# Portfolio overlap — IUTIX vs VBTLX

Comparing **Columbia U.S. Treasury Index Fund** (2026-01-31) and **VANGUARD TOTAL BOND MARKET INDEX FUND** (2026-03-31).

- Shared positions: 274
- Columbia U.S. Treasury Index Fund covered by VANGUARD TOTAL BOND MARKET INDEX FUND: 0.4551970395956116508903013025
- VANGUARD TOTAL BOND MARKET INDEX FUND covered by Columbia U.S. Treasury Index Fund: 0.4551970395956116508903013025

## Columbia U.S. Treasury Index Fund — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| US TREASURY N/B | 0.009020 | ✓ |
| US TREASURY N/B | 0.008851 | ✓ |
| US TREASURY N/B | 0.008754 | ✓ |
| US TREASURY N/B | 0.008742 | ✓ |
| US TREASURY N/B | 0.008599 | ✓ |
| US TREASURY N/B | 0.008530 | ✓ |
| US TREASURY N/B | 0.008526 | ✓ |
| US TREASURY N/B | 0.008426 | ✓ |
| US TREASURY N/B | 0.007907 | ✓ |
| US TREASURY N/B | 0.007666 | ✓ |
| US TREASURY N/B | 0.007246 | ✓ |
| US TREASURY N/B | 0.007039 | ✓ |
| US TREASURY N/B | 0.007032 | ✓ |
| US TREASURY N/B | 0.007031 | ✓ |
| US TREASURY N/B | 0.007027 | ✓ |
| US TREASURY N/B | 0.006976 | ✓ |
| US TREASURY N/B | 0.006954 | ✓ |
| US TREASURY N/B | 0.006949 | ✓ |
| US TREASURY N/B | 0.006884 | ✓ |
| US TREASURY N/B | 0.006625 | ✓ |
| US TREASURY N/B | 0.006609 | ✓ |
| US TREASURY N/B | 0.006520 | ✓ |
| US TREASURY N/B | 0.006445 | ✓ |
| US TREASURY N/B | 0.005704 | ✓ |
| US TREASURY N/B | 0.005431 | ✓ |
| US TREASURY N/B | 0.005426 | ✓ |
| US TREASURY N/B | 0.005338 |  |
| US TREASURY N/B | 0.005302 | ✓ |
| US TREASURY N/B | 0.005281 |  |
| US TREASURY N/B | 0.005159 | ✓ |
| US TREASURY N/B | 0.005133 | ✓ |
| US TREASURY N/B | 0.005131 | ✓ |
| US TREASURY N/B | 0.005119 | ✓ |
| US TREASURY N/B | 0.005119 | ✓ |
| US TREASURY N/B | 0.005108 | ✓ |
| US TREASURY N/B | 0.005084 | ✓ |
| US TREASURY N/B | 0.005080 | ✓ |
| US TREASURY N/B | 0.005058 | ✓ |
| US TREASURY N/B | 0.005057 | ✓ |
| US TREASURY N/B | 0.005052 | ✓ |
| US TREASURY N/B | 0.005035 | ✓ |
| US TREASURY N/B | 0.005035 | ✓ |
| US TREASURY N/B | 0.005028 | ✓ |
| US TREASURY N/B | 0.005000 |  |
| US TREASURY N/B | 0.004996 | ✓ |
| US TREASURY N/B | 0.004982 | ✓ |
| US TREASURY N/B | 0.004978 | ✓ |
| US TREASURY N/B | 0.004951 | ✓ |
| US TREASURY N/B | 0.004949 | ✓ |
| US TREASURY N/B | 0.004947 | ✓ |

## VANGUARD TOTAL BOND MARKET INDEX FUND — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| Vanguard Market Liquidity Fund | 0.010685 |  |
| US TREASURY N/B | 0.004799 | ✓ |
| US TREASURY N/B | 0.004211 | ✓ |
| US TREASURY N/B | 0.004208 | ✓ |
| US TREASURY N/B | 0.004193 | ✓ |
| US TREASURY N/B | 0.004153 | ✓ |
| US TREASURY N/B | 0.004130 | ✓ |
| US TREASURY N/B | 0.004051 | ✓ |
| US TREASURY N/B | 0.003950 | ✓ |
| US TREASURY N/B | 0.003933 | ✓ |
| US TREASURY N/B | 0.003650 | ✓ |
| US TREASURY N/B | 0.003636 | ✓ |
| US TREASURY N/B | 0.003633 | ✓ |
| US TREASURY N/B | 0.003529 | ✓ |
| US TREASURY N/B | 0.003528 | ✓ |
| US TREASURY N/B | 0.003509 | ✓ |
| US TREASURY N/B | 0.003423 | ✓ |
| US TREASURY N/B | 0.003304 | ✓ |
| US TREASURY N/B | 0.003245 | ✓ |
| US TREASURY N/B | 0.003239 | ✓ |
| US TREASURY N/B | 0.003235 | ✓ |
| US TREASURY N/B | 0.003207 | ✓ |
| US TREASURY N/B | 0.003188 | ✓ |
| US TREASURY N/B | 0.003167 | ✓ |
| US TREASURY N/B | 0.003117 | ✓ |
| US TREASURY N/B | 0.003086 | ✓ |
| US TREASURY N/B | 0.002885 | ✓ |
| US TREASURY N/B | 0.002751 | ✓ |
| US TREASURY N/B | 0.002746 | ✓ |
| US TREASURY N/B | 0.002725 | ✓ |
| US TREASURY N/B | 0.002602 | ✓ |
| US TREASURY N/B | 0.002428 | ✓ |
| US TREASURY N/B | 0.002421 | ✓ |
| US TREASURY N/B | 0.002415 | ✓ |
| US TREASURY N/B | 0.002412 | ✓ |
| US TREASURY N/B | 0.002401 | ✓ |
| US TREASURY N/B | 0.002394 | ✓ |
| US TREASURY N/B | 0.002392 | ✓ |
| US TREASURY N/B | 0.002360 | ✓ |
| US TREASURY N/B | 0.002358 | ✓ |
| US TREASURY N/B | 0.002330 | ✓ |
| US TREASURY N/B | 0.002312 | ✓ |
| US TREASURY N/B | 0.002295 | ✓ |
| US TREASURY N/B | 0.002286 | ✓ |
| US TREASURY N/B | 0.002284 | ✓ |
| US TREASURY N/B | 0.002276 | ✓ |
| US TREASURY N/B | 0.002272 | ✓ |
| US TREASURY N/B | 0.002256 | ✓ |
| US TREASURY N/B | 0.002244 |  |
| US TREASURY N/B | 0.002240 | ✓ |


## Sources

- N-PORT (fund A) — accession `0001410368-26-033335` (as of 2026-01-31)
  <https://www.sec.gov/Archives/edgar/data/773757/000141036826033335/0001410368-26-033335-index.htm>
- N-PORT (fund B) — accession `0000794105-26-000185` (as of 2026-03-31)
  <https://www.sec.gov/Archives/edgar/data/794105/000079410526000185/0000794105-26-000185-index.htm>

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