| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Angus Monro | Glendowie College | 4:02.78q |
| 2 | Etienne Calonne | Westlake Boys High School | 4:02.82q |
| 3 | Elliot Pugh | Bethlehem College | 4:03.13q |
| 4 | William Johnston | St Peter's College (Auckland) | 4:03.38q |
| 5 | Callum O'Keeffe | Lindisfarne College | 4:04.70q |
| 6 | Tayne Patel | Havelock North High School | 4:05.18 |
| 7 | Luke Cudby | Westlake Boys High School | 4:05.21 |
| 8 | Zach O'Dwyer | Sacred Heart College (Auckland | 4:06.76 |
| 9 | George Hamilton | Otago Boys High School | 4:07.11 |
| 10 | Daniel Prescott | St Thomas Of Canterbury Colleg | 4:08.86 |
| 11 | George Mawson | Kelston Boys High School | 4:09.69 |
| 12 | Samuel Stichbury | Palmerston North Boys High Sch | 4:10.52 |
| 13 | Oliver Gaplin | St Peter's School | 4:15.46 |
| 14 | Jackson Bigwood | New Plymouth Boys High School | 4:19.07 |
| 15 | Benjamin Scott | James Hargest College | 4:23.52 |
| 16 | Logan Marshall | Macleans College | 4:28.24 |
| 17 | Flynn Register | Rathkeale College/Trinity Seni | 4:28.71 |
| 18 | Zack Conroy | Hauraki Plains College | 4:34.35 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Karsen Vesty | Havelock North High School | 4:00.85q |
| 2 | Tomas Barry | St Peter's College (Auckland) | 4:01.02q |
| 3 | Ronan Codyre | Macleans College | 4:01.14q |
| 4 | Cameron Maunder | Westlake Boys High School | 4:01.36q |
| 5 | Angus Sevier | Cashmere High School | 4:01.74q |
| 6 | James McLeay | Southland Boys High School | 4:01.87q |
| 7 | Pai Wynyard | Kaiapoi High School | 4:02.60q |
| 8 | Ben Brunner | Wellington College | 4:02.73q |
| 9 | Callum Murray | Aquinas College | 4:03.11q |
| 10 | Liam O'Donnell | St Thomas Of Canterbury Colleg | 4:03.45 |
| 11 | Oscar Monro | Glendowie College | 4:14.93 |
| 12 | Wilson Li | St Patrick's College (Kilbirni | 4:16.41 |
| 13 | Harrison Loretz | Westlake Boys High School | 4:20.81 |
| 14 | Nick Dobbie | New Plymouth Boys High School | 4:24.58 |
| 15 | Fenlon Bayley | Nelson College | 4:25.28 |
| 16 | Phonse Carroll | Christchurch Boys High School | 4:27.91 |
| 17 | Oliver Heffernan | St Patrick's College (Silverst | 5:04.30 |
| -- | Jamie Mora | Auckland Grammar School | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Karsen Vesty | Havelock North High School | 3:51.33 |
| 2 | Ronan Codyre | Macleans College | 3:51.64 |
| 3 | William Johnston | St Peter's College (Auckland) | 3:51.87 |
| 4 | Cameron Maunder | Westlake Boys High School | 3:53.10 |
| 5 | Elliot Pugh | Bethlehem College | 3:53.44 |
| 6 | Etienne Calonne | Westlake Boys High School | 3:57.36 |
| 7 | Angus Monro | Glendowie College | 3:57.80 |
| 8 | James McLeay | Southland Boys High School | 3:58.98 |
| 9 | Angus Sevier | Cashmere High School | 3:59.01 |
| 10 | Ben Brunner | Wellington College | 3:59.07 |
| 11 | Tomas Barry | St Peter's College (Auckland) | 4:02.44 |
| 12 | Pai Wynyard | Kaiapoi High School | 4:02.97 |
| 13 | Callum O'Keeffe | Lindisfarne College | 4:03.37 |
| 14 | Callum Murray | Aquinas College | 4:05.12 |