Private company
Who owns Tengizchevroil LLP (TCO)
One company in the researched set discloses a stake in Tengizchevroil LLP (TCO), none of it sized by anyone who discloses it. Tengizchevroil LLP (TCO) 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.
Tengizchevroil LLP (TCO) - Profile
- Type
- joint venture
- Based in
- Kazakhstan
- Founded
- 1993
Tengizchevroil is a Kazakh limited liability partnership that develops the Tengiz and Korolev crude oil fields in the Atyrau region of western Kazakhstan, across a licence area of about 2,500 square kilometres. Tengiz is one of the world's deepest and largest single reservoir oil fields, and TCO produces crude oil for export alongside sales gas, liquefied petroleum gas and large volumes of elemental sulfur recovered from the sour reservoir gas. It was formed in April 1993 under an agreement between the Republic of Kazakhstan and Chevron and operates under a concession running to 2033. Chevron and ExxonMobil supply the operating and sour gas handling technology and the bulk of the capital, KazMunayGas represents the Kazakh state and Lukoil holds a small interest. Its Future Growth Project, a third processing train plus sour gas reinjection that adds about 260,000 barrels a day, started up in 2025.
Source
Tengizchevroil LLP (TCO) 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 Tengizchevroil company page, Kazakhstan country page (Chevron) and Chevron achieves first oil at Future Growth Project in Kazakhstan. 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.
- Chevron Corporation. Ownership percentage is filed ('Chevron has a 50 percent equity ownership interest in TCO'). The 10-K states the carrying value of the TCO investment was about $62 million higher than Chevron's underlying equity in TCO's net assets at 31 Dec 2025, but does not state the carrying value itself, and the aggregate equity-method balance across all affiliates is not broken out by investee. value_usd is therefore null rather than estimated. 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 Tengizchevroil LLP (TCO) where a holder stated one, and are missing where no holder did.