UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSRS CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-09637 811-09739 Name of Fund: BlackRock Large Cap Series Funds, Inc. BlackRock Large Cap Series Trust Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer, BlackRock Large Cap Series Funds, Inc. and BlackRock Large Cap Series Trust, 800 Scudders Mill Road, Plainsboro, NJ 08536. Mailing address: P.O. Box 9011, Princeton, NJ 08543-9011 Registrant's telephone number, including area code: (800) 441-7762 Date of fiscal year end: 10/31/07 Date of reporting period: 11/01/06 - 04/30/07 Item 1 - Report to Stockholders ALTERNATIVES BLACKROCK SOLUTIONS EQUITIES FIXED INCOME LIQUIDITY REAL ESTATE BlackRock BLACKROCK Large Cap Series Funds, Inc. SEMI-ANNUAL REPORT APRIL 30, 2007 | (UNAUDITED) BlackRock Large Cap Core Fund BlackRock Large Cap Growth Fund BlackRock Large Cap Value Fund NOT FDIC INSURED MAY LOSE VALUE NO BANK GUARANTEE BlackRock Large Cap Series Funds, Inc. Officers and Directors/Trustees Robert C. Doll, Jr., Fund/Trust President, Director/Trustee and Portfolio Manager James H. Bodurtha, Director/Trustee Kenneth A. Froot, Director/Trustee Joe Grills, Director/Trustee Herbert I. London, Director/Trustee Roberta Cooper Ramo, Director/Trustee Robert S. Salomon, Jr., Director/Trustee Donald C. Burke, Vice President and Treasurer Karen Clark, Fund/Trust Chief Compliance Officer Alice A. Pellegrino, Secretary Custodian Brown Brothers Harriman & Co. 40 Water Street Boston, MA 02109-3661 Transfer Agent PFPC Inc. Wilmington, DE 19809 Fund Address P.O. Box 9011 Princeton, NJ 08543-9011 2 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 A Letter to Shareholders Dear Shareholder In its first four months, 2007 could already be termed an eventful year for investors. For most financial markets, 2007 opened just as 2006 ended -- on a positive trajectory. Then, at the end of February and into March, global equity markets registered their first significant decline since last summer. The market jitters were triggered by a significant setback in the Chinese market and were exacerbated by worries of a weakening economy, escalating geopolitical concerns and rising delinquencies in the subprime mortgage market. Still, underlying stock market fundamentals appeared quite sound, supported by a generally favorable global economic backdrop, tame inflation, slowing but still positive earnings growth, relatively low interest rates and attractive valuations. These conditions prevailed later, and the Dow Jones Industrial Average crossed the 13,000 mark for the first time in its history in late April. Not unlike the equity market, the bond market also experienced volatility as observers attempted to interpret mixed economic signals. A bond market rally (falling yields and rising prices) late last year reversed itself early in 2007 amid some transitory signs of economic strength. Overall, yields have fluctuated month to month but ended April little changed from the beginning of the year. However, compared to one year ago, yields on 30-year Treasury bonds fell 36 basis points (.36%) and 10-year yields fell 44 basis points, while prices correspondingly rose. For its part, the Federal Reserve Board (the Fed) has left the target short-term interest rate on hold at 5.25% since first pausing in its interest rate-hiking campaign on August 8, 2006. The central bankers continue to express concern about potential inflationary pressures, but also acknowledge signs of economic weakness. Given this relatively "balanced" assessment, most observers believe the Fed will keep interest rates on hold for now. Against this backdrop, most major market indexes posted positive returns for the annual and semi-annual reporting periods ended April 30, 2007: Total Returns as of April 30, 2007 6-month 12-month ================================================================================================================== U.S. equities (Standard & Poor's 500 Index) + 8.60% +15.24% - ------------------------------------------------------------------------------------------------------------------ Small cap U.S. equities (Russell 2000 Index) + 6.86 + 7.83 - ------------------------------------------------------------------------------------------------------------------ International equities (MSCI Europe, Australasia, Far East Index) +15.46 +19.81 - ------------------------------------------------------------------------------------------------------------------ Fixed income (Lehman Brothers Aggregate Bond Index) + 2.64 + 7.36 - ------------------------------------------------------------------------------------------------------------------ Tax-exempt fixed income (Lehman Brothers Municipal Bond Index) + 1.59 + 5.78 - ------------------------------------------------------------------------------------------------------------------ High yield bonds (Lehman Brothers U.S. Corporate High Yield 2% Issuer Cap Index) + 6.96 +11.72 - ------------------------------------------------------------------------------------------------------------------ If the first four months are any guide, 2007 could be a year of enhanced market volatility. As you navigate the uncertainties, we encourage you to review your investment goals with your financial professional and to make portfolio changes, as needed. For more insight, we invite you to view "What's Ahead in 2007: An Investment Perspective" and "Are You Prepared for Volatility?" at www.blackrock.com/funds. We thank you for entrusting BlackRock with your investment assets, and we look forward to continuing to serve you in the months and years ahead. Sincerely, /s/ Robert C. Doll, Jr. Robert C. Doll, Jr. Fund/Trust President and Director/Trustee BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 3 A Discussion With Your Funds' Portfolio Manager Amid a volatile investment backdrop, the Funds provided strong absolute and relative returns for the period compared to their respective benchmarks and Lipper category averages. How did the Funds perform during the period in light of the existing market conditions? For the six-month period ended April 30, 2007, BlackRock Large Cap Core Fund's Institutional, Investor A, Investor B, Investor C and Class R Shares had total returns of +9.45%, +9.32%, +8.88%, +8.98% and +9.23%, respectively, competitive with the +9.10% return of the benchmark Russell 1000 Index and the +9.08% average return of its comparable Lipper category of Multi-Cap Core Funds.* BlackRock Large Cap Growth Fund's Institutional, Service, Investor A, Investor B, Investor C and Class R Shares had total returns of +10.55%, +10.47%, +10.46%, +9.90%, +9.91% and +10.24%, respectively, exceeding the +8.42% return of the benchmark Russell 1000 Growth Index and the +9.13% average return of its comparable Lipper category of Multi-Cap Growth Funds.* BlackRock Large Cap Value Fund's Institutional, Service, Investor A, Investor B, Investor C and Class R Shares had total returns of +10.52%, +10.34%, +10.45%, +9.96%, +9.93% and +10.30%, respectively, also surpassing the +9.79% return of its benchmark, the Russell 1000 Value Index, and the +9.70% average return of the Lipper Multi-Cap Value Funds category for the six-month period.* (Fund results shown do not reflect sales charges and would be lower if sales charges were included. Complete performance information for each Fund can be found on pages 6 - 10 of this report to shareholders.) The Funds invest in large-capitalization stocks that represent a significant part of the U.S. stock market and, therefore, were influenced by the same economic and market events that affected the broader stock market during the past six months. That investment environment was challenging at times. The beginning of the period saw mid-term elections in Congress in which control shifted from Republicans to Democrats. We believe this shift is likely to change the course of legislation over the next few years. Free trade policies, healthcare-related legislation (such as Medicare prescription drug benefits) and tax policies (specifically, moderating or eliminating reduced taxation) all may be affected in the near future. Economic news was mixed throughout the period, but its impact on the market was at first minimal, as the beginning of the period saw equities reach record highs. Although fears over a weakening U.S. housing market and a slowdown in consumer spending sparked investor concern, markets rallied from the start of the period until February, when the Dow Jones Industrial Average, the U.S. index containing 30 stocks listed on the New York Stock Exchange, lost more than 416 points. This represented the largest one week decline in the markets since September 2001, and came on the heels of a substantial correction in Asian markets, particularly China. The markets rebounded in the weeks that followed, but remained volatile amid an increase in subprime mortgage delinquencies and the high-profile bankruptcy of a leading subprime mortgage company. However, there was ongoing investor debate as to whether the subprime meltdown would spread through other parts of the economy. During the reporting period, crude oil prices stabilized under $61 per barrel thanks to unseasonably warm winter weather and ample inventories from non-OPEC countries. The Federal Reserve Board (the Fed) remained at a pause in its monetary policy, keeping interest rates steady at 5.25%. Gross domestic product (GDP) for first quarter 2007 was revised down to 1.3%, compared to 2.5% growth in fourth quarter 2006. What factors most influenced the Funds' performance during the period? Stock selection drove performance results for all three funds, particularly within the energy (fuel), consumer staples (food retail), health care (providers and pharmaceuticals), financials (banks) and industrials (machinery) sectors. A meaningful underweighting of the financials sector also contributed positively to the Funds' relative performance. At the individual stock level, BlackRock Large Cap Core Fund benefited most from its positions in Goodyear Tire & Rubber Co., Southern Copper Corp., Schering-Plough Corp., Cummins, Inc. and Holly Corp. The largest detractors were * Lipper Multi-Cap funds invest in a variety of market capitalization ranges without concentrating 75% of their equity assets in any one market-capitalization range over an extended period of time. Multi-Cap Core funds typically have an average price-to-earnings ratio, price-to-book ratio and three-year sales-per-share growth value compared to the S&P SuperComposite 1500 Index. Multi-Cap Growth funds typically have an above-average price-to-earnings ratio, price-to-book ratio and three-year sales-per-growth value compared to the S&P SuperComposite 1500 Index. Multi-Cap Value funds typically have a below-average price-to-earnings ratio, price-to-book ratio and three-year sales-per-growth value compared to the S&P SuperComposite 1500 Index. 4 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 technology companies BEA Systems, Inc., Lexmark International, Inc. and Intuit, Inc., and retailers Ann Taylor Stores Corp. and Office Depot, Inc. In BlackRock Large Cap Growth Fund, the largest positive contributors to performance were Tesoro Corp., Avnet, Inc., Amgen Inc., Schering-Plough and ITT Educational Services Inc., while the largest detractors were BEA Systems, Ann Taylor Stores, Lexmark International, Office Depot and Applied Biosystems Group. The largest contributors to performance for BlackRock Large Cap Value Fund during the six-month period were Tesoro, Cummins, Bank of America Corp., The Kroger Co. and Avnet, and the largest detractors were Lexmark, Applied Biosystems, Motorola, Inc., Office Depot and General Motors Corp. As important as it was that we invested in stocks that performed well, it was equally significant that we avoided those that did not perform well. Examples of stocks that performed poorly within the benchmark, but aided the Funds' relative results because they were underweighted in the portfolios, include: Amgen and Starbucks Corp. within Large Cap Core Fund, Starbucks and Advanced Micro Devices, Inc. within Large Cap Growth Fund, and Equity Residential within Large Cap Value Fund. What changes were made to the Funds' portfolios during the period? Overall, we continued to identify companies with favorable growth characteristics and earnings developments selling at attractive relative valuations. As a result of our bottom-up stock-selection process, we increased the Funds' positions in health care and reduced their exposure to the energy, consumer discretionary, industrials and consumer staples sectors. In Large Cap Core Fund, the largest purchases during the period in terms of dollars spent were in UnitedHealth Group, Inc., Schering-Plough Corp., Coach, Inc., CIGNA Corp. and Applied Materials, Inc. The largest sales were in Merck & Co. Inc., Texas Instruments, Inc., Occidental Petroleum Corp., Motorola Inc. and Cardinal Health Inc. In Large Cap Growth Fund, the largest purchases were in International Business Machines Corp., UnitedHealth Group, WellPoint, Inc., Applied Materials and Schering-Plough, while the largest sales were in Texas Instruments, Motorola, Abercrombie & Fitch Co., Emdeon Corp. and LSI Logic Corp. In Large Cap Value Fund, the largest purchases were in Valero Energy Corp., H.J. Heinz Co., WellPoint, International Business Machines and AT&T Inc. The largest sales were in Occidental Petroleum Corp., Motorola, Caremark Rx, Inc., Ann Taylor Stores and Dillard's, Inc. These transactions reflect our ongoing refinement of the portfolios, as we continue to look for stocks that best meet our investment criteria while pruning those that have deteriorated versus our original assessment. How would you characterize the Funds' positioning at the close of the period? As of April 30, 2007, the Funds' largest overweights relative to their respective benchmarks were in information technology, consumer discretionary, health care and materials, and the largest underweights were in financials, consumer staples and telecommunication services. Given the mounting evidence of slowing economic growth, attention is increasingly focusing on the Fed, with many observers wondering when the central bank will begin cutting interest rates. Despite weaker growth rates, however, it appears there are still enough mitigating factors to keep the Fed on hold for now. Having said that, we do believe the Fed will begin cutting interest rates by the end of the year as the economy continues to slow and as inflationary pressures recede. Based on the equity market run-up at the end of the period, there has been some concern that stocks may be overbought, which could result in some sort of near-term market correction. We acknowledge that the markets face headwinds in the form of slowing economic growth, weakening corporate earnings growth and a Fed that is not presently accommodative. In our opinion, however, the backdrop for an equity bear market simply does not exist. Monetary policy is by no means overly tight, inflation (while higher than the Fed would like) is still low and seems to be easing, and earnings growth is slowing, not collapsing. From our perspective, the tailwinds of good valuation levels, strong global economic growth, ongoing corporate deal activity and the relative attractiveness of stocks compared to other investments (chiefly bonds) should help the equity bull market to continue. Robert C. Doll, Jr. Fund/Trust President, Director/Trustee and Portfolio Manager May 14, 2007 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 5 Performance Data About Fund Performance Effective October 2, 2006, the Funds' Class A, Class B, Class C and Class I Shares were redesignated Investor A, Investor B, Investor C and Institutional Shares, respectively. Class R Shares did not change their designation. Also effective October 2, 2006, Service Shares commenced operations. As previously communicated to shareholders, new sales charge schedules came into effect at the same time for certain of these classes. Each Fund has multiple classes of shares: o Institutional Shares are not subject to any sales charge. Institutional Shares bear no ongoing distribution or service fees and are available only to eligible investors. o Service Shares are not subject to any sales charge. Service Shares are subject to a service fee of 0.25% per year (but no distribution fee) and are available only to eligible investors. Prior to October 2, 2006, Service Share performance results are those of Institutional Shares (which have no distribution or service fees) restated to reflect the Service Share fees. Service Shares are offered only by BlackRock Large Cap Growth Fund and BlackRock Large Cap Value Fund. o Investor A Shares incur a maximum initial sales charge (front-end load) of 5.25% and a service fee of 0.25% per year (but no distribution fee). o Investor B Shares are subject to a maximum contingent deferred sales charge of 4.50% declining to 0% after six years. In addition, Investor B Shares are subject to a distribution fee of 0.75% per year and a service fee of 0.25% per year. These shares automatically convert to Investor A Shares after approximately eight years. (There is no initial sales charge for automatic share conversions.) All returns for periods greater than eight years reflect this conversion. o Investor C Shares are subject to a distribution fee of 0.75% per year and a service fee of 0.25% per year. In addition, Investor C Shares are subject to a 1% contingent deferred sales charge if redeemed within one year of purchase. o Class R Shares do not incur a maximum initial sales charge (front-end load) or deferred sales charge. These shares are subject to a distribution fee of 0.25% per year and a service fee of 0.25% per year. Class R Shares are available only to certain retirement plans. Prior to inception, Class R Share performance results are those of Institutional Shares (which have no distribution or service fees) restated for Class R Share fees. Performance information reflects past performance and does not guarantee future results. Current performance may be lower or higher than the performance data quoted. Refer to www.blackrock.com to obtain performance data current to the most recent month-end. Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. Figures shown in each of the following tables assume reinvestment of all dividends and capital gain distributions, if any, at net asset value on the ex-dividend date. Investment return and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Dividends paid to each class of shares will vary because of the different levels of service, distribution and transfer agency fees applicable to each class, which are deducted from the income available to be paid to shareholders. 6 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Performance Data (continued) Recent Performance Results 6-Month 12-Month Since Inception As of April 30, 2007 Total Return Total Return Total Return ===================================================================================================================== BlackRock Large Cap Core Fund Institutional Shares* + 9.45% +12.10% + 70.31% - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Core Fund Investor A Shares* + 9.32 +11.76 + 67.22 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Core Fund Investor B Shares* + 8.88 +10.93 + 57.92 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Core Fund Investor C Shares* + 8.98 +10.96 + 57.96 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Core Fund Class R Shares* + 9.23 +11.49 + 64.93 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund Institutional Shares* +10.55 +10.03 + 17.58 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund Service Shares* +10.47 + 9.73 + 15.41 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund Investor A Shares* +10.46 + 9.72 + 15.37 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund Investor B Shares* + 9.90 + 8.81 + 8.93 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund Investor C Shares* + 9.91 + 8.81 + 8.84 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund Class R Shares* +10.24 + 9.38 + 13.88 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Value Fund Institutional Shares* +10.52 +14.74 +133.49 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Value Fund Service Shares* +10.34 +14.39 +129.11 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Value Fund Investor A Shares* +10.45 +14.50 +129.31 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Value Fund Investor B Shares* + 9.96 +13.54 +116.64 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Value Fund Investor C Shares* + 9.93 +13.58 +116.60 - --------------------------------------------------------------------------------------------------------------------- BlackRock Large Cap Value Fund Class R Shares* +10.30 +14.20 +126.30 - --------------------------------------------------------------------------------------------------------------------- Russell 1000(R) Index** + 9.10 +15.16 + 21.06 - --------------------------------------------------------------------------------------------------------------------- Russell 1000(R) Growth Index*** + 8.42 +12.25 - 23.61 - --------------------------------------------------------------------------------------------------------------------- Russell 1000(R) Value Index**** + 9.79 +18.15 + 81.41 - --------------------------------------------------------------------------------------------------------------------- * Investment results shown do not reflect sales charges; results shown would be lower if a sales charge was included. Cumulative total investment returns are based on changes in net asset values for the periods shown, and assume reinvestment of all dividends and capital gains distributions at net asset value on the ex-dividend date. Since inception total return is from 12/22/99. ** This unmanaged broad-based Index measures the performance of the 1,000 largest companies in the Russell 3000(R) Index, which represents approximately 92% of the total market capitalization of the Russell 3000 Index. Since inception total return is from 12/22/99. *** This unmanaged broad-based Index is a subset of the Russell 1000 Index consisting of those Russell 1000 securities with a greater-than-average growth orientation. Since inception total return is from 12/22/99. **** This unmanaged broad-based Index is a subset of the Russell 1000 Index consisting of those Russell 1000 securities with lower price/book ratios and lower forecasted growth values. Since inception total return is from 12/22/99. Russell 1000 is a registered trademark of the Frank Russell Company. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 7 Performance Data (continued) BlackRock Large Cap Core Fund BlackRock Large Cap Series Funds -- Edgar BlackRock Large Cap Core Fund Total Return Based on a $10,000 Investment A line graph depicting the growth of an investment in the Fund's Institutional, Investor A, Investor B, Investor C & Class R Shares compared to growth of an investment in the Russell 1000 Index. Values are from December 22, 1999 to April 2007: Institutional Investor A Investor B Investor C Class R Russell 1000 Shares*+ Shares*+ Shares*+ Shares*+ Shares*+ Index++ 12/22/99** $10,000 $ 9,475 $10,000 $10,000 $10,000 $10,000 4/00 $11,910 $11,275 $11,870 $11,870 $11,889 $10,312 4/01 $10,165 $ 9,592 $10,021 $10,021 $10,096 $ 8,903 4/02 $10,024 $ 9,440 $ 9,781 $ 9,781 $ 9,907 $ 7,837 4/03 $ 8,374 $ 7,876 $ 8,091 $ 8,091 $ 8,258 $ 6,782 4/04 $10,765 $10,085 $10,291 $10,291 $10,573 $ 8,403 4/05 $12,039 $11,254 $11,395 $11,395 $11,776 $ 9,008 4/06 $15,193 $14,177 $14,236 $14,236 $14,792 $10,513 4/07 $17,031 $15,844 $15,792 $15,796 $16,493 $12,106 * Assuming maximum sales charge, if any, transaction costs and other operating expenses, including administration fees. ** Commencement of operations. + The Fund invests all of its assets in Master Large Cap Core Portfolio of Master Large Cap Series Trust. The Portfolio invests primarily in a diversified portfolio of equity securities of large cap companies located in the United States that the Manager believes blends growth and value. ++ This unmanaged broad-based Index measures the performance of the 1,000 largest companies in the Russell 3000(R) Index, which represents approximately 92% of the total market capitalization of the Russell 3000 Index. Past performance is not indicative of future results. Average Annual Total Return ================================================================================ Institutional Shares Return ================================================================================ One Year Ended 4/30/07 +12.10% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +11.18 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 + 7.51 - -------------------------------------------------------------------------------- Return Without Return With Sales Charge Sales Charge* ================================================================================ Investor A Shares ================================================================================ One Year Ended 4/30/07 +11.76% +5.89% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +10.91 +9.72 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 + 7.24 +6.46 - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC+++ ================================================================================ Investor B Shares++ ================================================================================ One Year Ended 4/30/07 +10.93% +6.43% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +10.05 +9.78 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 + 6.41 +6. 41 - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC+++ ================================================================================ Investor C Shares+ ================================================================================ One Year Ended 4/30/07 +10.96% + 9.96% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +10.06 +10.06 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 + 6.41 + 6.41 - -------------------------------------------------------------------------------- ================================================================================ Class R Shares Return ================================================================================ One Year Ended 4/30/07 +11.49% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +10.73 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 + 7.04 - -------------------------------------------------------------------------------- * Assuming maximum sales charge of 5.25%. + Maximum contingent deferred sales charge is 1% and is reduced to 0% after one year. ++ Maximum contingent deferred sales charge is 4.50% and is reduced to 0% after six years. +++ Assuming payment of applicable contingent deferred sales charge. 8 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Performance Data (continued) BlackRock Large Cap Growth Fund BlackRock Large Cap Growth Fund Total Return Based on a $10,000 Investment A line graph depicting the growth of an investment in the Fund's Institutional, Service, Investor A, Investor B, Investor C & Class R Shares compared to growth of an investment in the Russell 1000 Growth Index. Values are from December 22, 1999 to April 2007: Russell Institutional Service Investor A Investor B Investor C Class R 1000 Growth Shares*+ Shares*+ Shares*+ Shares*+ Shares*+ Shares*+ Index++ 12/22/99** $10,000 $10,000 $ 9,475 $10,000 $10,000 $10,000 $10,000 4/00 $12,090 $12,079 $11,436 $12,040 $12,040 $12,069 $10,435 4/01 $ 8,595 $ 8,565 $ 8,114 $ 8,481 $ 8,472 $ 8,536 $ 7,070 4/02 $ 7,874 $ 7,828 $ 7,413 $ 7,691 $ 7,682 $ 7,782 $ 5,648 4/03 $ 6,373 $ 6,320 $ 5,981 $ 6,151 $ 6,152 $ 6,277 $ 4,838 4/04 $ 8,094 $ 8,006 $ 7,583 $ 7,741 $ 7,732 $ 7,964 $ 5,885 4/05 $ 8,555 $ 8,441 $ 7,991 $ 8,091 $ 8,092 $ 8,370 $ 5,909 4/06 $10,686 $10,517 $ 9,963 $10,012 $10,003 $10,412 $ 6,806 4/07 $11,758 $11,541 $10,931 $10,893 $10,884 $11,388 $ 7,639 * Assuming maximum sales charge, if any, transaction costs and other operating expenses, including administration fees. ** Commencement of operations. + The Fund invests all of its assets in Master Large Cap Growth Portfolio of Master Large Cap Series Trust. The Portfolio invests primarily in a diversified portfolio of equity securities of large cap companies located in the United States that the Manager believes have good prospects for earnings growth. ++ This unmanaged broad-based Index is a subset of the Russell 1000 Index consisting of those Russell 1000 securities with a greater-than-average growth orientation. Past performance is not indicative of future results. Average Annual Total Return Institutional Shares Return ================================================================================ One Year Ended 4/30/07 +10.03% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 + 8.35 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 + 2.23 - -------------------------------------------------------------------------------- Service Shares Return ================================================================================ One Year Ended 4/30/07 +9.73% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +8.07 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +1.97 - -------------------------------------------------------------------------------- Return Without Return With Sales Charge Sales Charge* ================================================================================ Investor A Shares ================================================================================ One Year Ended 4/30/07 +9.72% +3.96% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +8.08 +6.92 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +1.96 +1.22 - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC+++ ================================================================================ Investor B Shares++ ================================================================================ One Year Ended 4/30/07 +8.81% +4.31% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +7.21 +6.90 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +1.17 +1.17 - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC+++ ================================================================================ Investor C Shares+ ================================================================================ One Year Ended 4/30/07 +8.81% +7.81% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +7.22 +7.22 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +1.16 +1.16 - -------------------------------------------------------------------------------- ================================================================================ Class R Shares Return ================================================================================ One Year Ended 4/30/07 +9.38% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +7.91 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +1.78 - -------------------------------------------------------------------------------- * Assuming maximum sales charge of 5.25%. + Maximum contingent deferred sales charge is 1% and is reduced to 0% after one year. ++ Maximum contingent deferred sales charge is 4.50% and is reduced to 0% after six years. +++ Assuming payment of applicable contingent deferred sales charge. