5 institutions reported holding $225,170 of DIPLOMA PLC (DPMAY) in SEC 13F filings for 2026-06-30. Largest institutional holders: RHUMBLINE ADVISERS ($173,927), GAMMA Investing LLC ($45,797), Ancora Advisors LLC ($2,794), First Command Advisory Services, Inc. ($2,652), NBC SECURITIES, INC. ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | RHUMBLINE ADVISERS | $173,927 | 7,345 | Hold |
| 2 | GAMMA Investing LLC | $45,797 | 1,934 | Added |
| 3 | Ancora Advisors LLC | $2,794 | 118 | Hold |
| 4 | First Command Advisory Services, Inc. | $2,652 | 112 | New |
| 5 | NBC SECURITIES, INC. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30