| Date | Grandprix | Team | Winning Time | Leader Offset | Pos | Pts | Total |
| 07/03/1999 | Australia | Stewart | 95:1.659 | +0.54.698 | 5 | 2 | 2 |
| 11/04/1999 | Brazil | Stewart | Retirement - Engine | 0 | 2 | ||
| 02/05/1999 | San Marino | Stewart | 93:44.792 | +1 lap | 3 | 4 | 6 |
| 16/05/1999 | Monaco | Stewart | 109:31.812 | +7 laps | 9 | 0 | 6 |
| 30/05/1999 | Spain | Stewart | Retirement - Disq:8th-illegal Skidblock | 0 | 6 | ||
| 13/06/1999 | Canada | Stewart | Retirement - Accident damage | 0 | 6 | ||
| 27/06/1999 | France | Stewart | 118:24.343 | +0.43.432 | 3 | 4 | 10 |
| 11/07/1999 | Britain | Stewart | 92:30.144 | +1.8.59 | 8 | 0 | 10 |
| 25/07/1999 | Austrian | Stewart | Retirement - Engine | 0 | 10 | ||
| 01/08/1999 | Germany | Stewart | Retirement - Differential seal | 0 | 10 | ||
| 15/08/1999 | Hungary | Stewart | 106:23.536 | +0.43.808 | 5 | 2 | 12 |
| 29/08/1999 | Belgium | Stewart | 85:43.057 | +1.20.742 | 10 | 0 | 12 |
| 12/09/1999 | Italy | Stewart | 77:2.923 | +0.017.63 | 4 | 3 | 15 |
| 26/09/1999 | Europe | Stewart | 101:54.314 | +0.22.865 | 3 | 4 | 19 |
| 17/10/1999 | Malaysia | Stewart | 96:38.494 | +0.32.296 | 5 | 2 | 21 |
| 31/10/1999 | Japan | Stewart | 91:18.785 | +1 lap | 8 | 0 | 21 |