He was the richest person in Portugal at the time of his death with a fortune estimated of $4.8 billion.

[1] He owned a 50% interest in Corticeira Amorim, founded by his grandfather in 1870, and the world's largest producer of cork, with $650 million in sales.

[2] In 2005, he and Isabel dos Santos established Angola's Banco Internacional de Credito (BIC).

[2] His largest investment was an 18% stake in Galp Energia which he was chairman until October 2016 when he passed control to his eldest daughter Paula.

[2] Américo Amorim was married to Maria Fernanda de Oliveira Ramos, the daughter of medical doctor Manuel Pinto Moreira Ramos and Maria José Nunes de Oliveira, and had three daughters, including Paula.