Jeff BezosAmazon CEO Jeff BezosPhoto by Drew Angerer/Getty Images

October was a rough month for billionaires in the tech sector, who saw their net worth plummet as stocks took a hammering. 

According to Bloomberg data, the CEOs and founders of the most popular tech companies “FAANG+BAT” lost $61 billion in October.

The tech-heavy Nasdaq index plunged 9.2%, posting its worst month since the financial crisis.

And among the hardest hit were the “FAANG+BAT” stocks —  Facebook  (-7.7%)Apple (-3.1%), Amazon (-20.2%) Netflix (-19.3%), Google (-9.8%), Baidu (-16.9%), Alibaba (-13.6%) and Tencent (-14.1% in Hong Kong). 

The list below provides details of the estimated net worth of some of tech’s richest CEOs and founders: