v3.26.1
Shareholder Report
 12 Months Ended
May 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name BlackRock Large Cap Focus Growth Fund, Inc.
Entity Central Index Key 0001097293
Entity Investment Company Type N-1A
Document Period End Date May 31, 2026
C000213874 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Large Cap Focus Growth Fund, Inc.
Class Name Class K Shares
Trading Symbol MKFOX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BlackRock Large Cap Focus Growth Fund, Inc. (the “Fund”) for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last year?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $71 0.62%
Expenses Paid, Amount $ 71
Expense Ratio, Percent 0.62%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
  • For the reporting period ended May 31, 2026, the Fund's Class K Shares returned 29.06%.
  • For the same period, the Fund’s benchmark, the Russell 1000 Index returned 28.85% and the Russell 1000 Growth Index returned 28.66%.
What contributed to performance?
Positive contributions to the Fund’s performance over the period were led by stock selection in the information technology and consumer discretionary sectors, along with positioning in communication services. Within information technology, exposure to the semiconductors & semiconductor equipment industry contributed significantly to performance, most notably positions in Nvidia Corp. and Broadcom Inc., along with an off-benchmark position in Intel Corp. In consumer discretionary, Amazon.com Inc. within the broadline retail industry was a notable contributor as the company benefited from continued strength in its e-commerce and cloud computing businesses. Lastly, within communication services, exposure to Google parent Alphabet Inc. in the interactive media & services industry added to return, supported by resilient advertising demand, continued growth in cloud services and increasing investor enthusiasm around the company’s AI initiatives.
What detracted from performance?
The largest detractors from performance over the period included stock selection in the financials sector, along with positioning in the materials and real estate sectors. Within financials, positions in Capital One Financial Corp. within the consumer finance industry and Visa Inc. within the financial services industry detracted as investor concerns regarding consumer credit trends, regulatory developments and slowing growth expectations weighed on both stocks. Within materials, positions in Newmont Corp. and Wheaton Precious Metals Corp., both in the metals & mining industry, weighed on performance as fluctuations in commodity prices and an investor rotation toward higher-growth sectors pressured both stocks. Lastly, within real estate, holdings of CoStar Group Inc. within the real estate management & development industry detracted from performance.
The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Line Graph [Table Text Block]
Fund performance
Cumulative performance: June 1, 2016 through May 31, 2026
Initial investment of $10,000
Fund Performance - Growth of 10K
See “Average annual total returns” for additional information on fund performance.
Average Annual Return [Table Text Block]
Average annual total returns
1 Year 5 Years 10 Years
Class K Shares 29.06 % 12.62 % 17.55 %
Russell 1000 Index 28.85 13.33 15.38
Russell 1000 Growth Index 28.66 15.73 18.86
Performance Inception Date Nov. 25, 2019
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Material Change Date Sep. 26, 2025
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,859,957,825
Holdings Count | Holding 36
Advisory Fees Paid, Amount $ 8,328,776
Investment Company Portfolio Turnover 99.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,859,957,825
Number of Portfolio Holdings 36
Net Investment Advisory Fees $8,328,776
Portfolio Turnover Rate 99%
Holdings [Text Block]
What did the Fund invest in?
(as of May 31, 2026)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 55.7 %
Industrials 13.3 %
Communication Services 11.0 %
Consumer Discretionary 8.9 %
Real Estate 3.9 %
Health Care 2.8 %
Materials 2.1 %
Consumer Staples 0.8 %
Energy 0.7 %
Short-Term Securities 0.9 %
Liabilities in Excess of Other Assets (0.1 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 13.5 %
Amazon.com, Inc. 8.0 %
Microsoft Corp. 5.7 %
Apple Inc. 5.7 %
Broadcom, Inc. 5.3 %
Alphabet, Inc., Class A 5.1 %
Datadog, Inc., Class A 4.1 %
Meta Platforms, Inc., Class A 3.8 %
Eli Lilly & Co. 2.8 %
Quanta Services, Inc. 2.8 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 13.5 %
Amazon.com, Inc. 8.0 %
Microsoft Corp. 5.7 %
Apple Inc. 5.7 %
Broadcom, Inc. 5.3 %
Alphabet, Inc., Class A 5.1 %
Datadog, Inc., Class A 4.1 %
Meta Platforms, Inc., Class A 3.8 %
Eli Lilly & Co. 2.8 %
Quanta Services, Inc. 2.8 %
(b)Excludes short-term securities.
