Pricing of Shares

T he Large Cap Growth Fund and the Large Cap Value Fund each offer six classes of shares and the Large Cap Core Fund offers five classes of shares. Each class of shares has its own sales charge and expense structure, allowing you to invest in the way that best suits your needs. Each share class represents an ownership interest in the same investment portfolio. When you choose your class of shares you should consider the size of your investment and how long you plan to hold your shares. Your financial adviser or other financial intermediary can help you determine which share class is best suited to your personal financial goals.

For example, if you select Institutional shares, you will not pay any sales charge. However, only certain investors may buy Institutional shares. If you select Investor A shares, you generally pay a sales charge at the time of purchase and an ongoing account maintenance fee of 0.25% per year. You may be eligible for a sales charge reduction or waiver.

Certain financial intermediaries that make Fund shares available to their customers may charge fees in addition to those described in this Prospectus for providing certain services, including: marketing, distribution or other services intended to assist in the offer and sale of Fund shares; shareholder servicing activities; and/or sub-transfer agency services provided to individual shareholders or beneficial owners where a financial intermediary maintains omnibus accounts with a Fund’s transfer agent. The Investment Adviser, the Distributors or their affiliates may pay all or a portion of those fees out of their own resources. The amount of fees paid to a financial intermediary in any given year will vary and may be based on one or more factors, including a fixed amount, a fixed percentage rate, a financial intermediary’s sales of Fund shares, assets in Fund shares held by the intermediary’s customers, or other factors. In addition, consistent with applicable regulations, the Distributors or their affiliates may from time to time pay for or make contributions to financial intermediaries or their employees in connection with various activities including: training and education seminars for financial intermediary employees, clients and potential clients; due diligence meetings regarding a Fund; recreational activities; gifts; and/or other non-cash items. See the Statement of Additional Information for more information.

If you select Investor B, Investor C or Class R shares, you will invest the full amount of your purchase price but will be subject to a distribution fee of 0.75% per year for Investor B shares, 0.75% per year for Investor C shares, and 0.25% per year for Class R shares and an account maintenance fee of 0.25% per year for all three classes of shares. Because these fees are paid out of a Fund’s assets on an ongoing basis, over time these fees increase the cost of your investment and may cost you more

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than paying other types of sales charges. In addition, you may be subject to a deferred sales charge when you sell Investor B or Investor C shares.

On September 29, 2006, BlackRock, Inc. and Merrill Lynch & Co., Inc. created a new BlackRock, Inc., a new independent asset management company. See “Management of the Fund.” In connection with this transaction, Merrill Lynch Large Cap Series Funds, Inc. was renamed “BlackRock Large Cap Series Funds, Inc.” These transactions are together referred to as the “Transactions.” In connection with the Transactions, existing shareholders of the Funds as of the date of this Prospectus hold shares as described in the following chart:

Each Fund’s shares are distributed by FAM Distributors, Inc. and BlackRock Distributors, Inc., each an affiliate of the Investment Adviser.

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The table below summarizes key features of each of the Funds’ share classes.

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Institutional Shares

Institutional shares are not subject to any sales charge. Only certain investors are eligible to buy Institutional shares. Your financial adviser or other financial intermediary can help you determine whether you are eligible to buy Institutional shares.

Eligible Institutional investors include the following:

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IMPORTANT DEFINITIONS

Right of Accumulation  —permits you to pay the sales charge that would apply to the current net asset value of all qualifying Investor class and Institutional shares taken together that you own in BlackRock Funds.

Letter of Intent  — permits you to pay the sales charge that would apply if you add up all qualifying Investor class and Institutional shares of BlackRock Funds that you agree to buy within a 13 month period. Certain restrictions apply.

