Julian Robertson's position in Transdigm Group Incorporated is currently worth $463 Million. It makes up 2067.77% of their stock portfolio and is their biggest holding. Julian Robertson started to build up the position in Transdigm Group Incorporated in Q4 2008. Since then they sold 291 Thousand shares. The stake costed the investor $10.2 Million, netting the investor a gain of 4452% so far.