Material Fund Change [Text Block]
Material fund changes
This is a summary of certain changes to the Fund since May 31, 2025. For more complete information, you may review the Fund’s next prospectus, which we expect to be available approximately 120 days after May 31, 2026 at blackrock.com/fundreports or upon request by contacting us at (800) 441-7762.
The Fund’s Board approved changes to the Fund’s investment strategy and investment process to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap growth equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. These changes became effective on September 26, 2025.
Material Fund Change Strategies [Text Block]
The Fund’s Board approved changes to the Fund’s investment strategy and investment process to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap growth equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. These changes became effective on September 26, 2025.
Summary of Change Legend [Text Block]
This is a summary of certain changes to the Fund since May 31, 2025. For more complete information, you may review the Fund’s next prospectus, which we expect to be available approximately 120 days after May 31, 2026 at blackrock.com/fundreports or upon request by contacting us at (800) 441-7762.
Updated Prospectus Phone Number (800) 441-7762
Updated Prospectus Web Address blackrock.com/fundreports
C000006153 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Large Cap Focus Growth Fund, Inc.
Class Name Investor C Shares
Trading Symbol MCFOX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BlackRock Large Cap Focus Growth Fund, Inc. (the “Fund”) for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last year?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $190 1.67%
Expenses Paid, Amount $ 190
Expense Ratio, Percent 1.67%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
  • For the reporting period ended May 31, 2026, the Fund's Investor C Shares returned 27.76%.
  • For the same period, the Fund’s benchmark, the Russell 1000 Index returned 28.85% and the Russell 1000 Growth Index returned 28.66%.
What contributed to performance?
Positive contributions to the Fund’s performance over the period were led by stock selection in the information technology and consumer discretionary sectors, along with positioning in communication services. Within information technology, exposure to the semiconductors & semiconductor equipment industry contributed significantly to performance, most notably positions in Nvidia Corp. and Broadcom Inc., along with an off-benchmark position in Intel Corp. In consumer discretionary, Amazon.com Inc. within the broadline retail industry was a notable contributor as the company benefited from continued strength in its e-commerce and cloud computing businesses. Lastly, within communication services, exposure to Google parent Alphabet Inc. in the interactive media & services industry added to return, supported by resilient advertising demand, continued growth in cloud services and increasing investor enthusiasm around the company’s AI initiatives.
What detracted from performance?
The largest detractors from performance over the period included stock selection in the financials sector, along with positioning in the materials and real estate sectors. Within financials, positions in Capital One Financial Corp. within the consumer finance industry and Visa Inc. within the financial services industry detracted as investor concerns regarding consumer credit trends, regulatory developments and slowing growth expectations weighed on both stocks. Within materials, positions in Newmont Corp. and Wheaton Precious Metals Corp., both in the metals & mining industry, weighed on performance as fluctuations in commodity prices and an investor rotation toward higher-growth sectors pressured both stocks. Lastly, within real estate, holdings of CoStar Group Inc. within the real estate management & development industry detracted from performance.
The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Line Graph [Table Text Block]
Fund performance
Cumulative performance: June 1, 2016 through May 31, 2026
Initial investment of $10,000
Fund Performance - Growth of 10K
See “Average annual total returns” for additional information on fund performance.
Average Annual Return [Table Text Block]
Average annual total returns
1 Year 5 Years 10 Years
Investor C Shares 27.76 % 11.45 % 16.52 %
Investor C Shares (with sales charge) 26.77 11.45 16.52
Russell 1000 Index 28.85 13.33 15.38
Russell 1000 Growth Index 28.66 15.73 18.86
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Material Change Date Sep. 26, 2025
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,859,957,825
Holdings Count | Holding 36
Advisory Fees Paid, Amount $ 8,328,776
Investment Company Portfolio Turnover 99.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,859,957,825
Number of Portfolio Holdings 36
Net Investment Advisory Fees $8,328,776
Portfolio Turnover Rate 99%
Holdings [Text Block]
What did the Fund invest in?
