Shareholder Report
|
6 Months Ended |
|
Jun. 30, 2026
USD ($)
Holding
|
|---|
| Shareholder Report [Line Items] |
|
|
| Document Type |
N-CSRS
|
|
| Amendment Flag |
false
|
|
| Registrant Name |
BlackRock Funds IV
|
|
| Entity Central Index Key |
0001738074
|
|
| Entity Investment Company Type |
N-1A
|
|
| Document Period End Date |
Jun. 30, 2026
|
|
| C000222461 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Systematic Multi-Strategy Fund
|
|
| Class Name |
Class K Shares
|
|
| Trading Symbol |
BKMBX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Systematic Multi-Strategy Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-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.
|
|
| Additional Information Phone Number |
(800) 441‑7762
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months ? (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 |
$40 |
0.81%(a) |
|
|
| Expenses Paid, Amount |
$ 40
|
|
| Expense Ratio, Percent |
0.81%
|
[1] |
| Net Assets |
$ 7,997,975,058
|
|
| Holdings Count | Holding |
2,952
|
|
| Investment Company Portfolio Turnover |
116.00%
|
|
| Additional Fund Statistics [Text Block] |
| Key Fund statistics |
|
| Net Assets |
$7,997,975,058 |
| Number of Portfolio Holdings |
2,952 |
| Portfolio Turnover Rate |
116% |
|
|
| Holdings [Text Block] |
What did the Fund invest in? (as of June 30, 2026)
| Portfolio composition |
| Asset Type(a)(b) |
Percent of
Net Assets |
|
| Corporate Bonds |
55.8 |
% |
| Non-Agency Mortgage-Backed Securities |
27.2 |
% |
| U.S. Government Sponsored Agency Securities |
11.1 |
% |
| Common Stocks |
8.0 |
% |
| U.S. Treasury Obligations |
2.5 |
% |
| Asset-Backed Securities |
1.3 |
% |
| Capital Trusts |
1.2 |
% |
| Money Market Funds |
0.2 |
% |
| TBA Sale Commitments |
(0.2 |
)% |
| Liabilities in Excess of Other Assets |
(7.1 |
) |
| Industry allocation |
|
Percent of Total
Investments(c) |
| Industry |
Long |
|
Short |
|
Total |
|
| Financials |
12.6 |
% |
3.1 |
% |
15.7 |
% |
| Consumer Discretionary |
7.3 |
% |
4.3 |
% |
11.6 |
% |
| Industrials |
6.2 |
% |
2.5 |
% |
8.7 |
% |
| Health Care |
6.0 |
% |
1.9 |
% |
7.9 |
% |
| Information Technology |
4.7 |
% |
2.8 |
% |
7.5 |
% |
| Energy |
4.5 |
% |
2.4 |
% |
6.9 |
% |
| Consumer Staples |
3.8 |
% |
2.2 |
% |
6.0 |
% |
| Materials |
4.1 |
% |
1.6 |
% |
5.7 |
% |
| Communication Services |
3.7 |
% |
1.3 |
% |
5.0 |
% |
| Utilities |
3.3 |
% |
1.0 |
% |
4.3 |
% |
| Real Estate |
1.8 |
% |
0.6 |
% |
2.4 |
% |
| Other(d) |
18.3 |
% |
— |
% |
18.3 |
% |
|
76.3 |
|
23.7 |
|
100.0 |
|
| (a) |
Excludes underlying investments in equity swaps. |
| (b) |
Excludes short-term securities, short investments and options, if any. |
| (c) |
Include the gross market values of long and short securities of the underlying derivative contracts and excludes short-term securities and options, if any. |
| (d) |
Consist of Asset-Backed Securities (0.6%), Non-Agency Mortgaged-Backed Securities (12.6%) and U.S. Government Sponsored Agency Obligations (5.1%). |
|
|
| C000202322 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Systematic Multi-Strategy Fund
|
|
| Class Name |
Investor C Shares
|
|
| Trading Symbol |
BMBCX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Systematic Multi-Strategy Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-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.
