Series and Classes/Contracts Information:
| Existing | |||
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000004357 | iShares Lehman 1-3 Year Treasury Bond Fund | ||
| Class/Contract C000012087 | iShares Lehman 1-3 Year Treasury Bond Fund | SHY | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000004358 | iShares Lehman 7-10 Year Treasury Bond Fund | ||
| Class/Contract C000012088 | iShares Lehman 7-10 Year Treasury Bond Fund | IEF | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000004360 | iShares Lehman 20+ Year Treasury Bond Fund | ||
| Class/Contract C000012090 | iShares Lehman 20+ Year Treasury Bond Fund | TLT | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000004361 | iShares iBoxx $ Investment Grade Corporate Bond Fund | ||
| Class/Contract C000012091 | iShares iBoxx $ Investment Grade Corporate Bond Fund | LQD | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000004362 | iShares Lehman Aggregate Bond Fund | ||
| Class/Contract C000012092 | iShares Lehman Aggregate Bond Fund | AGG | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000004363 | iShares Lehman TIPS Bond Fund | ||
| Class/Contract C000012093 | iShares Lehman TIPS Bond Fund | TIP | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013694 | iShares Lehman Short Treasury Bond Fund | ||
| Class/Contract C000037536 | iShares Lehman Short Treasury Bond Fund | SHV | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013695 | iShares Lehman 3-7 Year Treasury Bond Fund | ||
| Class/Contract C000037537 | iShares Lehman 3-7 Year Treasury Bond Fund | IEI | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013696 | iShares Lehman 10-20 Year Treasury Bond Fund | ||
| Class/Contract C000037538 | iShares Lehman 10-20 Year Treasury Bond Fund | TLH | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013697 | iShares Lehman 1-3 Year Credit Bond Fund | ||
| Class/Contract C000037539 | iShares Lehman 1-3 Year Credit Bond Fund | CSJ | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013698 | iShares Lehman Intermediate Credit Bond Fund | ||
| Class/Contract C000037540 | iShares Lehman Intermediate Credit Bond Fund | CIU | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013699 | iShares Lehman Credit Bond Fund | ||
| Class/Contract C000037541 | iShares Lehman Credit Bond Fund | CFT | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013700 | iShares Lehman Intermediate Government/Credit Bond Fund | ||
| Class/Contract C000037542 | iShares Lehman Intermediate Government/Credit Bond Fund | GVI | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013701 | iShares Lehman Government/Credit Bond Fund | ||
| Class/Contract C000037543 | iShares Lehman Government/Credit Bond Fund | GBF | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000013702 | iShares Lehman MBS Fixed-Rate Bond Fund | ||
| Class/Contract C000037544 | iShares Lehman MBS Fixed-Rate Bond Fund | MBB | |
| Status | Name | Ticker Symbol | |
| CIK 0001100663 | |||
| Series S000016772 | iShares iBoxx $ High Yield Corporate Bond Fund | ||
| Class/Contract C000046846 | iShares iBoxx $ High Yield Corporate Bond Fund | ||
IRS No.: 943351276 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 497 | Act: 33 | File No.: 333-92935 | Film No.: 071146898