(as of May 31, 2026)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 55.7 %
Industrials 13.3 %
Communication Services 11.0 %
Consumer Discretionary 8.9 %
Real Estate 3.9 %
Health Care 2.8 %
Materials 2.1 %
Consumer Staples 0.8 %
Energy 0.7 %
Short-Term Securities 0.9 %
Liabilities in Excess of Other Assets (0.1 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 13.5 %
Amazon.com, Inc. 8.0 %
Microsoft Corp. 5.7 %
Apple Inc. 5.7 %
Broadcom, Inc. 5.3 %
Alphabet, Inc., Class A 5.1 %
Datadog, Inc., Class A 4.1 %
Meta Platforms, Inc., Class A 3.8 %
Eli Lilly & Co. 2.8 %
Quanta Services, Inc. 2.8 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 13.5 %
Amazon.com, Inc. 8.0 %
Microsoft Corp. 5.7 %
Apple Inc. 5.7 %
Broadcom, Inc. 5.3 %
Alphabet, Inc., Class A 5.1 %
Datadog, Inc., Class A 4.1 %
Meta Platforms, Inc., Class A 3.8 %
Eli Lilly & Co. 2.8 %
Quanta Services, Inc. 2.8 %
(b)Excludes short-term securities.
Material Fund Change [Text Block]
Material fund changes
This is a summary of certain changes to the Fund since May 31, 2025. For more complete information, you may review the Fund’s next prospectus, which we expect to be available approximately 120 days after May 31, 2026 at blackrock.com/fundreports or upon request by contacting us at (800) 441-7762.
The Fund’s Board approved changes to the Fund’s investment strategy and investment process to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap growth equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. These changes became effective on September 26, 2025.
Material Fund Change Strategies [Text Block]
The Fund’s Board approved changes to the Fund’s investment strategy and investment process to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap growth equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. These changes became effective on September 26, 2025.
Summary of Change Legend [Text Block]
This is a summary of certain changes to the Fund since May 31, 2025. For more complete information, you may review the Fund’s next prospectus, which we expect to be available approximately 120 days after May 31, 2026 at blackrock.com/fundreports or upon request by contacting us at (800) 441-7762.
Updated Prospectus Phone Number (800) 441-7762
Updated Prospectus Web Address blackrock.com/fundreports
C000006151 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Large Cap Focus Growth Fund, Inc.
Class Name Investor A Shares
Trading Symbol MDFOX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BlackRock Large Cap Focus Growth Fund, Inc. (the “Fund”) for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last year?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $105 0.92%
Expenses Paid, Amount $ 105
Expense Ratio, Percent 0.92%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
  • For the reporting period ended May 31, 2026, the Fund's Investor A Shares returned 28.76%.
  • For the same period, the Fund’s benchmark, the Russell 1000 Index returned 28.85% and the Russell 1000 Growth Index returned 28.66%.
What contributed to performance?
Positive contributions to the Fund’s performance over the period were led by stock selection in the information technology and consumer discretionary sectors, along with positioning in communication services. Within information technology, exposure to the semiconductors & semiconductor equipment industry contributed significantly to performance, most notably positions in Nvidia Corp. and Broadcom Inc., along with an off-benchmark position in Intel Corp. In consumer discretionary, Amazon.com Inc. within the broadline retail industry was a notable contributor as the company benefited from continued strength in its e-commerce and cloud computing businesses. Lastly, within communication services, exposure to Google parent Alphabet Inc. in the interactive media & services industry added to return, supported by resilient advertising demand, continued growth in cloud services and increasing investor enthusiasm around the company’s AI initiatives.
What detracted from performance?
The largest detractors from performance over the period included stock selection in the financials sector, along with positioning in the materials and real estate sectors. Within financials, positions in Capital One Financial Corp. within the consumer finance industry and Visa Inc. within the financial services industry detracted as investor concerns regarding consumer credit trends, regulatory developments and slowing growth expectations weighed on both stocks. Within materials, positions in Newmont Corp. and Wheaton Precious Metals Corp., both in the metals & mining industry, weighed on performance as fluctuations in commodity prices and an investor rotation toward higher-growth sectors pressured both stocks. Lastly, within real estate, holdings of CoStar Group Inc. within the real estate management & development industry detracted from performance.
