| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Conall McLean | Westlake Boys High School | 51.89q |
| 2 | Harrison Laing | Roncalli College | 52.53q |
| 3 | Isaac Saywell | St Bede's College | 53.09q |
| 4 | Taylor Hall | Tararua College | 54.26q |
| 5 | Oliver Mayers | Mt Albert Grammar | 56.15q |
| 6 | Felix Field | New Plymouth Boys High School | 56.21 |
| 7 | Zavier Toaolamai-Holden | Christchurch Boys High School | 56.81q |
| -- | Max Lewer | St Patrick's College (Silverst | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jaguun Gunregjav-Willers | St Patrick's College (Kilbirni | 53.87q |
| 2 | Aidan Platts | Botany Downs Secondary College | 54.11q |
| 3 | Oliver Toohey | Whanganui Collegiate | 55.87q |
| 4 | Samuel Paris | Auckland Grammar School | 57.83 |
| 5 | Bernard Stallard | St Patrick's College (Kilbirni | 58.06 |
| 6 | Solomon Hawes | Christchurch Boys High School | 58.92 |
| 7 | Joseph du Toit | Independent Home School Athlet | 1:05.04 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jack Marra | John Paul College | 52.42q |
| 2 | Brayden Neilson | New Plymouth Boys High School | 53.10q |
| 3 | Charles Howlett | Auckland Grammar School | 53.26q |
| 4 | Timothy Wallace | St Kentigern College | 53.38q |
| 5 | William Berkers | James Hargest College | 55.20q |
| 6 | Kieran Lawson | St Peter's School | 58.83 |
| 7 | Sam Gordon | Wellington College | 1:01.35 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Brayden Neilson | New Plymouth Boys High School | 52.23q |
| 2 | Harrison Laing | Roncalli College | 52.73q |
| 3 | Conall McLean | Westlake Boys High School | 53.33q |
| 4 | Charles Howlett | Auckland Grammar School | 53.94q |
| 5 | William Berkers | James Hargest College | 53.96 |
| 6 | Oliver Toohey | Whanganui Collegiate | 55.24 |
| 7 | Oliver Mayers | Mt Albert Grammar | 55.98 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Jack Marra | John Paul College | 53.09q |
| 2 | Jaguun Gunregjav-Willers | St Patrick's College (Kilbirni | 53.71q |
| 3 | Aidan Platts | Botany Downs Secondary College | 53.73q |
| 4 | Timothy Wallace | St Kentigern College | 53.91q |
| 5 | Taylor Hall | Tararua College | 55.01 |
| 6 | Zavier Toaolamai-Holden | Christchurch Boys High School | 58.15 |
| -- | Isaac Saywell | St Bede's College | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Jack Marra | John Paul College | 51.21 |
| 2 | Harrison Laing | Roncalli College | 51.56 |
| 3 | Conall McLean | Westlake Boys High School | 52.00 |
| 4 | Brayden Neilson | New Plymouth Boys High School | 52.09 |
| 5 | Aidan Platts | Botany Downs Secondary College | 53.11 |
| 6 | Charles Howlett | Auckland Grammar School | 53.23 |
| 7 | Jaguun Gunregjav-Willers | St Patrick's College (Kilbirni | 53.46 |
| 8 | Timothy Wallace | St Kentigern College | 54.59 |