1 institutions reported holding $6,624 of MFS RESEARCH FUND-CL A (MFRFX) in SEC 13F filings for 2026-03-31. Largest institutional holders: McMillan Office, Inc. ($6,624). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | McMillan Office, Inc. | $6,624 | 124 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31