subject tooversight by the Board of Trustees, to oversee any sub-adviser and recommend the hiring, termination and replacement of suchsub-adviser(s). The exemptive order permits Hartford Investment Management to appoint a sub-adviser or materially amend asub-advisory agreement with a sub-adviser that is not affiliated with Hartford Investment Management with the approval of theBoard of Trustees and without obtaining approval from the Fund’s shareholders (the “Order”). Within 90 days after hiring anynew sub-adviser, the Fund’s shareholders will receive information about any new sub-advisory relationship.

In addition, Hartford Investment Management and the Fund have applied for a new exemptive order from the SEC (the “NewOrder”), which would expand the relief provided under the Order and would permit Hartford Investment Management, subject tothe approval of the Board of Trustees, to hire or to modify any existing or future sub-advisory agreement with sub-advisers thatare not affiliated with Hartford Investment Management (the “Current Relief”) as well as sub-advisers that are indirect or direct,wholly-owned subsidiaries of Hartford Investment Management or of another company that, indirectly or directly wholly ownsHartford Investment Management (the “Expanded Relief”). As with the Order, the New Order would require the Fund’sshareholders to receive information about any new sub-advisory relationship within 90 days after hiring any new sub-adviser.There can be no guarantee that the SEC will grant the New Order. If granted, the Fund and Hartford Investment Managementwould not be entitled to rely on the Expanded Relief without first obtaining shareholder approval. Until the New Order isapproved by shareholders of the Fund, the Fund and Hartford Investment Management will continue to rely on the CurrentRelief. The Fund currently is directly managed by Hartford Investment Management. If in the future Hartford InvestmentManagement retains a sub-adviser to manage the Fund, it may do so in reliance on and in accordance with the provisions ofthe exemptive order.

Portfolio Managers. The Fund’s SAI provides additional information about the portfolio managers’ compensation, otheraccounts managed by the portfolio managers and the portfolio managers’ ownership of securities in the Fund.

Edward Caputo, CFA, Senior Vice President of Hartford Investment Management and a portfolio manager within the QuantitativeEquities and Asset Allocation team, has served as a portfolio manager for the Index Fund since 2014. Previously, Mr. Caputoserved as a portfolio manager for several fund of funds, including Hartford Investment Management’s Asset Allocationportfolios and 529 Plans. Mr. Caputo was also responsible for the portfolio management and trading of the passively managedequity portfolios. Mr. Caputo joined Hartford Investment Management in 2001 as a Risk Management Analyst in the Corporateand High Yield sectors. Prior to joining the firm, Mr. Caputo was a Securities Control Analyst with TimesSquare CapitalManagement, Inc. Mr. Caputo earned his B.S. in Finance and Accounting from Drexel University and his M.B.A. fromRensselaer Polytechnic Institute.

Paul Bukowski, CFA, Executive Vice President and Head of Quantitative Equities and Asset Allocation of Hartford InvestmentManagement, has served as a portfolio manager for the Index Fund since 2014. Mr. Bukowski joined Hartford InvestmentManagement in 2005. Before joining Hartford Investment Management, he was a senior quantitative analyst at ING and alsohead of research at Callard & Ogden Investment Management. Mr. Bukowski earned a B.A. from the University of Wisconsinand an M.B.A. from the University of Chicago. He is a Fellow of the Casualty Actuarial Society.

Soft Dollar Practices

The investment manager is responsible for the day-to-day portfolio management activities of the Fund, including effectingsecurities transactions. To the extent consistent with Section 28(e) of the Securities Exchange Act of 1934 (the “1934 Act”),the investment manager may obtain “soft dollar” benefits in connection with the execution of transactions for the Fund. Theinvestment manager may cause the Fund to pay a broker-dealer an amount in excess of the amount that another broker-dealerwould have charged for the same transaction, in exchange for “brokerage and research services” (as defined in the 1934 Act).The management fees are not reduced because the investment manager receives these products and services. Theseproducts and services may be of value to the investment manager in advising its clients (including the Fund), although not all ofthese products and services are necessarily useful and of value in managing the Fund. These products and services mayinclude research reports, access to management personnel, financial newsletters and trade journals, seminar and conference

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fees, quantitative analytical software, data services, communication services relating to (or incidental to) the execution,clearing and settlement of securities transactions, post-trade services relating to functions incidental to trade execution, andother products and services that are permitted under Section 28(e), as interpreted by the SEC from time to time. In certaininstances, these products and services may have additional uses that are not related to brokerage or research. For such“mixed use” items, in accordance with SEC guidance, the investment manager will make a reasonable allocation of the cost ofthe item according to its expected use, and will pay for that portion of the item that does not have a brokerage or research-related component out of its own pocket.

Management Fee. The Fund pays a monthly management fee to Hartford Investment Management at the annual rate, based onthe Fund’s average daily NAV, shown below. A discussion regarding the basis for the Board of Trustees’ approval of theinvestment management agreement of the Fund is available in the Fund’s annual report to shareholders for the fiscal yearended December 31, 2016.

The management fee set forth in the Fund’s investment advisory agreement is 0.3000% of the first $2 billion, 0.2000% of thenext $3 billion, 0.1800% of the next $5 billion and 0.1700% in excess of $10 billion annually of the Fund’s average daily netassets.

