Private company
Who owns Mosaic Transit Partners General Partnership
One company in the researched set discloses a stake in Mosaic Transit Partners General Partnership, none of it sized by anyone who discloses it. Mosaic Transit Partners General Partnership 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.
Mosaic Transit Partners General Partnership - Profile
- Type
- partnership
- Based in
- Canada
- Founded
- 2018
Mosaic Transit Partners General Partnership is the special purpose project company, trading as Mosaic Transit Group, created solely to deliver the Finch West Light Rail Transit line in northwest Toronto under a design, build, finance and maintain contract awarded by Metrolinx and Infrastructure Ontario in 2018. Its partners are ACS Infrastructure Canada, Aecon Group and CRH Canada Group, each holding an equal third of the equity and construction interest, with Aecon and ACS each taking half of the 30 year maintenance term. The contract, worth about 2.5 billion Canadian dollars, covers a 10.3 kilometre line with 18 stops running along Finch Avenue West between Humber College and Finch West subway station, plus a maintenance and storage facility for 18 light rail vehicles. The line reached substantial completion in November 2025 and opened to passengers in December 2025.
Source
Mosaic Transit Partners General Partnership 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 Aecon: Aecon consortium celebrates delivery of first modern LRT system in Toronto, Aecon project page: Finch West LRT and Railway Track and Structures: Mosaic Transit Group awarded contract for Finch West LRT project. 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.
- CRH plc. Canada. Products/services: Special-purpose entity on infrastructure construction. Not consolidated: accounted for under the equity method. CRH's FY2025 10-K reports a single combined 'Equity method investments' balance of $737 million as of 31 Dec 2025 ($620 million at 31 Dec 2024, $649 million at 31 Dec 2023, per the Adjusted ROIC reconciliation in Item 7 MD&A) covering ALL of the entities in this exhibit table together. The filing does not disclose a per-investee carrying value, so value_usd is null here per the combined-balance rule; the combined figure is recorded in notes and unknowns, not assigned to this row. 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 Mosaic Transit Partners General Partnership where a holder stated one, and are missing where no holder did.