Marathon Petroleum, the parent company of MPLX (formerly called MarkWest Energy) announced some big changes last November. Namely, they caved to “activist” investors (we still call them corporate raiders) and their demands to split the company in three and dump the current CEO (see Partial Activist Victory: Marathon to Sell Speedway, CEO Retiring). The one thing the activists didn’t get was a commitment from Marathon to sell off the MarkWest/MPLX division. However, to keep the raiders happy, Marathon did commit to reviewing a sale of MPLX/MarkWest. The review is now done and yesterday Marathon announced not only will they keep MPLX/MarkWest, but the CEO of MPLX is also becoming the CEO of parent Marathon.