Private company
Who owns Source One GmbH
One company in the researched set discloses a stake in Source One GmbH, none of it sized by anyone who discloses it. Source One GmbH 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.
Source One GmbH - Profile
- Type
- private company
- Based in
- Germany
Source One is a plastic waste sourcing and engineering company based in Leiferde, Lower Saxony, Germany. It advises and then operationally implements circular economy projects for producers, brand owners, retailers, waste collectors, sorters and reprocessors as well as municipalities and governments, and it specialises in technical solutions for hard to recycle post consumer plastic waste. Its shareholders combine 23 Oaks Investments, the German investor behind its sorting ventures, the compliance scheme operator Landbell Group, which brings access to collected packaging waste volumes, and the chemicals producer LyondellBasell, which takes the resulting feedstock into its advanced recycling operations.
Source
Source One GmbH 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 LYB acquires minority stake in Source One (LyondellBasell), LyondellBasell Industries N.V. 2025 Form 10-K, Exhibit 21 List of Subsidiaries and Source One GmbH company profile (DevelopmentAid). 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.
- LyondellBasell Industries N.V.. Exhibit 21.1 to the FY2025 10-K (filed 20 Feb 2026) states that LyondellBasell Industries Holdings B.V. owns a 24.9% interest in Source One GmbH. This is a 24.9 percent ownership interest, written here as the number 24.9, not as a fraction of 100. LyondellBasell's balance sheet carries a single combined 'Equity investments' line ($3,963 million at 31 Dec 2025 per the 10-K; $3,875 million at 30 Jun 2026 per the most recent 10-Q) covering all equity-method investees together, so no individual carrying value is disclosed for this venture: value_usd is null. sourcesource 2
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 Source One GmbH where a holder stated one, and are missing where no holder did.