# Portfolio overlap — MBB vs EUSB

Comparing **iShares MBS ETF** (2026-02-28) and **iShares ESG Advanced Universal USD Bond ETF** (2026-02-28).

- Shared positions: 376
- iShares MBS ETF covered by iShares ESG Advanced Universal USD Bond ETF: 0.1405877285472332490940302063
- iShares ESG Advanced Universal USD Bond ETF covered by iShares MBS ETF: 0.1405877285472332490940302060

## iShares MBS ETF — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| BlackRock Cash Funds: Treasury, SL Agency Shares | 0.056553 | ✓ |
| FR SD8146 | 0.010291 | ✓ |
| GNII II 5.5% 03/01/2056 #TBA | 0.009615 | ✓ |
| FNCL 5 3/24 | 0.005482 | ✓ |
| G2 MA7648 | 0.005326 | ✓ |
| G2 MA7766 | 0.005234 | ✓ |
| FN MA4492 | 0.005114 |  |
| G2SF 5 3/25 | 0.005052 | ✓ |
| FR SD8140 | 0.004922 | ✓ |
| FNCL 5.5 3/25 | 0.004759 | ✓ |
| G2 MA7472 | 0.004475 |  |
| Government National Mortgage Association, TBA | 0.004357 | ✓ |
| FN MA4465 | 0.004341 | ✓ |
| Uniform Mortgage-Backed Securities | 0.004292 |  |
| G2 MB0025 | 0.004054 | ✓ |
| G2 MA7935 | 0.003572 |  |
| G2 MA7367 | 0.003481 |  |
| Uniform Mortgage-Backed Security, TBA | 0.003370 | ✓ |
| FR SD8199 | 0.003358 |  |
| FN MA4281 | 0.003206 | ✓ |
| Fannie Mae Pool | 0.003203 |  |
| G2 MA9171 | 0.003146 | ✓ |
| FN MA4437 | 0.003071 | ✓ |
| G2 MA7826 | 0.003026 |  |
| G2 MA7534 | 0.002974 | ✓ |
| FN MA4305 | 0.002901 | ✓ |
| Fannie Mae Pool | 0.002783 |  |
| G2 MA7936 | 0.002780 |  |
| G2 MA7051 | 0.002745 |  |
| G2 MA7767 | 0.002705 | ✓ |
| G2 MA9965 | 0.002625 | ✓ |
| FR SD8324 | 0.002477 | ✓ |
| FNCL 6 3/24 | 0.002438 | ✓ |
| G2 MB0624 | 0.002424 | ✓ |
| FR SD8182 | 0.002333 | ✓ |
| FANNIE MAE POOL FN 05/52 FIXED VAR | 0.002240 |  |
| G2 MA9781 | 0.002239 |  |
| G2 MA7987 | 0.002232 |  |
| G2 MA7589 | 0.002201 |  |
| FR SD8134 | 0.002183 |  |
| FR SD8362 | 0.002174 |  |
| Uniform Mortgage-Backed Securities | 0.002110 |  |
| Uniform Mortgage-Backed Securities | 0.002096 |  |
| FR RA5205 | 0.002096 |  |
| FNCL UMBS 3.0 CA9308 02-01-51 | 0.002061 |  |
| G2 MA9852 | 0.002041 | ✓ |
| Uniform Mortgage-Backed Securities | 0.001978 |  |
| G2 MB0091 | 0.001940 |  |
| Freddie Mac Pool | 0.001921 |  |
| FR SD8234 | 0.001872 |  |

## iShares ESG Advanced Universal USD Bond ETF — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| BlackRock Cash Funds: Treasury, SL Agency Shares | 0.040236 | ✓ |
| US TREASURY N/B | 0.004125 |  |
| US TREASURY N/B | 0.003988 |  |
| US TREASURY N/B | 0.003968 |  |
| US TREASURY N/B | 0.003959 |  |
| US TREASURY N/B | 0.003941 |  |
| G2 MA7135 | 0.003923 | ✓ |
| US TREASURY N/B | 0.003882 |  |
| US TREASURY N/B | 0.003798 |  |
| US TREASURY N/B | 0.003790 |  |
| US TREASURY N/B | 0.003762 |  |
| US TREASURY N/B | 0.003739 |  |
| US TREASURY N/B | 0.003607 |  |
| US TREASURY N/B | 0.003500 |  |
| G2 MA7705 | 0.003331 | ✓ |
| US TREASURY N/B | 0.003306 |  |
| US TREASURY N/B | 0.003213 |  |
| US TREASURY N/B | 0.003168 |  |
| US TREASURY N/B | 0.003167 |  |
| US TREASURY N/B | 0.003119 |  |
| US TREASURY N/B | 0.003102 |  |
| US TREASURY N/B | 0.003067 |  |
| US TREASURY N/B | 0.002982 |  |
| G2SF 5 3/25 | 0.002831 | ✓ |
| US TREASURY N/B | 0.002789 |  |
| US TREASURY N/B | 0.002749 |  |
| US TREASURY N/B | 0.002742 |  |
| US TREASURY N/B | 0.002711 |  |
| US TREASURY N/B | 0.002668 |  |
| US TREASURY N/B | 0.002651 |  |
| US TREASURY N/B | 0.002630 |  |
| US TREASURY N/B | 0.002621 |  |
| US TREASURY N/B | 0.002602 |  |
| US TREASURY N/B | 0.002583 |  |
| US TREASURY N/B | 0.002574 |  |
| US TREASURY N/B | 0.002539 |  |
| US TREASURY N/B | 0.002536 |  |
| US TREASURY N/B | 0.002514 |  |
| US TREASURY N/B | 0.002476 |  |
| Uniform Mortgage-Backed Securities | 0.002454 | ✓ |
| US TREASURY N/B | 0.002443 |  |
| US TREASURY N/B | 0.002442 |  |
| US TREASURY N/B | 0.002379 |  |
| US TREASURY N/B | 0.002364 |  |
| US TREASURY N/B | 0.002345 |  |
| US TREASURY N/B | 0.002344 |  |
| US TREASURY N/B | 0.002331 |  |
| US TREASURY N/B | 0.002330 |  |
| US TREASURY N/B | 0.002317 |  |
| GNII II 5.5% 03/01/2056 #TBA | 0.002290 | ✓ |


## Sources

- N-PORT (fund A) — accession `0001410368-26-039527` (as of 2026-02-28)
  <https://www.sec.gov/Archives/edgar/data/1100663/000141036826039527/0001410368-26-039527-index.htm>
- N-PORT (fund B) — accession `0001410368-26-039522` (as of 2026-02-28)
  <https://www.sec.gov/Archives/edgar/data/1100663/000141036826039522/0001410368-26-039522-index.htm>

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