Private company
Who owns Sherwood Midstream LLC
One company in the researched set discloses a stake in Sherwood Midstream LLC, worth $475m between them. Sherwood Midstream LLC 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.
Sherwood Midstream LLC - Profile
- Type
- joint venture
- Based in
- United States
- Founded
- 2017
Sherwood Midstream LLC is a natural gas processing venture in the Appalachian Basin, formed with effect from 1 January 2017 by MarkWest Liberty Midstream & Resources, a subsidiary of MPLX, and Antero Midstream Partners. It exists to serve Antero Resources' drilling across 195,000 gross acres of the Marcellus Shale in Ritchie, Tyler and Wetzel counties in West Virginia, with MarkWest contributing processing plants then under construction and operating the assets, and Antero Midstream contributing cash and releasing its processing rights over that acreage. The venture builds and owns cryogenic processing trains at the Sherwood complex in Doddridge County, West Virginia, which strips natural gas liquids out of wet Marcellus gas and is the largest gas processing complex in the northeastern United States. A companion entity, Sherwood Midstream Holdings, owns the shared infrastructure that supports those plants.
Source
Sherwood Midstream LLC files nothing with the SEC, so none of this comes from a filer record. The description was written for this site in August 2026 from MPLX LP Form 10-Q for the quarter ended 31 March 2017 (SEC) and MPLX LP Announces Formation of Strategic Joint Venture with Antero Midstream Partners LP (MPLX investor relations, 2017). The ownership figures below come from the holders' filings instead, and are sourced row by row.
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. 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 Sherwood Midstream LLC where a holder stated one, and are missing where no holder did.