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 9 Performance Data (concluded) BlackRock Large Cap Value Fund BlackRock Large Cap Value Fund Total Return Based on a $10,000 Investment A line graph depicting the growth of an investment in the Fund's Institutional, Service, Investor A, Investor B, Investor C & Class R Shares compared to growth of an investment in the Russell 1000 Value Index. Values are from December 22, 1999 to April 2007: Russell Institutional Service Investor A Investor B Investor C Class R 1000 Value Shares*+ Shares*+ Shares*+ Shares*+ Shares*+ Shares*+ Index++ 12/22/99** $10,000 $10,000 $ 9,475 $10,000 $10,000 $10,000 $10,000 4/00 $10,850 $10,840 $10,271 $10,820 $10,820 $10,831 $10,142 4/01 $11,746 $11,706 $11,088 $11,581 $11,581 $11,667 $10,794 4/02 $12,326 $12,254 $11,600 $12,031 $12,031 $12,183 $10,372 4/03 $10,374 $10,287 $ 9,750 $10,031 $10,031 $10,236 $ 9,023 4/04 $13,908 $13,758 $13,032 $13,311 $13,301 $13,679 $11,392 4/05 $15,930 $15,719 $14,889 $15,087 $15,088 $15,596 $12,979 4/06 $20,349 $20,030 $18,976 $19,080 $19,070 $19,816 $15,355 4/07 $23,349 $22,911 $21,727 $21,664 $21,660 $22,630 $18,141 * Assuming maximum sales charge, if any, transaction costs and other operating expenses, including administration fees. ** Commencement of operations. + The Fund invests all of its assets in Master Large Cap Value Portfolio of the Master Large Cap Series Trust. The Portfolio invests primarily in a diversified portfolio of equity securities of large cap companies located in the United States that the Manager believes are undervalued. ++ This unmanaged broad-based Index is a subset of the Russell 1000 Index consisting of those Russell 1000 securities with lower price/book ratios and lower forecasted growth values. Past performance is not indicative of future results. Average Annual Total Return Institutional Shares Return ================================================================================ One Year Ended 4/30/07 +14.74% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +13.63 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +12.22 - -------------------------------------------------------------------------------- Service Shares Return ================================================================================ One Year Ended 4/30/07 +14.39% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +13.33 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +11.93 - -------------------------------------------------------------------------------- Return Without Return With Sales Charge Sales Charge* ================================================================================ Investor A Shares ================================================================================ One Year Ended 4/30/07 +14.50% + 8.48% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +13.37 +12.16 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +11.94 +11.12 - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC+++ ================================================================================ Investor B Shares++ ================================================================================ One Year Ended 4/30/07 +13.54% + 9.04% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +12.48 +12.23 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +11.08 +11.08 - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC+++ ================================================================================ Investor C Shares+ ================================================================================ One Year Ended 4/30/07 +13.58% +12.58% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +12.48 +12.48 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +11.08 +11.08 - -------------------------------------------------------------------------------- ================================================================================ Class R Shares Return ================================================================================ One Year Ended 4/30/07 +14.20% - -------------------------------------------------------------------------------- Five Years Ended 4/30/07 +13.19 - -------------------------------------------------------------------------------- Inception (12/22/99) through 4/30/07 +11.74 - -------------------------------------------------------------------------------- * Assuming maximum sales charge of 5.25%. + Maximum contingent deferred sales charge is 1% and is reduced to 0% after one year. ++ Maximum contingent deferred sales charge is 4.50% and is reduced to 0% after six years. +++ Assuming payment of applicable contingent deferred sales charge. 10 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Disclosure of Expenses Shareholders of these Funds may incur the following charges: (a) expenses related to transactions, including sales charges, redemption fees and exchange fees; and (b) operating expenses including advisory fees, distribution fees including 12b-1 fees, and other Fund expenses. The following example (which is based on a hypothetical investment of $1,000 invested on November 1, 2006 and held through April 30, 2007) is intended to assist shareholders both in calculating expenses based on an investment in each Fund and in comparing these expenses with similar costs of investing in other mutual funds. The first table below provides information about actual account values and actual expenses. In order to estimate the expenses a shareholder paid during the period covered by this report, shareholders can divide their account value by $1,000 and then multiply the result by the number in the first line under the heading entitled "Expenses Paid During the Period." The second table below provides information about hypothetical account values and hypothetical expenses based on each Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses. In order to assist shareholders in comparing the ongoing expenses of investing in these Funds and other funds, compare the 5% hypothetical example with the 5% hypothetical examples that appear in other funds' shareholder reports. The expenses shown in the table are intended to highlight shareholders' ongoing costs only and do not reflect any transactional expenses, such as sales charges, redemption fees or exchange fees. Therefore, the second table is useful in comparing ongoing expenses only, and will not help shareholders determine the relative total expenses of owning different funds. If these transactional expenses were included, shareholder expenses would have been higher. BlackRock Large Cap Core Fund Expenses Paid Beginning Ending During the Period* Account Value Account Value November 1, 2006 November 1, 2006 April 30, 2007 to April 30, 2007 ======================================================================================================================== Actual ======================================================================================================================== Institutional $1,000 $1,094.50 $4.47 - ------------------------------------------------------------------------------------------------------------------------ Investor A $1,000 $1,093.20 $5.76 - ------------------------------------------------------------------------------------------------------------------------ Investor B $1,000 $1,088.80 $9.79 - ------------------------------------------------------------------------------------------------------------------------ Investor C $1,000 $1,089.80 $9.74 - ------------------------------------------------------------------------------------------------------------------------ Class R $1,000 $1,092.30 $7.11 ======================================================================================================================== Hypothetical (5% annual return before expenses)** ======================================================================================================================== Institutional $1,000 $1,020.54 $4.31 - ------------------------------------------------------------------------------------------------------------------------ Investor A $1,000 $1,019.30 $5.56 - ------------------------------------------------------------------------------------------------------------------------ Investor B $1,000 $1,015.43 $9.44 - ------------------------------------------------------------------------------------------------------------------------ Investor C $1,000 $1,015.48 $9.39 - ------------------------------------------------------------------------------------------------------------------------ Class R $1,000 $1,018.01 $6.85 - ------------------------------------------------------------------------------------------------------------------------ * For each class of the Fund, expenses are equal to the annualized expense ratio for the class (.86% for Institutional, 1.11% for Investor A, 1.89% for Investor B, 1.88% for Investor C and 1.37% for Class R), multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period shown). Because the Fund is a feeder fund, the expense table example reflects the expenses of both the feeder fund and the master portfolio in which it invests. ** Hypothetical 5% annual return before expenses is calculated by pro-rating the number of days in the most recent fiscal half year divided by 365. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 11 Disclosure of Expenses (continued) BlackRock Large Cap Growth Fund Expenses Paid Beginning Ending During the Period* Account Value Account Value November 1, 2006 November 1, 2006 April 30, 2007 to April 30, 2007 ======================================================================================================================== Actual ======================================================================================================================== Institutional $1,000 $1,105.50 $ 4.96 - ------------------------------------------------------------------------------------------------------------------------ Service $1,000 $1,104.70 $ 6.52 - ------------------------------------------------------------------------------------------------------------------------ Investor A $1,000 $1,104.60 $ 6.47 - ------------------------------------------------------------------------------------------------------------------------ Investor B $1,000 $1,099.00 $10.88 - ------------------------------------------------------------------------------------------------------------------------ Investor C $1,000 $1,099.10 $10.51 - ------------------------------------------------------------------------------------------------------------------------ Class R $1,000 $1,102.40 $ 8.03 ======================================================================================================================== Hypothetical (5% annual return before expenses)** ======================================================================================================================== Institutional $1,000 $1,020.08 $ 4.76 - ------------------------------------------------------------------------------------------------------------------------ Service $1,000 $1,018.59 $ 6.26 - ------------------------------------------------------------------------------------------------------------------------ Investor A $1,000 $1,018.64 $ 6.21 - ------------------------------------------------------------------------------------------------------------------------ Investor B $1,000 $1,014.43 $10.44 - ------------------------------------------------------------------------------------------------------------------------ Investor C $1,000 $1,014.77 $10.09 - ------------------------------------------------------------------------------------------------------------------------ Class R $1,000 $1,017.15 $ 7.70 - ------------------------------------------------------------------------------------------------------------------------ * For each class of the Fund, expenses are equal to the annualized expense ratio for the class (.95% for Institutional, 1.25% for Service, 1.24% for Investor A, 2.09% for Investor B, 2.02% for Investor C and 1.54% for Class R), multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period shown). Because the Fund is a feeder fund, the expense table example reflects the expenses of both the feeder fund and the master portfolio in which it invests. ** Hypothetical 5% annual return before expenses is calculated by pro-rating the number of days in the most recent fiscal half year divided by 365. 12 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Disclosure of Expenses (concluded) BlackRock Large Cap Value Fund Expenses Paid Beginning Ending During the Period* Account Value Account Value November 1, 2006 November 1, 2006 April 30, 2007 to April 30, 2007 ======================================================================================================================== Actual ======================================================================================================================== Institutional $1,000 $1,105.20 $ 4.65 - ------------------------------------------------------------------------------------------------------------------------ Service $1,000 $1,103.40 $ 6.68 - ------------------------------------------------------------------------------------------------------------------------ Investor A $1,000 $1,104.50 $ 5.64 - ------------------------------------------------------------------------------------------------------------------------ Investor B $1,000 $1,099.60 $10.36 - ------------------------------------------------------------------------------------------------------------------------ Investor C $1,000 $1,099.30 $10.05 - ------------------------------------------------------------------------------------------------------------------------ Class R $1,000 $1,103.00 $ 7.35 ======================================================================================================================== Hypothetical (5% annual return before expenses)** ======================================================================================================================== Institutional $1,000 $1,020.39 $ 4.46 - ------------------------------------------------------------------------------------------------------------------------ Service $1,000 $1,018.45 $ 6.41 - ------------------------------------------------------------------------------------------------------------------------ Investor A $1,000 $1,019.44 $ 5.41 - ------------------------------------------------------------------------------------------------------------------------ Investor B $1,000 $1,014.93 $ 9.94 - ------------------------------------------------------------------------------------------------------------------------ Investor C $1,000 $1,015.23 $ 9.64 - ------------------------------------------------------------------------------------------------------------------------ Class R $1,000 $1,017.81 $ 7.05 - ------------------------------------------------------------------------------------------------------------------------ * For each class of the Fund, expenses are equal to the annualized expense ratio for the class (.89% for Institutional, 1.28% for Service, 1.08% for Investor A, 1.99% for Investor B, 1.93% for Investor C and 1.41% for Class R), multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period shown). Because the Fund is a feeder fund, the expense table example reflects the expenses of both the feeder fund and the master portfolio in which it invests. ** Hypothetical 5% annual return before expenses is calculated by pro-rating the number of days in the most recent fiscal half year divided by 365. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 13 Statements of Assets and Liabilities BlackRock Large Cap Series Funds, Inc. BlackRock BlackRock BlackRock Large Large Large Cap Core Cap Growth Cap Value As of April 30, 2007 (Unaudited) Fund Fund Fund ============================================================================================================================= Assets - ----------------------------------------------------------------------------------------------------------------------------- Investment in Master Large Cap Core Portfolio, Master Large Cap Growth Portfolio and Master Large Cap Value Portfolio (the "Portfolios"), respectively* ......... $ 4,200,837,563 $ 959,051,991 $ 4,804,961,007 Investment in Master S&P 500 Index Series (the "Series")**@ ........................................ 17,527,088 -- -- Prepaid expenses and other assets ..................... 114,512 12,990 38,964 ------------------------------------------------------- Total assets .......................................... 4,218,479,163 959,064,981 4,804,999,971 ------------------------------------------------------- ============================================================================================================================= Liabilities - ----------------------------------------------------------------------------------------------------------------------------- Payables: Distributor ....................................... 1,749,081 359,845 1,533,089 Administrator ..................................... 796,404 198,627 955,927 Other affiliates .................................. 29,071 22,826 151,791 Accrued expenses and other liabilities ................ -- 97,420 46,353 ------------------------------------------------------- Total liabilities ..................................... 2,574,556 678,718 2,687,160 ------------------------------------------------------- ============================================================================================================================= Net Assets - ----------------------------------------------------------------------------------------------------------------------------- Net assets ............................................ $ 4,215,904,607 $ 958,386,263 $ 4,802,312,811 ======================================================= ============================================================================================================================= Net Assets Consist of - ----------------------------------------------------------------------------------------------------------------------------- Undistributed (accumulated) investment income (loss) -- net ....................................... $ (2,451,743) $ (2,464,613) $ 4,336,644 Undistributed (accumulated) realized capital gains (losses) allocated from the Portfolios -- net ....... 106,451,550 (29,237,758) 93,433,999 Unrealized appreciation -- net ........................ 781,701,057 166,166,509 875,376,476 ------------------------------------------------------- Total accumulated earnings -- net ..................... 885,700,864 134,464,138 973,147,119 Institutional Shares of Common Stock, $.10 par value+ . 6,777,539 2,335,006 6,259,740 Service Shares of Common Stock, $.10 par value++ ...... -- 50,896 136,201 Investor A Shares of Common Stock, $.10 par value+++ .. 8,596,542 2,305,008 10,255,408 Investor B Shares of Common Stock, $.10 par value++++ . 2,778,872 1,030,076 1,636,031 Investor C Shares of Common Stock, $.10 par value+++++ 9,687,564 2,120,543 4,831,327 Class R Shares of Common Stock, $.10 par value++++++ .. 904,184 648,921 848,971 Paid-in capital in excess of par ...................... 3,301,459,042 815,431,675 3,805,198,014 ------------------------------------------------------- Net Assets ............................................ $ 4,215,904,607 $ 958,386,263 $ 4,802,312,811 ======================================================= 14 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Statements of Assets and Liabilities (concluded) BlackRock Large Cap Series Funds, Inc. BlackRock BlackRock BlackRock Large Large Large Cap Core Cap Growth Cap Value As of April 30, 2007 (Unaudited) Fund Fund Fund ============================================================================================================================= Net Asset Value - ----------------------------------------------------------------------------------------------------------------------------- Institutional: Net assets ................................................ $ 1,032,924,408 $ 273,425,145 $ 1,290,333,007 ======================================================= Shares outstanding ........................................ 67,775,389 23,350,056 62,597,399 ======================================================= Net asset value ........................................... $ 15.24 $ 11.71 $ 20.61 ======================================================= Service: Net assets ................................................ -- $ 5,948,743 $ 28,027,048 ======================================================= Shares outstanding ........................................ -- 508,964 1,362,013 ======================================================= Net asset value ........................................... -- $ 11.69 $ 20.58 ======================================================= Investor A: Net assets ................................................ $ 1,287,004,796 $ 264,780,343 $ 2,076,841,265 ======================================================= Shares outstanding ........................................ 85,965,424 23,050,083 102,554,082 ======================================================= Net asset value ........................................... $ 14.97 $ 11.49 $ 20.25 ======================================================= Investor B: Net assets ................................................ $ 394,133,909 $ 111,777,444 $ 314,268,513 ======================================================= Shares outstanding ........................................ 27,788,718 10,300,764 16,360,312 ======================================================= Net asset value ........................................... $ 14.18 $ 10.85 $ 19.21 ======================================================= Investor C: Net assets ................................................ $ 1,370,658,946 $ 229,969,236 $ 925,873,765 ======================================================= Shares outstanding ........................................ 96,875,636 21,205,429 48,313,274 ======================================================= Net asset value ........................................... $ 14.15 $ 10.84 $ 19.16 ======================================================= Class R: Net assets ................................................ $ 131,182,548 $ 72,485,352 $ 166,969,213 ======================================================= Shares outstanding ........................................ 9,041,841 6,489,205 8,489,706 ======================================================= Net asset value ........................................... $ 14.51 $ 11.17 $ 19.67 ======================================================= * Identified cost of the Portfolios ......................... $ 3,431,251,996 $ 792,885,482 $ 3,929,584,531 ======================================================= ** The cost and unrealized appreciation (depreciation) of investments, with respect to BlackRock Large Cap Core Fund, as of April 30, 2007, as computed for federal income tax purposes, was as follows: Aggregate cost ............................................ $ 8,195,721 =============== Gross unrealized appreciation ............................. $ 9,331,367 =============== Gross unrealized depreciation ............................. -- =============== Net unrealized appreciation ............................... $ 9,331,367 =============== + Authorized shares -- Institutional ........................ 400,000,000 100,000,000 100,000,000 ======================================================= ++ Authorized shares -- Service .............................. -- 50,000,000 50,000,000 ======================================================= +++ Authorized shares -- Investor A ........................... 300,000,000 100,000,000 100,000,000 ======================================================= ++++ Authorized shares -- Investor B ........................... 200,000,000 200,000,000 200,000,000 ======================================================= +++++ Authorized shares -- Investor C ........................... 400,000,000 100,000,000 100,000,000 ======================================================= ++++++ Authorized shares -- Class R .............................. 200,000,000 200,000,000 200,000,000 ======================================================= @ Investments in companies considered to be an affiliate of BlackRock Large Cap Core Fund, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: -------------------------------------------------------------------------- Net Dividend Affiliate Activity Income -------------------------------------------------------------------------- Master S&P 500 Index Series -- -- -------------------------------------------------------------------------- See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 15 Statements of Operations BlackRock Large Cap Series Funds, Inc. BlackRock BlackRock BlackRock Large Large Large Cap Core Cap Growth Cap Value For the Six Months Ended April 30, 2007 (Unaudited) Fund Fund Fund ============================================================================================================================= Investment Income - ----------------------------------------------------------------------------------------------------------------------------- Net investment income allocated from the Portfolios: Dividends ......................................... $ 24,176,383 $ 3,738,515 $ 33,231,058 Securities lending -- net ......................... 410,784 61,261 297,296 Interest from affiliates .......................... 40,864 60,194 262,002 Expenses .......................................... (9,498,627) (2,367,858) (10,678,257) ------------------------------------------------------- Total income .......................................... 15,129,404 1,492,112 23,112,099 ------------------------------------------------------- ============================================================================================================================= Expenses - ----------------------------------------------------------------------------------------------------------------------------- Service and distribution fees -- Investor C ........... 6,266,960 1,022,667 4,149,297 Administration fees ................................... 4,873,560 1,072,038 5,236,537 Service and distribution fees -- Investor B ........... 2,085,668 542,546 1,547,844 Service fees -- Investor A ............................ 1,440,329 302,617 2,261,118 Transfer agent fees -- Investor C ..................... 759,031 198,990 621,176 Transfer agent fees -- Investor A ..................... 606,485 197,761 544,814 Transfer agent fees -- Institutional .................. 464,542 143,170 636,732 Service and distribution fees -- Class R .............. 295,940 154,359 352,879 Transfer agent fees -- Investor B ..................... 263,512 139,890 320,174 Printing and shareholder reports ...................... 216,402 37,759 127,554 Registration fees ..................................... 133,525 42,779 83,436 Transfer agent fees -- Class R ........................ 69,679 4,333 97,403 Transfer agent fees -- Service ........................ -- 67,191 32,763 Professional fees ..................................... 42,148 12,538 18,033 Service fees -- Service ............................... -- 6,305 31,685 Custodian fees ........................................ 1,814 1,167 4,538 Accounting services ................................... 81 -- -- Other ................................................. 15,928 10,615 9,265 ------------------------------------------------------- Total expenses ........................................ 17,535,604 3,956,725 16,075,248 ------------------------------------------------------- Investment income (loss) -- net ....................... (2,406,200) (2,464,613) 7,036,851 ------------------------------------------------------- ============================================================================================================================= Realized & Unrealized Gain (Loss) -- Net - ----------------------------------------------------------------------------------------------------------------------------- Realized gain allocated from the Portfolios -- net .... 192,078,371 24,600,282 104,293,559 Change in unrealized appreciation on: Allocations from the Portfolios ................... 157,718,351 63,205,986 309,761,905 Allocations from the Series ....................... 1,388,545 -- -- ------------------------------------------------------- Total change in unrealized appreciation -- net ........ 159,106,896 63,205,986 309,761,905 ------------------------------------------------------- Total realized and unrealized gain -- net ............. 351,185,267 87,806,268 414,055,464 ------------------------------------------------------- Net Increase in Net Assets Resulting from Operations .. $ 348,779,067 $ 85,341,655 $ 421,092,315 ======================================================= See Notes to Financial Statements. 