| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Henry Boyhan | Sacred Heart College (Auckland | 52.45q |
| 2 | Chris Whitley | Christchurch Boys High School | 52.94q |
| 3 | Benson Oosterbaan | Wellington College | 53.20q |
| 4 | Nick Hutchinson | Christ's College | 53.31q |
| 5 | Callum Allen | Napier Boys High School | 53.52 |
| 6 | Rhys Malcom | Westlake Boys High School | 54.76 |
| 7 | Damien Scott | St John College | 55.78 |
| 8 | Ross Campbell | Otago Boys High School | 59.07 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Tom Smith | St Pauls Collegiate (Hamilton) | 53.38q |
| 2 | Thomas McArdle | St John College | 53.63q |
| 3 | Fletcher Greaves | St Patrick's College (Silverst | 53.68q |
| 4 | Morgan Thomson | Timaru Boys' High School | 54.03 |
| 5 | Dhruv Raman | Rathkeale College/Trinity Sen | 54.22 |
| 6 | Jake Tully | Napier Boys High School | 56.16 |
| 7 | Cameron Hartwell | Glendowie College | 56.88 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Ollie Ranby | Tauranga Boys' College | 52.42q |
| 2 | Tom Martin | St Bede's College | 52.62q |
| 3 | Chris McNoe | Otago Boys High School | 52.72q |
| 4 | Edward Hewitt | Rathkeale College/Trinity Sen | 52.91q |
| 5 | Ethan Campbell | James Hargest College | 52.98q |
| 6 | Daniel Henderson | Hamilton Boys High School | 53.66 |
| 7 | Finn Horsfield | Sacred Heart College (Auckland | 54.41 |
| 8 | Henry Chamberlain | Timaru Boys' High School | 55.63 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Bailey Stewart | Sacred Heart College (Auckland | 51.58q |
| 2 | Jonty Rae | St Pauls Collegiate (Hamilton) | 52.01q |
| 3 | Cody Benck | Dunstan High School | 52.58q |
| 4 | Quin Hartley | Palmerston North Boys High Sch | 52.92q |
| 5 | Taylor Wynn | Hamilton Boys High School | 53.66 |
| 6 | Leonidis Smith | Wellington College | 54.65 |
| -- | Sam Watson | Otago Boys High School | DNF |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Henry Boyhan | Sacred Heart College (Auckland | 51.89q |
| 2 | Ollie Ranby | Tauranga Boys' College | 52.29q |
| 3 | Tom Martin | St Bede's College | 52.46q |
| 4 | Quin Hartley | Palmerston North Boys High Sch | 52.88q |
| 5 | Ethan Campbell | James Hargest College | 53.12 |
| 6 | Chris McNoe | Otago Boys High School | 53.13 |
| 7 | Benson Oosterbaan | Wellington College | 53.62 |
| 8 | Chris Whitley | Christchurch Boys High School | 54.61 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Tom Smith | St Pauls Collegiate (Hamilton) | 50.65q |
| 2 | Jonty Rae | St Pauls Collegiate (Hamilton) | 50.76q |
| 3 | Bailey Stewart | Sacred Heart College (Auckland | 50.83q |
| 4 | Edward Hewitt | Rathkeale College/Trinity Sen | 52.84q |
| 5 | Cody Benck | Dunstan High School | 53.54 |
| 6 | Thomas McArdle | St John College | 53.72 |
| 7 | Nick Hutchinson | Christ's College | 54.41 |
| 8 | Fletcher Greaves | St Patrick's College (Silverst | 54.83 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Tom Smith | St Pauls Collegiate (Hamilton) | 48.71 |
| 2 | Henry Boyhan | Sacred Heart College (Auckland | 48.87 |
| 3 | Jonty Rae | St Pauls Collegiate (Hamilton) | 49.66 |
| 4 | Bailey Stewart | Sacred Heart College (Auckland | 50.11 |
| 5 | Ollie Ranby | Tauranga Boys' College | 50.31 |
| 6 | Tom Martin | St Bede's College | 50.84 |
| 7 | Quin Hartley | Palmerston North Boys High Sch | 51.96 |
| 7 | Edward Hewitt | Rathkeale College/Trinity Sen | 51.96 |