| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Max Wildbore | Napier Boys High School | 4:04.92q |
| 2 | Etienne Calonne | Westlake Boys High School | 4:05.05q |
| 3 | James McLeay | Southland Boys High School | 4:05.14q |
| 4 | Cooper Wightman | Christchurch Boys High School | 4:05.52q |
| 5 | Callum Murray | Aquinas College | 4:06.56q |
| 6 | Joe Martin | Wellington College | 4:08.59 |
| 7 | Thomas Allan | Timaru Boys' High School | 4:12.97 |
| 8 | Felix Field | New Plymouth Boys High School | 4:13.74 |
| 9 | Alexander Wilkins | Auckland Grammar School | 4:15.02 |
| 10 | Jack Erikson | Kings College | 4:18.53 |
| 11 | Zack Conroy | Hauraki Plains College | 4:26.82 |
| -- | Samuel Leitch | St Bede's College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jamie Mora | Auckland Grammar School | 4:17.98q |
| 2 | Hamish Murray | Aquinas College | 4:18.17q |
| 3 | Angus Sevier | Cashmere High School | 4:18.35q |
| 4 | Daniel Hayes | St Kentigern College | 4:18.46q |
| 5 | Azrael Cabusao | Tauranga Boys' College | 4:18.82q |
| 6 | Jake Owen | Otago Boys High School | 4:19.21 |
| 7 | Harrison Wills | Wellington College | 4:29.81 |
| 8 | Wilson Li | St Patrick's College (Kilbirni | 4:31.10 |
| 9 | James Ellwood | Wellington College | 4:33.78 |
| 10 | Ruie Hyslop | Otago Boys High School | 4:35.12 |
| -- | Connor Boulton | Macleans College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Nick Dobbie | New Plymouth Boys High School | 4:07.17q |
| 2 | Daniel Prescott | St Thomas Of Canterbury Colleg | 4:08.38q |
| 3 | Daniel Sinclair | Whanganui Collegiate | 4:08.63q |
| 4 | George Wyllie | Tauranga Boys' College | 4:11.67q |
| 5 | Elliott Pugh | Bethlehem College | 4:11.68q |
| 6 | Zavier Brown | New Plymouth Boys High School | 4:12.54 |
| 7 | Jack Snedden | St Peter's College (Auckland) | 4:15.58 |
| 8 | Bede Colbourne | Francis Douglas Memorial Colle | 4:18.25 |
| 9 | Sam McHale | Napier Boys High School | 4:23.30 |
| 10 | Matthew Sinclair | Whanganui Collegiate | 4:36.42 |
| 11 | Oscar Monro | Glendowie College | 4:43.15 |
| -- | Josh Gordon-Glassford | St Kentigern College | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Daniel Prescott | St Thomas Of Canterbury Colleg | 3:54.64 |
| 2 | Jamie Mora | Auckland Grammar School | 3:55.65 |
| 3 | Etienne Calonne | Westlake Boys High School | 3:56.15 |
| 4 | Cooper Wightman | Christchurch Boys High School | 3:56.19 |
| 5 | Angus Sevier | Cashmere High School | 3:56.59 |
| 6 | Daniel Sinclair | Whanganui Collegiate | 3:58.01 |
| 7 | Elliott Pugh | Bethlehem College | 3:58.51 |
| 8 | George Wyllie | Tauranga Boys' College | 3:59.78 |
| 9 | James McLeay | Southland Boys High School | 4:01.26 |
| 10 | Daniel Hayes | St Kentigern College | 4:01.63 |
| 11 | Nick Dobbie | New Plymouth Boys High School | 4:01.81 |
| 12 | Hamish Murray | Aquinas College | 4:05.19 |
| 13 | Callum Murray | Aquinas College | 4:10.54 |
| 14 | Max Wildbore | Napier Boys High School | 4:13.69 |
| 15 | Azrael Cabusao | Tauranga Boys' College | 4:32.06 |