16 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Statements of Changes in Net Assets BlackRock Large Cap Core Fund For the Six Months Ended For the April 30, Year Ended 2007 October 31, Increase (Decrease) in Net Assets: (Unaudited) 2006 ========================================================================================================================= Operations - ------------------------------------------------------------------------------------------------------------------------- Investment loss -- net ................................................ $ (2,406,200) $ (11,265,929) Realized gain -- net .................................................. 192,078,371 179,091,130 Change in unrealized appreciation -- net .............................. 159,106,896 276,027,847 ----------------------------------- Net increase in net assets resulting from operations .................. 348,779,067 443,853,048 ----------------------------------- ========================================================================================================================= Distributions to Shareholders - ------------------------------------------------------------------------------------------------------------------------- Realized gain -- net: Institutional ..................................................... (18,426,334) (57,857,569) Investor A ........................................................ (22,174,282) (62,093,983) Investor B ........................................................ (8,772,225) (35,312,162) Investor C ........................................................ (25,429,371) (70,619,981) Class R ........................................................... (2,318,352) (5,587,829) ----------------------------------- Net decrease in net assets resulting from distributions to shareholders (77,120,564) (231,471,524) ----------------------------------- ========================================================================================================================= Capital Share Transactions - ------------------------------------------------------------------------------------------------------------------------- Net increase in net assets derived from capital share transactions .... 241,208,581 1,029,911,537 ----------------------------------- ========================================================================================================================= Net Assets - ------------------------------------------------------------------------------------------------------------------------- Total increase in net assets .......................................... 512,867,084 1,242,293,061 Beginning of period ................................................... 3,703,037,523 2,460,744,462 ----------------------------------- End of period* ........................................................ $ 4,215,904,607 $ 3,703,037,523 =================================== * Accumulated investment loss -- net ................................ $ (2,451,743) $ (45,543) =================================== See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 17 Statements of Changes In Net Assets BlackRock Large Cap Growth Fund For the Six Months Ended For the April 30, Year Ended 2007 October 31, Increase (Decrease) in Net Assets: (Unaudited) 2006 ========================================================================================================================= Operations - ------------------------------------------------------------------------------------------------------------------------- Investment loss -- net ................................................ $ (2,464,613) $ (4,681,453) Realized gain -- net .................................................. 24,600,282 24,740,475 Change in unrealized appreciation -- net .............................. 63,205,986 44,967,618 ----------------------------------- Net increase in net assets resulting from operations .................. 85,341,655 65,026,640 ----------------------------------- ========================================================================================================================= Distributions to Shareholders - ------------------------------------------------------------------------------------------------------------------------- Realized gain -- net: Institutional ..................................................... (785,321) -- Service ........................................................... (17,414) -- Investor A ........................................................ (858,312) -- Investor B ........................................................ (412,496) -- Investor C ........................................................ (747,786) -- Class R ........................................................... (211,333) -- ----------------------------------- Net decrease in net assets resulting from distributions to shareholders (3,032,662) -- ----------------------------------- ========================================================================================================================= Capital Share Transactions - ------------------------------------------------------------------------------------------------------------------------- Net increase in net assets derived from capital share transactions .... 91,542,533 230,644,704 ----------------------------------- ========================================================================================================================= Net Assets - ------------------------------------------------------------------------------------------------------------------------- Total increase in net assets .......................................... 173,851,526 295,671,344 Beginning of period ................................................... 784,534,737 488,863,393 ----------------------------------- End of period* ........................................................ $ 958,386,263 $ 784,534,737 =================================== * Accumulated investment loss -- net ................................ $ (2,464,613) -- =================================== See Notes to Financial Statements. 18 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Statements of Changes in Net Assets BlackRock Large Cap Value Fund For the Six Months Ended For the April 30, Year Ended 2007 October 31, Increase (Decrease) in Net Assets: (Unaudited) 2006 ========================================================================================================================= Operations - ------------------------------------------------------------------------------------------------------------------------- Investment income (loss) -- net ....................................... $ 7,036,851 $ (3,327,782) Realized gain -- net .................................................. 104,293,559 116,307,468 Change in unrealized appreciation -- net .............................. 309,761,905 272,889,139 ----------------------------------- Net increase in net assets resulting from operations .................. 421,092,315 385,868,825 ----------------------------------- ========================================================================================================================= Dividends & Distributions to Shareholders - ------------------------------------------------------------------------------------------------------------------------- Investment income -- net: Institutional ..................................................... (1,176,425) -- Service ........................................................... (12,439) -- Investor A ........................................................ (1,464,394) -- Class R ........................................................... (46,949) -- Realized gain -- net: Institutional ..................................................... (15,987,640) (37,978,492) Service ........................................................... (384,970) (336) Investor A ........................................................ (26,904,386) (41,836,619) Investor B ........................................................ (5,064,024) (15,641,418) Investor C ........................................................ (12,884,055) (31,948,254) Class R ........................................................... (2,048,435) (4,331,376) ----------------------------------- Net decrease in net assets resulting from dividends and distributions to shareholders ..................................................... (65,973,717) (131,736,495) ----------------------------------- ========================================================================================================================= Capital Share Transactions - ------------------------------------------------------------------------------------------------------------------------- Net increase in net assets derived from capital share transactions .... 596,698,107 2,061,799,094 ----------------------------------- ========================================================================================================================= Net Assets - ------------------------------------------------------------------------------------------------------------------------- Total increase in net assets .......................................... 951,816,705 2,315,931,424 Beginning of period ................................................... 3,850,496,106 1,534,564,682 ----------------------------------- End of period* ........................................................ $ 4,802,312,811 $ 3,850,496,106 =================================== * Undistributed investment income -- net ............................ $ 4,336,644 -- =================================== See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 19 Financial Highlights BlackRock Large Cap Core Fund Institutional ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 14.20 $ 13.20 $ 11.28 $ 10.33 $ 8.31 $ 9.10 ----------------------------------------------------------------------- Investment income -- net*** ................ .03 .03 .04 .02 .01 .03 Realized and unrealized gain (loss) -- net . 1.29 2.10 1.97 .93 2.01 (.82) ----------------------------------------------------------------------- Total from investment operations ........... 1.32 2.13 2.01 .95 2.02 (.79) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.28) (1.13) (.09) -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 15.24 $ 14.20 $ 13.20 $ 11.28 $ 10.33 $ 8.31 ======================================================================= ================================================================================================================================== Total Investment Return**** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 9.45%+ 16.91% 17.94% 9.20% 24.31% (8.68%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. .86%* .89% .91% .93% .98% 1.04% ======================================================================= Expenses ................................... .86%* .89% .91% .93% .98% 1.04% ======================================================================= Investment income -- net ................... .41%* .19% .31% .17% .06% .33% ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $1,032,924 $ 922,301 $ 601,378 $415,647 $307,277 $214,953 ======================================================================= Portfolio turnover of the Fund ............. 0% 0% -- -- -- -- ======================================================================= Portfolio turnover of the Portfolio ........ 36.05% 87.67% 93.95% 135.48% 138.73% 150.18% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income. *** Based on average shares outstanding. **** Total investment returns exclude the effect of any sales charges. + Aggregate total investment return. See Notes to Financial Statements. 20 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights (continued) BlackRock Large Cap Growth Fund Institutional ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 10.63 $ 9.36 $ 8.36 $ 7.97 $ 6.44 $ 7.50 ----------------------------------------------------------------------- Investment loss -- net*** .................. --+ (.02) (.02) (.04) (.04) (.05) Realized and unrealized gain (loss) -- net . 1.12 1.29 1.02 .43 1.57 (1.01) ----------------------------------------------------------------------- Total from investment operations ........... 1.12 1.27 1.00 .39 1.53 (1.06) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.04) -- -- -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 11.71 $ 10.63 $ 9.36 $ 8.36 $ 7.97 $ 6.44 ======================================================================= ================================================================================================================================== Total Investment Return**** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 10.55%@ 13.57% 11.96% 4.89% 23.76% (14.13%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. .95%* 1.04% 1.08% 1.13% 1.22% 1.29% ======================================================================= Expenses ................................... .95%* 1.04% 1.08% 1.13% 1.22% 1.31% ======================================================================= Investment loss -- net ..................... (.05%)* (.22%) (.20%) (.45%) (.57%) (.63%) ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $ 273,425 $ 215,697 $ 128,667 $ 79,869 $ 53,163 $ 31,989 ======================================================================= Portfolio turnover of the Portfolio ........ 39.26% 116.77% 131.79% 164.94% 178.11% 177.46% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment loss. *** Based on average shares outstanding. **** Total investment returns exclude the effect of any sales charges. + Amount is less than $(.01) per share. @ Aggregate total investment return. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 21 Financial Highlights (continued) BlackRock Large Cap Value Fund Institutional ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 18.96 $ 17.12 $ 14.71 $ 12.89 $ 10.21 $ 10.67 ----------------------------------------------------------------------- Investment income -- net*** ................ .07 .06 .06 .07 .06 .05 Realized and unrealized gain (loss) -- net . 1.90 2.93 3.01 1.75 2.62 (.51) ----------------------------------------------------------------------- Total from investment operations ........... 1.97 2.99 3.07 1.82 2.68 (.46) ----------------------------------------------------------------------- Less dividends and distributions: Investment income -- net ............... (.02) -- -- -- -- -- Realized gain -- net ................... (.30) (1.15) (.66) -- -- -- ----------------------------------------------------------------------- Total dividends and distributions .......... (.32) (1.15) (.66) -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 20.61 $ 18.96 $ 17.12 $ 14.71 $ 12.89 $ 10.21 ======================================================================= ================================================================================================================================== Total Investment Return**** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 10.52%+ 18.06% 21.49% 14.12% 26.25% (4.31%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. .89%* 94% .98% 1.01% 1.03% 1.03% ======================================================================= Expenses ................................... .89%* .94% .98% 1.01% 1.03% 1.03% ======================================================================= Investment income -- net ................... .72%* .32% .35% .49% .51% .76% ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $1,290,333 $ 990,081 $ 446,172 $194,625 $ 92,736 $ 66,754 ======================================================================= Portfolio turnover of the Portfolio ........ 27.50% 70.86% 94.95% 127.59% 157.04% 136.92% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income. *** Based on average shares outstanding. **** Total investment returns exclude the effect of any sales charges. + Aggregate total investment return. See Notes to Financial Statements. 22 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights (continued) Service ----------------------------------------------------------- BlackRock Large Cap BlackRock Large Cap Growth Fund Value Fund ---------------------------- ---------------------------- For the For the Six Months For the Six Months For the Ended Period Ended Period April 30, Oct. 2, 2006+ April 30, Oct. 2, 2006+ The following per share data and ratios have been derived 2007 to Oct. 31, 2007 to Oct. 31, from information provided in the financial statements. (Unaudited) 2006 (Unaudited) 2006 ================================================================================================================================= Per Share Operating Performance - --------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ... $ 10.62 $ 10.18 $ 18.95 $ 18.62 ----------------------------------------------------------- Investment income (loss) -- net*** ..... (.02) (.01) 03 (.01) Realized and unrealized gain -- net .... 1.13 .45 1.91 .65 ----------------------------------------------------------- Total from investment operations ....... 1.11 .44 1.94 .64 ----------------------------------------------------------- Less dividends and distributions: Investment income -- net ............ -- -- (.01) -- Realized gain -- net ................ (.04) -- (.30) (.31) ----------------------------------------------------------- Total dividends and distributions ...... (.04) -- (.31) (.31) ----------------------------------------------------------- Net asset value, end of period ......... $ 11.69 $ 10.62 $ 20.58 $ 18.95 =========================================================== ================================================================================================================================= Total Investment Return - --------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ..... 10.47%@ 4.32%@ 10.34%@ 3.49%@ =========================================================== ================================================================================================================================= Ratios to Average Net Assets** - --------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ......... 1.25%* 1.36%* 1.28%* 1.35%* =========================================================== Expenses ............................... 1.25%* 1.36%* 1.28%* 1.35%* =========================================================== Investment income (loss) -- net ........ (.35%)* (1.14%)* .35%* (1.14%)* =========================================================== ================================================================================================================================= Supplemental Data - --------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) $ 5,949 $ 5,014 $ 28,027 $ 24,828 =========================================================== Portfolio turnover of the Portfolio .... 39.26% 116.77% 27.50% 70.86% =========================================================== * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income (loss). *** Based on average shares outstanding. + Commencement of operations. @ Aggregate total investment return. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 23 Financial Highlights (continued) BlackRock Large Cap Core Fund Investor A ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 13.97 $ 13.01 $ 11.15 $ 10.23 $ 8.25 $ 9.06 ----------------------------------------------------------------------- Investment income (loss) -- net*** ......... .01 (.01) .01 (.01) (.02) .01 Realized and unrealized gain (loss) -- net . 1.27 2.08 1.94 .93 2.00 (.82) ----------------------------------------------------------------------- Total from investment operations ........... 1.28 2.07 1.95 .92 1.98 (.81) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.28) (1.11) (.09) -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 14.97 $ 13.97 $ 13.01 $ 11.15 $ 10.23 $ 8.25 ======================================================================= ================================================================================================================================== Total Investment Return+ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 9.32%@ 16.61% 17.61% 8.99% 24.00% (8.94%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.11%* 1.14% 1.16% 1.18% 1.23% 1.28% ======================================================================= Expenses ................................... 1.11%* 1.14% 1.16% 1.18% 1.23% 1.28% ======================================================================= Investment income (loss) -- net ............ .14%* (.06%) .05% (.09%) (.21%) .10% ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $1,287,005 $1,028,585 $629,682 $392,896 $293,144 $136,552 ======================================================================= Portfolio turnover of the Fund ............. 0% 0% -- -- -- -- ======================================================================= Portfolio turnover of the Portfolio ........ 36.05% 87.67% 93.95% 135.48% 138.73% 150.18% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income (loss). *** Based on average shares outstanding. + Total investment returns exclude the effects of sales charges. @ Aggregate total investment return. See Notes to Financial Statements. 24 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights (continued) BlackRock Large Cap Growth Fund Investor A ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 10.44 $ 9.22 $ 8.26 $ 7.89 $ 6.39 $ 7.47 ----------------------------------------------------------------------- Investment loss -- net*** .................. (.02) (.06) (.04) (.06) (.05) (.06) Realized and unrealized gain (loss) -- net . 1.11 1.28 1.00 .43 1.55 (1.02) ----------------------------------------------------------------------- Total from investment operations ........... 1.09 1.22 .96 .37 1.50 (1.08) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.04) -- -- -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 11.49 $ 10.44 $ 9.22 $ 8.26 $ 7.89 $ 6.39 ======================================================================= ================================================================================================================================== Total Investment Return@ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 10.46%+ 13.23% 11.62% 4.69% 23.47% (14.46%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.24%* 1.29% 1.33% 1.38% 1.46% 1.54% ======================================================================= Expenses ................................... 1.24%* 1.29% 1.33% 1.38% 1.46% 1.56% ======================================================================= Investment loss -- net ..................... (.34%)* (.48%) (.46%) (.69%) (.81%) (.88%) ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $ 264,780 $ 218,017 $ 112,887 $ 64,539 $ 27,410 $ 15,874 ======================================================================= Portfolio turnover of the Portfolio ........ 39.26% 116.77% 131.79% 164.94% 178.11% 177.46% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income (loss). *** Based on average shares outstanding. + Aggregate total investment return. @ Total investment returns exclude the effects of sales charges. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 25 Financial Highlights (continued) BlackRock Large Cap Value Fund Investor A ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 18.64 $ 16.86 $ 14.53 $ 12.77 $ 10.14 $ 10.62 ----------------------------------------------------------------------- Investment income -- net*** ................ .05 .01 .02 .03 .03 .04 Realized and unrealized gain (loss) -- net . 1.88 2.89 2.97 1.73 2.60 (.52) ----------------------------------------------------------------------- Total from investment operations ........... 1.93 2.90 2.99 1.76 2.63 (.48) ----------------------------------------------------------------------- Less dividends and distributions: Investment income -- net ............... (.02) -- -- -- -- -- Realized gain -- net ................... (.30) (1.12) (.66) -- -- -- ----------------------------------------------------------------------- Total dividends and distributions .......... (.32) (1.12) (.66) -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 20.25 $ 18.64 $ 16.86 $ 14.53 $ 12.77 $ 10.14 ======================================================================= ================================================================================================================================== Total Investment Return+ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 10.45@ 17.78% 21.20% 13.78% 25.94% (4.52%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.08%* 1.19% 1.23% 1.26% 1.28% 1.28% ======================================================================= Expenses ................................... 1.08%* 1.19% 1.23% 1.26% 1.28% 1.28% ======================================================================= Investment income -- net ................... .53%* .05% .10% .21% .24% .49% ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $2,076,841 $1,652,442 $371,216 $161,867 $ 90,358 $ 46,020 ======================================================================= Portfolio turnover of the Portfolio ........ 27.50% 70.86% 94.95% 127.59% 157.04% 136.92% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income. *** Based on average shares outstanding. + Total investment returns exclude the effects of sales charges. @ Aggregate total investment return. See Notes to Financial Statements. 26 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights (continued) BlackRock Large Cap Core Fund Investor B ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 13.30 $ 12.43 $ 10.74 $ 9.93 $ 8.07 $ 8.93 ----------------------------------------------------------------------- Investment loss -- net*** .................. (.04) (.11) (.08) (.09) (.08) (.06) Realized and unrealized gain (loss) -- net . 1.20 1.99 1.86 .90 1.94 (.80) ----------------------------------------------------------------------- Total from investment operations ........... 1.16 1.88 1.78 .81 1.86 (.86) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.28) (1.01) (.09) -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 14.18 $ 13.30 $ 12.43 $ 10.74 $ 9.93 $ 8.07 ======================================================================= ================================================================================================================================== Total Investment Return+ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 8.88%@ 15.72% 16.69% 8.16% 23.05% (9.63%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.89%* 1.91% 1.93% 1.95% 2.00% 2.07% ======================================================================= Expenses ................................... 1.89%* 1.91% 1.93% 1.95% 2.00% 2.07% ======================================================================= Investment loss -- net ..................... (.59%)* (.83%) (.66%) (.86%) (.96%) (.64%) ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $ 394,134 $ 467,145 $ 446,242 $412,162 $389,598 $329,121 ======================================================================= Portfolio turnover of the Fund ............. 0% 0% -- -- -- -- ======================================================================= Portfolio turnover of the Portfolio ........ 36.05% 87.67% 93.95% 135.48% 138.73% 150.18% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment loss. *** Based on average shares outstanding. + Total investment returns exclude the effects of sales charges. @ Aggregate total investment return. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 27 Financial Highlights (continued) BlackRock Large Cap Growth Fund Investor B ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 9.91 $ 8.82 $ 7.96 $ 7.66 $ 6.25 $ 7.37 ----------------------------------------------------------------------- Investment loss -- net*** .................. (.06) (.12) (.10) (.12) (.10) (.12) Realized and unrealized gain (loss) -- net . 1.04 1.21 .96 .42 1.51 (1.00) ----------------------------------------------------------------------- Total from investment operations ........... .98 1.09 .86 .30 1.41 (1.12) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.04) -- -- -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 10.85 $ 9.91 $ 8.82 $ 7.96 $ 7.66 $ 6.25 ======================================================================= ================================================================================================================================== Total Investment Return@ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 9.90%+ 12.36% 10.80% 3.92% 22.56% (15.20%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 2.09%* 2.07% 2.11% 2.16% 2.27% 2.32% ======================================================================= Expenses ................................... 2.09%* 2.07% 2.11% 2.16% 2.27% 2.34% ======================================================================= Investment loss -- net ..................... (1.18%)* (1.25%) (1.15%) (1.48%) (1.61%) (1.66%) ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $ 111,777 $ 107,113 $ 95,593 $ 93,382 $100,683 $ 83,726 ======================================================================= Portfolio turnover of the Portfolio ........ 39.26% 116.77% 131.79% 164.94% 178.11% 177.46% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment loss. *** Based on average shares outstanding. + Aggregate total investment return. @ Total investment returns exclude the effects of sales charges. See Notes to Financial Statements. 28 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights (continued) BlackRock Large Cap Value Fund Investor B ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 17.76 $ 16.12 $ 14.02 $ 12.41 $ 9.93 $ 10.48 ----------------------------------------------------------------------- Investment loss -- net*** .................. (.03) (.11) (.09) (.07) (.05) (.03) Realized and unrealized gain (loss) -- net . 1.78 2.74 2.85 1.68 2.53 (.52) ----------------------------------------------------------------------- Total from investment operations ........... 