Private company
Who owns Lumen joint venture
One company in the researched set discloses a stake in Lumen joint venture, none of it sized by anyone who discloses it. Lumen joint venture 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.
Lumen joint venture - Profile
- Type
- joint venture
- Based in
- Hong Kong
- Founded
- 2012
This is a fifty fifty data centre venture in Hong Kong, formed in 2012 between Digital Realty and Savvis, the managed hosting arm of CenturyLink that later became part of Lumen Technologies, which is where the venture's shorthand name comes from. It bought a 164,000 square foot industrial building in the Tseung Kwan O Industrial Estate in the New Territories, about 12 miles from central Hong Kong, in July 2012 and redeveloped it into a purpose built colocation facility using Digital Realty's modular design, delivering roughly 5.76 megawatts of IT load from mid 2013. The building was Digital Realty's first in Hong Kong and gave Savvis room to expand the colocation, managed hosting and cloud services it already sold in the territory. The venture is a single property holding, and Digital Realty manages it day to day.
Source
Lumen joint venture 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 Digital Realty and Savvis joint venture completes acquisition of Hong Kong data centre (PR Newswire), Digital Realty Trust, Inc. Form 10-K for 2022, note 8 (sec.gov) and Digital Realty and Savvis enter joint venture partnership to address high growth Hong Kong market (PR Newswire). 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.
- Digital Realty Trust, Inc., as of 30 Jun 2026. 10-Q Note 5 footnote (2): 'Lumen (50%)' within the combined APAC balance. The venture entity itself is not separately named; the partner is presumed to be Lumen Technologies (NASDAQ: LUMN) based on the filing's naming convention, not independently confirmed against a Lumen filing in this task. Combined-balance trap, value left null. 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 Lumen joint venture where a holder stated one, and are missing where no holder did.