Apart from the Frenchman, Swedes -- Andrea Myhrer and Mattias Haring -- also secured podium places finishing as the second and the third.
Kostelic thus secured 45 points, and tops the overall standings with 1075 points. Swiss Sylvan Zurbriggen won 14 points in Schladming and is the second-ranked in the overall standings with 643 points.
The best Croatian skier tops the slalom rankings with 478 points. He is followed by Grange (382) and Myhrer (333).