Medallion Shield Performance by School Performance Table

| School | Titles | Shared_Titles | Runners_Up | Total_Finals | Last_Title | Last_Final |
|---|---|---|---|---|---|---|
| Ballyclare High School | 1 | 0 | 0 | 1 | 1990 | 1990 |
| Annadale Grammar School ‡ | 0 | 3 | 1 | 4 | 1967 † | 1967 |
| Wallace High School | 0 | 1 | 3 | 4 | 2010 † | 2013 |
| Belfast Boys` Model School | 0 | 0 | 1 | 1 | N/A | 1964 |
| Belfast High School | 0 | 0 | 1 | 1 | N/A | 1980 |
| Foyle College | 0 | 0 | 1 | 1 | N/A | 1939 |
| Larne Grammar School | 0 | 0 | 1 | 1 | N/A | 1955 |