The bottling company said profit fell to 2 billion pesos (US$118 million), from 3.5 billion pesos in the year-earlier quarter.
The bank, the biggest still owned by Mexicans, reported a net profit of 4.284 billion pesos (US$253 million).
Constellation said it will invest more than US$2 billion in its Mexican operations to expand its bottling and brewery plant in Coahuila.