| FlexShares Credit-Scored US Corp Bd ETF
| - | 24.24% | - | - | 750,621 |
| iShares 3-7 Year Treasury Bond ETF
| - | 14.79% | - | - | 188,402 |
| FlexShares Ultra-Short Income ETF
| - | 14.03% | - | - | 283,582 |
| FlexShares Disciplined Duration MBS ETF
| - | 12.49% | - | - | 912,154 |
| iShares 20+ Year Treasury Bond ETF
| - | 12.17% | - | - | 208,193 |
| iShares MBS ETF
| - | 10.22% | - | - | 162,251 |
| iShares 5-10 Year invmt Grd Corp Bd ETF
| - | 6.02% | - | - | 169,563 |
| FlexShares iBoxx 3Yr Target Dur TIPS ETF
| - | 2.03% | - | - | 128,053 |
| FlexShares Crdt-Scrd US Lng Corp Bd ETF
| - | 1.94% | - | - | 69,120 |
| iShares 1-5 Year invmt Grd Corp Bd ETF
| - | 0.50% | - | - | 14,346 |