Series and Classes/Contracts Information:
| Existing | |||
| Status | Name | Ticker Symbol | |
| CIK 0000200489 | |||
| Series S000002438 | MFS Research Fund | ||
| Class/Contract C000006533 | A | MFRFX | |
| Class/Contract C000006534 | R4 | MFRJX | |
| Class/Contract C000006538 | B | MFRBX | |
| Class/Contract C000006539 | C | MFRCX | |
| Class/Contract C000006540 | I | MRFIX | |
| Class/Contract C000006542 | R1 | MFRLX | |
| Class/Contract C000006544 | R2 | MSRRX | |
| Class/Contract C000006545 | R3 | MFRHX | |
| Class/Contract C000034431 | R6 | MFRKX | |
IRS No.: 042468583 | State of Incorp.: MA | Fiscal Year End: 0930
Type: NPORT-P | Act: 40 | File No.: 811-02031 | Film No.: 23662627