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FURTHER INFORMATION ON THE FUND

Purchase and Redemption of Fund Shares

The Fund may offer its shares to variable annuity and variable life insurance separate accounts of Hartford Life, its affiliatesand the Insurance Companies (the “Accounts”) as investment options for certain variable annuity contracts and individualvariable life insurance policies, group annuity and group funding agreement contracts and corporate-owned life insurance andother group life insurance policies (collectively, “variable contracts”) issued through the Accounts. The Fund may also offer itsshares to certain qualified employee benefit plans (the “Plans”).

The Fund has authorized two classes of shares: Class IA and Class IB shares. The two classes of shares represent aninvestment in the same fund but are subject to different expenses and have different prices and performance.

Many of the Accounts are registered with the SEC as investment companies. When shares of the Fund are offered asinvestment options for variable contracts issued through such an Account, a separate prospectus describing the particularAccount and contract will accompany this prospectus. When shares of the Fund are offered as investment options for variablecontracts issued through an Account that is not so registered, a separate disclosure document (rather than a prospectus)describing that Account and contract will accompany this prospectus.

Shares of the Fund are sold by HIMCO Distribution Services Company (the “Distributor”) in a continuous offering to theAccounts and the Plans. Net purchase payments under the variable contracts are placed in one or more subaccounts of theAccounts and the assets of each subaccount are invested in the shares of the Fund corresponding to that subaccount. TheAccounts and the Plans purchase and redeem Class IA and Class IB shares of the Fund at NAV without sales or redemptioncharges.

For each day on which the Fund’s NAV is calculated, the Accounts transmit to the Fund any orders to purchase or redeemshares of the Fund based on the net purchase payments, redemption (surrender or withdrawal) requests, and transfer requestsfrom variable contract owners, annuitants and beneficiaries that have been processed by Hartford Life or an InsuranceCompany as of that day. Similarly, the Plans transmit to the Fund any orders to purchase or redeem shares of the Fund basedon the instructions of Plan trustees or participants received by the Plans as of that day. The Accounts and Plans purchase andredeem shares of the Fund at the next NAV per share to be calculated after the related orders are received, although suchpurchases and redemptions may be executed the next morning. Payment for shares redeemed is made within seven days afterreceipt of notice of redemption, except that payments of redemptions may be postponed beyond seven days when permitted byapplicable laws and regulations.

Although it would not normally do so, the Fund has the right to pay the redemption price of shares of the Fund in whole or inpart in portfolio securities constituting the contract owner’s proportionate share of the current assets of the Fund. Whenportfolio securities received in this fashion are sold, a brokerage charge would be incurred. Any such securities would bevalued for the purposes of making such payment at the same value as used in determining NAV. The Fund, however, alwaysredeems shares solely in cash up to the lesser of $250,000 or 1% of the NAV of the Fund during any 90 day period for any oneaccount.

A potential for certain conflicts exists between the interests of variable annuity contract owners and variable life insurancecontract owners invested in the Fund. Likewise, a potential for certain conflicts exists between the interests of owners ofvariable contracts and those of participants in a Plan that invests in the Fund. To the extent that such classes of investors areinvested in the Fund when a conflict of interest arises that might involve the Fund, one or more of such classes of investorscould be disadvantaged. The Fund currently does not foresee any such conflict or disadvantage to owners of variable contractsor Plan participants. Nonetheless, the Fund’s Board of Trustees will monitor the Fund for the existence of any irreconcilablematerial conflicts among or between the interests of various classes of investors. If such a conflict affecting owners of variablecontracts is determined to exist, Hartford Life will, to the extent reasonably practicable, take such action as is necessary toremedy or eliminate the conflict. If such a conflict were to occur, one or more Accounts may be required to withdraw itsinvestment in the Fund or substitute shares of another HVIT Fund for the current Fund. This, in turn, could cause the Fund tosell portfolio securities at a disadvantageous price.

Class IB Shares Distribution Plan

HIMCO Variable Insurance Trust (the “Trust”) has adopted a distribution plan (the “Distribution Plan”) for Class IB shares ofthe Fund pursuant to approval of the Board of Trustees of the Trust in accordance with the requirements of Rule 12b-1 underthe Investment Company Act of 1940 (the “1940 Act”) and the requirements of the applicable market conduct rules of theFinancial Industry Regulatory Authority concerning asset-based sales charges. Pursuant to the Distribution Plan, the Fundcompensates the Distributor from assets attributable to the Class IB shares for services rendered and expenses borne inconnection with activities primarily intended to result in the sale of the Class IB shares. A portion of the amounts received by

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the Distributor may be used to defray various costs incurred or paid by the Distributor in connection with the printing andmailing of Fund prospectuses, statements of additional information, any supplements to those documents and shareholderreports and holding seminars and sales meetings with wholesale and retail sales personnel designed to promote thedistribution of Class IB shares. The Distributor may also use the amounts received to provide compensation to financialintermediaries and third-party broker-dealers for their services in connection with the distribution of Class IB shares.

The Distribution Plan provides that the Fund may pay annually up to 0.25% of the average daily net assets of the Fundattributable to its Class IB shares for activities primarily intended to result in the sale of Class IB shares. Under the terms ofthe Distribution Plan and the principal underwriting agreement, the Fund is authorized to make monthly payments to theDistributor which may be used to pay or reimburse entities, including insurance company affiliates of Hartford InvestmentManagement, providing distribution and shareholder servicing with respect to the Class IB shares for such entities’ fees orexpenses incurred or paid in that regard. All or any portion of this fee may be remitted to dealers who provide distribution orshareholder account services.

