Private company
Who owns Office Venture LLC (100 Causeway Street)
One company in the researched set discloses a stake in Office Venture LLC (100 Causeway Street), worth $47m between them. Office Venture LLC (100 Causeway Street) 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.
Office Venture LLC (100 Causeway Street) - Profile
- Type
- joint venture
- Based in
- United States
Office Venture LLC holds 100 Causeway Street, the 31 storey, roughly 651,500 square foot office tower that forms the third and final phase of The Hub on Causeway in Boston's West End, a 1.5 million square foot mixed use complex built on the old Boston Garden site above North Station and adjoining TD Garden. The tower opened in May 2021, is certified LEED Platinum, and was leased to technology and media tenants: Verizon Communications took 440,000 square feet on a 20 year lease and the cybersecurity firm Rapid7 took about 147,000 square feet for its headquarters, alongside the offices of TD Garden, the Boston Bruins and the Boston Celtics. The building sits within a wider venture between BXP and Delaware North that also created the podium retail, the Hub50House apartments and a hotel. The entity itself was set up on 30 September 2025 as a structuring step alongside a mortgage financing, replacing the earlier Office Tower Developer LLC without changing the partners' rights.
Source
Office Venture LLC (100 Causeway Street) 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 The Hub on Causeway (Wikipedia), BXP's The Hub on Causeway Reconnects Boston Community (Nareit) and BXP, Inc. Form 10-K for 2025 (SEC). 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.
- BXP, Inc. (formerly Boston Properties), as of 30 Jun 2026. 50% joint venture interest in the 100 Causeway Street office component of the Hub on Causeway. Carrying value $46,968 thousand at 6/30/2026 vs $48,924 thousand at 12/31/2025. 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 Office Venture LLC (100 Causeway Street) where a holder stated one, and are missing where no holder did.