| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|---|
| 1 | 1 | 2 | Wayde VAN NIEKERK |
RSA |
43.62 | |
| 2 | 2 | 2 | Baboloki THEBE |
BOT |
44.02 | |
| 3 | 3 | 2 | Isaac MAKWALA |
BOT |
44.08 | |
| 4 | 4 | 2 | Vernon NORWOOD |
USA |
44.47 | |
| 5 | 5 | 2 | Michael CHERRY |
USA |
44.66 | |
| 6 | 6 | 2 | Tony MCQUAY |
USA |
45.28 | |
| 7 | 7 | 2 | Liemarvin BONEVACIA |
NED |
45.61 | |
| 8 | 1 | 1 | Joel Burgunder |
SUI |
46.57 | |
| 9 | 2 | 1 | Silvan Lutz |
SUI |
46.86 | |
| 10 | 3 | 1 | Daniele Angelella |
SUI |
46.88 | |
| 11 | 4 | 1 | Luca Flück |
SUI |
47.06 | |
| 12 | 5 | 1 | Ricky PETRUCCIANI |
SUI |
47.36 | |
| 13 | 6 | 1 | Charles DEVANTAY |
SUI |
47.36 | |
| 14 | 7 | 1 | Vincent Notz |
SUI |
47.67 | |
| 15 | 8 | 1 | Jérôme Bellon |
SUI |
47.93 | |
| 2 | Machel CEDENIO |
TTO |
DNF |