The Distribution Plan is of a type known as a “compensation” plan because payments are made for services rendered to theFund with respect to Class IB shares regardless of the level of expenditures by the Distributor. The Distributor has indicatedthat it expects its expenditures may include, without limitation: (a) compensation to and expenses, including overhead andtelephone expenses, of employees of the Distributor engaged in the distribution of the Class IB shares of the Fund; (b) printingand mailing of prospectuses, statements of additional information, and reports for prospective purchasers of variable contractsinvesting indirectly in Class IB shares of the Fund; (c) compensation to financial intermediaries and broker-dealers to pay orreimburse them for their services or expenses in connection with the distribution of variable contracts investing indirectly inClass IB shares of the Fund; (d) expenses relating to the development, preparation, printing, and mailing of Fundadvertisements, sales literature, and other promotional materials describing and/or relating to the Class IB shares of the Fund;(e) expenses of holding seminars and sales meetings designed to promote the distribution of the Class IB shares of the Fund;(f) expenses of obtaining information and providing explanations to variable contract owners regarding Fund investmentobjectives and policies and other information about the Fund, including performance; (g) expenses of training sales personnelregarding the Class IB shares of the Fund; (h) expenses of compensating sales personnel in connection with the allocation ofcash values and premiums of the variable contracts to the Class IB shares of the Fund; (i) expenses of personal servicesand/or maintenance of variable contract accounts with respect to Class IB shares of the Fund attributable to such accounts;and (j) financing any other activity that the Distributor determines is primarily intended to result in the sale of Class IB shares.

The Distributor and its affiliates may pay, out of their own assets, compensation to brokers, financial institutions and otherpersons for the sale and distribution of the Fund’s shares and/or for the servicing of those shares.

Rule 12b-1 fees have the effect of increasing operating expenses of the Fund. Because the fees paid by the Fund under theDistribution Plan are paid out of the Fund’s assets on an on-going basis, over time these fees will increase the cost of avariable contract owner’s or plan participant’s investment and may cost more than alternative types of charges for the samedistribution and investor services.

Determination of Net Asset Value

The NAV is determined for each class of the Fund’s shares as of the close of regular trading on the New York Stock Exchange(the “Exchange”) (normally 4:00 p.m. Eastern Time) (the “NYSE Close”) on each day that the Exchange is open (“ValuationDate”). If the Exchange is closed due to weather or other extraordinary circumstances on a day it would typically be open forbusiness, the Fund may treat such day as a typical business day and accept purchase and redemption orders and calculatethe Fund’s NAV in accordance with applicable law. Consistent with the procedures established by the Trust’s Board ofTrustees, for any day where, due to technical or other issues, trading is halted before the scheduled close of the Exchange,and not as part of a trading halt that is effected on a market-wide basis, the Fund will continue to treat the valuation time asoccurring at 4:00 p.m. Eastern Time. The NAV for each class of shares is determined by dividing the value of the Fund’s netassets attributable to a class of shares by the number of shares outstanding for that class. Information that becomes knownto the Fund after the NAV has been calculated on a particular day will not generally be used to retroactively adjust the NAVdetermined earlier that day.

For purposes of calculating the NAV, portfolio securities and other assets held in the Fund’s portfolio for which market pricesare readily available are valued at market value. Market value is generally determined on the basis of last reported sales pricesor official closing price. If no sales were reported, market value is based on prices obtained from independent pricing services,a quotation reporting system or established market makers. If market prices are not readily available or are deemed unreliable,the Fund will use the fair value of the security or other instrument as determined in good faith under policies and proceduresestablished by and under the supervision of the Trust’s Board of Trustees. Market prices are considered not readily availablewhere there is an absence of current or reliable market-based data (e.g., trade information or broker quotes), including whereevents occur after the close of the relevant market, but prior to the NYSE Close that materially affect the values of the Fund’sportfolio holdings or assets. In addition, market prices are considered not readily available when, due to extraordinary

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circumstances, the exchanges or markets on which the securities or other instruments trade, do not open for trading for theentire day and no other market prices are available. In addition, prices of foreign equities that are principally traded on certainforeign markets will generally be adjusted daily pursuant to a fair value pricing service approved by the Board of Trustees inorder to reflect an adjustment for the factors occurring after the close of certain foreign markets but before the NYSE Close.Securities and other instruments that are primarily traded on foreign markets may trade on days that are not business days ofthe Fund. The value of the foreign securities or other instruments in which the Fund invests may change on days when ashareholder will not be able to purchase or redeem shares of the Fund. Fair value pricing is subjective in nature and the use offair value pricing by the Fund may cause the NAV of its shares to differ significantly from the NAV that would have beencalculated using market prices at the close of the exchange on which a portfolio holding is primarily traded. There can be noassurance that the Fund could obtain the fair value assigned to an investment if the Fund were to sell the investment atapproximately the time at which the Fund determines its NAV.

Fixed income securities, including those with a remaining maturity of less than sixty (60) days, and non-exchange tradedderivatives held by the Fund are valued in accordance with procedures established by the Trust’s Board of Trustees. Suchinvestments are normally valued on the basis of quotes obtained from independent pricing services or brokers and dealers.Prices obtained from independent pricing services use information provided by market makers or estimates of market valuesobtained from yield data relating to investments or securities with similar characteristics. Senior floating rate interestsgenerally trade in over-the-counter (“OTC”) markets and are priced through an independent pricing service utilizing independentmarket quotations from loan dealers or financial institutions. Generally, the Fund may use fair valuation in regard to fixedincome positions when the Fund holds defaulted or distressed investments or investments in a company in which areorganization is pending. If pricing services do not provide a price for short term investments maturing in 60 days or less,such investments are generally valued at amortized cost if their original term to maturity was 60 days or less, or by amortizingtheir value on the 61st day prior to maturity, if the original term exceeded 60 days.