The table above shows the reduced sales charges for which you may qualify when you purchase Investor A shares of a Fund. You may qualify for these reductions through a single purchase or under a right of accumulation or letter of intent . These reductions will apply to the value of all qualifying holdings in shares of a Fund or other mutual funds advised by the Investment Adviser or its affiliates (“BlackRock Funds”) owned by you, your spouse and/or your children under the age of twenty one and by a single trustee of a single trust estate or a single fiduciary. For this purpose, the value of your holdings means the offering price of the newly purchased shares (including any applicable sales charge) plus the higher of the current net asset value or original cost (including any sales charges paid) of all shares you already hold taken together. For purposes of the right of accumulation, you may not combine with your other holdings shares held in pension, profit sharing or other employee benefit plans if those shares are held in the name of a nominee or custodian.

In order to receive a reduced sales charge, at the time you purchase shares of a Fund or any other BlackRock Fund, you should inform your financial adviser or other financial intermediary or the Transfer Agent of any other shares of the Fund or any other BlackRock Fund owned by you, your spouse and/or your children under the age of twenty one. These may include shares held in accounts held at a selected securities dealer, or

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another broker-dealer or other financial intermediary, including personal accounts, certain retirement accounts, employee benefit plan accounts, UGMA/UTMA accounts, Joint Tenancy accounts, trust accounts and Transfer on Death accounts, as well as shares purchased by a trust of which you are a beneficiary. Your financial adviser or other financial intermediary may request documentation — including account statements and records of the original cost of the shares owned by you, your spouse and/or your children under the age of twenty one — from you to show that you qualify for a reduced sales charge. You should retain these records because — depending on where an account is held or the type of account — a Fund, its Transfer Agent, and/or your financial adviser or other financial intermediary may not be able to maintain this information. If you do not notify your financial adviser or other financial intermediary, or the BlackRock Funds, you may not receive the sales charge reduction to which you are otherwise entitled.

No initial sales charge applies to Investor A shares that you buy through reinvestment of dividends or capital gains.

A sales charge waiver on a purchase of Investor A shares may also apply for:

More information about existing sales charge reductions and waivers is available free of charge in a clear and prominent format via hyperlink at www.blackrock.com and in the Statement of Additional Information, which is available on request.

If you are eligible to buy both Investor A and Institutional shares, you should buy Institutional shares since Investor A shares are subject to a front end sales charge and an annual 0.25% account maintenance fee, while Institutional shares are not. The Distributors normally pay the

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annual Investor A account maintenance fee to dealers as a service fee on a monthly basis.

If you redeem any class of shares (other than Class R) and, within 60 days, buy new Investor A shares of the same Fund, you will not pay a sales charge on the new purchase amount. The amount eligible for this “Reinstatement Privilege” may not exceed the amount of your redemption proceeds and you may only exercise this privilege once in any twelve month period. To exercise the privilege, contact your financial adviser, selected securities dealer, other financial intermediary or the Funds’ Transfer Agent in writing at the address listed in on the back cover of this Prospectus.

Investor B and Investor C Shares — Deferred Sales Charge Options

If you select Investor B or Investor C shares, you do not pay an initial sales charge at the time of purchase. However, if you redeem your Investor B shares within six years after purchase, or Investor C shares within one year after purchase, you may be required to pay a deferred sales charge. You will also pay distribution fees of 0.75% and account maintenance fees of 0.25% for both classes of shares each year under distribution plans that each Fund has adopted under Rule 12b-1. Because these fees are paid out of the Funds’ assets on an ongoing basis, over time these fees increase the cost of your investment and may cost you more than paying other types of sales charges. Each Distributor uses the money that it receives from the deferred sales charge and the distribution fees to cover the costs of marketing, advertising and compensating the financial adviser, selected securities dealer or other financial intermediary who assists you in purchasing Fund shares.

No deferred sales charge applies to shares that you buy through reinvestment of dividends or capital gains.

Each Distributor currently pays a sales concession of 4.00% of the purchase price of Investor B shares to dealers from its own resources at the time of sale. Each Distributor also normally pays the annual Investor B shares account maintenance fee to dealers as a service fee on a monthly basis. Each Distributor normally retains the Investor B shares distribution fee.

