Private company
Who owns Illinois Extension Pipeline Company, L.L.C.
One company in the researched set discloses a stake in Illinois Extension Pipeline Company, L.L.C., worth $208m between them. Illinois Extension Pipeline 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.
Illinois Extension Pipeline Company, L.L.C. - Profile
- Type
- joint venture
- Based in
- United States
- Founded
- 2015
Illinois Extension Pipeline Company owns the Southern Access Extension, a 168 mile crude oil pipeline of 24 inch diameter running across central Illinois from Enbridge's Flanagan terminal near Pontiac to the crude oil tank farm and trading hub at Patoka. The line carries heavy and light crude, much of it Canadian barrels arriving on Enbridge's mainline system, south to Patoka, where shippers can move it on to refineries in the Midwest and to pipelines heading for the Gulf Coast. It has a capacity of about 300,000 barrels per day, cost more than 900 million dollars to build and entered service around the end of 2015. The company is a joint venture between Enbridge, which operates the line, and Lincoln Pipeline, a Marathon Pipe Line subsidiary.
Source
Illinois Extension Pipeline Company, L.L.C. 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 Southern Access Extension Pipeline (Global Energy Monitor), Marathon Petroleum Corporation Form 10-K for FY2025 (SEC) and Patoka Oil Terminal (Wikipedia). 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. 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 Illinois Extension Pipeline Company, L.L.C. where a holder stated one, and are missing where no holder did.