Ken Griffin acquired 314 Thousand Costco Wholesale shares worth $224 Million. That's 0.23% of their equity portfolio (76th largest holding). The first Costco Wholesale trade was made in Q2 2013. Since then Ken Griffin bought shares 58 more times and sold shares on 41 occasions. The stake costed the investor $77.7 Million, netting the investor a gain of 189% so far.