The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Line Graph [Table Text Block]
Fund performance
Cumulative performance: June 1, 2016 through May 31, 2026
Initial investment of $10,000
Fund Performance - Growth of 10K
See “Average annual total returns” for additional information on fund performance.
Average Annual Return [Table Text Block]
Average annual total returns
1 Year 5 Years 10 Years
Investor A Shares 28.76 % 12.31 % 17.21 %
Investor A Shares (with sales charge) 22.00 11.11 16.58
Russell 1000 Index 28.85 13.33 15.38
Russell 1000 Growth Index 28.66 15.73 18.86
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Material Change Date Sep. 26, 2025
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,859,957,825
Holdings Count | Holding 36
Advisory Fees Paid, Amount $ 8,328,776
Investment Company Portfolio Turnover 99.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,859,957,825
Number of Portfolio Holdings 36
Net Investment Advisory Fees $8,328,776
Portfolio Turnover Rate 99%
Holdings [Text Block]
What did the Fund invest in?
(as of May 31, 2026)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 55.7 %
Industrials 13.3 %
Communication Services 11.0 %
Consumer Discretionary 8.9 %
Real Estate 3.9 %
Health Care 2.8 %
Materials 2.1 %
Consumer Staples 0.8 %
Energy 0.7 %
Short-Term Securities 0.9 %
Liabilities in Excess of Other Assets (0.1 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 13.5 %
Amazon.com, Inc. 8.0 %
Microsoft Corp. 5.7 %
Apple Inc. 5.7 %
Broadcom, Inc. 5.3 %
Alphabet, Inc., Class A 5.1 %
Datadog, Inc., Class A 4.1 %
Meta Platforms, Inc., Class A 3.8 %
Eli Lilly & Co. 2.8 %
Quanta Services, Inc. 2.8 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 13.5 %
Amazon.com, Inc. 8.0 %
Microsoft Corp. 5.7 %
Apple Inc. 5.7 %
Broadcom, Inc. 5.3 %
Alphabet, Inc., Class A 5.1 %
Datadog, Inc., Class A 4.1 %
Meta Platforms, Inc., Class A 3.8 %
Eli Lilly & Co. 2.8 %
Quanta Services, Inc. 2.8 %
(b)Excludes short-term securities.
Material Fund Change [Text Block]
Material fund changes
This is a summary of certain changes to the Fund since May 31, 2025. For more complete information, you may review the Fund’s next prospectus, which we expect to be available approximately 120 days after May 31, 2026 at blackrock.com/fundreports or upon request by contacting us at (800) 441-7762.
The Fund’s Board approved changes to the Fund’s investment strategy and investment process to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap growth equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. These changes became effective on September 26, 2025.
Material Fund Change Strategies [Text Block]
The Fund’s Board approved changes to the Fund’s investment strategy and investment process to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap growth equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. These changes became effective on September 26, 2025.
Summary of Change Legend [Text Block]
This is a summary of certain changes to the Fund since May 31, 2025. For more complete information, you may review the Fund’s next prospectus, which we expect to be available approximately 120 days after May 31, 2026 at blackrock.com/fundreports or upon request by contacting us at (800) 441-7762.
Updated Prospectus Phone Number (800) 441-7762
Updated Prospectus Web Address blackrock.com/fundreports
C000006154 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Large Cap Focus Growth Fund, Inc.
Class Name Institutional Shares
Trading Symbol MAFOX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BlackRock Large Cap Focus Growth Fund, Inc. (the “Fund”) for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last year?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $77 0.67%
Expenses Paid, Amount $ 77
Expense Ratio, Percent 0.67%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
  • For the reporting period ended May 31, 2026, the Fund's Institutional Shares returned 29.03%.
  • For the same period, the Fund’s benchmark, the Russell 1000 Index returned 28.85% and the Russell 1000 Growth Index returned 28.66%.
What contributed to performance?
