Private company
Who owns Mountain Valley Pipeline, LLC - Series C (MVP Boost)
One company in the researched set discloses a stake in Mountain Valley Pipeline, LLC - Series C (MVP Boost), worth $399m between them. Mountain Valley Pipeline, LLC - Series C (MVP Boost) 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.
Mountain Valley Pipeline, LLC - Series C (MVP Boost) - Profile
- Type
- joint venture
- Based in
- United States
- Founded
- 2025
Series C of Mountain Valley Pipeline, LLC was created on 1 November 2025 as a new series of the Delaware series limited liability company to build and own the assets of MVP Boost, a compression project designed to raise the throughput of the existing MVP Mainline by about 0.6 billion cubic feet a day. The work adds compression at three existing compressor stations in West Virginia and builds one new compressor station in Virginia, avoiding new pipeline right of way. Mountain Valley Pipeline, LLC applied to the Federal Energy Regulatory Commission for construction authorisation on 23 October 2025 after an open season that drew more than 1 billion cubic feet a day of shipper interest from investment grade counterparties. The project is estimated to cost roughly 400 to 540 million dollars and is targeted for service by mid 2028. EQT operates the venture, whose members also include affiliates of NextEra Energy, AltaGas and RGC Resources.
Source
Mountain Valley Pipeline, LLC - Series C (MVP Boost) 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 EQT Corporation Form 10-K for 2025, Mountain Valley Pipeline, LLC Files Formal Application Requesting FERC Authorization to Construct MVP Boost and EQT Advancing MVP Expansions for Over 1 Bcf/d of Appalachian Natural Gas Takeaway Capacity. 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.
- EQT Corporation, as of 30 Jun 2026. 53.2% ownership interest as of 30 Jun 2026, up from 49.3% at 31 Dec 2025 (0% before Series C was formed on 1 Nov 2025), via the same Mar 2026 ConEd buy-out acquisition described for MVP A (an additional approximately 3.94% interest for $15.6 million). Carrying value $399,443 thousand as of 30 Jun 2026 versus $374,629 thousand at 31 Dec 2025. Series C (MVP C) is a contemplated project (MVP Boost) to add compression to MVP Mainline, projected to increase capacity by about 0.6 Bcf/day; not yet FERC-authorized as of 30 Jun 2026. Members as of 30 Jun 2026 are EQT and affiliates of NextEra, AltaGas, RGC and Vega. pct_of_target recorded as 53.2, a percentage. 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 Mountain Valley Pipeline, LLC - Series C (MVP Boost) where a holder stated one, and are missing where no holder did.