Exchange traded futures, options and options on futures are valued in accordance with procedures established by the Trust’sBoard of Trustees. Such instruments are normally valued on the basis of quotes obtained from independent pricing services.Prices obtained from independent pricing services use most recent settlement prices and/or bid and ask prices for futures;and last sale prices or official closing prices and bid and ask prices for options and options on futures. If pricing services arenot able to provide prices for futures, such instruments will generally be valued at the most recent trade price as of the NYSEClose. If pricing services are not able to provide prices for options and options on futures, such instruments will generally bevalued on the basis of quotes obtained from brokers, dealers or market makers. If the option is out of the money and within30 days of expiration and no bid price is available, the option may be valued at zero. If such instruments do not trade on anexchange, values may be supplied by an independent pricing service using a formula or other objective method that may takeinto consideration the style, direction, expiration, strike price, notional value and volatility or other special adjustments.

Investments valued in currencies other than U.S. dollars are converted to U.S. dollars using exchange rates obtained fromindependent pricing services for calculation of the NAV. As a result, the NAV of the Fund’s shares may be affected by changesin the value of currencies in relation to the U.S. dollar. The value of securities or other instruments traded in markets outsidethe United States or denominated in currencies other than the U.S. dollar may be affected significantly on a day that the NYSEis closed and the market value may change on days when an investor is not able to purchase, redeem or exchange shares ofthe Fund.

Foreign currency contracts represent agreements to exchange currencies on specific future dates at predetermined rates.Foreign currency contracts are valued using foreign currency exchange rates and forward rates as provided by an independentpricing service on the Valuation Date.

Investments in open-end mutual funds are valued at the respective NAV of each open-end mutual fund on the Valuation Date.Such open-end mutual funds may use fair value pricing as disclosed in their prospectuses.

Financial instruments for which prices are not available from an independent pricing service may be valued using marketquotations obtained from one or more dealers that make markets in the respective financial instrument in accordance withprocedures established by the Trust’s Board of Trustees.

For additional information regarding particular types of investments, please see the “Determination of Net Asset Value” sectionof the SAI.

Dividends and Distributions

The Board of Trustees for the Trust has delegated authority to the Fund Treasurer to declare and make payment of dividends,to reduce the frequency with which dividends are declared and paid, and to declare and make payments of long-term capitalgains as permitted or required by law or in order to avoid adverse tax consequences. The current policy for the Fund is to paydividends from net investment income and to make distributions of realized capital gains, if any, at least once per year.

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Dividends and distributions are automatically invested in full or fractional shares at the NAV on the reinvestment date. TheFund reserves the right to change its dividend distribution policy at the discretion of the Board of Trustees.

Frequent Purchases and Redemptions of Fund Shares

HVIT Funds are intended to be long-term investment vehicles and are not designed to provide investors with a means ofspeculating on short-term market movements (market timing). Frequent purchases and redemptions of Fund shares by theFund’s shareholders can disrupt the management of the Fund, negatively affect the Fund’s performance, and increaseexpenses for all of the Fund’s shareholders. In particular, frequent trading (i) can force the Fund’s portfolio manager to holdlarger cash positions than desired instead of fully investing all of the Fund’s assets, which can result in lost investmentopportunities; (ii) can cause unplanned and inopportune portfolio turnover in order to meet redemption requests; and (iii) canincrease broker-dealer commissions and other transaction costs as well as administrative costs for the Fund. Also, somefrequent traders engage in arbitrage strategies, by which these traders seek to exploit pricing anomalies that can occur whenthe Fund invests in securities that are thinly traded (for example some high yield bonds and small capitalization stocks) or aretraded primarily in markets outside of the United States. Frequent traders, and in particular those using arbitrage strategies,can dilute the Fund’s NAV for long-term shareholders.

If you intend to trade frequently or use market-timing investment strategies, you should not invest in the HVIT Funds.

The HVIT Funds are sold directly to variable annuity and variable life insurance separate accounts of Hartford Life andInsurance Companies, and directly to certain IRS-qualified investment plans (“Plans”), such as employer-sponsored employeebenefit plans. While some individual investors participate through Plans, many investors invest through variable contractseparate accounts maintained by Hartford Life, which in turn invest in the HVIT Funds. Other investors participate in the HVITFunds through variable contract separate accounts maintained by the Insurance Companies. The separate accountsmaintained by the Insurance Companies often establish omnibus accounts in the HVIT Funds for their contract or policy holdersthrough which transactions are placed. In most cases, exchange activity among the HVIT Funds occurs on an omnibus basis,which can limit the ability of the HVIT Funds, themselves, to monitor or restrict the trading practices of individual investors.

