Juan Bautista 'Gianni' Vicini Cabral (Genoa, 7 April 1924–Santo Domingo, 27 April 2015) was an Italian-born Dominican businessman and chairman of the sugar company Grupo Vicini, the largest Dominican Republic corporation.
Vicini was born on 7 April 1924 in Genoa, Italy, during a vacation of his family, to the Italian-Dominican businessman Felipe Augusto Vicini Perdomo (half-brother of President Juan Bautista Vicini Burgos) and Dominican heiress Amelia María Cabral Bermúdez (daughter of José María Cabral y Báez and sister of José María Cabral Bermúdez).
He married Alma Stella Altagracia Lluberes Henríquez (1936–1992), the daughter of Mario Rafael Lluberes Abréu and Josefa Stella Henríquez Vásquez (a granddaughter of intellectual Federico Henríquez y Carvajal and diplomat Francisco Leonte Vásquez Lajara; the latter was brother of President Horacio Vásquez Lajara).
In 1936 his father died and Vinici became the chairman of Grupo Vicini, one of the largest sugar companies in the Dominican Republic.
During his tenure, Grupo Vicini became the main private sugar producer and afterwards the most important corporation in the Dominican Republic, with investments in many key economic sectors.