Ken Griffin's position in MPLX LP - Unit is currently worth $30.7 Million. That's 0.03% of their equity portfolio (620th largest holding). The first MPLX LP - Unit trade was made in Q4 2014. Since then Ken Griffin bought shares 53 more times and sold shares on 37 occasions. The stake costed the investor $24.2 Million, netting the investor a gain of 27% so far.