Each Distributor currently pays dealers a sales concession of 1.00% of the purchase price of Investor C shares from its own resources at the time of sale. Each Distributor pays the annual Investor C shares distribution fee and the annual Investor C shares account maintenance fee as an ongoing concession and as a service fee, respectively, to dealers for Investor C shares held for over a year and normally retains the Investor C distribution fee and account maintenance fee during the first year after purchase. Under certain circumstances, a Distributor will pay the full Investor C shares distribution fee and account maintenance fee to dealers beginning in the first year after purchase in lieu of paying the sales concession.

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Your Investor B shares convert automatically into Investor A shares approximately eight years after purchase. Any Investor B shares received through reinvestment of dividends paid on converting shares will convert pro rata based on the amount of shares being converted. Investor A shares are subject to lower annual expenses than Investor B shares. The conversion of Investor B shares to Investor A shares is not a taxable event for Federal income tax purposes.

Different conversion schedules apply to Investor B shares of different BlackRock Funds. For example, Investor B shares of a fixed income fund typically convert approximately ten years after purchase compared to approximately eight years for equity funds. If you acquire your Investor B shares in an exchange from another fund with a different conversion schedule, the conversion schedule that applies to the shares you acquire in the exchange will apply. The length of time that you hold both the original and exchanged Investor B shares in both funds will count toward the conversion schedule. The conversion schedule may be modified in certain other cases as well.

Investor C Shares

If you redeem Investor C shares within one year after purchase, you may be charged a deferred sales charge of 1.00%. The charge will apply to the lesser of the original cost of the shares being redeemed or the proceeds of your redemption. You will not be charged a deferred sales charge when you redeem shares that you acquire through reinvestment of Fund dividends.

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Investor C shares do not offer a conversion privilege.

Contingent Deferred Sales Charge Waivers

The deferred sales charge relating to Investor B or Investor C shares may be reduced or waived in certain circumstances, such as:

Class R Shares

Class R shares are available only to certain retirement plans. If you buy Class R shares, you will pay neither an initial sales charge nor a contingent deferred sales charge. However, Class R shares are subject to a distribution fee of 0.25% per year and an account maintenance fee of 0.25% per year. Because these fees are paid out of the Funds’ assets on an ongoing basis, over time these fees increase the cost of your investment and may cost you more than paying other types of sales charges. Class R shares do not offer a conversion privilege.

Each Distributor normally pays the annual Class R shares distribution fee and annual Class R shares account maintenance fee to dealers as an ongoing concession and as a service fee, respectively, on a monthly basis.

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Service Shares (Large Cap Growth Fund and Large Cap Value Fund only)

Only certain investors are eligible to buy Service shares. Your financial adviser or other financial intermediary can help you determine whether you are eligible to buy Service shares.

Eligible Service investors include the following:

Service shares are normally purchased through a customer’s account at an institution through procedures established by the institution. In these cases, confirmation of share purchases and redemptions will be sent to the institutions. A customer’s ownership of shares will be recorded by the institution and reflected in the account statements provided by the institutions to their customers. Investors wishing to purchase Service shares should contact their institutions. Purchase order may be placed by calling (800) 441-7762.

Service shares are subject to an account maintenance fee of 0.25% per year. Service shares do not offer a conversion privilege. Service shares are not available for Large Cap Core Fund. The Distributors normally pay the annual Service share account maintenance fee to brokers, dealers, financial institutions and industry professionals (including BlackRock, PNC Bank and their affiliates) as a service fee on a monthly basis.

How To Buy, Sell, Transfer and Exchange Shares

T he chart on the following pages summarizes how to buy, sell, transfer and exchange shares through your financial adviser, a selected securities dealer, broker, investment adviser, service provider or other financial intermediary. You may also buy, sell, transfer and exchange shares through the Transfer Agent. To learn more about buying, selling, transferring or exchanging shares through the Transfer Agent, call (800) 441-7762. Because the selection of a mutual fund involves many considerations, your financial adviser may help you with this decision.

