According to my list Coco Rocha has never walked for:
Armani Privé
Blumarine
Calvin Klein
Chloé
Christopher Kane
Comme Des Garcons
Dries Van Noten
Dsquared
Emporio Armani
Giambattista Valli
Gianfranco Ferré
Giorgio Armani
Haider Ackermann
Hugo Boss
Isabel Marant
Loewe
Maison Martin Margiela
Moschino
Moschino Cheap & Chic
Nina Ricci
Rochas
Tommy Hilfiger
Armani Privé
Blumarine
Calvin Klein
Chloé
Christopher Kane
Comme Des Garcons
Dries Van Noten
Dsquared
Emporio Armani
Giambattista Valli
Gianfranco Ferré
Giorgio Armani
Haider Ackermann
Hugo Boss
Isabel Marant
Loewe
Maison Martin Margiela
Moschino
Moschino Cheap & Chic
Nina Ricci
Rochas
Tommy Hilfiger