Prem Watsa's position in Sanofi is currently worth $545 Thousand. That's 0.03% of their equity portfolio (28th largest holding). Prem Watsa acquired their 11.4 Thousand shares between 2007 and 2009. So far they never sold any shares in the company. The stake costed the investor $316 Thousand, netting the investor a gain of 73% so far.