Series and Classes/Contracts Information:
| Existing | |||
| Status | Name | Ticker Symbol | |
| CIK 0000773674 | |||
| Series S000005966 | GINNIE MAE FUND | ||
| Class/Contract C000016430 | INVESTOR CLASS | BGNMX | |
| Class/Contract C000016431 | A CLASS | BGNAX | |
| Class/Contract C000051002 | R5 CLASS | AGMNX | |
| Class/Contract C000051003 | R CLASS | AGMWX | |
| Class/Contract C000088034 | C CLASS | BGNCX | |
| Class/Contract C000189731 | I CLASS | AGMHX | |
| Status | Name | Ticker Symbol | |
| CIK 0000773674 | |||
| Series S000005968 | GOVERNMENT BOND FUND | ||
| Class/Contract C000016435 | INVESTOR CLASS | CPTNX | |
| Class/Contract C000016436 | A CLASS | ABTAX | |
| Class/Contract C000088035 | R5 CLASS | ABTIX | |
| Class/Contract C000088036 | C CLASS | ABTCX | |
| Class/Contract C000088037 | R CLASS | ABTRX | |
| Class/Contract C000189732 | I CLASS | ABHTX | |
| Status | Name | Ticker Symbol | |
| CIK 0000773674 | |||
| Series S000005970 | SHORT-TERM GOVERNMENT FUND | ||
| Class/Contract C000016440 | INVESTOR CLASS | TWUSX | |
| Class/Contract C000016441 | A CLASS | TWAVX | |
| Class/Contract C000088040 | R5 CLASS | TWUOX | |
| Class/Contract C000088041 | C CLASS | TWACX | |
| Class/Contract C000088042 | R CLASS | TWARX | |
| Class/Contract C000189733 | I CLASS | ASGHX | |
| Status | Name | Ticker Symbol | |
| CIK 0000908406 | |||
| Series S000006579 | DIVERSIFIED BOND FUND | ||
| Class/Contract C000017955 | INVESTOR CLASS | ADFIX | |
| Class/Contract C000017956 | A CLASS | ADFAX | |
| Class/Contract C000017957 | I CLASS | ACBPX | |
| Class/Contract C000017960 | C CLASS | CDBCX | |
| Class/Contract C000017961 | R CLASS | ADVRX | |
| Class/Contract C000131613 | R6 CLASS | ADDVX | |
| Class/Contract C000189684 | Y CLASS | ADVYX | |
| Class/Contract C000189686 | R5 CLASS | ADRVX | |
| Class/Contract C000237256 | G CLASS | ACDOX | |
| Status | Name | Ticker Symbol | |
| CIK 0000908406 | |||
| Series S000014384 | CORE PLUS FUND | ||
| Class/Contract C000039168 | INVESTOR CLASS | ACCNX | |
| Class/Contract C000039169 | R5 CLASS | ACCUX | |
| Class/Contract C000039170 | A CLASS | ACCQX | |
| Class/Contract C000039172 | C CLASS | ACCKX | |
| Class/Contract C000039173 | R CLASS | ACCPX | |
| Class/Contract C000189691 | I CLASS | ACCTX | |
| Class/Contract C000222299 | G CLASS | ACCYX | |
| Status | Name | Ticker Symbol | |
| CIK 0000908406 | |||
| Series S000014385 | SHORT DURATION FUND | ||
| Class/Contract C000039175 | C CLASS | ACSKX | |
| Class/Contract C000039176 | R CLASS | ACSPX | |
| Class/Contract C000039177 | INVESTOR CLASS | ACSNX | |
| Class/Contract C000039178 | R5 CLASS | ACSUX | |
| Class/Contract C000039179 | A CLASS | ACSQX | |
| Class/Contract C000189692 | I CLASS | ASHHX | |
| Class/Contract C000194393 | R6 CLASS | ASDDX | |
| Class/Contract C000224786 | G CLASS | ASDOX | |
| Status | Name | Ticker Symbol | |
| CIK 0000908406 | |||
| Series S000046093 | SHORT DURATION STRATEGIC INCOME FUND | ||
| Class/Contract C000144162 | INVESTOR CLASS | ASDVX | |
| Class/Contract C000144163 | R5 CLASS | ASDJX | |
| Class/Contract C000144164 | A CLASS | ASADX | |
| Class/Contract C000144165 | C CLASS | ASCDX | |
| Class/Contract C000144166 | R CLASS | ASDRX | |
| Class/Contract C000144167 | R6 CLASS | ASXDX | |
| Class/Contract C000189693 | I CLASS | ASDHX | |
| Class/Contract C000189694 | Y CLASS | ASYDX | |
| Status | Name | Ticker Symbol | |
| CIK 0000908406 | |||
| Series S000046094 | MULTISECTOR INCOME FUND | ||
| Class/Contract C000144168 | C CLASS | ASIHX | |
| Class/Contract C000144169 | R CLASS | ASIWX | |
| Class/Contract C000144170 | R6 CLASS | ASIPX | |
| Class/Contract C000144171 | INVESTOR CLASS | ASIEX | |
| Class/Contract C000144172 | R5 CLASS | ASIJX | |
| Class/Contract C000144173 | A CLASS | ASIQX | |
| Class/Contract C000189695 | I CLASS | ASIGX | |
| Class/Contract C000189696 | Y CLASS | ASYIX | |
| Status | Name | Ticker Symbol | |
| CIK 0001710607 | |||
| Series S000072410 | American Century Multisector Income ETF | ||
| Class/Contract C000228610 | American Century Multisector Income ETF | MUSI | |
| Status | Name | Ticker Symbol | |
| CIK 0001710607 | |||
| Series S000077487 | American Century Short Duration Strategic Income ETF | ||
| Class/Contract C000237948 | American Century Short Duration Strategic Income ETF | SDSI | |
| Status | Name | Ticker Symbol | |
| CIK 0001710607 | |||
| Series S000079797 | American Century Multisector Floating Income ETF | ||
| Class/Contract C000241171 | American Century Multisector Floating Income ETF | FUSI | |
EIN.: 000000000 | State of Incorp.: MA | Fiscal Year End: 0331
Type: 497 | Act: 33 | File No.: 002-99222 | Film No.: 231391700
EIN.: 000000000 | State of Incorp.: MA | Fiscal Year End: 0331
Type: 497 | Act: 33 | File No.: 033-65170 | Film No.: 231391698
EIN.: 000000000 | State of Incorp.: DE | Fiscal Year End: 0831
Type: 497 | Act: 33 | File No.: 333-221045 | Film No.: 231391699