Private company
Who owns MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C.
One company in the researched set discloses a stake in MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C., worth $407m between them. MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C. is private, so no 13F reports it: a 13F covers exchange listed positions only. These figures exist because each holder disclosed the stake in its own filings.
The disclosed stakes
One row per position. Where a holder reports the same company in two share classes, both rows are shown rather than summed, because the class is part of a position's identity.
Where each figure comes from
A private stake has no ownership form behind it, so the source is always the holder's own filing or disclosure. Anything modelled says so, with the arithmetic.
- Marathon Petroleum Corporation, as of 31 Dec 2025. Held through MPLX. Deemed a variable interest entity of which MPLX is not the primary beneficiary, so equity-method accounted despite the majority economic interest. source
What this page is not
It is not a complete register. It lists the holders who happen to be inside the researched set and disclosed the stake themselves. A private company can have many other shareholders, and nothing here rules them out: venture investors, founders and employees usually appear in no public filing at all. Percentages are of MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C. where a holder stated one, and are missing where no holder did.