# Portfolio overlap — IUSB vs LUTAX Comparing **iShares Core Universal USD Bond ETF** (2026-01-31) and **Columbia U.S. Treasury Index Fund** (2026-01-31). - Shared positions: 276 - iShares Core Universal USD Bond ETF covered by Columbia U.S. Treasury Index Fund: 0.3722424234169800829341748533 - Columbia U.S. Treasury Index Fund covered by iShares Core Universal USD Bond ETF: 0.3722424234169800829341748534 ## iShares Core Universal USD Bond ETF — top positions | Security | Weight | Shared | |----------|--------|--------| | Blackrock Liquidity TempCash Inst | 0.023010 | | | BlackRock Cash Funds: Treasury, SL Agency Shares | 0.007770 | | | US TREASURY N/B | 0.003831 | ✓ | | US TREASURY N/B | 0.003785 | ✓ | | US TREASURY N/B | 0.003777 | ✓ | | US TREASURY N/B | 0.003775 | ✓ | | US TREASURY N/B | 0.003711 | ✓ | | US TREASURY N/B | 0.003708 | ✓ | | US TREASURY N/B | 0.003548 | ✓ | | US TREASURY N/B | 0.003495 | ✓ | | US TREASURY N/B | 0.003432 | ✓ | | US TREASURY N/B | 0.003366 | ✓ | | FN MA4018 | 0.003335 | | | US TREASURY N/B | 0.003275 | ✓ | | US TREASURY N/B | 0.003210 | ✓ | | US TREASURY N/B | 0.003197 | ✓ | | US TREASURY N/B | 0.003052 | ✓ | | US TREASURY N/B | 0.002966 | ✓ | | US TREASURY N/B | 0.002932 | ✓ | | US TREASURY N/B | 0.002756 | ✓ | | US TREASURY N/B | 0.002756 | ✓ | | US TREASURY N/B | 0.002717 | ✓ | | US TREASURY N/B | 0.002668 | ✓ | | US TREASURY N/B | 0.002655 | ✓ | | US TREASURY N/B | 0.002640 | ✓ | | US TREASURY N/B | 0.002620 | ✓ | | US TREASURY N/B | 0.002614 | ✓ | | US TREASURY N/B | 0.002590 | ✓ | | US TREASURY N/B | 0.002588 | ✓ | | US TREASURY N/B | 0.002547 | ✓ | | US TREASURY N/B | 0.002547 | ✓ | | US TREASURY N/B | 0.002473 | ✓ | | US TREASURY N/B | 0.002452 | ✓ | | US TREASURY N/B | 0.002428 | ✓ | | US TREASURY N/B | 0.002422 | ✓ | | US TREASURY N/B | 0.002419 | ✓ | | US TREASURY N/B | 0.002404 | ✓ | | US TREASURY N/B | 0.002394 | ✓ | | US TREASURY N/B | 0.002390 | ✓ | | US TREASURY N/B | 0.002343 | | | US TREASURY N/B | 0.002333 | ✓ | | US TREASURY N/B | 0.002294 | ✓ | | US TREASURY N/B | 0.002260 | ✓ | | US TREASURY N/B | 0.002248 | ✓ | | US TREASURY N/B | 0.002241 | ✓ | | US TREASURY N/B | 0.002226 | ✓ | | US TREASURY N/B | 0.002211 | ✓ | | G2 MA7192 | 0.002184 | | | US TREASURY N/B | 0.002144 | ✓ | | US TREASURY N/B | 0.002127 | ✓ | ## 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 | ✓ | ## Sources - N-PORT (fund A) — accession `0002071691-26-007327` (as of 2026-01-31) - N-PORT (fund B) — accession `0001410368-26-033335` (as of 2026-01-31) --- _Informational only — not investment advice. FundWatcher presents publicly available data and makes no recommendation to buy or sell any security. Verify all figures against the source filing before relying on them._ _Data sourced from U.S. SEC EDGAR filings (Forms N-PORT, N-CEN, and prospectus Risk/Return summaries). FundWatcher is not affiliated with the SEC._ _Use of this data is subject to the FundWatcher Terms of Service. Information may be used only for personal, non-commercial research and may not be redistributed. See _