Research included in the recently released 50-page April Update to the 2018 edition of IC Insights’ McClean Report shows that in 2017, the top eight major foundry leaders (i.e., sales of ≥$1.0 billion) held 88% of the $62.3 billion worldwide foundry market (Figure 1). The 2017 share was the same level as in 2016 and one point higher than the share the top eight foundries represented in 2015. With the barriers to entry (e.g., fab costs, access to leading edge technology, etc.) into the foundry business being so high and rising, IC Insights expects this “major” marketshare figure to remain at or near this elevated level in the future.TSMC, by far, was the leader with $32.2 billion in sales last year. In fact, TSMC’s 2017 sales were over 5x that of second-ranked GlobalFoundries and more than 10x the sales of the fifth-ranked foundry SMIC.