iShares U.S. Securitized Bond Index Fund (BISBX) is an MF managed by BlackRock / iShares. Its largest position is BLACKROCK CASH FUNDS TREASURY SL AGENCY SHARES (null), representing 8.22% of fund assets.
iShares U.S. Securitized Bond Index Fund Portfolio Holdings
Source: SEC Form N-PORT institutional portfolio disclosures
- Ticker:
- BISBX
- Type:
- MF
- Manager:
- BlackRock / iShares
- Total Assets:
- —
- Report Date:
- Apr 30, 2026
- Filing Date:
- Jun 25, 2026
| Holding | Weight | Market Value | Shares |
|---|---|---|---|
|
-
BLACKROCK CASH FUNDS TREASURY SL AGENCY SHARES
|
8.22% | $460,890,713.81 | 460,752,488 |
|
-
FEDERAL NATIONAL MORTGAGE ASSOCIATION
|
1.09% | $60,953,062.33 | 75,644,490 |
|
-
FNMA
|
0.88% | $49,541,154.72 | 58,716,020 |
|
-
FANNIE MAE
|
0.85% | $47,868,981.97 | 59,432,522 |
|
-
FEDERAL NATIONAL MORTGAGE ASSOCIATION
|
0.82% | $45,952,430.25 | 56,855,631 |
|
-
GOVERNMENT NATIONAL MORTGAGE A
|
0.65% | $36,394,047.47 | 42,470,608 |
|
-
UNIFORM MORTGAGE-BACKED SECURITIES
|
0.63% | $35,321,416.26 | 38,525,000 |
|
-
UNIFORM MORTGAGE-BACKED SECURITIES
|
0.57% | $32,059,552.93 | 35,225,000 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.53% | $29,807,785.21 | 36,173,692 |
|
-
G2SF 30 YR TBA 5% MAY 26
|
0.50% | $28,324,714.72 | 28,575,000 |
|
-
UMBS, TBA
|
0.50% | $27,940,454.71 | 29,050,000 |
|
-
GNMA
|
0.49% | $27,455,688.73 | 27,056,689 |
|
-
FANNIE MAE
|
0.49% | $27,317,020.01 | 34,045,247 |
|
-
FREDDIE MAC
|
0.48% | $26,931,475.48 | 33,428,361 |
|
-
UMBS, TBA
|
0.47% | $26,343,615.97 | 28,094,000 |
|
-
FANNIE MAE
|
0.47% | $26,124,412.23 | 27,000,508 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.46% | $25,792,484.93 | 25,612,500 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.46% | $25,657,714.11 | 29,941,674 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.45% | $25,427,619.65 | 25,586,587 |
|
-
FEDERAL HOME LOAN MORTGAGE CORP
|
0.44% | $24,425,655.27 | 30,173,650 |
|
-
FREDDIE MAC
|
0.43% | $24,255,169.63 | 24,432,689 |
|
-
UMBS P#SD8194 2.5% 02/01/52
|
0.43% | $24,000,611.45 | 28,455,904 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.42% | $23,809,527.56 | 23,959,707 |
|
-
FNMA
|
0.41% | $23,222,875.67 | 25,338,911 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.41% | $22,940,577.52 | 27,839,888 |
|
-
FANNIE MAE
|
0.40% | $22,331,627.22 | 27,738,222 |
|
-
GNMA
|
0.39% | $22,084,082.64 | 25,771,369 |
|
-
FANNIE MAE
|
0.39% | $21,922,098.31 | 26,015,491 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.39% | $21,902,359.48 | 26,579,942 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.38% | $21,475,605.47 | 23,020,000 |
|
-
FEDERAL NATIONAL MORTGAGE ASSOCIATION
|
0.38% | $21,244,025.20 | 25,210,805 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.37% | $20,651,740.44 | 24,099,874 |
|
-
FHLMC POOL
|
0.37% | $20,635,720.42 | 25,598,428 |
|
-
FNMA OR FHLMC
|
0.37% | $20,582,233.44 | 21,875,000 |
|
-
FEDERAL HOME LOAN MORTGAGE CORP
|
0.35% | $19,691,599.21 | 24,463,007 |
|
-
FREDDIE MAC
|
0.35% | $19,678,440.74 | 23,271,525 |
|
-
FNMA
|
0.35% | $19,565,454.21 | 23,104,029 |
|
-
FANNIE MAE
|
0.34% | $19,120,459.45 | 22,340,975 |
|
-
UMBS, TBA
|
0.34% | $19,044,651.68 | 18,656,000 |
|
-
FREDDIE MAC
|
0.34% | $19,039,683.20 | 21,483,400 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.33% | $18,661,174.11 | 18,305,000 |
|
-
FANNIE MAE
|
0.33% | $18,650,632.45 | 21,807,803 |
|
-
FNMA
|
0.33% | $18,567,169.01 | 21,997,668 |
|
-
GNMA
|
0.33% | $18,325,091.20 | 18,138,130 |
|
-
FHLMC POOL
|
0.32% | $17,971,007.97 | 22,244,710 |
|
-
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION
|
0.32% | $17,896,785.75 | 20,884,596 |
|
-
FANNIE MAE
|
0.30% | $17,059,256.20 | 19,416,836 |
|
-
FEDERAL NATIONAL MORTGAGE ASSOCIATION FANNIE MAE
|
0.30% | $17,034,315.23 | 16,950,000 |
|
-
FNMA
|
0.30% | $16,693,977.68 | 18,260,029 |
|
-
FNMA
|
0.30% | $16,655,644.63 | 16,329,542 |
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