1.75 2.63 2.76 1.61 2.48 (.55) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.30) (.99) (.66) -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 19.21 $ 17.76 $ 16.12 $ 14.02 $ 12.41 $ 9.93 ======================================================================= ================================================================================================================================== Total Investment Return+ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 9.96%@ 16.81% 20.29% 12.97% 24.97% (5.25%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.99%* 1.96% 2.00% 2.02% 2.05% 2.05% ======================================================================= Expenses ................................... 1.99%* 1.96% 2.00% 2.02% 2.05% 2.05% ======================================================================= Investment loss -- net ..................... (.34%)* (.67%) (.60%) (.53%) (.50%) (.28%) ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $ 314,269 $ 309,795 $ 261,345 $222,055 $202,190 $174,623 ======================================================================= Portfolio turnover of the Portfolio ........ 27.50% 70.86% 94.95% 127.59% 157.04% 136.92% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income (loss). *** Based on average shares outstanding. + Total investment returns exclude the effects of sales charges. @ Aggregate total investment return. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 29 Financial Highlights (continued) BlackRock Large Cap Core Fund Investor C ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 13.26 $ 12.43 $ 10.73 $ 9.93 $ 8.07 $ 8.93 ----------------------------------------------------------------------- Investment loss -- net*** .................. (.04) (.11) (.09) (.09) (.08) (.06) Realized and unrealized gain (loss) -- net . 1.21 1.97 1.88 .89 1.94 (.80) ----------------------------------------------------------------------- Total from investment operations ........... 1.17 1.86 1.79 .80 1.86 (.86) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.28) (1.03) (.09) -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 14.15 $ 13.26 $ 12.43 $ 10.73 $ 9.93 $ 8.07 ======================================================================= ================================================================================================================================== Total Investment Return+ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 8.98%@ 15.64% 16.80% 8.06% 23.05% (9.63%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.88%* 1.91% 1.94% 1.96% 2.01% 2.07% ======================================================================= Expenses ................................... 1.88%* 1.91% 1.94% 1.96% 2.01% 2.07% ======================================================================= Investment loss -- net ..................... (.62%)* (.84%) (.73%) (.86%) (.97%) (.66%) ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $1,370,659 $1,176,244 $737,063 $430,689 $250,491 $178,459 ======================================================================= Portfolio turnover of the Fund ............. 0% 0% -- -- -- -- ======================================================================= Portfolio turnover of the Portfolio ........ 36.05% 87.67% 93.95% 135.48% 138.73% 150.18% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment loss. *** Based on average shares outstanding. + Total investment returns exclude the effects of sales charges. @ Aggregate total investment return. See Notes to Financial Statements. 30 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights (continued) BlackRock Large Cap Growth Fund Investor C ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 9.90 $ 8.81 $ 7.95 $ 7.65 $ 6.25 $ 7.36 ----------------------------------------------------------------------- Investment loss -- net*** .................. (.06) (.12) (.10) (.12) (.10) (.12) Realized and unrealized gain (loss) -- net . 1.04 1.21 .96 .42 1.50 (.99) ----------------------------------------------------------------------- Total from investment operations ........... .98 1.09 .86 .30 1.40 (1.11) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.04) -- -- -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 10.84 $ 9.90 $ 8.81 $ 7.95 $ 7.65 $ 6.25 ======================================================================= ================================================================================================================================== Total Investment Return@ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 9.91%+ 12.37% 10.82% 3.92% 22.40% (15.08%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 2.02%* 2.06% 2.11% 2.16% 2.27% 2.33% ======================================================================= Expenses ................................... 2.02%* 2.06% 2.11% 2.16% 2.27% 2.35% ======================================================================= Investment loss -- net ..................... (1.12%)* (1.25%) (1.19%) (1.48%) (1.62%) (1.67%) ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $ 229,969 $ 185,337 $ 125,150 $ 94,969 $ 68,337 $ 52,872 ======================================================================= Portfolio turnover of the Portfolio ........ 39.26% 116.77% 131.79% 164.94% 178.11% 177.46% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment loss. *** Based on average shares outstanding. + Aggregate total investment return. @ Total investment returns exclude the effects of sales charges. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 31 Financial Highlights (continued) BlackRock Large Cap Value Fund Investor C ------------------------------------------------------------------------ For the Six Months Ended April 30, For the Year Ended October 31, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 17.72 $ 16.11 $ 14.01 $ 12.41 $ 9.93 $ 10.48 ----------------------------------------------------------------------- Investment loss -- net*** .................. (.03) (.12) (.10) (.07) (.05) (.03) Realized and unrealized gain (loss) -- net . 1.77 2.76 2.86 1.67 2.53 (.52) ----------------------------------------------------------------------- Total from investment operations ........... 1.74 2.64 2.76 1.60 2.48 (.55) ----------------------------------------------------------------------- Less distributions from realized gain -- net (.30) (1.03) (.66) -- -- -- ----------------------------------------------------------------------- Net asset value, end of period ............. $ 19.16 $ 17.72 $ 16.11 $ 14.01 $ 12.41 $ 9.93 ======================================================================= ================================================================================================================================== Total Investment Return+ - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 9.93%@ 16.89% 20.31% 12.89% 24.97% (5.25%) ======================================================================= ================================================================================================================================== Ratios to Average Net Assets** - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.93%* 1.96% 2.00% 2.03% 2.06% 2.05% ======================================================================= Expenses ................................... 1.93%* 1.96% 2.00% 2.03% 2.06% 2.05% ======================================================================= Investment loss -- net ..................... (.32%)* (.69%) (.65%) (.54%) (.51%) (.28%) ======================================================================= ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $ 925,874 $ 754,266 $ 409,937 $219,806 $129,456 $ 95,895 ======================================================================= Portfolio turnover of the Portfolio ........ 27.50% 70.86% 94.95% 127.59% 157.04% 136.92% ======================================================================= * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income (loss). *** Based on average shares outstanding. + Total investment returns exclude the effects of sales charges. @ Aggregate total investment return. See Notes to Financial Statements. 32 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights (continued) BlackRock Large Cap Core Fund Class R ---------------------------------------------------------------- For the Six Months For the Period Ended For the Year Ended January 3, April 30, October 31, 2003@ to The following per share data and ratios have been derived 2007 ---------------------------------- October 31, from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 =============================================================================================================================== Per Share Operating Performance - ------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 13.56 $ 12.68 $ 10.89 $ 10.02 $ 8.12 --------------------------------------------------------------- Investment loss -- net*** .................. (.01) (.04) (.03) (.03) (.05) Realized and unrealized gain -- net ........ 1.24 2.02 1.91 .90 1.95 --------------------------------------------------------------- Total from investment operations ........... 1.23 1.98 1.88 .87 1.90 --------------------------------------------------------------- Less distributions from realized gain -- net (.28) (1.10) (.09) -- -- --------------------------------------------------------------- Net asset value, end of period ............. $ 14.51 $ 13.56 $ 12.68 $ 10.89 $ 10.02 =============================================================== =============================================================================================================================== Total Investment Return - ------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 9.23%+ 16.29% 17.39% 8.68% 23.40%+ =============================================================== =============================================================================================================================== Ratios to Average Net Assets** - ------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.37%* 1.39% 1.42% 1.43% 1.48%* =============================================================== Expenses ................................... 1.37%* 1.39% 1.42% 1.43% 1.48%* =============================================================== Investment loss -- net ..................... (.12%)* (.32%) (.28%) (.32%) (.44%)* =============================================================== =============================================================================================================================== Supplemental Data - ------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $131,183 $108,762 $ 46,379 $ 15,160 $ 119 =============================================================== Portfolio turnover of the Fund ............. 0% 0% -- -- -- =============================================================== Portfolio turnover of the Portfolio ........ 36.05% 87.67% 93.95% 135.48% 138.73% =============================================================== * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment loss. *** Based on average shares outstanding. + Aggregate total investment return. @ Commencement of operations. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 33 Financial Highlights (continued) BlackRock Large Cap Growth Fund Class R ---------------------------------------------------------------- For the Six Months For the Period Ended For the Year Ended January 3, April 30, October 31, 2003@ to The following per share data and ratios have been derived 2007 ---------------------------------- October 31, from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 =============================================================================================================================== Per Share Operating Performance - ------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 10.17 $ 9.00 $ 8.08 $ 7.74 $ 6.16 --------------------------------------------------------------- Investment loss -- net*** .................. (.03) (.07) (.07) (.06) (.05) Realized and unrealized gain -- net ........ 1.07 1.24 .99 .40 1.63 --------------------------------------------------------------- Total from investment operations ........... 1.04 1.17 .92 .34 1.58 --------------------------------------------------------------- Less distributions from realized gain -- net (.04) -- -- -- -- --------------------------------------------------------------- Net asset value, end of period ............. $ 11.17 $ 10.17 $ 9.00 $ 8.08 $ 7.74 =============================================================== =============================================================================================================================== Total Investment Return - ------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 10.24%+ 13.00% 11.39% 4.39% 25.65%+ =============================================================== =============================================================================================================================== Ratios to Average Net Assets** - ------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.54%* 1.54% 1.58% 1.61% 1.72%* =============================================================== Expenses ................................... 1.54%* 1.54% 1.58% 1.61% 1.72%* =============================================================== Investment loss -- net ..................... (.65%)* (.73%) (.75%) (.95%) (.94%)* =============================================================== =============================================================================================================================== Supplemental Data - ------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $ 72,485 $ 53,356 $ 26,566 $ 11,304 $ 290 =============================================================== Portfolio turnover of the Portfolio ........ 39.26% 116.77% 131.79% 164.94% 178.11% =============================================================== * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment loss. *** Based on average shares outstanding. + Aggregate total investment return. @ Commencement of operations. See Notes to Financial Statements. 34 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights (concluded) BlackRock Large Cap Value Fund Class R ---------------------------------------------------------------- For the Six Months For the Period Ended For the Year Ended January 3, April 30, October 31, 2003@@ to The following per share data and ratios have been derived 2007 ---------------------------------- October 31, from information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 =============================================================================================================================== Per Share Operating Performance - ------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ....... $ 18.13 $ 16.46 $ 14.23 $ 12.54 $ 10.12 --------------------------------------------------------------- Investment income (loss) -- net*** ......... .02 (.03) (.03) --+ .01 Realized and unrealized gain -- net ........ 1.83 2.80 2.92 1.69 2.41 --------------------------------------------------------------- Total from investment operations ........... 1.85 2.77 2.89 1.69 2.42 --------------------------------------------------------------- Less dividends and distributions: Investment income -- net ................ (.01) -- -- -- -- Realized gain -- net .................... (.30) (1.10) (.66) -- -- --------------------------------------------------------------- Total dividends and distributions .......... (.31) (1.10) (.66) -- -- --------------------------------------------------------------- Net asset value, end of period ............. $ 19.67 $ 18.13 $ 16.46 $ 14.23 $ 12.54 =============================================================== =============================================================================================================================== Total Investment Return - ------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ......... 10.30%@ 17.41% 20.93% 13.48% 23.91%@ =============================================================== =============================================================================================================================== Ratios to Average Net Assets** - ------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ............. 1.41%* 1.45% 1.48% 1.53% 1.53%* =============================================================== Expenses ................................... 1.41%* 1.45% 1.48% 1.53% 1.53%* =============================================================== Investment income (loss) -- net ............ .17%* (.19%) (.19%) (.03%) .01%* =============================================================== =============================================================================================================================== Supplemental Data - ------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ... $166,969 $119,085 $ 45,894 $ 11,362 $ 12 =============================================================== Portfolio turnover of the Portfolio ........ 27.50% 70.86% 94.95% 127.59% 157.04% =============================================================== * Annualized. ** Includes the Fund's share of the Portfolio's allocated expenses and/or investment income (loss). *** Based on average shares outstanding. + Amount is less than $(.01) per share. @ Aggregate total investment return. @@ Commencement of operations. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 35 Notes to Financial Statements (Unaudited) BlackRock Large Cap Series Funds, Inc. 1. Significant Accounting Policies: BlackRock Large Cap Core Fund, BlackRock Large Cap Growth Fund and BlackRock Large Cap Value Fund (the "Funds" or individually as the "Fund"), constituting BlackRock Large Cap Series Funds, Inc., are registered under the Investment Company Act of 1940, as amended, as diversified, open-end investment companies. Each Fund seeks to achieve its investment objective by investing all, or a portion of, their assets in Master Large Cap Core Portfolio, Master Large Cap Growth Portfolio and Master Large Cap Value Portfolio (the "Portfolios" or individually as the "Portfolio"), respectively, constituting Master Large Cap Series Trust (the "Trust"), which have the same investment objective and strategies as the corresponding Funds. The value of the Funds' investment in the Portfolios reflects the Funds' proportionate interest in the net assets of the Portfolios. The performance of the Funds is directly affected by the performance of the Portfolios. The financial statements of the Portfolios, including the Schedules of Investments, are included elsewhere in this report and should be read in conjunction with the Funds' financial statements. The Funds' financial statements are prepared in conformity with U.S. generally accepted accounting principles, which may require the use of management accruals and estimates. Actual results may differ from these estimates. These unaudited financial statements reflect all adjustments, which are, in the opinion of management, necessary to present a fair statement of the results for the interim period. All such adjustments are of a normal, recurring nature. On April 30, 2007, the percentage of Master S&P 500 Index Series (the "Series") owned by BlackRock Large Cap Core Fund was 0.4% and the percentages of Master Large Cap Core Portfolio, Master Large Cap Growth Portfolio and Master Large Cap Value Portfolio owned by BlackRock Large Cap Core Fund, BlackRock Large Cap Growth Fund and BlackRock Large Cap Value Fund, were 96.0%, 95.8% and 98.4%, respectively. The Funds offer multiple classes of shares. Institutional and Service Shares are sold only to certain eligible investors. Investor A Shares are sold with a front-end sales charge. Shares of Investor B and Investor C may be subject to a contingent deferred sales charge. Class R Shares are sold only to certain retirement plans. All classes of shares have identical voting, dividend, liquidation and other rights and the same terms and conditions, except that Service, Investor A, Investor B, Investor C and Class R Shares bear certain expenses related to the shareholder servicing of such shares, and Investor B, Investor C and Class R Shares also bear certain expenses related to the distribution of such shares. Each class has exclusive voting rights with respect to matters relating to its shareholder servicing and distribution expenditures (except that Investor B shareholders may vote on certain changes to the Investor A distribution plan). Income, expenses (other than expenses attributable to a specific class) and realized and unrealized gains and losses are allocated daily to each class based on its relative net assets. The following is a summary of significant accounting policies followed by the Funds. (a) Valuation of investments -- Each Fund records its investment at fair value. Valuation of securities held by the Portfolio is discussed in Note 1(a) of the Portfolios' Notes to Financial Statements, which are included elsewhere in this report. (b) Investment income and expenses -- Each Fund records daily its proportionate share of the Portfolio's income, expenses and realized and unrealized gains and losses. In addition, each Fund accrues its own expenses. (c) Income taxes -- It is each Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable income to shareholders. Therefore, no federal income tax provision is required. Under the applicable foreign tax law, withholding taxes may be imposed on interest, dividends and capital gains at various rates. (d) Prepaid registration fees -- Prepaid registration fees are charged to expense as the related shares are issued. (e) Dividends and distributions -- Dividends and distributions paid by each Fund are recorded on the ex-dividend dates. (f) Investment transactions -- Investment transactions in each Portfolio are accounted for on a trade date basis. (g) Recent accounting pronouncements -- In July 2006, the Financial Accounting Standards Board ("FASB") issued Interpretation No. 48 ("FIN 48"), "Accounting for Uncertainty in Income Taxes -- an interpretation of FASB Statement No. 109." FIN 48 prescribes the minimum recognition threshold a tax position must meet in connection with accounting for uncertainties in income tax positions taken or expected to be taken by an entity, including mutual funds, before being measured and recognized in the financial statements. Adoption of FIN 48 is required for the last net asset value calculation in the first required financial statement reporting period for fiscal years beginning after December 15, 2006. The impact on each Fund's financial statements, if any, is currently being assessed. 36 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Notes to Financial Statements (continued) BlackRock Large Cap Series Funds, Inc. In September 2006, "Statement of Financial Accounting Standards No. 157, Fair Value Measurements" ("FAS 157"), was issued and is effective for fiscal years beginning after November 15, 2007. FAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. At this time, management is evaluating the implications of FAS 157 and its impact on each Fund's financial statements, if any, has not been determined. In addition, in February 2007, FASB issued "Statement of Financial Accounting Standards No. 159, The Fair Value Option for Financial Assets and Financial Liabilities" ("FAS 159"), which is effective for fiscal years beginning after November 15, 2007. Early adoption is permitted as of the beginning of a fiscal year that begins on or before November 15, 2007, provided the entity also elects to apply the provisions of FAS 157. FAS 159 permits entities to choose to measure many financial instruments and certain other items at fair value that are not currently required to be measured at fair value. FAS 159 also establishes presentation and disclosure requirements designed to facilitate comparisons between entities that choose different measurement attributes for similar types of assets and liabilities. At this time, management is evaluating the implications of FAS 159 and its impact on each Fund's financial statements, if any, has not been determined. 2. Transactions with Affiliates: Each Fund has entered into an Administration Agreement with BlackRock Advisors, LLC ("BlackRock"), an indirect, wholly owned subsidiary of BlackRock, Inc. Each Fund pays a monthly fee at an annual rate of .25% of the Fund's average daily net assets for the performance of administrative services (other than investment advice and related portfolio activities) necessary for the operation of the Fund. Prior to September 29, 2006, Fund Asset Management, L.P. acted as each Fund's administrator and was compensated at the same fee rate. Each Fund has also entered into separate Distribution Agreements and Distribution Plans with FAM Distributors, Inc. ("FAMD") and BlackRock Distributors, Inc. and its affiliates ("BDI") (collectively, the "Distributor"). FAMD is a wholly owned subsidiary of Merrill Lynch Group, Inc., and BDI is an affiliate of BlackRock, Inc. Merrill Lynch and The PNC Financial Services Group, Inc. ("PNC") are the principal owners of BlackRock, Inc. Pursuant to the Distribution Plans adopted by the Funds in accordance with Rule 12b-1 under the Investment Company Act of 1940, the Funds pay each Distributor ongoing service and distribution fees. The fees are accrued daily and paid monthly at annual rates based upon the average daily net assets of the shares as follows: - -------------------------------------------------------------------------------- Service Distribution Fee Fee - -------------------------------------------------------------------------------- Service ........................................ .25% -- Investor A ..................................... .25% -- Investor B ..................................... .25% .75% Investor C ..................................... .25% .75% Class R ........................................ .25% .25% - -------------------------------------------------------------------------------- Pursuant to sub-agreements with each Distributor, broker-dealers, including Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), a wholly owned subsidiary of Merrill Lynch & Co., Inc. and an affiliate of each Distributor, provide shareholder servicing and distribution services to the Funds. The ongoing service fee compensates the Distributor and each broker-dealer (including MLPF&S) for providing shareholder servicing to Service, Investor A, Investor B, Investor C and Class R shareholders. The ongoing distribution fee compensates each Distributor and MLPF&S for providing shareholder servicing and distribution-related services to Investor B, Investor C and Class R shareholders. For the six months ended April 30, 2007, FAMD and BDI earned underwriting discounts and MLPF&S was paid dealer concessions on sales of the Funds' Institutional and Investor A Shares as follows: - -------------------------------------------------------------------------------- FAMD MLPF&S BDI - -------------------------------------------------------------------------------- BlackRock Large Cap Core Fund Investor A ................. $ 80,136 $1,002,122 $ 916 - -------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund Investor A ................. $ 9,968 $ 120,135 $ 2,875 - -------------------------------------------------------------------------------- BlackRock Large Cap Value Fund Investor A ................. $ 32,043 $ 403,011 $ 16,051 - -------------------------------------------------------------------------------- For the six months ended April 30, 2007, the Distributors paid MLPF&S contingent deferred sales charges relating to transactions in Investor B and Investor C Shares as follows: - -------------------------------------------------------------------------------- Investor B Investor C - -------------------------------------------------------------------------------- BlackRock Large Cap Core Fund ..................... $124,254 $ 76,603 BlackRock Large Cap Growth Fund ................... $ 28,238 $ 9,849 BlackRock Large Cap Value Fund .................... $ 54,806 $ 59,751 - -------------------------------------------------------------------------------- BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 37 Notes to Financial Statements (continued) BlackRock Large Cap Series Funds, Inc. In addition, the Distributors paid MLPF&S contingent deferred sales charges relating to transactions subject to front-end sales charge waivers for Investor A Shares as follows: - -------------------------------------------------------------------------------- Investor A - -------------------------------------------------------------------------------- BlackRock Large Cap Core Fund .................................... $4,163 BlackRock Large Cap Growth Fund .................................. $ 176 BlackRock Large Cap Value Fund ................................... $ 900 - -------------------------------------------------------------------------------- Furthermore, the Distributors paid BDI contingent deferred sales charges relating to transactions in Investor B and Investor C Shares as follows: - -------------------------------------------------------------------------------- Investor B Investor C - -------------------------------------------------------------------------------- BlackRock Large Cap Core Fund ....................... $179 $169 BlackRock Large Cap Growth Fund ..................... $907 $115 BlackRock Large Cap Value Fund ...................... $978 $ 24 - -------------------------------------------------------------------------------- The Manager maintains a call center, which is responsible for providing certain shareholder services to each Fund, such as responding to shareholder inquiries and processing transactions based upon instructions from shareholders with respect to the subscription and redemption of Fund shares. During the six months ended April 30, 2007, the following amounts have been accrued by each Fund to reimburse the Manager for costs incurred running the call center, which are a component of the transfer agent fees in the accompanying Statements of Operations. - -------------------------------------------------------------------------------- BlackRock Large Cap Core Fund Call Center Fees - -------------------------------------------------------------------------------- Institutional ................................................ $ 3,633 Investor A ................................................... $ 9,317 Investor B ................................................... $ 6,447 Investor C ................................................... $11,041 Class R ...................................................... $ 778 - -------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund - -------------------------------------------------------------------------------- Institutional ................................................ $ 1,111 Service ...................................................... $ 386 Investor A ................................................... $ 3,453 Investor B ................................................... $ 2,393 Investor C ................................................... $ 2,211 Class R ...................................................... $ 365 - -------------------------------------------------------------------------------- BlackRock Large Cap Value Fund - -------------------------------------------------------------------------------- Institutional ................................................ $13,833 Service ...................................................... $ 2,302 Investor A ................................................... $43,102 Investor B ................................................... $10,021 Investor C ................................................... $ 5,777 Class R ...................................................... $ 840 - -------------------------------------------------------------------------------- PFPC Inc., an indirect, wholly owned subsidiary of PNC and an affiliate of BlackRock, is each Fund's transfer agent. Certain officers and/or directors of the Funds are officers and/or directors of BlackRock, Inc. or its affiliates. 3. Investments: With respect to BlackRock Large Cap Core Fund, there were no purchases or sales of investment in the Series for the six months ended April 30, 2007. 4. Capital Share Transactions: BlackRock Large Cap Core Fund Net increase in net assets derived from capital share transactions was $241,208,581 and $1,029,911,537 for the six months ended April 30, 2007 and the year ended October 31, 2006, respectively. Transactions in capital shares for each class were as follows: - ------------------------------------------------------------------------------- BlackRock Large Cap Core Fund Institutional Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 9,061,281 $ 132,162,618 Shares issued to shareholders in reinvestment of distributions ........ 1,053,027 15,047,596 --------------------------------- Total issued ........................... 10,114,308 147,210,214 Shares redeemed ........................ (7,308,805) (105,903,139) --------------------------------- Net increase ........................... 2,805,503 $ 41,307,075 ================================= - ------------------------------------------------------------------------------- Institutional Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 26,968,302 $ 371,823,883 Shares issued resulting from reorganization .................. 1,384,811 18,375,947 Shares issued resulting from reinvestment of distributions ........ 3,426,399 45,621,028 --------------------------------- Total issued ........................... 31,779,512 435,820,858 Shares redeemed ........................ (12,354,857) (169,730,505) --------------------------------- Net increase ........................... 19,424,655 $ 266,090,353 ================================= - ------------------------------------------------------------------------------- Investor A Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 18,097,528 $ 258,291,164 Shares issued to shareholders in reinvestment of distributions ........ 1,389,359 19,520,763 --------------------------------- Total issued ........................... 19,486,884 277,811,927 Shares redeemed ........................ (7,162,040) (102,741,468) --------------------------------- Net increase ........................... 12,324,844 $ 175,070,459 ================================= - ------------------------------------------------------------------------------- Investor A Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 30,806,771 $ 417,178,270 Shares issued resulting from reorganization .................. 840,871 10,983,495 Automatic conversion of shares ......... 2,008,639 27,051,237 Shares issued to shareholders in reinvestment of distributions ........ 4,384,870 57,558,522 --------------------------------- Total issued ........................... 38,041,151 512,771,524 Shares redeemed ........................ (12,782,750) (172,781,856) --------------------------------- Net increase ........................... 25,258,401 $ 339,989,668 ================================= 38 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Notes to Financial Statements (continued) BlackRock Large Cap Series Funds, Inc. - ------------------------------------------------------------------------------- BlackRock Large Cap Core Fund (continued) - ------------------------------------------------------------------------------- Investor B Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 2,001,346 $ 27,207,745 Shares issued to shareholders in reinvestment of distributions ........ 589,021 7,857,142 --------------------------------- Total issued ........................... 2,590,367 35,064,887 Shares redeemed ........................ (9,932,551) (134,832,732) --------------------------------- Net decrease ........................... (7,342,184) $ (99,767,845) ================================= - ------------------------------------------------------------------------------- Investor B Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 5,931,881 $ 76,856,340 Shares issued resulting from reorganization .................. 1,421,696 17,703,160 Shares issued to shareholders in reinvestment of distributions ........ 2,469,644 31,026,897 --------------------------------- Total issued ........................... 9,823,221 125,586,397 --------------------------------- Automatic conversion of shares ......... (2,100,430) (27,051,237) Shares redeemed ........................ (8,481,854) (109,620,287) --------------------------------- Total redeemed ......................... (10,582,284) (136,671,524) --------------------------------- Net decrease ........................... (759,063) $ (11,085,127) ================================= - ------------------------------------------------------------------------------- Investor C Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 13,788,047 $ 186,826,795 Shares issued to shareholders in reinvestment of distributions ........ 1,781,719 23,732,239 --------------------------------- Total issued ........................... 15,569,766 210,559,034 Shares redeemed ........................ (7,370,233) (99,960,921) --------------------------------- Net increase ........................... 8,199,533 $ 110,598,113 ================================= - ------------------------------------------------------------------------------- Investor C Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 34,794,418 $ 449,644,683 Shares issued resulting from reorganization .................. 1,340,290 16,648,081 Shares issued to shareholders in reinvestment of distributions ........ 5,198,202 65,153,921 --------------------------------- Total issued ........................... 41,332,910 531,446,685 Shares redeemed ........................ (11,945,575) (153,906,063) --------------------------------- Net increase ........................... 29,387,335 $ 377,540,622 ================================= - ------------------------------------------------------------------------------- Class R Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 2,388,917 $ 32,925,996 Shares issued to shareholders in reinvestment of distributions ........ 169,798 2,314,202 --------------------------------- Total issued ........................... 2,558,715 35,240,198 Shares redeemed ........................ (1,536,738) (21,239,419) --------------------------------- Net increase ........................... 1,021,977 $ 14,000,779 ================================= - ------------------------------------------------------------------------------- Class R Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 6,430,000 $ 84,582,630 Shares issued resulting from reorganization ....................... 175 2,220 Shares issued to shareholders in of distributions ....................... 436,970 5,582,992 --------------------------------- Total issued ........................... 6,867,145 90,167,842 Shares redeemed ........................ (2,503,760) (32,791,821) --------------------------------- Net increase ........................... 4,363,385 $ 57,376,021 ================================= BlackRock Large Cap Growth Fund Net increase in net assets derived from capital share trans actions was $91,542,533 and $230,644,704 for the six months ended April 30, 2007 and the year ended October 31, 2006, respectively. Transactions in capital shares for each class were as follows: - ------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund - ------------------------------------------------------------------------------- Institutional Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 7,031,432 $ 77,796,834 Shares issued to shareholders in reinvestment of distributions ........ 62,923 683,337 --------------------------------- Total issued ........................... 7,094,355 78,480,171 Shares redeemed ........................ (4,043,082) (44,138,866) --------------------------------- Net increase ........................... 3,051,273 $ 34,341,305 ================================= - ------------------------------------------------------------------------------- Institutional Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 11,925,860 $ 124,059,637 Shares issued resulting from reorganization ....................... 1,465,913 15,537,208 --------------------------------- Total issued ........................... 13,391,773 139,596,845 Shares redeemed ........................ (6,839,045) (69,050,639) --------------------------------- Net increase ........................... 6,552,728 $ 70,546,206 ================================= - ------------------------------------------------------------------------------- Service Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 145,027 $ 1,613,911 Shares issued to shareholders in reinvestment of distributions ........ 1,438 15,600 --------------------------------- Total issued ........................... 146,465 1,629,511 Shares redeemed ........................ (109,541) (1,188,007) --------------------------------- Net increase ........................... 36,924 $ 441,504 ================================= BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 39 Notes to Financial Statements (continued) BlackRock Large Cap Series Funds, Inc. - ------------------------------------------------------------------------------- BlackRock Large Cap Growth Fund (continued) - ------------------------------------------------------------------------------- Service Shares for the Period October 2, 2006+ to Dollar October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 4,352 $ 45,215 Shares issued resulting from reorganization ....................... 478,968 5,075,631 --------------------------------- Total issued ........................... 483,320 5,120,846 Shares redeemed ........................ (11,280) (119,891) --------------------------------- Net increase ........................... 472,040 $ 5,000,955 ================================= + Commencement of operations. - ------------------------------------------------------------------------------- Investor A Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 6,193,546 $ 67,103,264 Shares issued to shareholders in reinvestment of distributions ........ 74,875 798,915 --------------------------------- Total issued ........................... 6,268,421 67,902,179 Shares redeemed ........................ (4,101,583) (44,485,890) --------------------------------- Net increase ........................... 2,166,838 $ 23,416,289 ================================= - ------------------------------------------------------------------------------- Investor A Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 9,836,838 $ 99,767,111 Shares issued resulting from reorganization ....................... 1,545,391 16,095,245 Automatic conversion of shares ......... 1,109,567 11,105,497 --------------------------------- Total issued ........................... 12,491,796 126,967,853 Shares redeemed ........................ (3,852,495) (38,671,848) --------------------------------- Net increase ........................... 8,639,301 $ 88,296,005 ================================= - ------------------------------------------------------------------------------- Investor B Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 1,570,106 $ 16,169,888 Shares issued to shareholders in reinvestment of distributions ........ 37,261 376,698 --------------------------------- Total issued ........................... 1,607,367 16,546,586 Shares redeemed ........................ (2,120,279) (21,847,951) --------------------------------- Net decrease ........................... (512,912) $ (5,301,365) ================================= - ------------------------------------------------------------------------------- Investor B Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 3,316,837 $ 32,021,170 Shares issued resulting from reorganization ....................... 831,350 8,218,730 --------------------------------- Total issued ........................... 4,148,187 40,239,900 --------------------------------- Automatic conversion of shares ......... (1,164,369) (11,105,497) Shares redeemed ........................ (3,013,347) (28,784,814) --------------------------------- Total redeemed ......................... (4,177,716) (39,890,311) --------------------------------- Net increase (decrease) ................ (29,529) $ 349,589 ================================= - ------------------------------------------------------------------------------- Investor C Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 4,620,383 $ 47,681,823 Shares issued to shareholders in reinvestment of distributions ........ 69,949 706,480 --------------------------------- Total issued ........................... 4,690,332 48,388,303 Shares redeemed ........................ (2,212,898) (22,861,903) --------------------------------- Net increase ........................... 2,477,434 $ 25,526,400 ================================= - ------------------------------------------------------------------------------- Investor C Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 7,848,897 $ 75,488,161 Shares issued resulting from reorganization .................. 253,461 2,503,179 --------------------------------- Total issued ........................... 8,102,358 77,991,340 Shares redeemed ........................ (3,584,176) (34,288,057) --------------------------------- Net increase ........................... 4,518,182 $ 43,703,283 ================================= - ------------------------------------------------------------------------------- Class R Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 2,248,624 $ 23,745,757 Shares issued to shareholders in reinvestment of distributions ........ 20,340 211,332 --------------------------------- Total issued ........................... 2,268,964 23,957,089 Shares redeemed ........................ (1,027,120) (10,838,689) --------------------------------- Net increase ........................... 1,241,844 $ 13,118,400 ================================= - ------------------------------------------------------------------------------- Class R Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 3,772,105 $ 37,223,992 Shares redeemed ........................ (1,475,670) (14,475,326) --------------------------------- Net increase ........................... 2,296,435 $ 22,748,666 ================================= BlackRock Large Cap Value Fund Net increase in net assets derived from capital share transactions was $596,698,107 and $2,061,799,094 for the six months ended April 30, 2007 and the year ended October 31, 2006, respectively. 40 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Notes to Financial Statements (continued) BlackRock Large Cap Series Funds, Inc. Transcations in capital shares for each class were as follows: - ------------------------------------------------------------------------------- BlackRock Large Cap Value Fund - ------------------------------------------------------------------------------- Institutional Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 19,675,163 $ 384,220,442 Shares issued to shareholders in reinvestment of dividends and distributions ...................... 1,401,216 26,402,672 --------------------------------- Total issued ........................... 21,076,379 410,623,114 Shares redeemed ........................ (10,705,235) (207,227,217) --------------------------------- Net increase ........................... 10,371,144 $ 203,395,897 ================================= - ------------------------------------------------------------------------------- Institutional Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 33,588,560 $ 609,452,743 Shares issued resulting from reorganization ....................... 5,326,567 100,150,108 Shares issued to shareholders in reinvestment of distributions ........ 1,393,347 24,275,076 --------------------------------- Total issued ........................... 40,308,474 733,877,927 Shares redeemed ........................ (14,144,837) (258,308,351) --------------------------------- Net increase ........................... 26,163,637 $ 475,569,576 ================================= - ------------------------------------------------------------------------------- Service Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 207,183 $ 4,063,325 Shares issued to shareholders in reinvestment of dividends and distributions ...................... 19,010 363,282 --------------------------------- Total issued ........................... 226,193 4,426,607 Shares redeemed ........................ (174,343) (3,379,821) --------------------------------- Net increase ........................... 51,850 $ 1,046,786 ================================= - ------------------------------------------------------------------------------- Service Shares for the Period October 2, 2006+ to Dollar October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 4,292 $ 79,918 Shares issued resulting from reorganization ....................... 1,323,427 24,877,778 --------------------------------- Total issued ........................... 1,327,719 24,957,696 Shares redeemed ........................ (17,556) (333,427) --------------------------------- Net increase ........................... 1,310,163 $ 24,624,269 ================================= + Commencement of operations. - ------------------------------------------------------------------------------- Investor A Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 21,959,010 $ 426,634,083 Shares issued to shareholders in reinvestment of dividends and distributions ...................... 1,792,473 33,458,687 --------------------------------- Total issued ........................... 23,751,483 460,092,770 Shares redeemed ........................ (9,836,518) (188,243,512) --------------------------------- Net increase ........................... 13,914,965 $ 271,849,258 ================================= - ------------------------------------------------------------------------------- Investor A Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 63,546,739 $1,124,469,647 Shares issued resulting from reorganization ....................... 9,040,105 167,160,591 Automatic conversion of shares ......... 1,328,996 23,420,477 Shares issued to shareholders in reinvestment of distributions ........ 1,729,174 30,341,226 --------------------------------- Total issued ........................... 75,645,014 1,345,391,941 Shares redeemed ........................ (9,018,321) (161,753,348) --------------------------------- Net increase ........................... 66,626,693 $1,183,638,593 ================================= - ------------------------------------------------------------------------------- Investor B Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 1,321,385 $ 24,398,255 Shares issued to shareholders in reinvestment of distributions ........ 499,665 8,806,469 --------------------------------- Total issued ........................... 1,821,050 33,204,724 Shares redeemed ........................ (2,902,332) (52,956,131) --------------------------------- Net decrease ........................... (1,081,280) $ (19,751,407) ================================= - ------------------------------------------------------------------------------- Investor B Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 4,117,800 $ 70,080,431 Shares issued resulting from reorganization ....................... 2,302,755 40,586,052 Shares issued to shareholders in reinvestment of distributions ........ 614,319 10,065,944 --------------------------------- Total issued ........................... 7,034,874 120,732,427 --------------------------------- Automatic conversion of shares ......... (1,388,752) (23,420,477) Shares redeemed ........................ (4,421,507) (75,511,208) --------------------------------- Total redeemed ......................... (5,810,259) (98,931,685) --------------------------------- Net increase ........................... 1,224,615 $ 21,800,742 ================================= - ------------------------------------------------------------------------------- Investor C Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 8,420,219 $ 154,226,035 Shares issued to shareholders in reinvestment of distributions ........ 1,353,409 23,781,315 --------------------------------- Total issued ........................... 9,773,628 178,007,350 Shares redeemed ........................ (4,036,716) (73,662,419) --------------------------------- Net increase ........................... 5,736,912 $ 104,344,931 ================================= - ------------------------------------------------------------------------------- Investor C Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 21,100,602 $ 358,619,070 Shares issued resulting from reorganization ....................... 629,971 11,074,264 Shares issued to shareholders in reinvestment of distributions ........ 1,122,091 18,345,447 --------------------------------- Total issued ........................... 22,852,664 388,038,781 Shares redeemed ........................ (5,721,171) (97,483,736) --------------------------------- Net increase ........................... 17,131,493 $ 290,555,045 ================================= BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 41 Notes to Financial Statements (concluded) BlackRock Large Cap Series Funds, Inc. - ------------------------------------------------------------------------------- BlackRock Large Cap Value Fund (concluded) - ------------------------------------------------------------------------------- Class R Shares for the Six Dollar Months Ended April 30, 2007 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 2,760,366 $ 51,610,350 Shares issued to shareholders in reinvestment of dividends and distributions ...................... 219,465 3,950,056 --------------------------------- Total issued ........................... 2,979,831 55,560,406 Shares redeemed ........................ (1,057,131) (19,747,764) --------------------------------- Net increase ........................... 1,922,700 $ 35,812,642 ================================= - ------------------------------------------------------------------------------- Class R Shares for the Year Dollar Ended October 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold ............................ 5,076,346 $ 88,344,587 Shares issued to shareholders in reinvestment of distributions ........ 148,464 2,474,052 --------------------------------- Total issued ........................... 5,224,810 90,818,639 Shares redeemed ........................ (1,446,630) (25,207,770) --------------------------------- Net increase ........................... 3,778,180 $ 65,610,869 ================================= 5. Capital Loss Carryforward: BlackRock Large Cap Core Fund On October 31, 2006, the Fund had a net capital loss carryforward of $70,935,568, of which $27,053,742 expires in 2008, $26,081,669 expires in 2009, $14,800,383 expires in 2010 and $2,999,774 expires in 2011. This amount will be available to offset like amounts of any future taxable gains. BlackRock Large Cap Growth Fund On October 31, 2006, the Fund had a net capital loss carryforward of $51,746,631, of which $2,612,498 expires in 2007, $16,739,229 expires in 2008, $6,082,996 expires in 2009 and $26,311,908 expires in 2010. This amount will be available to offset like amounts of any future taxable gains. BlackRock Large Cap Value Fund On October 31, 2006, the Fund had a net capital loss carryforward of $67,982, all of which expires in 2010. This amount will be available to offset like amounts of any future taxable gains. 42 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Portfolio Information as of April 30, 2007 Master Large Cap Series Trust Sector Representation Percent of Master Large Cap Core Portfolio Total Investments - -------------------------------------------------------------------------------- Health Care ..................................................... 17.7% Information Technology .......................................... 16.2 Consumer Discretionary .......................................... 15.1 Financial ....................................................... 9.7 Energy .......................................................... 9.0 Industrials ..................................................... 8.5 Materials ....................................................... 4.3 Consumer Staples ................................................ 2.6 Telecommunication Services ...................................... 1.5 Other* .......................................................... 15.4 - -------------------------------------------------------------------------------- Percent of Master Large Cap Growth Portfolio Total Investments - -------------------------------------------------------------------------------- Information Technology .......................................... 25.4% Health Care ..................................................... 17.4 Consumer Discretionary .......................................... 17.1 Industrials ..................................................... 10.9 Materials ....................................................... 6.0 Financials ...................................................... 5.1 Energy .......................................................... 4.0 Consumer Staples ................................................ 2.0 Other* .......................................................... 12.1 - -------------------------------------------------------------------------------- Percent of Master Large Cap Value Portfolio Total Investments - -------------------------------------------------------------------------------- Financials ...................................................... 20.8% Energy .......................................................... 12.8 Information Technology .......................................... 11.2 Health Care ..................................................... 10.0 Consumer Discretionary .......................................... 9.1 Industrials ..................................................... 7.9 Materials ....................................................... 4.7 Consumer Staples ................................................ 4.1 Telecommunication Services ...................................... 2.0 Utilities ....................................................... 1.2 Other* .......................................................... 16.2 - -------------------------------------------------------------------------------- * Includes portfolio holdings in short-term investments. For Portfolio compliance purposes, the Portfolio's sector and industry classifications refer to any one or more of the sector and industry sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Portfolio management. This definition may not apply for purposes of this report, which may combine such sector and industry sub-classifications for reporting ease. Five Largest Industries Percent of Master Large Cap Core Portfolio Net Assets - -------------------------------------------------------------------------------- Health Care Providers & Services ................................ 11.7% Oil, Gas & Consumable Fuels ..................................... 10.6 Specialty Retail ................................................ 6.6 Software ........................................................ 5.7 Computer & Peripherals .......................................... 5.6 - -------------------------------------------------------------------------------- Percent of Master Large Cap Growth Portfolio Net Assets - -------------------------------------------------------------------------------- Health Care Providers & Services ................................ 10.7% Software ........................................................ 9.5 Specialty Retail ................................................ 6.9 Computers & Peripherals ......................................... 6.8 Multiline Retail ................................................ 5.2 - -------------------------------------------------------------------------------- Percent of Master Large Cap Value Portfolio Net Assets - -------------------------------------------------------------------------------- Oil, Gas & Consumable Fuels ..................................... 15.2% Insurance ....................................................... 9.2 Diversified Financial Services .................................. 8.8 Health Care Providers & Services ................................ 7.8 Capital Markets ................................................. 