In addition to these limitations on the ability of the HVIT Funds themselves to monitor and restrict individual trading practices,the varied mechanisms for participation in the HVIT Funds make it difficult for the HVIT Funds to establish and enforce policiesfor excessive trading that are enforceable on the same terms with respect to all direct and indirect investors in the HVIT Funds.Older versions of individual variable annuity contracts and certain group annuity contracts issued by Hartford Life, for example,do not include terms that would expressly permit Hartford Life to impose strict numeric limitations on the number of exchangesthat a contract holder can make during a specified time period or redemption fees on short-term trading activity. Thesecontracts have not recently been sold by Hartford Life, but holders of these contracts remain invested in Hartford Life’sseparate accounts, which in turn invest in the HVIT Funds. As a result, certain accounts may be more susceptible to frequenttrading abuses by shareholders while other accounts may be less susceptible.

The Board of Trustees of the HVIT Funds has adopted policies and procedures with respect to frequent purchases andredemptions of Fund shares by Fund shareholders. It is the HVIT Funds’ policy to discourage investors from trading in a Fund’sshares in an excessive manner that would be harmful to long-term investors. In addition, the portfolio managers are required toreport any cash flow activities in the HVIT Funds that, in the reasonable judgment of the portfolio manager, are reasonablylikely to affect adversely the management or performance of an HVIT Fund. The Fund reserves the right to reject any purchaseorder at any time and for any reason, without prior written notice. The Fund also reserves the right to revoke the exchangeprivileges of any person at any time and for any reason. In making such determinations, the Fund may consider an investor’strading history in any of the HVIT Funds, including the person’s trading history in any accounts under a person’s commonownership or control. No system for prevention and detection of market timing and other abusive trading activities can beexpected to eliminate all such activities.

To the extent possible, trading activity of the HVIT Funds is generally monitored to identify any trades in excess of two“substantive round-trips” by an investor within any 90-day period. A “substantive round-trip” is a purchase of or an exchangeinto an HVIT Fund and a redemption of or an exchange out of the same HVIT Fund in a dollar amount of $10,000 or more pertransaction. If two substantive round-trips are identified in any 90-day period in any particular HVIT Fund, such Fund maysuspend the trader’s exchange and purchase privileges with respect to such Fund for 90 days for a first violation or restrictthem indefinitely for a second violation. These frequent trading limitations do not apply to the following: (1) any transaction notinitiated by a shareholder or their registered representative; (2) transactions that are part of a systematic program; and(3) transactions of $10,000 or less. Moreover, as indicated above, an HVIT’s Fund’s ability to detect or restrict frequenttrading may be limited by the nature of the account through which the HVIT Fund is held and/or the provisions of certainannuity contracts.

In addition to the procedure described above, Hartford Life has developed procedures with respect to restrictions on tradingthat vary by the mechanism for participation in the HVIT Funds. Such procedures generally restrict the number of transferspermitted during each valuation day and/or the number of transfers permitted during a year until transfers must be requested

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by U.S. mail or overnight delivery service. Similarly, the Insurance Companies may also monitor transaction activities in theirseparate accounts pursuant to their own policies designed to restrict excessive trading.

Because the number of transfers or type of restrictions or procedures may vary, individual contract/policy holders and planparticipants may be subject to different procedures and any individual should not expect that other individuals are subject tothe same procedures or restrictions. For a description of Hartford Life’s or the Insurance Companies’ procedures applicable toyou, please review the prospectus or disclosure document and other documentation associated with your product, policy orplan.

The use of fair value pricing can serve both to make the HVIT Funds less attractive to market timers and to reduce the potentialadverse consequences to other investors of market timing or abusive trading. Certain market timers may seek to takeadvantage of pricing anomalies that can occur in Fund shares resulting from the manner in which the NAV of the Funds’ sharesis determined each day. Frequent trading in Fund shares can dilute the value of long-term shareholders’ interests in an HVITFund if the HVIT Fund calculates its NAV using closing prices that are no longer accurate. Funds that invest in overseasmarkets or that invest in securities of smaller issuers or thinly traded securities are more susceptible to this activity. The HVITFunds’ pricing procedures, particularly those procedures governing the determination of the “fair value” of securities for whichmarket prices are not readily available (or are unreliable) for foreign securities may serve as a deterrent against harmfulexcessive trading in HVIT Fund shares. For additional information concerning the HVIT Funds’ fair-value procedures, pleaserefer to “Determination of Net Asset Value” found earlier in the prospectus.

Federal Income Taxes

For federal income tax purposes, the Fund is treated as a separate taxpayer. The Fund intends to qualify each year as a“regulated investment company” under the Internal Revenue Code of 1986, as amended. By so qualifying, the Fund is notsubject to federal income tax to the extent that its net investment income and net realized capital gains are distributed to theAccounts or Plans. Further, the Fund intends to meet certain diversification requirements applicable to mutual funds underlyingvariable contracts.

Under current law, Plan participants and owners of variable contracts that have invested in the Fund are not subject to federalincome tax on Fund earnings and distributions or on gains realized upon the sale or redemption of Fund shares until suchamounts are withdrawn from the plan or contracts. For information concerning the federal tax consequences to the purchasersof the variable contracts, see the prospectus or other disclosure document for such contract.

For more information about the tax status of the Fund, see “Taxes” in the SAI.