|
|
| Additional Information Phone Number |
(800) 441‑7762
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months ? (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 |
$94 |
1.90%(a) |
|
|
| Expenses Paid, Amount |
$ 94
|
|
| Expense Ratio, Percent |
1.90%
|
[2] |
| Net Assets |
$ 7,997,975,058
|
|
| Holdings Count | Holding |
2,952
|
|
| Investment Company Portfolio Turnover |
116.00%
|
|
| Additional Fund Statistics [Text Block] |
| Key Fund statistics |
|
| Net Assets |
$7,997,975,058 |
| Number of Portfolio Holdings |
2,952 |
| Portfolio Turnover Rate |
116% |
|
|
| Holdings [Text Block] |
What did the Fund invest in? (as of June 30, 2026)
| Portfolio composition |
| Asset Type(a)(b) |
Percent of
Net Assets |
|
| Corporate Bonds |
55.8 |
% |
| Non-Agency Mortgage-Backed Securities |
27.2 |
% |
| U.S. Government Sponsored Agency Securities |
11.1 |
% |
| Common Stocks |
8.0 |
% |
| U.S. Treasury Obligations |
2.5 |
% |
| Asset-Backed Securities |
1.3 |
% |
| Capital Trusts |
1.2 |
% |
| Money Market Funds |
0.2 |
% |
| TBA Sale Commitments |
(0.2 |
)% |
| Liabilities in Excess of Other Assets |
(7.1 |
) |
| Industry allocation |
|
Percent of Total
Investments(c) |
| Industry |
Long |
|
Short |
|
Total |
|
| Financials |
12.6 |
% |
3.1 |
% |
15.7 |
% |
| Consumer Discretionary |
7.3 |
% |
4.3 |
% |
11.6 |
% |
| Industrials |
6.2 |
% |
2.5 |
% |
8.7 |
% |
| Health Care |
6.0 |
% |
1.9 |
% |
7.9 |
% |
| Information Technology |
4.7 |
% |
2.8 |
% |
7.5 |
% |
| Energy |
4.5 |
% |
2.4 |
% |
6.9 |
% |
| Consumer Staples |
3.8 |
% |
2.2 |
% |
6.0 |
% |
| Materials |
4.1 |
% |
1.6 |
% |
5.7 |
% |
| Communication Services |
3.7 |
% |
1.3 |
% |
5.0 |
% |
| Utilities |
3.3 |
% |
1.0 |
% |
4.3 |
% |
| Real Estate |
1.8 |
% |
0.6 |
% |
2.4 |
% |
| Other(d) |
18.3 |
% |
— |
% |
18.3 |
% |
|
76.3 |
|
23.7 |
|
100.0 |
|
| (a) |
Excludes underlying investments in equity swaps. |
| (b) |
Excludes short-term securities, short investments and options, if any. |
| (c) |
Include the gross market values of long and short securities of the underlying derivative contracts and excludes short-term securities and options, if any. |
| (d) |
Consist of Asset-Backed Securities (0.6%), Non-Agency Mortgaged-Backed Securities (12.6%) and U.S. Government Sponsored Agency Obligations (5.1%). |
|
|
| C000202321 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Systematic Multi-Strategy Fund
|
|
| Class Name |
Investor A Shares
|
|
| Trading Symbol |
BAMBX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Systematic Multi-Strategy Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-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.
|
|
| Additional Information Phone Number |
(800) 441‑7762
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months ? (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 |
$60 |
1.20%(a) |
|
|
| Expenses Paid, Amount |
$ 60
|
|
| Expense Ratio, Percent |
1.20%
|
[3] |
| Net Assets |
$ 7,997,975,058
|
|
| Holdings Count | Holding |
2,952
|
|
| Investment Company Portfolio Turnover |
116.00%
|
|
| Additional Fund Statistics [Text Block] |
| Key Fund statistics |
|
| Net Assets |
$7,997,975,058 |
| Number of Portfolio Holdings |
2,952 |
| Portfolio Turnover Rate |
116% |
|
|
| Holdings [Text Block] |
What did the Fund invest in? (as of June 30, 2026)
| Portfolio composition |
| Asset Type(a)(b) |
Percent of
Net Assets |
|
| Corporate Bonds |
55.8 |
% |
| Non-Agency Mortgage-Backed Securities |
27.2 |
% |
| U.S. Government Sponsored Agency Securities |
11.1 |
% |
| Common Stocks |
8.0 |
% |
| U.S. Treasury Obligations |
2.5 |
% |
| Asset-Backed Securities |
1.3 |
% |
| Capital Trusts |
1.2 |
% |
| Money Market Funds |
0.2 |
% |
| TBA Sale Commitments |
(0.2 |
)% |
| Liabilities in Excess of Other Assets |
(7.1 |
) |
| Industry allocation |