5.8 - -------------------------------------------------------------------------------- BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 43 Portfolio Information as of April 30, 2007 (concluded) Master Large Cap Series Trust Ten Largest Equity Holdings Percent of Master Large Cap Core Portfolio Net Assets - -------------------------------------------------------------------------------- Exxon Mobil Corp. ............................................... 4.0% JPMorgan Chase & Co. ............................................ 2.2 Chevron Corp. ................................................... 2.1 International Business Machines Corp. ........................... 2.1 Cisco Systems, Inc. ............................................. 2.1 Hewlett-Packard Co. ............................................. 1.8 Morgan Stanley .................................................. 1.6 The Goldman Sachs Group, Inc. ................................... 1.6 General Electric Co. ............................................ 1.6 UnitedHealth Group, Inc. ........................................ 1.5 - -------------------------------------------------------------------------------- Percent of Master Large Cap Growth Portfolio Net Assets - -------------------------------------------------------------------------------- Cisco Systems, Inc. ............................................. 3.2% International Business Machines Corp. ........................... 3.0 Oracle Corp. .................................................... 2.0 UnitedHealth Group, Inc. ........................................ 2.0 Hewlett-Packard Co. ............................................. 1.9 The Goldman Sachs Group, Inc. ................................... 1.9 Microsoft Corp. ................................................. 1.9 Schering-Plough Corp. ........................................... 1.6 Exxon Mobil Corp. ............................................... 1.4 Lockheed Martin Corp. ........................................... 1.4 - -------------------------------------------------------------------------------- Percent of Master Large Cap Value Portfolio Net Assets - -------------------------------------------------------------------------------- Exxon Mobil Corp. ............................................... 6.5% Citigroup, Inc. ................................................. 4.1 JPMorgan Chase & Co. ............................................ 3.4 Chevron ......................................................... 3.2 Morgan Stanley .................................................. 2.0 Merck & Co., Inc. ............................................... 1.7 Valero Energy Corp. ............................................. 1.6 The Travelers Cos., Inc. ........................................ 1.5 Walt Disney Co. ................................................. 1.5 Marathon Oil Corp. .............................................. 1.5 - -------------------------------------------------------------------------------- 44 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Schedule of Investments as of April 30, 2007 (Unaudited) Master Large Cap Core Portfolio Shares Sector Industry Common Stocks Held Value =============================================================================== Consumer Discretionary -- 17.8% Auto Components -- 0.2% The Goodyear Tire & Rubber Co. (a)(c) 310,000 $ 10,310,600 ---------------------------------------------------------------------- Automobiles -- 1.0% General Motors Corp. (c) 1,450,000 45,283,500 ---------------------------------------------------------------------- Diversified Consumer Services -- 0.5% ITT Educational Services, Inc. (a) 220,000 21,386,200 ---------------------------------------------------------------------- Leisure Equipment & Products -- 1.4% Hasbro, Inc. 420,000 13,276,200 Mattel, Inc. (c) 1,670,000 47,261,000 -------------- 60,537,200 ---------------------------------------------------------------------- Media -- 3.8% The DIRECTV Group, Inc. (a)(c) 1,980,000 47,203,200 Meredith Corp. 110,000 6,371,200 Omnicom Group (c) 460,000 48,166,600 Walt Disney Co. (c) 1,820,000 63,663,600 -------------- 165,404,600 ---------------------------------------------------------------------- Multiline Retail -- 3.2% Dollar Tree Stores, Inc. (a) 90,000 3,538,800 JC Penney Co., Inc. 490,000 38,754,100 Kohl's Corp. (a)(c) 680,000 50,347,200 Nordstrom, Inc. (c) 880,000 48,329,600 -------------- 140,969,700 ---------------------------------------------------------------------- Specialty Retail -- 6.6% Abercrombie & Fitch Co. Class A (c) 490,000 40,013,400 American Eagle Outfitters, Inc. 1,410,000 41,552,700 AutoZone, Inc. (a) 340,000 45,233,600 OfficeMax, Inc. 430,000 21,164,600 RadioShack Corp. 1,310,000 38,081,700 Ross Stores, Inc. 1,120,000 37,128,000 The Sherwin-Williams Co. 400,000 25,508,000 TJX Cos., Inc. 1,490,000 41,556,100 -------------- 290,238,100 ---------------------------------------------------------------------- Textiles, Apparel & Luxury Goods -- 1.1% Coach, Inc. (a)(c) 970,000 47,365,100 ---------------------------------------------------------------------- Total Consumer Discretionary 781,495,000 =============================================================================== Consumer Staples -- 3.1% Food & Staples Retailing -- 2.3% The Kroger Co. 1,740,000 51,347,400 Safeway, Inc. 1,360,000 49,368,000 -------------- 100,715,400 ---------------------------------------------------------------------- Food Products -- 0.3% HJ Heinz Co. 330,000 15,546,300 ---------------------------------------------------------------------- Household Products -- 0.5% The Procter & Gamble Co. 320,000 20,579,200 ---------------------------------------------------------------------- Total Consumer Staples 136,840,900 =============================================================================== Energy -- 10.6% Oil, Gas & Consumable Fuels -- 10.6% Chevron Corp. 1,210,000 94,125,900 Exxon Mobil Corp. 2,230,000 177,017,400 Frontier Oil Corp. 1,250,000 44,162,500 Holly Corp. 720,000 45,792,000 Marathon Oil Corp. 540,000 54,837,000 Tesoro Corp. 390,000 47,268,000 ---------------------------------------------------------------------- Total Energy 463,202,800 =============================================================================== Financials -- 11.5% Capital Markets -- 3.5% The Goldman Sachs Group, Inc. 320,000 69,955,200 Lehman Brothers Holdings, Inc. (c) 170,000 12,797,600 Morgan Stanley 840,000 70,568,400 -------------- 153,321,200 ---------------------------------------------------------------------- Diversified Financial Services -- 3.9% Bank of America Corp. 490,000 24,941,000 Citigroup, Inc. 700,000 37,534,000 Moody's Corp. (c) 180,000 11,901,600 JPMorgan Chase & Co. 1,830,000 95,343,000 -------------- 169,719,600 ---------------------------------------------------------------------- Insurance -- 3.8% AMBAC Financial Group, Inc. 260,000 23,868,000 The Allstate Corp. 770,000 47,986,400 American International Group, Inc. 170,000 11,884,700 Prudential Financial, Inc. 250,000 23,750,000 Safeco Corp. 80,000 5,339,200 The Travelers Cos., Inc. 1,020,000 55,182,000 -------------- 168,010,300 ---------------------------------------------------------------------- Real Estate Management & Development -- 0.3% CB Richard Ellis Group, Inc. (a) 360,000 12,186,000 ---------------------------------------------------------------------- Total Financials 503,237,100 =============================================================================== Health Care -- 20.9% Biotechnology -- 0.9% Biogen Idec, Inc. (a) 850,000 40,128,500 ---------------------------------------------------------------------- Health Care Equipment & Supplies -- 2.0% Kinetic Concepts, Inc. (a) 760,000 38,000,000 Zimmer Holdings, Inc. (a) 560,000 50,668,800 -------------- 88,668,800 ---------------------------------------------------------------------- Health Care Providers & Services -- 11.7% Aetna, Inc. 1,140,000 53,443,200 AmerisourceBergen Corp. (c) 876,000 43,791,240 Cigna Corp. 330,000 51,344,700 Express Scripts, Inc. (a)(c) 480,000 45,864,000 Humana, Inc. (a)(c) 730,000 46,165,200 Laboratory Corp. of America Holdings (a)(c) 550,000 43,417,000 McKesson Corp. 830,000 48,828,900 Medco Health Solutions, Inc. (a) 690,000 53,833,800 UnitedHealth Group, Inc. 1,210,000 64,202,600 WellPoint, Inc. (a)(c) 750,000 59,227,500 -------------- 510,118,140 ---------------------------------------------------------------------- Health Care Technology -- 1.0% Emdeon Corp. (a) 2,770,000 44,707,800 ---------------------------------------------------------------------- Life Sciences Tools & Services -- 0.7% Waters Corp. (a) 530,000 31,497,900 ---------------------------------------------------------------------- BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 45 Schedule of Investments (continued) Master Large Cap Core Portfolio Shares Sector Industry Common Stocks Held Value =============================================================================== Health Care (concluded) Pharmaceuticals -- 4.6% Forest Laboratories, Inc. (a)(c) 910,000 $ 48,421,100 Johnson & Johnson 210,000 13,486,200 King Pharmaceuticals, Inc. (a)(c) 1,211,000 24,764,950 Pfizer, Inc. 2,038,000 53,925,480 Schering-Plough Corp. 1,840,000 58,383,200 -------------- 198,980,930 ---------------------------------------------------------------------- Total Health Care 914,102,070 =============================================================================== Industrials -- 10.1% Aerospace & Defense -- 3.6% Honeywell International, Inc. 1,070,000 57,972,600 Lockheed Martin Corp. (c) 550,000 52,877,000 Raytheon Co. 867,200 46,429,888 -------------- 157,279,488 ---------------------------------------------------------------------- Airlines -- 2.0% AMR Corp. (a) 1,580,000 41,222,200 Continental Airlines, Inc. Class B (a)(c) 1,250,000 45,700,000 -------------- 86,922,200 ---------------------------------------------------------------------- Commercial Services & Supplies -- 1.1% Avery Dennison Corp. 270,000 16,794,000 Manpower, Inc. 390,000 31,297,500 -------------- 48,091,500 ---------------------------------------------------------------------- Industrial Conglomerates -- 1.6% General Electric Co. 1,890,000 69,665,400 ---------------------------------------------------------------------- Machinery -- 1.8% Cummins, Inc. 490,000 45,158,400 Manitowoc Co. 176,000 12,008,480 Terex Corp. (a) 150,000 11,677,500 Toro Co. 210,000 10,552,500 -------------- 79,396,880 ---------------------------------------------------------------------- Total Industrials 441,355,468 =============================================================================== Information Technology -- 19.2% Communications Equipment -- 2.1% Cisco Systems, Inc. (a) 3,450,000 92,253,000 ---------------------------------------------------------------------- Computers & Peripherals -- 5.6% Hewlett-Packard Co. 1,870,000 78,801,800 International Business Machines Corp. 910,000 93,011,100 Lexmark International, Inc. Class A (a) 710,000 38,695,000 NCR Corp. (a) 653,000 32,911,200 -------------- 243,419,100 ---------------------------------------------------------------------- Electronic Equipment & Instruments -- 0.9% Avnet, Inc. (a)(c) 680,000 27,812,000 Mettler Toledo International, Inc. (a) 130,000 12,690,600 -------------- 40,502,600 ---------------------------------------------------------------------- IT Services -- 1.1% Electronic Data Systems Corp. 1,660,000 48,538,400 ---------------------------------------------------------------------- Office Electronics -- 1.1% Xerox Corp. (a) 2,580,000 47,730,000 ---------------------------------------------------------------------- Semiconductors & Semiconductor Equipment -- 2.7% Applied Materials, Inc. (c) 2,730,000 52,470,600 Integrated Device Technology, Inc. (a) 1,340,000 20,073,200 Novellus Systems, Inc. (a) 1,450,000 46,936,500 -------------- 119,480,300 ---------------------------------------------------------------------- Software -- 5.7% BEA Systems, Inc. (a) 2,960,000 34,898,400 BMC Software, Inc. (a)(c) 1,480,000 47,907,600 Cadence Design Systems, Inc. (a) 1,510,000 33,522,000 Compuware Corp. (a) 1,110,000 10,955,700 McAfee, Inc. (a) 170,000 5,523,300 Microsoft Corp. 1,810,000 54,191,400 Oracle Corp. (a) 3,230,000 60,724,000 -------------- 247,722,400 ---------------------------------------------------------------------- Total Information Technology 839,645,800 =============================================================================== Materials -- 5.1% Chemicals -- 0.9% Lyondell Chemical Co. 1,330,000 41,389,600 ---------------------------------------------------------------------- Containers & Packaging -- 1.3% Crown Holdings, Inc. (a) 640,000 15,468,800 Pactiv Corp. (a) 1,180,000 40,804,400 -------------- 56,273,200 ---------------------------------------------------------------------- Metals & Mining -- 2.1% Nucor Corp. 730,000 46,325,800 Southern Copper Corp. (c) 580,000 46,574,000 -------------- 92,899,800 ---------------------------------------------------------------------- Paper & Forest Products -- 0.8% International Paper Co. (c) 870,000 32,816,400 ---------------------------------------------------------------------- Total Materials 223,379,000 =============================================================================== Telecommunication Services -- 1.7% Diversified Telecommunication Services -- 1.7% AT&T Inc. 790,000 30,588,800 Qwest Communications International Inc. (a)(c) 5,070,000 45,021,600 ---------------------------------------------------------------------- Total Telecommunication Services 75,610,400 =============================================================================== Total Common Stocks (Cost -- $3,560,516,210) -- 100.0% 4,378,868,538 =============================================================================== =============================================================================== Short-Term Beneficial Securities Interest =============================================================================== BlackRock Liquidity Series, LLC Money Market Series, 5.33% (b)(d)(e) $799,478,410 799,478,410 ---------------------------------------------------------------------- Total Short-Term Securities (Cost -- $799,478,410) -- 18.3% 799,478,410 =============================================================================== Total Investments (Cost -- $4,359,994,620*) -- 118.3% 5,178,346,948 Liabilities in Excess of Other Assets -- (18.3%) (800,795,644) -------------- Net Assets -- 100.0% $4,377,551,304 ============== 46 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Schedule of Investments (concluded) Master Large Cap Core Portfolio * The cost and unrealized appreciation (depreciation) of investments as of April 30, 2007, as computed for federal income tax purposes, were as follows: Aggregate cost ...................................... $ 4,371,963,500 =============== Gross unrealized appreciation ....................... $ 836,369,956 Gross unrealized depreciation ....................... (29,986,508) --------------- Net unrealized appreciation ......................... $ 806,383,448 =============== (a) Non-income producing security. (b) Security was purchased with the cash proceeds from securities loans. (c) Security, or a portion of security, is on loan. (d) Represents the current yield as of April 30, 2007. (e) Investments in companies considered to be an affiliate of the Portfolio, for purposes of Section 2(a)(3) of the investment Company act of 1940, were as follows: -------------------------------------------------------------------------- Net Interest Affiliate Activity Income -------------------------------------------------------------------------- BlackRock Liquidity Series, LLC Cash Sweep Series -- $ 42,714 BlackRock Liquidity Series, LLC Money Market Series $150,599,610 $ 429,213 -------------------------------------------------------------------------- o For Portfolio compliance purposes, the Portfolio's sector and industry classifications refer to any one or more of the sector and industry sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Portfolio management. This definition may not apply for purposes of this report, which may combine sector and industry sub-classifications for reporting ease. Sectors and industries are shown as a percent of net assets. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 47 Schedule of Investments as of April 30, 2007 (Unaudited) Master Large Cap Growth Portfolio Shares Sector Industry Common Stocks Held Value =============================================================================== Consumer Discretionary -- 19.5% Automobiles -- 0.8% Harley-Davidson, Inc. (d) 117,000 $ 7,408,440 ---------------------------------------------------------------------- Diversified Consumer Services -- 1.1% ITT Educational Services, Inc. (b)(d) 110,000 10,693,100 ---------------------------------------------------------------------- Media -- 4.6% The DIRECTV Group, Inc. (b) 485,000 11,562,400 Meredith Corp. 160,000 9,267,200 Omnicom Group (d) 117,000 12,251,070 Walt Disney Co. (d) 370,000 12,942,600 -------------- 46,023,270 ---------------------------------------------------------------------- Multiline Retail -- 5.2% Dollar Tree Stores, Inc. (b) 268,000 10,537,760 Family Dollar Stores, Inc. 329,000 10,475,360 JC Penney Co., Inc. 80,000 6,327,200 Kohl's Corp. (b) 180,000 13,327,200 Nordstrom, Inc. (d) 213,000 11,697,960 -------------- 52,365,480 ---------------------------------------------------------------------- Specialty Retail -- 6.9% American Eagle Outfitters, Inc. 335,000 9,872,450 AutoZone, Inc. (b) 81,000 10,776,240 Men's Wearhouse, Inc. 177,000 7,658,790 RadioShack Corp. 390,000 11,337,300 Ross Stores, Inc. 309,000 10,243,350 The Sherwin-Williams Co. 150,000 9,565,500 TJX Cos., Inc. 356,000 9,928,840 -------------- 69,382,470 ---------------------------------------------------------------------- Textiles, Apparel & Luxury Goods -- 0.9% Coach, Inc. (b) 182,000 8,887,060 ---------------------------------------------------------------------- Total Consumer Discretionary 194,759,820 =============================================================================== Consumer Staples -- 2.2% Food & Staples Retailing -- 1.1% The Kroger Co. 368,000 10,859,680 ---------------------------------------------------------------------- Household Products -- 1.1% Energizer Holdings, Inc. (b) 116,000 11,272,880 ---------------------------------------------------------------------- Total Consumer Staples 22,132,560 =============================================================================== Energy -- 4.5% Oil, Gas & Consumable Fuels -- 4.5% Exxon Mobil Corp. 173,000 13,732,740 Frontier Oil Corp. (d) 277,000 9,786,410 Holly Corp. (d) 175,000 11,130,000 Tesoro Corp. 89,000 10,786,800 ---------------------------------------------------------------------- Total Energy 45,435,950 =============================================================================== Financials -- 5.8% Capital Markets -- 3.0% The Goldman Sachs Group, Inc. (d) 86,000 18,800,460 Morgan Stanley 135,000 11,341,350 -------------- 30,141,810 ---------------------------------------------------------------------- Insurance -- 1.8% AMBAC Financial Group, Inc. 75,000 6,885,000 CNA Financial Corp. (d) 230,000 10,734,100 -------------- 17,619,100 ---------------------------------------------------------------------- Real Estate Management & Development -- 1.0% CB Richard Ellis Group, Inc. (b) 303,000 10,256,550 ---------------------------------------------------------------------- Total Financials 58,017,460 =============================================================================== Health Care -- 19.8% Biotechnology -- 1.0% Biogen Idec, Inc. (b) 211,000 9,961,310 ---------------------------------------------------------------------- Health Care Equipment & Supplies -- 2.4% Kinetic Concepts, Inc. (b) 210,000 10,500,000 Zimmer Holdings, Inc. (b) 144,000 13,029,120 -------------- 23,529,120 ---------------------------------------------------------------------- Health Care Providers & Services -- 10.7% Aetna, Inc. 253,000 11,860,640 AmerisourceBergen Corp. 128,000 6,398,720 Express Scripts, Inc. (b) 120,000 11,466,000 Humana, Inc. (b) 180,000 11,383,200 Laboratory Corp. of America Holdings (b)(d) 148,000 11,683,120 McKesson Corp. 151,900 8,936,277 Medco Health Solutions, Inc. (b) 160,000 12,483,200 UnitedHealth Group, Inc. 370,000 19,632,200 WellPoint, Inc. (b) 170,000 13,424,900 -------------- 107,268,257 ---------------------------------------------------------------------- Health Care Technology -- 1.0% Emdeon Corp. (b) 648,000 10,458,720 ---------------------------------------------------------------------- Life Sciences Tools & Services -- 1.1% Waters Corp. (b) 186,000 11,053,980 ---------------------------------------------------------------------- Pharmaceuticals -- 3.6% Forest Laboratories, Inc. (b)(d) 227,000 12,078,670 Johnson & Johnson 45,000 2,889,900 Pfizer, Inc. 177,600 4,699,296 Schering-Plough Corp. 510,000 16,182,300 -------------- 35,850,166 ---------------------------------------------------------------------- Total Health Care 198,121,553 =============================================================================== Industrials -- 12.3% Aerospace & Defense -- 3.8% Honeywell International, Inc. 249,000 13,490,820 Lockheed Martin Corp. 142,000 13,651,880 Raytheon Co. 208,000 11,136,320 -------------- 38,279,020 ---------------------------------------------------------------------- Airlines -- 1.9% AMR Corp. (b) 366,000 9,548,940 Continental Airlines, Inc. Class B (b)(d) 276,000 10,090,560 -------------- 19,639,500 ---------------------------------------------------------------------- 48 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Schedule of Investments (continued) Master Large Cap Growth Portfolio Shares Sector Industry Common Stocks Held Value =============================================================================== Industrials (concluded) Commercial Services & Supplies -- 2.5% Avery Dennison Corp. 91,000 $ 5,660,200 Manpower, Inc. 117,000 9,389,250 Steelcase, Inc. Class A 520,000 10,150,400 -------------- 25,199,850 ---------------------------------------------------------------------- Construction & Engineering -- 0.6% Quanta Services, Inc. (b)(d) 216,000 5,937,840 ---------------------------------------------------------------------- Industrial Conglomerates -- 0.5% General Electric Co. 130,000 4,791,800 ---------------------------------------------------------------------- Machinery -- 3.0% Cummins, Inc. 90,000 8,294,400 Manitowoc Co. 143,000 9,756,890 Terex Corp. (b) 91,900 7,154,415 Toro Co. 100,000 5,025,000 -------------- 30,230,705 ---------------------------------------------------------------------- Total Industrials 124,078,715 =============================================================================== Information Technology -- 28.9% Communications Equipment -- 3.2% Cisco Systems, Inc. (b) 1,186,000 31,713,640 ---------------------------------------------------------------------- Computers & Peripherals -- 6.8% EMC Corp. (b) 230,000 3,491,400 Hewlett-Packard Co. (d) 455,000 19,173,700 International Business Machines Corp. 290,000 29,640,900 Lexmark International, Inc. Class A (b) 162,000 8,829,000 NCR Corp. (b) 140,000 7,056,000 -------------- 68,191,000 ---------------------------------------------------------------------- Electronic Equipment & Instruments -- 3.0% Agilent Technologies, Inc. (b) 225,000 7,733,250 Avnet, Inc. (b)(d) 269,000 11,002,100 Mettler Toledo International, Inc. (b) 119,000 11,616,780 -------------- 30,352,130 ---------------------------------------------------------------------- IT Services -- 3.0% Convergys Corp. (b) 374,000 9,447,240 Electronic Data Systems Corp. 390,000 11,403,600 Total System Services, Inc. 281,000 8,727,860 -------------- 29,578,700 ---------------------------------------------------------------------- Semiconductors & Semiconductor Equipment -- 3.4% Applied Materials, Inc. 705,000 13,550,100 Integrated Device Technology, Inc. (b) 642,000 9,617,160 Novellus Systems, Inc. (b)(d) 327,000 10,584,990 Verigy Ltd. (b) 1 25 -------------- 33,752,275 ---------------------------------------------------------------------- Software -- 9.5% BEA Systems, Inc. (b) 665,000 7,840,350 BMC Software, Inc. (b)(d) 350,000 11,329,500 Cadence Design Systems, Inc. (b) 470,000 10,434,000 Compuware Corp. (b) 585,000 5,773,950 McAfee, Inc. (b) 360,000 11,696,400 Microsoft Corp. 621,000 18,592,740 Oracle Corp. (b) 1,048,000 19,702,400 Synopsys, Inc. (b) 369,000 10,206,540 -------------- 95,575,880 ---------------------------------------------------------------------- Total Information Technology 289,163,625 =============================================================================== Materials -- 6.8% Chemicals -- 1.9% Cabot Corp. 207,000 9,377,100 International Flavors & Fragrances, Inc. 200,000 9,734,000 -------------- 19,111,100 ---------------------------------------------------------------------- Containers & Packaging -- 3.1% Crown Holdings, Inc. (b) 430,000 10,393,100 Pactiv Corp. (b) 298,000 10,304,840 Sealed Air Corp. 298,000 9,804,200 -------------- 30,502,140 ---------------------------------------------------------------------- Metals & Mining -- 1.8% Nucor Corp. 125,300 7,951,538 Southern Copper Corp. (d) 129,000 10,358,700 -------------- 18,310,238 ---------------------------------------------------------------------- Total Materials 67,923,478 =============================================================================== Total Common Stocks (Cost -- $830,669,980) -- 99.8% 999,633,161 =============================================================================== =============================================================================== Short-Term Beneficial Securities Interest =============================================================================== BlackRock Liquidity Series, LLC Cash Sweep Series, 5.26% (a)(c) $ 2,777,826 2,777,826 BlackRock Liquidity Series, LLC Money Market Series, 5.33% (a)(c)(e) 134,891,850 134,891,850 ---------------------------------------------------------------------- Total Short-Term Securities (Cost -- $137,669,676) -- 13.8% 137,669,676 =============================================================================== Total Investments (Cost -- $968,339,656*) -- 113.6% 1,137,302,837 Liabilities in Excess of Other Assets -- (13.6%) (135,887,037) -------------- Net Assets -- 100.0% $1,001,415,800 ============== BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 49 Schedule of Investments (concluded) Master Large Cap Growth Portfolio * The cost and unrealized appreciation (depreciation) of investments as of April 30, 2007, as computed for federal income tax purposes, were as follows: Aggregate cost ......................................... $ 970,430,989 ============= Gross unrealized appreciation .......................... $ 172,720,191 Gross unrealized depreciation .......................... (5,848,343) ------------- Net unrealized appreciation ............................ $ 166,871,848 ============= (a) Investments in companies considered to be an affiliate of the Portfolio, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: -------------------------------------------------------------------------- Net Interest Affiliate Activity Income -------------------------------------------------------------------------- BlackRock Liquidity Series, LLC Cash Sweep Series $ 2,473,170 $ 62,426 BlackRock Liquidity Series, LLC Money Market Series $36,931,000 $ 63,749 -------------------------------------------------------------------------- (b) Non-income producing security. (c) Represents the current yield as of April 30, 2007. (d) Security, or a portion of security, is on loan. (e) Security was purchased with the cash proceeds from securities loans. o For Portfolio compliance purposes, the Portfolio's sector and industry classifications refer to any one or more of the sector and industry sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Portfolio management. This definition may not apply for purposes of this report, which may combine such sector and industry sub-classifications for reporting ease. Sectors and industries are shown as a percent of net assets. See Notes to Financial Statements. 