Variable Contract Owner Voting Rights

With regard to HVIT Fund matters for which the 1940 Act requires a shareholder vote, shares held by the Accounts aregenerally voted in accordance with instructions received from the owners of variable contracts (or annuitants or beneficiariesthereunder) having a voting interest in that Account. Each share has one vote. Votes are counted on an aggregate basis for theTrust, except as to matters where the interests of the separate series differ (such as approval of an investment managementagreement or a change in an HVIT Fund’s fundamental investment policies). In such cases, the voting is on a fund-by-fundbasis. Matters that affect only one class of shares of an HVIT Fund (such as approval of a plan of distribution) are voted onseparately for that class by the holders of shares of that class of the HVIT Fund. Fractional shares are counted. Shares held byan Account for which no instructions are received are generally voted for or against, or in abstention, with respect to anyproposals in the same proportion as the shares for which instructions are received. As a result of proportional voting, the voteof a small number of shareholders may determine the outcome of a proposal subject to shareholder vote.

Plan Participant Voting Rights

With regard to HVIT Fund matters for which the 1940 Act requires a shareholder vote, Plan trustees generally vote HVIT Fundshares held by their Plans either in their own discretion or in accordance with instructions from Plan participants.

Performance Related Information

The Fund may advertise performance related information. Performance information about the Fund is based on the Fund’s pastperformance only and is no indication of future performance.

The Fund may include its total return in advertisements or other sales material. When the Fund advertises its total return, it willusually be calculated for one year, five years, and ten years or some other relevant period if the Fund has not been in existencefor at least ten years. Total return is measured by comparing the value of an investment in the Fund at the beginning of therelevant period to the value of the investment at the end of the period (assuming immediate reinvestment of any dividends orcapital gains distributions).

The Fund is offered exclusively through variable insurance products and to certain qualified employee benefit plans.Performance information presented for the Fund should not be compared directly with performance information of other

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insurance products or plans without taking into account charges and expenses payable with respect to these insuranceproducts or plans. Such charges and expenses are not reflected in the Fund’s performance information and will reduce aninvestor’s return under the insurance products or plans.

Distributor, Custodian, Administrator and Transfer Agent

HIMCO Distribution Services Company, One Hartford Plaza, Hartford, CT 06155, serves as distributor to the Fund.

State Street Bank and Trust Company, One Lincoln Street Boston, MA 02111, serves as custodian of the Fund’s assets,administrator and transfer and dividend disbursing agent for the Fund.

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LEGAL PROCEEDINGS

On June 2, 2011, a complaint was filed against Hartford Investment Management in the U.S. District Court of Connecticut(Deutsche Bank Trust Company Americas v. Aetna, Inc., ING Investment Trust Co., Milan E. Chilla, Hartford InvestmentManagement Co., and UBS AG (D. Conn.)). In a similar action, plaintiffs filed a complaint listing The Hartford Index HLS Fund,which was merged into HIMCO VIT Index Fund in October, 2014, as members of the defendant class (The Official Committee ofUnsecured Creditors of Tribune Company v. Fitzsimons, et al. (Bankr. D. Del.)). The complaints relate to the bankruptcy of theTribune Company, which was a public company that repurchased its shares in a leveraged buyout in 2007, but enteredbankruptcy a year later. The plaintiffs in each case allege that the repurchase of shares acted as a fraudulent transfer. Theplaintiffs in each case seek to recover from each class member the amount of consideration received in the buyout. TheHartford Index HLS Fund held 23,987 shares and received $815,558 in the buyout. The Hartford Index HLS Fund is listed as amember of the defendant shareholder class in an exhibit to the Complaint. Each action was transferred to the United StatesDistrict Court for the Southern District of New York. In September 2013, the court dismissed the Deutsche Bank TrustCompany Americas action, and this dismissal was affirmed in March 2016 by the U.S. Court of Appeals for the Second Circuit.The plaintiff in the Deutsche Bank Trust Company Americas action has filed a petition for writ of certiorari, which is pendingbefore the U.S. Supreme Court. In The Official Committee of Unsecured Creditors of Tribune Company action, the court inJanuary 2017 granted the motion to dismiss filed in 2014 by the shareholder defendants. As a result, the shareholderdefendants, including The Hartford Index HLS Fund, have all now been dismissed from the case. Because other non-shareholder defendants remain in the lawsuit, the dismissal order is not immediately appealable by the plaintiff, but aneventual appeal is expected. The Hartford, on behalf of the Fund, intends to continue to vigorously defend these actions.

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PERFORMANCE NOTES

The following notes supplement the performance table in the Summary Section and provide additional information forunderstanding the returns provided in the table.

The Fund is the successor to the Predecessor Fund as a result of the reorganization of the Predecessor Fund into the Fund onOctober 20, 2014. Accordingly, the performance information shown in the table for periods prior to October 20, 2014 is that ofthe Predecessor Fund. Hartford Investment Management served as the sub-adviser to the Predecessor Fund and thePredecessor Fund had the same investment objective and strategies as the Fund.

Index:

The Index is unmanaged, and its results include reinvested dividends and/or distributions, but do not reflect the effect of salescharges, commissions, expenses or taxes.