|
Percent of Total
Investments(c) |
| Industry |
Long |
|
Short |
|
Total |
|
| Financials |
12.6 |
% |
3.1 |
% |
15.7 |
% |
| Consumer Discretionary |
7.3 |
% |
4.3 |
% |
11.6 |
% |
| Industrials |
6.2 |
% |
2.5 |
% |
8.7 |
% |
| Health Care |
6.0 |
% |
1.9 |
% |
7.9 |
% |
| Information Technology |
4.7 |
% |
2.8 |
% |
7.5 |
% |
| Energy |
4.5 |
% |
2.4 |
% |
6.9 |
% |
| Consumer Staples |
3.8 |
% |
2.2 |
% |
6.0 |
% |
| Materials |
4.1 |
% |
1.6 |
% |
5.7 |
% |
| Communication Services |
3.7 |
% |
1.3 |
% |
5.0 |
% |
| Utilities |
3.3 |
% |
1.0 |
% |
4.3 |
% |
| Real Estate |
1.8 |
% |
0.6 |
% |
2.4 |
% |
| Other(d) |
18.3 |
% |
— |
% |
18.3 |
% |
|
76.3 |
|
23.7 |
|
100.0 |
|
| (a) |
Excludes underlying investments in equity swaps. |
| (b) |
Excludes short-term securities, short investments and options, if any. |
| (c) |
Include the gross market values of long and short securities of the underlying derivative contracts and excludes short-term securities and options, if any. |
| (d) |
Consist of Asset-Backed Securities (0.6%), Non-Agency Mortgaged-Backed Securities (12.6%) and U.S. Government Sponsored Agency Obligations (5.1%). |
|
|
| C000202323 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Systematic Multi-Strategy Fund
|
|
| Class Name |
Institutional Shares
|
|
| Trading Symbol |
BIMBX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Systematic Multi-Strategy Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-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.
|
|
| Additional Information Phone Number |
(800) 441‑7762
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months ? (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 |
$46 |
0.92%(a) |
|
|
| Expenses Paid, Amount |
$ 46
|
|
| Expense Ratio, Percent |
0.92%
|
[4] |
| Net Assets |
$ 7,997,975,058
|
|
| Holdings Count | Holding |
2,952
|
|
| Investment Company Portfolio Turnover |
116.00%
|
|
| Additional Fund Statistics [Text Block] |
| Key Fund statistics |
|
| Net Assets |
$7,997,975,058 |
| Number of Portfolio Holdings |
2,952 |
| Portfolio Turnover Rate |
116% |
|
|
| Holdings [Text Block] |
What did the Fund invest in? (as of June 30, 2026)
| Portfolio composition |
| Asset Type(a)(b) |
Percent of
Net Assets |
|
| Corporate Bonds |
55.8 |
% |
| Non-Agency Mortgage-Backed Securities |
27.2 |
% |
| U.S. Government Sponsored Agency Securities |
11.1 |
% |
| Common Stocks |
8.0 |
% |
| U.S. Treasury Obligations |
2.5 |
% |
| Asset-Backed Securities |
1.3 |
% |
| Capital Trusts |
1.2 |
% |
| Money Market Funds |
0.2 |
% |
| TBA Sale Commitments |
(0.2 |
)% |
| Liabilities in Excess of Other Assets |
(7.1 |
) |
| Industry allocation |
|
Percent of Total
Investments(c) |
| Industry |
Long |
|
Short |
|
Total |
|
| Financials |
12.6 |
% |
3.1 |
% |
15.7 |
% |
| Consumer Discretionary |
7.3 |
% |
4.3 |
% |
11.6 |
% |
| Industrials |
6.2 |
% |
2.5 |
% |
8.7 |
% |
| Health Care |
6.0 |
% |
1.9 |
% |
7.9 |
% |
| Information Technology |
4.7 |
% |
2.8 |
% |
7.5 |
% |
| Energy |
4.5 |
% |
2.4 |
% |
6.9 |
% |
| Consumer Staples |
3.8 |
% |
2.2 |
% |
6.0 |
% |
| Materials |
4.1 |
% |
1.6 |
% |
5.7 |
% |
| Communication Services |
3.7 |
% |
1.3 |
% |
5.0 |
% |
| Utilities |
3.3 |
% |
1.0 |
% |
4.3 |
% |
| Real Estate |
1.8 |
% |
0.6 |
% |
2.4 |
% |
| Other(d) |
18.3 |
% |
— |
% |
18.3 |
% |
|
76.3 |
|
23.7 |
|
100.0 |
|
| (a) |
Excludes underlying investments in equity swaps. |
| (b) |
Excludes short-term securities, short investments and options, if any. |
| (c) |
Include the gross market values of long and short securities of the underlying derivative contracts and excludes short-term securities and options, if any. |
| (d) |
Consist of Asset-Backed Securities (0.6%), Non-Agency Mortgaged-Backed Securities (12.6%) and U.S. Government Sponsored Agency Obligations (5.1%). |
|
|
|
|