Because of the high costs of maintaining smaller shareholder accounts, a Fund may redeem the shares in your account (without charging any deferred sales charge) if the net asset value of your account falls below $500 (or, for Service shares, $5,000) due to redemptions you have made. You will be notified that the value of your account is less than $500 (or, for Service shares, $5,000) before a Fund makes an involuntary redemption. You will then have 60 days to make an additional investment to bring the value of your account to at least $500 (or, for Service shares, $5,000) before the Fund takes any action. This involuntary redemption does not apply to retirement plans or Uniform Gifts or Transfers to Minors Act accounts.

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Short-Term Trading

Each Fund reserves the right to reject any purchase order, including exchanges. Short-term or excessive trading (sometimes known as “market timing”) into and out of a Fund, particularly in larger amounts, may harm performance by disrupting portfolio management strategies and by increasing expenses, including brokerage and administrative costs, and may also dilute the value of the holdings of other shareholders of the Fund. Short-term or excessive trading may cause a Fund to retain more cash than the portfolio manager would normally retain in order to meet unanticipated redemptions or may force a Fund to sell portfolio securities at disadvantageous times to raise the cash needed to meet those redemption or exchange requests. Accordingly, each Fund has adopted certain policies and procedures, which have been reviewed and approved by the Corporation’s Board of Directors, designed to deter such short-term or excessive trading. Shareholders may not exchange their shares of a Fund for shares of another mutual fund advised by the Investment Adviser or its affiliates unless they have held the shares to be used in the exchange for at least fifteen days. Each Fund will reject purchase orders from investors who have previously purchased and sold shares of the Fund within a fifteen day period. In addition, each Fund will reject purchase orders, including exchanges that fall both within and outside the fifteen day holding period, from market timers or other investors if Fund management, in its discretion, has determined that such orders are short-term or excessive, and will be disruptive to the Fund. For these purposes, Fund management considers an investor’s trading history in the Fund or other funds advised by the Investment Adviser or its affiliates, and accounts under common ownership or control. Each Distributor has entered into agreements with respect to financial advisers and other financial intermediaries that maintain omnibus accounts with the Funds’ Transfer Agent pursuant to which such financial advisers and other financial intermediaries undertake to cooperate with the Distributors in monitoring purchase, exchange and redemption orders by their customers in order to detect and prevent short-term or excessive trading in a Fund’s shares through such accounts.

Each Fund applies these policies to all shareholders. However, Fund management may not be able to determine that a specific order, particularly with respect to orders made through omnibus accounts or 401(k) plans, is short-term or excessive, and will be disruptive to a Fund and so makes no representation that all such orders can or will be rejected.

Anti-Money Laundering Requirements

Each Fund is subject to the USA Patriot Act (the “Patriot Act”). The Patriot Act is intended to prevent the use of the U.S. financial system in furtherance of money laundering, terrorism or other illicit activities. Pursuant to requirements under the Patriot Act, each Fund may request information from shareholders to enable it to form a reasonable belief that it knows the true identity of its shareholders. This information will be used to verify the identity of investors or, in some cases, the status of

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IMPORTANT DEFINITIONS

Net Asset Value  — the market value of a Fund’s total assets after deducting liabilities, divided by the number of shares outstanding.

financial advisers; it will be used only for compliance with the requirements of the Patriot Act. Each Fund reserves the right to reject purchase orders from persons who have not submitted information sufficient to allow the Fund to verify their identity. Each Fund also reserves the right to redeem any amounts in the Fund from persons whose identity it is unable to verify on a timely basis. It is each Fund’s policy to cooperate fully with appropriate regulators in any investigations conducted with respect to potential money laundering, terrorism or other illicit activities.

How Shares Are Priced

W hen you buy shares, you pay the net asset value, plus any applicable sales charge. This is the offering price. Shares are also redeemed at the net asset value, minus any applicable deferred sales charge. The Funds calculate the net asset value of each class of their shares (generally by using market quotations) each day the New York Stock Exchange (the “Exchange”) is open as of the close of business on the Exchange, based on prices at the time of closing. The Exchange generally closes at 4:00 p.m. Eastern time. The net asset value used in determining your share price is the next one calculated after your purchase or redemption order is placed. Foreign securities owned by the Funds may trade on weekends or other days when the Funds do not price their shares. As a result, the Funds’ net asset value may change on days when you will not be able to purchase or redeem Fund shares.

Generally, Institutional shares will have the highest net asset value because that class has the lowest expenses, and Investor A and Service shares will have a higher net asset value than Investor B, Investor C or Class R shares, and Class R shares will have a higher net asset value than Investor B or Investor C shares. Also, dividends paid on Investor A, Service, Institutional and Class R shares will generally be higher than dividends paid on Investor B and Investor C shares because Investor A, Service, Institutional and Class R shares have lower expenses.

The Funds invest primarily in the securities of U.S. issuers or in ADRs of foreign issuers that trade in the U.S. markets. Therefore, each Fund generally prices its securities as of the close of the Exchange based on the closing market prices of the securities. However, if market quotations are not readily available or, in the Investment Adviser’s judgment, do not accurately reflect fair value for a security, that security will be valued by another method that the Board of Directors believes more accurately reflects the fair value.

The Board has adopted valuation procedures for the Funds and has delegated the day-to-day responsibility for fair value determinations to the Investment Adviser’s Valuation Committee. Fair value determinations by the Investment Adviser that affect a Fund’s net asset value are subject to review, approval or ratification, as appropriate, by the Board. In determining whether current market prices are readily available or accurately reflect a security’s fair value, the Investment Adviser monitors the information it receives in the ordinary course of its investment

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management responsibilities for significant events that it believes in good faith will affect the market prices of the securities of issuers held by the Fund. Those may include events affecting specific issuers (for example, a halt in trading of an issuer’s securities during the trading day or a company announcement) or events affecting securities markets generally (for example, market volatility or a natural disaster).

The Funds’ use of fair value pricing is designed to ensure that each Fund’s net asset value reflects the value of its underlying portfolio securities as accurately as possible. There can be no assurance, however, that a fair valuation used by a Fund on any given day will more accurately reflect the market value of a security or securities than the market price of such security or securities on that day.

The Funds may accept orders from certain authorized financial intermediaries or their designees. The Funds will be deemed to receive an order when accepted by the financial intermediary or designee and the order will receive the net asset value next computed by the Fund after such acceptance. If the payment for a purchase order is not made by a designated later time, the order will be cancelled and the financial intermediary could be held liable for any losses.

Participation in Fee-based Programs

I f you participate in certain fee-based programs offered by the Investment Adviser or an affiliate of the Investment Adviser, or selected securities dealers or other financial intermediaries that have agreements with the Distributors, you may be able to buy Institutional shares, including by exchanges from other share classes. Sales charges on the shares being exchanged may be reduced or waived under certain circumstances.

You generally cannot transfer shares held through a fee-based program into another account. Instead, you will have to redeem your shares held through the program and purchase shares of another class, which may be subject to distribution and account maintenance fees. This may be a taxable event and you will pay any applicable sales charges.

Shareholders that participate in a fee based program generally have two options at termination. The program can be terminated and the shares liquidated or the program can be terminated and the shares held in an account. In general, when a shareholder chooses to continue to hold the shares, whatever share class was held in the program can be held after termination. Shares that have been held for less than specified periods within the program may be subject to a fee upon redemption. Shareholders that held Investor A or Institutional shares in the program are eligible to purchase additional shares of the respective share class of the fund, but may be subject to upfront sales charges. Additional purchases of Institutional shares are available only if you have an existing position at the time of purchase or are otherwise eligible for Institutional shares.

