According to Charlie Bilello, the combined revenues of Amazon ($AMZN), Apple ($AAPL), Google ($GOOGL), and Microsoft ($MSFT) have reached a record $1.86 trillion over the past 12 months. This figure surpasses the GDP of all but 13 countries, underlining the immense financial dominance of these tech giants. Investors may find this significant as it highlights the massive scale and market influence of these companies.