The S&P 500 Index is a market capitalization-weighted index designed to measure market results for large-capitalization UnitedStates equities.*

* The S&P 500 Index is a product of S&P Dow Jones Indices LLC (“SPDJI”), and has been licensed for use by HIMCO VariableInsurance Trust. Standard & Poor’s®, S&P® and S&P 500® are registered trademarks of Standard & Poor’s Financial ServicesLLC (“S&P”); Dow Jones® is a registered trademark of Dow Jones Trademark Holdings LLC (“Dow Jones”); and thesetrademarks have been licensed for use by SPDJI and sublicensed for certain purposes by HIMCO Variable Insurance Trust. TheFund are not sponsored, endorsed, sold or promoted by SPDJI, Dow Jones, S&P, any of their respective affiliates (collectively,“S&P Dow Jones Indices”). S&P Dow Jones Indices makes no representation or warranty, express or implied, to the owners ofthe Fund or any member of the public regarding the advisability of investing in securities generally or in the Fund particularly orthe ability of the S&P 500 Index to track general market performance. S&P Dow Jones Indices’ only relationship to HIMCOVariable Insurance Trust with respect to the S&P 500 Index is the licensing of the Index and certain trademarks, service marksand/or trade names of S&P Dow Jones Indices or its licensors. The S&P 500 Index is determined, composed and calculated byS&P Dow Jones Indices without regard to HIMCO Variable Insurance Trust or the Fund. S&P Dow Jones Indices have noobligation to take the needs of HIMCO Variable Insurance Trust or the owners of the Fund into consideration in determining,composing or calculating the S&P 500 Index. S&P Dow Jones Indices is not responsible for and has not participated in thedetermination of the prices, and amount of the Fund or the timing of the issuance or sale of the Fund or in the determination orcalculation of the equation by which the Fund is to be converted into cash, surrendered or redeemed, as the case may be. S&PDow Jones Indices has no obligation or liability in connection with the administration, marketing or trading of the Fund. There isno assurance that investment products based on the S&P 500 Index will accurately track index performance or provide positiveinvestment returns. S&P Dow Jones Indices LLC is not an investment advisor. Inclusion of a security within an index is not arecommendation by S&P Dow Jones Indices to buy, sell, or hold such security, nor is it considered to be investment advice.Notwithstanding the foregoing, CME Group Inc. and its affiliates may independently issue and/or sponsor financial productsunrelated to the Fund currently being issued by HIMCO Variable Insurance Trust, but which may be similar to and competitivewith the Fund. In addition, CME Group Inc. and its affiliates may trade financial products which are linked to the performance ofthe S&P 500 Index.

S&P DOW JONES INDICES DOES NOT GUARANTEE THE ADEQUACY, ACCURACY, TIMELINESS AND/OR THE COMPLETENESS OFTHE S&P 500 INDEX OR ANY DATA RELATED THERETO OR ANY COMMUNICATION, INCLUDING BUT NOT LIMITED TO, ORAL ORWRITTEN COMMUNICATION (INCLUDING ELECTRONIC COMMUNICATIONS) WITH RESPECT THERETO. S&P DOW JONES INDICESSHALL NOT BE SUBJECT TO ANY DAMAGES OR LIABILITY FOR ANY ERRORS, OMISSIONS, OR DELAYS THEREIN. S&P DOWJONES INDICES MAKES NO EXPRESS OR IMPLIED WARRANTIES, AND EXPRESSLY DISCLAIMS ALL WARRANTIES, OFMERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE OR AS TO RESULTS TO BE OBTAINED BY HIMCOVARIABLE INSURANCE TRUST, OWNERS OF THE FUND, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE S&P 500INDEX OR WITH RESPECT TO ANY DATA RELATED THERETO. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENTWHATSOEVER SHALL S&P DOW JONES INDICES BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, ORCONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO, LOSS OF PROFITS, TRADING LOSSES, LOST TIME ORGOODWILL, EVEN IF THEY HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, WHETHER IN CONTRACT, TORT,STRICT LIABILITY, OR OTHERWISE. THERE ARE NO THIRD PARTY BENEFICIARIES OF ANY AGREEMENTS OR ARRANGEMENTSBETWEEN S&P DOW JONES INDICES AND HIMCO VARIABLE INSURANCE TRUST, OTHER THAN THE LICENSORS OF S&P DOWJONES INDICES.

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FINANCIAL HIGHLIGHTS

The financial highlights table for the Fund is intended to help you understand the Fund’s financial performance for the past fiveyears. Certain information reflects financial results for a single Fund share. The financial information presented for each periodprior to October 20, 2014 is that of the Predecessor Fund. The Fund is the accounting successor to the Predecessor Fund as aresult of the reorganization of the Predecessor Fund into the Fund on October 20, 2014. The Fund has adopted the FinancialStatements of the Predecessor Fund. The total returns in the table for the Fund represent the rate that an investor would haveearned, or lost, on an investment in the Fund (assuming reinvestment of all dividends and distributions). The information forthe fiscal years ended December 31, 2014, December 31, 2015, and December 31, 2016 has been derived from the financialstatements audited by Deloitte & Touche LLP, the Fund’s independent registered public accounting firm, whose report, alongwith the Fund’s financial statements and financial highlights, is included in the Fund’s annual report, which is available uponrequest. The information for the fiscal years ended December 31, 2012 and December 31, 2013 has been derived fromfinancial statements audited by the Predecessor Fund’s independent registered public accounting firm. These figures do notinclude the effect of sales charges or other fees which may be applied at the variable life insurance or variable annuity productlevel or qualified employee benefit plan level. If additional charges or other fees applied at the variable product or plan level, ifany, were included, returns would be lower.

