The top five chip companies are Samsung, Intel, TSMC, SK Hynix and Micron and they are expected to be responsible for 68 percent of all semiconductor capex, according to market analysis firm IC Insights.
Figure 1: Top five semiconductor capital expenditure as percentage of total. Source: IC Insights.
This is part of a long-term trend that has continued from the 1990s.
As can be seen in figure 2, TSMC has been tracking Samsung's capex through the year and according to 3Q19 conference calls the companies now plan to expand their capex to record-high levels in 4Q19.
Next: Figure 2