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IMPORTANT DEFINITIONS

Dividends — ordinary income and capital gains paid to shareholders. Dividends may be reinvested in additional Fund shares as they are paid.

‘‘BUYING A DIVIDEND’’

Unless your investment is in a tax deferred account, you may want to avoid buying shares shortly before a Fund pays a dividend. The reason? If you buy shares when a Fund has realized but not yet distributed ordinary income or capital gains, you will pay the full price for the shares and then receive a portion of the price back in the form of a taxable dividend. Before investing you may want to consult your tax adviser.

Details about these features and the relevant charges are included in the client agreement for each fee-based program and are available from your financial adviser, selected securities dealer or other financial intermediary.

Dividends and Taxes

T he Funds will distribute net investment income, if any, and net realized capital gains, if any, at least annually. The Funds may also pay a special distribution at the end of the calendar year to comply with Federal tax requirements. Dividends may be reinvested automatically in shares of the Fund at net asset value without a sales charge or may be taken in cash. If you would like to receive dividends in cash, contact your financial adviser, selected securities dealer, other financial intermediary or the Transfer Agent. Although this cannot be predicted with any certainty, each Fund anticipates that the majority of its dividends, if any, will consist of capital gains. Capital gains may be taxable to you at different rates depending on how long a Fund held the assets sold.

You will pay tax on dividends from a Fund whether you receive them in cash or additional shares. If you redeem Fund shares or exchange them for shares of another fund, you generally will be treated as having sold your shares and any gain on the transaction may be subject to tax. Certain dividend income, including dividends received from some foreign corporations, and long-term capital gain are eligible for taxation at a reduced rate that applies to non-corporate shareholders. To the extent the Funds make any distributions derived from long-term capital gain and qualifying dividend income, such distributions will be eligible for taxation at the reduced rate.

If you are neither a lawful permanent resident nor a citizen of the United States or if you are a foreign entity, a Fund’s ordinary income dividends will generally be subject to a 30% U.S. withholding tax, unless a lower treaty rate applies. However, for taxable years beginning after December 31, 2004 and before January 1, 2008, certain distributions designated by the Fund as either interest related dividends or short-term gain dividends and paid to a foreign shareholder would be eligible for an exemption from U.S. withholding tax.

Dividends and interest received by the Funds may give rise to withholding and other taxes imposed by foreign countries. Tax conventions between certain countries and the United States may reduce or eliminate such taxes.

By law, your dividends and redemption proceeds will be subject to a withholding tax if you have not provided a taxpayer identification number or social security number or if the number you have provided is incorrect.

This section summarizes some of the consequences under current Federal tax law of an investment in a Fund. It is not a substitute for personal tax advice. Consult your personal tax adviser about the potential tax consequences of an investment in a Fund under all applicable tax laws.

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Electronic Delivery

E lectronic copies of most financial reports and prospectuses are available on the Funds’ website. Shareholders can sign up for e-mail notifications of quarterly statements, annual and semiannual reports and prospectuses by enrolling in the Fund’s electronic delivery program. To enroll:

Shareholders Who Hold Accounts with Investment Advisers, Banks or Brokerages:

Please contact your financial adviser. Please note that not all investment advisers, banks or brokerages may offer this service.

Shareholders Who Hold Accounts Directly With BlackRock:

Delivery of Shareholder Documents

T he Funds deliver only one copy of shareholder documents, including prospectuses, shareholder reports and proxy statements, to shareholders with multiple accounts at the same address. This practice is known as “householding” and is intended to eliminate duplicate mailings and reduce expenses. Mailings of your shareholder documents may be householded indefinitely unless you instruct us otherwise. If you do not want the mailing of these documents to be combined with those for other members of your household, please contact your Fund at (800) 441-7762.

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