50 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Schedule of Investments as of April 30, 2007 (Unaudited) Master Large Cap Value Portfolio Shares Sector Industry Common Stocks Held Value =============================================================================== Consumer Discretionary -- 10.9% Automobiles -- 1.0% General Motors Corp. (e) 1,610,000 $ 50,280,300 ---------------------------------------------------------------------- Leisure Equipment & Products -- 2.2% Hasbro, Inc. (e) 1,660,000 52,472,600 Mattel, Inc. 1,990,000 56,317,000 -------------- 108,789,600 ---------------------------------------------------------------------- Media -- 1.6% The DIRECTV Group, Inc. (b) 167,900 4,002,736 Walt Disney Co. (e) 2,110,000 73,807,800 -------------- 77,810,536 ---------------------------------------------------------------------- Multiline Retail -- 3.1% Dillard's, Inc. Class A 90,000 3,116,700 Dollar Tree Stores, Inc. (b) 1,080,000 42,465,600 Family Dollar Stores, Inc. 1,510,000 48,078,400 JC Penney Co., Inc. 475,600 37,615,204 Nordstrom, Inc. (e) 320,000 17,574,400 -------------- 148,850,304 ---------------------------------------------------------------------- Specialty Retail -- 3.0% OfficeMax, Inc. 900,000 44,298,000 RadioShack Corp. (e) 1,840,000 53,488,800 The Sherwin-Williams Co. (e) 760,000 48,465,200 -------------- 146,252,000 ---------------------------------------------------------------------- Total Consumer Discretionary 531,982,740 =============================================================================== Consumer Staples -- 4.9% Food & Staples Retailing -- 2.5% The Kroger Co. 2,090,000 61,675,900 Safeway, Inc. (e) 1,640,000 59,532,000 -------------- 121,207,900 ---------------------------------------------------------------------- Food Products -- 1.4% ConAgra Foods, Inc. (e) 490,000 12,044,200 HJ Heinz Co. 1,140,000 53,705,400 -------------- 65,749,600 ---------------------------------------------------------------------- Household Products -- 1.0% Energizer Holdings, Inc. (b)(e) 390,000 37,900,200 The Procter & Gamble Co. 200,000 12,862,000 -------------- 50,762,200 ---------------------------------------------------------------------- Total Consumer Staples 237,719,700 =============================================================================== Energy -- 15.3% Energy Equipment & Services -- 0.1% Tidewater, Inc. (e) 80,000 5,056,800 ---------------------------------------------------------------------- Oil, Gas & Consumable Fuels -- 15.2% Chevron Corp. 2,000,000 155,580,000 Exxon Mobil Corp. 3,980,000 315,932,400 Frontier Oil Corp. (e) 1,380,000 48,755,400 Marathon Oil Corp. (e) 710,000 72,100,500 Overseas Shipholding Group, Inc. 150,000 10,620,000 Tesoro Corp. 500,000 60,600,000 Valero Energy Corp. 1,090,000 76,550,700 -------------- 740,139,000 ---------------------------------------------------------------------- Total Energy 745,195,800 =============================================================================== Financials -- 24.7% Capital Markets -- 5.8% The Bear Stearns Cos., Inc. (e) 330,000 51,381,000 The Goldman Sachs Group, Inc. (e) 290,000 63,396,900 Janus Capital Group, Inc. 190,000 4,753,800 Lehman Brothers Holdings, Inc. (e) 880,000 66,246,400 Morgan Stanley 1,190,000 99,971,900 -------------- 285,750,000 ---------------------------------------------------------------------- Diversified Financial Services -- 8.8% Bank of America Corp. 1,160,000 59,044,000 Citigroup, Inc. 3,780,000 202,683,600 JPMorgan Chase & Co. 3,210,000 167,241,000 -------------- 428,968,600 ---------------------------------------------------------------------- Insurance -- 9.2% AMBAC Financial Group, Inc. (e) 520,000 47,736,000 Alleghany Corp. (b)(e) 6,000 2,146,800 The Allstate Corp. (e) 1,100,000 68,552,000 American Financial Group, Inc. 540,000 19,045,800 American International Group, Inc. 10,000 699,100 CNA Financial Corp. (e) 440,000 20,534,800 Chubb Corp. 354,500 19,082,735 The Hanover Insurance Group, Inc. 260,000 11,949,600 Markel Corp. (b) 10,000 4,589,100 MetLife, Inc. 680,000 44,676,000 Nationwide Financial Services, Inc. Class A (e) 290,000 16,567,700 Prudential Financial, Inc. (e) 750,000 71,250,000 Safeco Corp. 710,000 47,385,400 The Travelers Cos., Inc. 1,380,000 74,658,000 -------------- 448,873,035 ---------------------------------------------------------------------- Thrifts & Mortgage Finance -- 0.9% The PMI Group, Inc. (e) 920,000 44,592,400 Total Financials 1,208,184,035 =============================================================================== Health Care -- 11.9% Biotechnology -- 1.0% Biogen Idec, Inc. (b) 1,050,000 49,570,500 ---------------------------------------------------------------------- Health Care Providers & Services -- 7.8% Aetna, Inc. 1,250,000 58,600,000 AmerisourceBergen Corp. (e) 1,070,000 53,489,300 Cigna Corp. 380,000 59,124,200 Humana, Inc. (b) 360,000 22,766,400 McKesson Corp. (e) 890,000 52,358,700 Medco Health Solutions, Inc. (b) 730,000 56,954,600 Service Corp. International 670,000 8,140,500 WellPoint, Inc. (b) 850,000 67,124,500 -------------- 378,558,200 ---------------------------------------------------------------------- Pharmaceuticals -- 3.1% King Pharmaceuticals, Inc. (b)(e) 1,010,000 20,654,500 Merck & Co., Inc. 1,647,100 84,726,824 Pfizer, Inc. 1,697,100 44,905,266 -------------- 150,286,590 ---------------------------------------------------------------------- Total Health Care 578,415,290 =============================================================================== BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 51 Schedule of Investments (continued) Master Large Cap Value Portfolio Shares Sector Industry Common Stocks Held Value =============================================================================== Industrials -- 9.4% Aerospace & Defense -- 3.9% Honeywell International, Inc. 1,220,000 $ 66,099,600 L-3 Communications Holdings, Inc. 190,000 17,086,700 Lockheed Martin Corp. 23,000 2,211,220 Northrop Grumman Corp. 670,000 49,338,800 Raytheon Co. 1,070,000 57,287,800 -------------- 192,024,120 ---------------------------------------------------------------------- Airlines -- 1.0% AMR Corp. (b)(e) 1,900,000 49,571,000 ---------------------------------------------------------------------- Commercial Services & Supplies -- 1.6% Manpower, Inc. 500,000 40,125,000 RR Donnelley & Sons Co. (e) 1,000,000 40,200,000 -------------- 80,325,000 ---------------------------------------------------------------------- Construction & Engineering -- 0.4% Quanta Services, Inc. (b) 690,000 18,968,100 ---------------------------------------------------------------------- Industrial Conglomerates -- 0.7% General Electric Co. 880,000 32,436,800 ---------------------------------------------------------------------- Machinery -- 1.8% Cummins, Inc. (e) 520,000 47,923,200 SPX Corp. (e) 560,000 39,692,800 -------------- 87,616,000 ---------------------------------------------------------------------- Total Industrials 460,941,020 =============================================================================== Information Technology -- 13.3% Computers & Peripherals -- 3.8% EMC Corp. (b) 380,000 5,768,400 Hewlett-Packard Co. 1,710,000 72,059,400 International Business Machines Corp. 540,000 55,193,400 Lexmark International, Inc. Class A (b)(e) 730,000 39,785,000 NCR Corp. (b) 300,000 15,120,000 -------------- 187,926,200 ---------------------------------------------------------------------- Electronic Equipment & Instruments -- 1.1% Avnet, Inc. (b)(e) 1,290,000 52,761,000 ---------------------------------------------------------------------- IT Services -- 1.4% Convergys Corp. (b) 610,000 15,408,600 Electronic Data Systems Corp. 1,820,000 53,216,800 -------------- 68,625,400 ---------------------------------------------------------------------- Office Electronics -- 1.3% Xerox Corp. (b) 3,310,000 61,235,000 ---------------------------------------------------------------------- Semiconductors & Semiconductor Equipment -- 1.3% Integrated Device Technology, Inc. (b) 900,000 13,482,000 Novellus Systems, Inc. (b)(e) 1,590,000 51,468,300 -------------- 64,950,300 ---------------------------------------------------------------------- Software -- 4.4% BEA Systems, Inc. (b) 2,040,000 24,051,600 BMC Software, Inc. (b)(e) 1,050,000 33,988,500 Cadence Design Systems, Inc. (b) 2,190,000 48,618,000 Compuware Corp. (b) 1,980,000 19,542,600 McAfee, Inc. (b) 1,500,000 48,735,000 Sybase, Inc. (b)(e) 640,000 15,481,600 Synopsys, Inc. (b) 920,000 25,447,200 -------------- 215,864,500 ---------------------------------------------------------------------- Total Information Technology 651,362,400 =============================================================================== Materials -- 5.7% Chemicals -- 3.1% Albemarle Corp. 780,000 33,111,000 Cabot Corp. (e) 180,000 8,154,000 E.I. du Pont de Nemours & Co. 360,000 17,701,200 FMC Corp. 260,000 20,001,800 International Flavors & Fragrances, Inc. 380,000 18,494,600 Lubrizol Corp. (e) 52,800 3,164,832 Lyondell Chemical Co. (e) 1,680,000 52,281,600 -------------- 152,909,032 ---------------------------------------------------------------------- Containers & Packaging -- 0.2% Sealed Air Corp. 300,000 9,870,000 ---------------------------------------------------------------------- Metals & Mining -- 1.2% Nucor Corp. (e) 890,000 56,479,400 ---------------------------------------------------------------------- Paper & Forest Products -- 1.2% International Paper Co. (e) 1,500,000 56,580,000 ---------------------------------------------------------------------- Total Materials 275,838,432 =============================================================================== Telecommunication Services -- 2.4% Diversified Telecommunication Services -- 2.4% AT&T Inc. 1,710,000 66,211,200 Qwest Communications International Inc. (b)(e) 5,890,000 52,303,200 ---------------------------------------------------------------------- Total Telecommunication Services 118,514,400 =============================================================================== Utilities -- 1.4% Multi-Utilities -- 1.4% CMS Energy Corp. (e) 1,980,000 36,669,600 NiSource, Inc. 1,320,000 32,458,800 ---------------------------------------------------------------------- Total Utilities 69,128,400 ---------------------------------------------------------------------- Total Common Stocks (Cost -- $3,993,062,598) -- 99.9% 4,877,282,217 =============================================================================== =============================================================================== Short-Term Beneficial Securities Interest =============================================================================== BlackRock Liquidity Series, LLC Cash Sweep Series, 5.26% (a)(c) $ 75,432,924 75,432,924 BlackRock Liquidity Series, LLC Money Market Series, 5.33% (a)(c)(d) 863,794,434 863,794,434 ---------------------------------------------------------------------- Total Short-Term Securities (Cost -- $939,227,358) -- 19.2% 939,227,358 =============================================================================== Total Investments (Cost -- $4,932,289,956*) -- 119.1% 5,816,509,575 Liabilities in Excess of Other Assets -- (19.1%) (931,971,053) -------------- Net Assets -- 100.0% $4,884,538,522 ============== 52 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 * The cost and unrealized appreciation (depreciation) of investments as of April 30, 2007, as computed for federal income tax purposes, were as follows: Aggregate cost ....................................... $ 4,943,097,806 =============== Gross unrealized appreciation ........................ $ 893,320,776 Gross unrealized depreciation ........................ (19,909,007) --------------- Net unrealized appreciation .......................... $ 873,411,769 =============== (a) Investments in companies considered to be an affiliate of the Portfolio, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: -------------------------------------------------------------------------- Net Interest Affiliate Activity Income -------------------------------------------------------------------------- BlackRock Liquidity Series, LLC Cash Sweep Series $ 30,333,748 $ 266,659 BlackRock Liquidity Series, LLC Money Market Series $288,596,534 $ 302,602 -------------------------------------------------------------------------- (b) Non-income producing security. (c) Represents the current yield as of April 30, 2007. (d) Security was purchased with the cash proceeds from securities loans. (e) Security, or a portion of security, is on loan. o For Portfolio compliance purposes, the Portfolio's sector and industry classifications refer to any one or more of the sector and industry sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Portfolio management. This definition may not apply for purposes of this report, which may combine sector and industry sub-classifications for reporting ease. Sectors and industries are shown as a percent of net assets. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 53 Statements of Assets and Liabilities Master Large Cap Series Trust Master Large Master Large Master Large Cap Core Cap Growth Cap Value As of April 30, 2007 (Unaudited) Portfolio Portfolio Portfolio ========================================================================================================================= Assets - ------------------------------------------------------------------------------------------------------------------------- Investments in unaffiliated securities, at value*+ .... $4,378,868,538 $ 999,633,161 $4,877,282,217 Investments in affiliated securities, at value** ...... 799,478,410 137,669,676 939,227,358 Receivables: Securities sold ................................... 16,001,101 3,484,521 18,616,450 Contributions ..................................... 13,128,826 3,961,228 14,173,707 Dividends ......................................... 1,399,416 186,553 2,376,282 Securities lending ................................ 172,562 31,617 80,709 Interest from affiliates .......................... 2,360 -- -- Prepaid expenses and other assets ..................... 58,616 19,468 45,046 -------------------------------------------------- Total assets .......................................... 5,209,109,829 1,144,986,224 5,851,801,769 -------------------------------------------------- ========================================================================================================================= Liabilities - ------------------------------------------------------------------------------------------------------------------------- Collateral on securities loaned, at value ............. 799,478,410 134,891,850 863,794,434 Bank overdraft ........................................ 127,015 -- 12,655 Payables: Securities purchased .............................. 16,482,128 6,403,150 94,086,063 Withdrawals ....................................... 13,489,472 1,730,568 7,261,742 Investment adviser ................................ 1,639,639 398,653 1,860,266 Other affiliates .................................. 41,713 7,798 37,079 Accrued expenses and other liabilities ................ 300,148 138,405 211,008 -------------------------------------------------- Total liabilities ..................................... 831,558,525 143,570,424 967,263,247 -------------------------------------------------- ========================================================================================================================= Net Assets - ------------------------------------------------------------------------------------------------------------------------- Net assets ............................................ $4,377,551,304 $1,001,415,800 $4,884,538,522 ================================================== ========================================================================================================================= Net Assets Consist of - ------------------------------------------------------------------------------------------------------------------------- Investors' capital .................................... $3,559,198,976 $ 832,452,619 $4,000,318,903 Unrealized appreciation -- net ........................ 818,352,328 168,963,181 884,219,619 -------------------------------------------------- Net Assets ............................................ $4,377,551,304 $1,001,415,800 $4,884,538,522 ================================================== * Identified cost for unaffiliated securities ....... $3,560,516,210 $ 830,669,980 $3,993,062,598 ================================================== ** Identified cost for affiliated securities ......... $ 799,478,410 $ 137,669,676 $ 939,227,358 ================================================== + Securities loaned, at value ....................... $ 767,285,481 $ 130,286,111 $ 834,561,938 ================================================== See Notes to Financial Statements. 54 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Statements of Operations Master Large Cap Series Trust Master Large Master Large Master Large Cap Core Cap Growth Cap Value For the Six Months Ended April 30, 2007 (Unaudited) Portfolio Portfolio Portfolio ========================================================================================================================= Investment Income - ------------------------------------------------------------------------------------------------------------------------- Dividends ............................................. $ 25,306,109 $ 3,872,092 $ 33,835,386 Securities lending -- net ............................. 429,213 63,749 302,602 Interest from affiliates .............................. 42,714 62,426 266,659 -------------------------------------------------- Total income .......................................... 25,778,036 3,998,267 34,404,647 -------------------------------------------------- ========================================================================================================================= Expenses - ------------------------------------------------------------------------------------------------------------------------- Investment advisory fees .............................. 9,392,454 2,227,035 10,345,447 Accounting services ................................... 298,971 123,436 289,929 Custodian fees ........................................ 128,991 64,535 141,792 Trustees' fees and expenses ........................... 50,322 15,062 47,561 Professional fees ..................................... 34,426 18,348 23,440 Printing and shareholder reports ...................... 651 136 367 Pricing fees .......................................... 500 493 472 Other ................................................. 30,865 8,470 20,818 -------------------------------------------------- Total expenses ........................................ 9,937,180 2,457,515 10,869,826 -------------------------------------------------- Investment income -- net .............................. 15,840,856 1,540,752 23,534,821 -------------------------------------------------- ========================================================================================================================= Realized & Unrealized Gain -- Net - ------------------------------------------------------------------------------------------------------------------------- Realized gain on investments -- net ................... 200,873,842 25,459,019 106,173,538 Change in unrealized appreciation on investments -- net 164,770,531 66,002,658 315,237,289 -------------------------------------------------- Total realized and unrealized gain -- net ............. 365,644,373 91,461,677 421,410,827 -------------------------------------------------- Net Increase in Net Assets Resulting from Operations .. $ 381,485,229 $ 93,002,429 $ 444,945,648 ================================================== See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 55 Statements of Changes in Net Assets Master Large Cap Series Trust Master Large Cap Core Portfolio ----------------------------------- For the Six Months Ended For the April 30, Year Ended 2007 October 31, Increase (Decrease) in Net Assets: (Unaudited) 2006 ======================================================================================================================= Operations - ----------------------------------------------------------------------------------------------------------------------- Investment income -- net ................................... $ 15,840,856 $ 19,476,807 Realized gain -- net ....................................... 200,873,842 195,731,487 Change in unrealized appreciation -- net ................... 164,770,531 289,376,493 ----------------------------------- Net increase in net assets resulting from operations ....... 381,485,229 504,584,787 ----------------------------------- ======================================================================================================================= Capital Transactions - ----------------------------------------------------------------------------------------------------------------------- Proceeds from contributions ................................ 647,217,166 1,448,673,363 Fair value of withdrawals .................................. (527,789,881) (743,318,106) ----------------------------------- Net increase in net assets derived from capital transactions 119,427,285 705,355,257 ----------------------------------- ======================================================================================================================= Net Assets - ----------------------------------------------------------------------------------------------------------------------- Total increase in net assets ............................... 500,912,514 1,209,940,044 Beginning of period ........................................ 3,876,638,790 2,666,698,746 ----------------------------------- End of period .............................................. $ 4,377,551,304 $ 3,876,638,790 =================================== See Notes to Financial Statements. Statements of Changes in Net Assets Master Large Cap Series Trust Master Large Cap Growth ----------------------------------- Portfolio For the Six Months Ended For the April 30, Year Ended 2007 October 31, Increase (Decrease) in Net Assets: (Unaudited) 2006 ======================================================================================================================= Operations - ----------------------------------------------------------------------------------------------------------------------- Investment income -- net ................................... $ 1,540,752 $ 1,639,313 Realized gain -- net ....................................... 25,459,019 24,740,475 Change in unrealized appreciation -- net ................... 66,002,658 44,967,618 ----------------------------------- Net increase in net assets resulting from operations ....... 93,002,429 71,347,406 ----------------------------------- ======================================================================================================================= Capital Transactions - ----------------------------------------------------------------------------------------------------------------------- Proceeds from contributions ................................ 272,811,385 416,035,279 Fair value of withdrawals .................................. (149,774,815) (191,404,006) ----------------------------------- Net increase in net assets derived from capital transactions 123,036,570 224,631,273 ----------------------------------- ======================================================================================================================= Net Assets - ----------------------------------------------------------------------------------------------------------------------- Total increase in net assets ............................... 216,038,999 295,978,679 Beginning of period ........................................ 785,376,801 489,398,122 ----------------------------------- End of period .............................................. $ 1,001,415,800 $ 785,376,801 =================================== See Notes to Financial Statements. 56 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Statements of Changes in Net Assets Master Large Cap Series Trust Master Large Cap Value Portfolio ----------------------------------- For the Six Months Ended For the April 30, Year Ended 2007 October 31, Increase (Decrease) in Net Assets: (Unaudited) 2006 ======================================================================================================================= Operations - ----------------------------------------------------------------------------------------------------------------------- Investment income -- net ................................... $ 23,534,821 $ 17,996,957 Realized gain -- net ....................................... 106,173,538 116,615,372 Change in unrealized appreciation -- net ................... 315,237,289 276,256,898 ----------------------------------- Net increase in net assets resulting from operations ....... 444,945,648 410,869,227 ----------------------------------- ======================================================================================================================= Capital Transactions - ----------------------------------------------------------------------------------------------------------------------- Proceeds from contributions ................................ 1,049,559,598 2,669,357,535 Fair value of withdrawals .................................. (537,892,428) (688,289,120) ----------------------------------- Net increase in net assets derived from capital transactions 511,667,170 1,981,068,415 ----------------------------------- ======================================================================================================================= Net Assets - ----------------------------------------------------------------------------------------------------------------------- Total increase in net assets ............................... 956,612,818 2,391,937,642 Beginning of period ........................................ 3,927,925,704 1,535,988,062 ----------------------------------- End of period .............................................. $ 4,884,538,522 $ 3,927,925,704 =================================== See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 57 Financial Highlights Master Large Cap Series Trust Master Large Cap Core Portfolio --------------------------------------------------------------------------- For the Six Months Ended April 30, For the Year Ended October 31, The following ratios have been derived from 2007 ------------------------------------------------------------- information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Total Investment Return - ---------------------------------------------------------------------------------------------------------------------------------- Total investment return ................ 9.64%+ 17.32% 18.35% 9.61% 25.11% (8.13%) =========================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses ............................... .49%* .49% .51% .52% .54% .57% =========================================================================== Investment income -- net ............... .78%* .58% .72% .57% .48% .83% =========================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) $4,377,551 $3,876,639 $2,666,699 $1,831,300 $1,454,109 $ 873,704 =========================================================================== Portfolio turnover ..................... 36.05% 87.67% 93.95% 135.48% 138.73% 150.18% =========================================================================== * Annualized. + Aggregate total investment return. See Notes to Financial Statements. Financial Highlights Master Large Cap Series Trust Master Large Cap Growth Portfolio --------------------------------------------------------------------------- For the Six Months Ended April 30, For the Year Ended October 31, The following ratios have been derived from 2007 ------------------------------------------------------------- information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Total Investment Return - ---------------------------------------------------------------------------------------------------------------------------------- Total investment return ................ 10.75%+ 14.05% 12.47% 5.42% 25.01% (13.56%) =========================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses ............................... .55%* .56% .57% .59% .61% .67% =========================================================================== Investment income -- net ............... .35%* .26% .33% .09% .04% (.01%) =========================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) $1,001,416 $ 785,377 $ 489,398 $ 344,400 $ 250,166 $ 185,676 =========================================================================== Portfolio turnover ..................... 39.26% 116.77% 131.79% 164.94% 178.11% 177.46% =========================================================================== * Annualized. + Aggregate total investment return. See Notes to Financial Statements. 58 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Financial Highlights Master Large Cap Series Trust Master Large Cap Value Portfolio --------------------------------------------------------------------------- For the Six Months Ended April 30, For the Year Ended October 31, The following ratios have been derived from 2007 ------------------------------------------------------------- information provided in the financial statements. (Unaudited) 2006 2005 2004 2003 2002 ================================================================================================================================== Total Investment Return - ---------------------------------------------------------------------------------------------------------------------------------- Total investment return ................ 10.71%+ 18.48% 21.93% 14.57% 27.05% (3.40%) =========================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses ............................... .51%* .53% .55% .56% .57% .60% =========================================================================== Investment income -- net ............... 1.10%* .73% .80% .93% .97% 1.17% =========================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) $4,884,539 $3,927,926 $1,535,988 $ 810,489 $ 515,257 $ 386,918 =========================================================================== Portfolio turnover ..................... 27.50% 70.86% 94.95% 127.59% 157.04% 136.92% =========================================================================== * Annualized. + Aggregate total investment return. See Notes to Financial Statements. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 59 Notes to Financial Statements (Unaudited) Master Large Cap Series Trust 1. Significant Accounting Policies: Master Large Cap Core Portfolio, Master Large Cap Growth Portfolio and Master Large Cap Value Portfolio (the "Portfolios" or individually as the "Portfolio") constitute the Master Large Cap Series Trust (the "Trust"). The Trust is registered under the Investment Company Act of 1940, as amended, and is organized as a Delaware statutory trust. The Declaration of Trust permits the Trustees to issue nontransferable interests in the Portfolios, subject to certain limitations. The Portfolios' financial statements are prepared in conformity with U.S. generally accepted accounting principles, which may require the use of management accruals and estimates. Actual results may differ from these estimates. These unaudited financial statements reflect all adjustments, which are, in the opinion of management, necessary to present a fair statement of the results for the interim period. All such adjustments are of a normal, recurring nature. The following is a summary of significant accounting policies followed by the Portfolios. (a) Valuation of investments -- Equity securities held by each Portfolio that are traded on stock exchanges or the NASDAQ Global Market are valued at the last sale price or official close price on the exchange, as of the close of business on the day the securities are being valued or, lacking any sales, at the last available bid price for long positions, and at the last available asked price for short positions. In cases where equity securities are traded on more than one exchange, the securities are valued on the exchange designated as the primary market by or under the authority of the Board of Trustees of the Trust. Long positions traded in the over-the-counter ("OTC") markets, NASDAQ Capital Market or Bulletin Board are valued at the last available bid price or yield equivalent obtained from one or more dealers or pricing services approved by the Board of Trustees of the Trust. Short positions traded in the OTC markets are valued at the last available asked price. Portfolio securities that are traded both in the OTC markets and on a stock exchange are valued according to the broadest and most representative market. Options written or purchased are valued at the last sale price in the case of exchange-traded options. Options traded in the OTC market are valued at the last asked price (options written) or the last bid price (options purchased). Swap agreements are valued based upon quoted fair valuations received daily by the Portfolios from a pricing service or counterparty. Financial futures contracts and options thereon, which are traded on exchanges, are valued at their last sale price as of the close of such exchanges. Valuation of short-term investment vehicles is generally based on the net asset value of the underlying investment vehicle or amortized cost. Repurchase agreements are valued at cost plus accrued interest. Each Portfolio employs pricing services to provide certain securities prices for the Portfolio. Securities and assets for which market quotations are not readily available are valued at fair value as determined in good faith by or under the direction of the Board of Trustees of the Trust, including valuations furnished by the pricing services retained by each Portfolio, which may use a matrix system for valuations. The procedures of a pricing service and its valuations are reviewed by the officers of the Trust under the general supervision of the Trust's Board of Trustees. Such valuations and procedures will be reviewed periodically by the Board of Trustees of the Trust. Generally, trading in foreign securities, as well as U.S. government securities, money market instruments, and certain fixed income securities, is substantially completed each day at various times prior to the close of business on the New York Stock Exchange ("NYSE"). The values of such securities used in computing the net assets of each Portfolio are determined as of such times. Foreign currency exchange rates will generally be determined as of the close of business on the NYSE. Occasionally, events affecting the values of such securities and such exchange rates may occur between the times at which they are determined and the close of business on the NYSE that may not be reflected in the computation of each Portfolio's net assets. If events (for example, a company announcement, market volatility or a natural disaster) occur during such periods that are expected to materially affect the value of such securities, those securities will be valued at their fair value as determined in good faith by the Trust's Board of Trustees or by BlackRock Advisors, LLC (the "Manager"), an indirect, wholly owned subsidiary of BlackRock, Inc. using a pricing service and/or procedures approved by the Trust's Board of Trustees. (b) Derivative financial instruments -- Each Portfolio may engage in various portfolio investment strategies both to increase the return of the Portfolio and to hedge, or protect, its exposure to interest rate movements and movements in the securities markets. Losses may arise due to changes in the value of the contract or if the counterparty does not perform under the contract. The counterparty for certain instruments may pledge cash or securities as collateral. o Financial futures contracts -- Each Portfolio may purchase or sell financial futures contracts and options on 60 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Notes to Financial Statements (continued) Master Large Cap Series Trust such financial futures contracts. Financial futures contracts are contracts for delayed delivery of securities at a specific date and at a specific price or yield. Upon entering into a contract, the Portfolio deposits, and maintains as collateral, such initial margin as required by the exchange on which the transaction is effected. Pursuant to the contract, the Portfolio agrees to receive from or pay to the broker an amount of cash equal to the daily fluctuation in value of the contract. Such receipts or payments are known as variation margin and are recorded by the Portfolio as unrealized gains or losses. When the contract is closed, the Portfolio records a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value at the time it was closed. o Options -- Each Portfolio may purchase and write call and put options. When the Portfolio writes an option, an amount equal to the premium received by the Portfolio is reflected as an asset and an equivalent liability. The amount of the liability is subsequently marked-to-market to reflect the current market value of the option written. When a security is purchased or sold through an exercise of an option, the related premium paid (or received) is added to (or deducted from) the basis of the security acquired or deducted from (or added to) the proceeds of the security sold. When an option expires (or the Portfolio enters into a closing transaction), the Portfolio realizes a gain or loss on the option to the extent of the premiums received or paid (or a gain or loss to the extent that the cost of the closing transaction exceeds the premium paid or received). Written and purchased options are non-income producing investments. (c) Income taxes -- Master Large Cap Core Portfolio and Master Large Cap Value Portfolio are classified as partnerships for federal income tax purposes. Master Large Cap Growth Portfolio is considered as a "pass-through" entity for federal income tax purposes. As such, each investor in the Portfolio is treated as owner of its proportionate share of the net assets, income, expenses and realized and unrealized gains and losses of the Portfolio. Therefore, no federal income tax provision is required. It is intended that the Portfolio's assets will be managed so an investor in the Portfolio can satisfy the requirements of Subchapter M of the Internal Revenue Code. (d) Security transactions and investment income -- Security transactions are accounted for on the date the securities are purchased or sold (the trade dates). Realized gains and losses on security transactions are determined on the identified cost basis. Dividend income is recorded on the ex-dividend dates. Dividends from foreign securities where the ex-dividend date may have passed are subsequently recorded when the Portfolio has determined the ex-dividend date. Interest income is recognized on the accrual basis. (e) Securities lending -- Each Portfolio may lend securities to financial institutions that provide cash or securities issued or guaranteed by the U.S. government as collateral, which will be maintained at all times in an amount equal to at least 100% of the current market value of the loaned securities. The market value of the loaned securities is determined at the close of business of the Portfolio and any additional required collateral is delivered to the Portfolio on the next business day. Where the Portfolio receives securities as collateral for the loaned securities, it receives a fee from the borrower. The Portfolio typically receives the income on the loaned securities, but does not receive the income on the collateral. Where the Portfolio receives cash collateral, it may invest such collateral and retain the amount earned on such investment, net of any amount rebated to the borrower. Loans of securities are terminable at any time and the borrower, after notice, is required to return borrowed securities within five business days. The Portfolio may pay reasonable finders, lending agent, administrative and custodial fees in connection with its loans. In the event that the borrower defaults on its obligation to return borrowed securities because of insolvency or for any other reason, the Portfolio could experience delays and costs in gaining access to the collateral. The Portfolio also could suffer a loss where the value of the collateral falls below the market value of the borrowed securities, in the event of borrower default or in the event of losses on investments made with cash collateral. (f) Bank overdraft Master Large Cap Core Portfolio The Portfolio recorded a bank overdraft, which resulted from management estimates of available cash. Master Large Cap Value Portfolio The Portfolio recorded a bank overdraft, which resulted from management estimates of available cash. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 61 Notes to Financial Statements (continued) Master Large Cap Series Trust (g) Recent accounting pronouncements -- In July 2006, the Financial Accounting Standards Board ("FASB") issued Interpretation No. 48 ("FIN 48"), "Accounting for Uncertainty in Income Taxes -- an interpretation of FASB Statement No. 109." FIN 48 prescribes the minimum recognition threshold a tax position must meet in connection with accounting for uncertainties in income tax positions taken or expected to be taken by an entity, including mutual funds, before being measured and recognized in the financial statements. Adoption of FIN 48 is required for the last net asset value calculation in the first required financial statement reporting period for fiscal years beginning after December 15, 2006. The impact on the Portfolios' financial statements, if any, is currently being assessed. In September 2006, "Statement of Financial Accounting Standards No. 157, Fair Value Measurements" ("FAS 157"), was issued and is effective for fiscal years beginning after November 15, 2007. FAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. At this time, management is evaluating the implications of FAS 157 and its impact on the Portfolios' financial statements, if any, has not been determined. In addition, in February 2007, FASB issued "Statement of Financial Accounting Standards No. 159, The Fair Value Option for Financial Assets and Financial Liabilities" ("FAS 159"), which is effective for fiscal years beginning after November 15, 2007. Early adoption is permitted as of the beginning of a fiscal year that begins on or before November 15, 2007, provided the entity also elects to apply the provisions of FAS 157. FAS 159 permits entities to choose to measure many financial instruments and certain other items at fair value that are not currently required to be measured at fair value. FAS 159 also establishes presentation and disclosure requirements designed to facilitate comparisons between entities that choose different measurement attributes for similar types of assets and liabilities. At this time, management is evaluating the implications of FAS 159 and its impact on the Portfolios' financial statements, if any, has not been determined. 2. Investment Advisory Agreement and Transactions with Affiliates: The Investment Advisory Agreement between the Trust, on behalf of each Portfolio, and the Manager became effective on September 29, 2006. Prior to September 29, 2006, Fund Asset Management, L.P. ("FAM") was the Portfolio's manager. The general partner of FAM is Princeton Services, Inc. ("PSI"), an indirect, wholly owned subsidiary of Merrill Lynch & Co., Inc. ("Merrill Lynch"), which is the limited partner. Merrill Lynch and The PNC Financial Services Group, Inc. are the principal owners of BlackRock, Inc. The Manager is responsible for the management of each Portfolio's investments and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Portfolio. Master Large Cap Core Portfolio pays a monthly fee at an annual rate of .50% of the average daily net assets not exceeding $1 billion, .45% of average daily net assets in excess of $1 billion but not exceeding $5 billion and .40% of average daily net assets in excess of $5 billion; Master Large Cap Growth Portfolio pays a monthly fee at an annual rate of .50% of the average daily net assets not exceeding $5 billion and ..45% of average daily net assets in excess of $5 billion; and Master Large Cap Value Portfolio pays a monthly fee at an annual rate of .50% of the average daily net assets not exceeding $3 billion and .45% of average daily net assets in excess of $3 billion. In addition, the Manager has entered into a sub-advisory agreement with BlackRock Investment Management, LLC ("BIM"), an affiliate of the Manager, under which the Manager pays BIM for services it provides to each Portfolio a monthly fee at an annual rate equal to a percentage of the management fee paid by the Portfolio to the Manager. The Portfolios have received an exemptive order from the Securities and Exchange Commission permitting it to lend portfolio securities to Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), a wholly owned subsidiary of Merrill Lynch, or its affiliates. As of April 30, 2007, Master Large Cap Core Portfolio, Master Large Cap Growth Portfolio and Master Large Cap Value Portfolio lent securities with values of $275,443,584, $46,057,217 and $372,108,635, respectively, to MLPF&S or its affiliates. Pursuant to that order, the Portfolios have retained BIM as the securities lending agent for a fee based on a share of the returns on 62 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Notes to Financial Statements (concluded) Master Large Cap Series Trust investment of cash collateral. Prior to September 29, 2006, BIM was organized as Merrill Lynch Investment Managers, LLC ("MLIM, LLC"), an affiliate of FAM, and MLIM, LLC was the securities lending agent. BIM may, on behalf of the Portfolios, invest cash collateral received by the Portfolios for such loans, among other things, in a private investment company managed by the Manager or in registered money market funds advised by the Manager or its affiliates. For the six months ended April 30, 2007, BIM received $195,547, $30,132 and $136,926 in securities lending agent fees for Master Large Cap Core Portfolio, Master Large Cap Growth Portfolio and Master Large Cap Value Portfolio, respectively. In addition, MLPF&S received $2,750 in commissions on the execution of portfolio security transactions for the Master Large Cap Value Portfolio for the six months ended April 30, 2007. The Portfolios reimbursed the Manager for certain accounting services. The reimbursements were as follows: - -------------------------------------------------------------------------------- For the Six Months Ended April 30, 2007 - -------------------------------------------------------------------------------- Master Large Cap Core Portfolio ................................. $21,161 Master Large Cap Growth Portfolio ............................... $ 6,104 Master Large Cap Value Portfolio ................................ $28,159 - -------------------------------------------------------------------------------- Certain officers and/or trustees of the Trust are officers and/or directors of BlackRock, Inc. or its affiliates. 3. Investments: Purchases and sales of investments, excluding short-term securities, for the six months ended April 30, 2007 were as follows: - -------------------------------------------------------------------------------- Total Purchases Total Sales - -------------------------------------------------------------------------------- Master Large Cap Core Portfolio ........................... $1,610,219,797 $1,473,584,141 Master Large Cap Growth Portfolio ......................... $ 472,602,379 $ 349,621,917 Master Large Cap Value Portfolio .......................... $1,708,677,248 $1,183,782,579 - -------------------------------------------------------------------------------- 4. Short-Term Borrowings: Each Portfolio, along with certain other funds managed by the Manager and its affiliates, is party to a $500,000,000 credit agreement with a group of lenders. The Portfolio may borrow under the credit agreement to fund shareholder redemptions and for other lawful purposes other than for leverage. The Portfolio may borrow up to the maximum amount allowable under the Portfolio's current prospectus and statement of additional information, subject to various other legal, regulatory or contractual limits. On November 22, 2006, the credit agreement was renewed for one year under substantially the same terms. The Portfolio pays a commitment fee of .06% per annum based on the Portfolio's pro rata share of the unused portion of the credit agreement. Amounts borrowed under the credit agreement bear interest at a rate equal to, at each fund's election, the federal funds rate plus .35% or a base rate as defined in the credit agreement. None of the Portfolios borrowed under the credit agreement during the six months ended April 30, 2007. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 63 BlackRock Funds BlackRock Privacy Principles BlackRock is committed to maintaining the privacy of its current and former fund investors and individual clients (collectively, "Clients") and to safeguarding their non-public personal information. The following information is provided to help you understand what personal information BlackRock collects, how we protect that information and why in certain cases we share such information with select parties. If you are located in a jurisdiction where specific laws, rules or regulations require BlackRock to provide you with additional or different privacy-related rights beyond what is set forth below, then BlackRock will comply with those specific laws, rules or regulations. BlackRock obtains or verifies personal non-public information from and about you from different sources, including the following: (i) information we receive from you or, if applicable, your financial intermediary, on applications, forms or other documents; (ii) information about your transactions with us, our affiliates, or others; (iii) information we receive from a consumer reporting agency; and (iv) from visits to our Web sites. BlackRock does not sell or disclose to non-affiliated third parties any non-public personal information about its Clients, except as permitted by law or as is necessary to respond to regulatory requests or to service Client accounts. These non-affiliated third parties are required to protect the confidentiality and security of this information and to use it only for its intended purpose. We may share information with our affiliates to service your account or to provide you with information about other BlackRock products or services that may be of interest to you. In addition, BlackRock restricts access to non-public personal information about its Clients to those BlackRock employees with a legitimate business need for the information. BlackRock maintains physical, electronic and procedural safeguards that are designed to protect the non-public personal information of its Clients, including procedures relating to the proper storage and disposal of such information. Availability of Additional Information Electronic copies of most financial reports and prospectuses are available on the Funds' Web site or shareholders can sign up for e-mail notifications of quarterly statements, annual and semi-annual reports and prospectuses by enrolling in the Funds' electronic delivery program. To enroll: Shareholders Who Hold Accounts with Investment Advisers, Banks or Brokerages: Please contact your financial advisor. Please note that not all investment advisers, banks or brokerages may offer this service. Shareholders Who Hold Accounts Directly with BlackRock: 1) Access the BlackRock Web site at http://www.blackrock.com/edelivery 2) Select eDelivery under the More Information section 3) Log into your account The Funds will mail only one copy of shareholder documents, including prospectuses, annual and semi-annual reports and proxy statements, to shareholders with multiple accounts at the same address. This practice is commonly called "householding" and it is intended to reduce expenses and eliminate duplicate mailings of shareholder documents. 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 the Fund at (800) 441-7762. 64 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 Availability of Additional Information (concluded) Availability of Proxy Voting Policies and Procedures The Funds/Trusts have delegated proxy voting responsibilities to BlackRock and its affiliates, subject to the general oversight of the Funds'/Trusts' Board of Directors/Trustees. A description of the policies and procedures that BlackRock and its affiliates use to determine how to vote proxies relating to portfolio securities is available without charge, upon request, on our Web site at www.blackrock.com, by calling (800) 441-7762, or on the Web site of the Securities and Exchange Commission (the "Commission") at http://www.sec.gov. Availability of Proxy Voting Record Information on how proxies relating to the Funds' voting securities were voted (if any) by Funds'/Trusts' previous manager during the most recent 12-month period ended June 30 is available, upon request and without charge, on our Web site at www.blackrock.com, by calling (800) 441-7762 or on the Web site of the Commission at http://www.sec.gov. Availability of Quarterly Portfolio Schedule The Funds/Trusts file their complete schedules of portfolio holdings for the first and third quarters of their fiscal year with the Commission on Form N-Q. The Funds'/Trusts' Forms N-Q are available on the Commission's Web site at http://www.sec.gov and may be reviewed and copied at the Commission's Public Reference Room in Washington, D.C. Information regarding the operation of the Public Reference Room may be obtained by calling (800) SEC-0330. The Funds'/Trusts' Forms N-Q may also be obtained upon request, without charge, by calling (800) 441-7762. Shareholder Privileges Account Information Call us at (800) 441-7762 8:00 AM - 6:00 PM EST to get information about your account balances, recent transactions and share prices. You can also reach us on the web at www.blackrock.com. Automatic Investment Plans Investor Class shareholders who want to invest regularly can arrange to have $50 or more automatically deducted from their checking or savings account and invested in any of the BlackRock portfolios. Systematic Withdrawal Plans Investor Class shareholders can establish a systematic withdrawal plan and receive periodic payments of $50 or more from their BlackRock portfolios, as long as their account is at least $10,000. Retirement Plans Shareholders may make investments in conjunction with Traditional, Rollover, Roth, Coverdell, Simple IRAs, SEP IRAs and 403(b) Plans. BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 65 A World-Class Mutual Fund Family BlackRock offers a diverse lineup of open-end mutual funds crossing all investment styles and managed by experts in equity, fixed income and tax-exempt investing. Equity Funds BlackRock All-Cap Global Resources Portfolio BlackRock Aurora Portfolio BlackRock Asset Allocation Portfolio+ BlackRock Balanced Capital Fund+ BlackRock Basic Value Fund BlackRock Capital Appreciation Portfolio BlackRock Developing Capital Markets Fund BlackRock Equity Dividend Fund BlackRock EuroFund BlackRock Focus Twenty Fund BlackRock Focus Value Fund BlackRock Fundamental Growth Fund BlackRock Global Allocation Fund+ BlackRock Global Dynamic Equity Fund BlackRock Global Financial Services Fund BlackRock Global Growth Fund BlackRock Global Opportunities Portfolio BlackRock Global Resources Portfolio* BlackRock Global Science & Technology Opportunities Portfolio BlackRock Global SmallCap Fund BlackRock Global Technology Fund BlackRock Healthcare Fund BlackRock Health Sciences Opportunities Portfolio BlackRock Index Equity Portfolio* BlackRock International Fund BlackRock International Index Fund BlackRock International Opportunities Portfolio* BlackRock International Value Fund BlackRock Investment Trust BlackRock Large Cap Core Fund BlackRock Large Cap Growth Fund BlackRock Large Cap Value Fund BlackRock Latin America Fund BlackRock Mid-Cap Growth Equity Portfolio BlackRock Mid-Cap Value Equity Portfolio BlackRock Mid Cap Value Opportunities Fund BlackRock Natural Resources Trust BlackRock Pacific Fund BlackRock Small Cap Core Equity Portfolio BlackRock Small Cap Growth Equity Portfolio BlackRock Small Cap Growth Fund II BlackRock Small Cap Index Fund BlackRock Small Cap Value Equity Portfolio* BlackRock Small/Mid-Cap Growth Portfolio BlackRock S&P 500 Index Fund BlackRock U.S. Opportunities Portfolio BlackRock Utilities and Telecommunications Fund BlackRock Value Opportunities Fund Fixed Income Funds BlackRock Bond Fund BlackRock Commodity Strategies Fund BlackRock Enhanced Income Portfolio BlackRock GNMA Portfolio BlackRock Government Income Portfolio BlackRock High Income Fund BlackRock High Yield Bond Portfolio BlackRock Inflation Protected Bond Portfolio BlackRock Intermediate Bond Portfolio II BlackRock Intermediate Government Bond Portfolio BlackRock International Bond Portfolio BlackRock Low Duration Bond Portfolio BlackRock Managed Income Portfolio BlackRock Short-Term Bond Fund BlackRock Total Return Portfolio BlackRock Total Return Portfolio II BlackRock World Income Fund Municipal Bond Funds BlackRock AMT-Free Municipal Bond Portfolio BlackRock California Insured Municipal Bond Fund BlackRock Delaware Municipal Bond Portfolio BlackRock Florida Municipal Bond Fund BlackRock High Yield Municipal Fund BlackRock Intermediate Municipal Fund BlackRock Kentucky Municipal Bond Portfolio BlackRock Municipal Insured Fund BlackRock National Municipal Fund BlackRock New Jersey Municipal Bond Fund BlackRock New York Municipal Bond Fund BlackRock Ohio Municipal Bond Portfolio BlackRock Pennsylvania Municipal Bond Fund BlackRock Short-Term Municipal Fund Target Risk & Target Date Funds BlackRock Prepared Portfolios Conservative Prepared Portfolio Moderate Prepared Portfolio Growth Prepared Portfolio Aggressive Growth Prepared Portfolio BlackRock Lifecycle Prepared Portfolios Prepared Portfolio 2010 Prepared Portfolio 2015 Prepared Portfolio 2020 Prepared Portfolio 2025 Prepared Portfolio 2030 Prepared Portfolio 2035 Prepared Portfolio 2040 Prepared Portfolio 2045 Prepared Portfolio 2050 * See the prospectus for information on specific limitations on investments in the fund. + Mixed asset fund. BlackRock mutual funds are distributed by BlackRock Distributors, Inc. and certain funds are also distributed by FAM Distributors, Inc. You should consider the investment objectives, risks, charges and expenses of the funds under consideration carefully before investing. Each fund's prospectus contains this and other information and is available at www.blackrock.com or by calling 800-882-0052 or from your financial advisor. The prospectus should be read carefully before investing. 66 BLACKROCK LARGE CAP SERIES FUNDS, INC. APRIL 30, 2007 These reports are transmitted to shareholders only. The reports are not authorized for use as an offer of sale or a solicitation of an offer to buy shares of the Funds unless accompanied or preceded by the Funds' current prospectus. Past performance results shown in these reports should not be considered a representation of future performance. Investment returns and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Statements and other information herein are as dated and are subject to change. BLACKROCK #CAPSERIES-4/07 Item 2 - Code of Ethics - Not Applicable to this semi-annual report Item 3 - Audit Committee Financial Expert - Not Applicable to this semi-annual report Item 4 - Principal Accountant Fees and Services - Not Applicable to this semi-annual report Item 5 - Audit Committee of Listed Registrants - Not Applicable Item 6 - Schedule of Investments - The registrant's Schedule of Investments is included as part of the Report to Stockholders filed under Item 1 of this form. Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies - Not Applicable Item 8 - Portfolio Managers of Closed-End Management Investment Companies - Not Applicable Item 9 - Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers - Not Applicable Item 10 - Submission of Matters to a Vote of Security Holders - The registrant's Nominating Committee will consider nominees to the Board recommended by shareholders when a vacancy becomes available. Shareholders who wish to recommend a nominee should send nominations which include biographical information and set forth the qualifications of the proposed nominee to the registrant's Secretary. There have been no material changes to these procedures. Item 11 - Controls and Procedures 11(a) - The registrant's principal executive and principal financial officers or persons performing similar functions have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act")) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 15d-15(b) under the Securities and Exchange Act of 1934, as amended. 11(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17 CFR 270.30a-3(d)) that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12 - Exhibits attached hereto 12(a)(1) - Code of Ethics - Not Applicable to this semi-annual report 12(a)(2) - Certifications - Attached hereto 12(a)(3) - Not Applicable 12(b) - Certifications - Attached hereto Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. BlackRock Large Cap Series Funds, Inc. and BlackRock Large Cap Series Trust By: /s/ Robert C. Doll, Jr. -------------------------- Robert C. Doll, Jr., Chief Executive Officer of BlackRock Large Cap Series Funds, Inc. and BlackRock Large Cap Series Trust Date: June 19, 2007 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Robert C. Doll, Jr. -------------------------- Robert C. Doll, Jr., Chief Executive Officer of BlackRock Large Cap Series Funds, Inc. and BlackRock Large Cap Series Trust Date: June 19, 2007 By: /s/ Donald C. Burke -------------------------- Donald C. Burke, Chief Financial Officer of BlackRock Large Cap Series Funds, Inc. and BlackRock Large Cap Series Trust Date: June 19, 2007