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HIMCO VIT Index Fund

Financial Highlights

Class IA

Year Ended December 31,2016a 2015a 2014a 2013a 2012

FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIODNet asset value, beginning of period $ 40.92 $ 41.11 $ 38.54 $ 29.69 $ 26.20Investment Operations:Net investment income (loss) 0.79 0.79 0.69 0.62 0.61Net realized and unrealized gain (loss) on

investments 3.82 (0.34) 4.23 8.85 3.48Total from investment operations 4.61 0.45 4.92 9.47 4.09Distributions:Net investment income (0.91) (0.15) (0.58) (0.62) (0.60)Net realized gain on investments (3.04) (0.49) (1.77) — —Total distributions (3.95) (0.64) (2.35) (0.62) (0.60)Net asset value, end of period $ 41.58 $ 40.92 $ 41.11 $ 38.54 $ 29.69Total Returnb 11.59% 1.06% 13.33% 31.95% 15.63%Net assets at end of period (in thousands) $677,208 $680,974 $760,768 $763,868 $691,786Ratios/Supplemental Data:Ratio of expenses to average net assets before

waivers and reimbursements and including expenses not subject to the cap 0.38% 0.42% 0.33% 0.33% 0.33%

Ratio of expenses to average net assets after waivers and reimbursements and including expenses not subject to the cap 0.33% 0.33% 0.33% 0.33% 0.33%

Ratio of net investment income to average net assets 1.93% 1.92% 1.74% 1.79% 1.98%

Portfolio turnover ratec 12% 8% 3% 3% 7%

a Per share amounts have been calculated using average shares outstanding method.b The figures do not include sales charges or other fees which may be applied at the variable life insurance, variable annuity or qualified

retirement plan product level. Any such additional sales charges or other fees would lower the Fund’s performance.c Portfolio turnover rate is calculated on the basis of the Fund as a whole without distinguishing between the classes of shares issued.

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HIMCO VIT Index Fund

Financial Highlights

Class IB

Year Ended December 31,2016a 2015a 2014a 2013a 2012

FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIODNet asset value, beginning of period $ 40.57 $ 40.86 $ 38.35 $ 29.56 $ 26.09Investment Operations:Net investment income (loss) 0.68 0.69 0.59 0.53 0.49Net realized and unrealized gain (loss) on

investments 3.79 (0.34) 4.19 8.80 3.51Total from investment operations 4.47 0.35 4.78 9.33 4.00Distributions:Net investment income (0.91) (0.15) (0.50) (0.54) (0.53)Net realized gain on investments (3.04) (0.49) (1.77) — —Total distributions (3.95) (0.64) (2.27) (0.54) (0.53)Net asset value, end of period $ 41.09 $ 40.57 $ 40.86 $ 38.35 $ 29.56Total Returnb 11.34% 0.82% 13.01% 31.61% 15.34%Net assets at end of period (in thousands) $381,418 $414,950 $467,467 $413,119 $307,129Ratios/Supplemental Data:Ratio of expenses to average net assets before

waivers and reimbursements and including expenses not subject to the cap 0.63% 0.67% 0.58% 0.58% 0.58%

Ratio of expenses to average net assets after waivers and reimbursements and including expenses not subject to the cap 0.58% 0.58% 0.58% 0.58% 0.58%

Ratio of net investment income to average net assets 1.68% 1.67% 1.49% 1.54% 1.75%

Portfolio turnover ratec 12% 8% 3% 3% 7%

a Per share amounts have been calculated using average shares outstanding method.b The figures do not include sales charges or other fees which may be applied at the variable life insurance, variable annuity or qualified

retirement plan product level. Any such additional sales charges or other fees would lower the Fund’s performance.c Portfolio turnover rate is calculated on the basis of the Fund as a whole without distinguishing between the classes of shares issued.

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FOR MORE INFORMATION

Two documents are available that offer further information on the Fund:

Annual/Semi-Annual Report To Shareholders

Additional information about the Fund is contained in the financial statements and portfolio holdings in the Fund’s annual andsemi-annual reports. In the Fund’s annual report you will also find a discussion of the market conditions and investmentstrategies that significantly affected the Fund’s performance during the last fiscal year, as well as the independent registeredpublic accounting firm’s report.

Statement of Additional Information (SAI)

The SAI contains more detailed information on the Fund.

A current SAI and annual report have been filed with the SEC and the SAI and the financial statements from the annual reportare incorporated by reference into (which means they are legally a part of) this prospectus.

The Fund makes available this prospectus, its SAI and annual/semi-annual reports free of charge, on the Fund’s website atwww.hvitfunds.com.

To request a free copy of the current annual/semi-annual report for the Fund and/or the SAI or for shareholder inquiries orother information about the Fund, please contact the Fund at:

By Mail:

HVIT FundsOne Hartford Plaza – NP5-BHartford, CT 06155

On the Internet or by E-Mail:

Internet: www.hvitfunds.com

E-Mail: hvitfunds@himco.com

By Phone:

1-800-862-6668

In Person:

At the SEC Public Reference Room in Washington, DC.

Information on the operation of the SEC Public Reference Room may be obtained by calling 1-202-551-8090.

By Mail:

Public Reference SectionSecurities and Exchange CommissionWashington, DC 20549-1520

Requests which are made by mail require the payment of a duplicating fee to the SEC in order to obtain a document.

On the Internet or by E-Mail:

Internet: (on the EDGAR Database on the SEC’s internet website) www.sec.gov

E-Mail: publicinfo@sec.gov

Requests which are made by e-mail require the payment of a duplicating fee to the SEC in order to obtain a document.

SEC File Number:HIMCO Variable Insurance Trust 811-22954 HVIT PRO IX 4-2017 April 30, 2017

HV-HIM-012.17.01 H150