Positive contributions to the Fund’s performance over the period were led by stock selection in the information technology and consumer discretionary sectors, along with positioning in communication services. Within information technology, exposure to the semiconductors & semiconductor equipment industry contributed significantly to performance, most notably positions in Nvidia Corp. and Broadcom Inc., along with an off-benchmark position in Intel Corp. In consumer discretionary, Amazon.com Inc. within the broadline retail industry was a notable contributor as the company benefited from continued strength in its e-commerce and cloud computing businesses. Lastly, within communication services, exposure to Google parent Alphabet Inc. in the interactive media & services industry added to return, supported by resilient advertising demand, continued growth in cloud services and increasing investor enthusiasm around the company’s AI initiatives.
What detracted from performance?
The largest detractors from performance over the period included stock selection in the financials sector, along with positioning in the materials and real estate sectors. Within financials, positions in Capital One Financial Corp. within the consumer finance industry and Visa Inc. within the financial services industry detracted as investor concerns regarding consumer credit trends, regulatory developments and slowing growth expectations weighed on both stocks. Within materials, positions in Newmont Corp. and Wheaton Precious Metals Corp., both in the metals & mining industry, weighed on performance as fluctuations in commodity prices and an investor rotation toward higher-growth sectors pressured both stocks. Lastly, within real estate, holdings of CoStar Group Inc. within the real estate management & development industry detracted from performance.
The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Line Graph [Table Text Block]
Fund performance
Cumulative performance: June 1, 2016 through May 31, 2026
Initial investment of $10,000
Fund Performance - Growth of 10K
See “Average annual total returns” for additional information on fund performance.
Average Annual Return [Table Text Block]
Average annual total returns
1 Year 5 Years 10 Years
Institutional Shares 29.03 % 12.56 % 17.50 %
Russell 1000 Index 28.85 13.33 15.38
Russell 1000 Growth Index 28.66 15.73 18.86
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Material Change Date Sep. 26, 2025
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,859,957,825
Holdings Count | Holding 36
Advisory Fees Paid, Amount $ 8,328,776
Investment Company Portfolio Turnover 99.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,859,957,825
Number of Portfolio Holdings 36
Net Investment Advisory Fees $8,328,776
Portfolio Turnover Rate 99%
Holdings [Text Block]
What did the Fund invest in?
(as of May 31, 2026)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 55.7 %
Industrials 13.3 %
Communication Services 11.0 %
Consumer Discretionary 8.9 %
Real Estate 3.9 %
Health Care 2.8 %
Materials 2.1 %
Consumer Staples 0.8 %
Energy 0.7 %
Short-Term Securities 0.9 %
Liabilities in Excess of Other Assets (0.1 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 13.5 %
Amazon.com, Inc. 8.0 %
Microsoft Corp. 5.7 %
Apple Inc. 5.7 %
Broadcom, Inc. 5.3 %
Alphabet, Inc., Class A 5.1 %
Datadog, Inc., Class A 4.1 %
Meta Platforms, Inc., Class A 3.8 %
Eli Lilly & Co. 2.8 %
Quanta Services, Inc. 2.8 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 13.5 %
Amazon.com, Inc. 8.0 %
Microsoft Corp. 5.7 %
Apple Inc. 5.7 %
Broadcom, Inc. 5.3 %
Alphabet, Inc., Class A 5.1 %
Datadog, Inc., Class A 4.1 %
Meta Platforms, Inc., Class A 3.8 %
Eli Lilly & Co. 2.8 %
Quanta Services, Inc. 2.8 %
(b)Excludes short-term securities.
Material Fund Change [Text Block]
Material fund changes
This is a summary of certain changes to the Fund since May 31, 2025. For more complete information, you may review the Fund’s next prospectus, which we expect to be available approximately 120 days after May 31, 2026 at blackrock.com/fundreports or upon request by contacting us at (800) 441-7762.
The Fund’s Board approved changes to the Fund’s investment strategy and investment process to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap growth equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. These changes became effective on September 26, 2025.
Material Fund Change Strategies [Text Block]
The Fund’s Board approved changes to the Fund’s investment strategy and investment process to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap growth equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. These changes became effective on September 26, 2025.
Summary of Change Legend [Text Block]
This is a summary of certain changes to the Fund since May 31, 2025. For more complete information, you may review the Fund’s next prospectus, which we expect to be available approximately 120 days after May 31, 2026 at blackrock.com/fundreports or upon request by contacting us at (800) 441-7762.
Updated Prospectus Phone Number (800) 441-7762
Updated Prospectus Web Address blackrock.com/fundreports