IUSB vs AGG overlap
IUSB and AGG overlap 66.3% by weight, across 11,318 shared holdings.
Pick 2 to 4 ETFs.
These funds report on different dates (IUSB: July 31, 2026, AGG: May 31, 2026), so market moves and index changes between those dates lower the number. Funds tracking the same index can read well below their true overlap.
Top shared holdings
| Holding | IUSB | AGG | Overlap |
|---|---|---|---|
| US Treasury N/B | 0.36% | 0.39% | 0.36% |
| US Treasury N/B | 0.35% | 0.42% | 0.35% |
| US Treasury N/BT | 0.34% | 0.39% | 0.34% |
| US Treasury N/B | 0.34% | 0.38% | 0.34% |
| US Treasury N/B | 0.34% | 0.41% | 0.34% |
| US Treasury N/BT | 0.33% | 0.39% | 0.33% |
| US Treasury N/BT | 0.33% | 0.37% | 0.33% |
| US Treasury N/B | 0.33% | 0.40% | 0.33% |
| US Treasury N/B | 0.32% | 0.39% | 0.32% |
| US Treasury N/B | 0.31% | 0.41% | 0.31% |
| US Treasury N/B | 0.30% | 0.35% | 0.30% |
| US Treasury N/B | 0.29% | 0.40% | 0.29% |
| US Treasury N/BT | 0.28% | 0.29% | 0.28% |
| US Treasury N/B | 0.29% | 0.28% | 0.28% |
| US Treasury N/BT | 0.28% | 0.30% | 0.28% |
Overlap by weight adds up the smaller weight of each holding the funds share, so 100% means identical portfolios. Long securities only: derivatives and cash vehicles are left out. Sources: IUSB, SEC Form N-PORT, July 31, 2026; AGG, SEC Form N-PORT, May 31, 2026.
Largest institutions holding both
| Firm | IUSB | AGG |
|---|---|---|
| Jones Financial Companies LLLP | $4.1B | $10.9B |
| Envestnet Asset Management Inc. | $8.3B | $4.3B |
| BlackRock, Inc. | $3.8B | $6.1B |
| Raymond James Financial Inc. | $247.2M | $9.2B |
| Wells Fargo & Company | $2.3B | $6.4B |
| Bank of America Corp. | $211.6M | $6.6B |
| Morgan Stanley | $1.4B | $3.5B |
| Mercer Global Advisors Inc. | $19.3M | $4.5B |
| LPL Financial LLC | $2.9B | $1.5B |
| US Bancorp | $3.2M | $3.9B |
| Northwestern Mutual Wealth Management Co | $1.5B | $1.3B |
| JPMorgan Chase & Co | $1.0B | $1.6B |
| Mariner, LLC | $957.3M | $1.5B |
| Northern Trust Corp. | $759K | $2.3B |
| Cetera Investment Advisers | $615.5M | $1.5B |
This compares who owns the funds, not what the funds hold. From SEC Form 13F, for managers with $100M+ in US securities.
Who owns them: IUSB institutional holders, AGG institutional holders.
Frequently asked questions
How much do IUSB and AGG overlap?
66.3% by weight, with 11,318 holdings in common, using holdings for IUSB as of July 31, 2026 and AGG as of May 31, 2026. The largest shared position is US TREASURY N/B.
Do institutions hold both IUSB and AGG?
623 Form 13F filers report positions in both, out of 2,323 that report either one.
How is overlap by weight worked out?
For each holding the two funds share, take the smaller of the two weights, then add those up. Identical portfolios score 100%.