Daniel Loeb's position in OSI Systems is currently worth $28.6 Million. That's 0.40% of their equity portfolio (26th largest holding). The investor owns 1.25% of the outstanding OSI Systems stock. Daniel Loeb acquired their 204 Thousand shares between 2001 and 2008. So far they never sold any shares in the company. The stake costed the investor $4.66 Million, netting the investor a gain of 513% so far.