1 institutions reported holding $15,197 of MFS RESEARCH FUND CLASS I (MRFIX) in SEC 13F filings for 2026-03-31. Largest institutional holders: McIlrath & Eck, LLC ($15,197). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | McIlrath & Eck, LLC | $15,197 | 272 | New |
Source: SEC Form 13F filings · as of 2026-03-31