Private company
Who owns 501 K Street LLC (1001 6th Street)
One company in the researched set discloses a stake in 501 K Street LLC (1001 6th Street), worth $46m between them. 501 K Street LLC (1001 6th 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.
501 K Street LLC (1001 6th Street) - Profile
- Type
- joint venture
- Based in
- United States
501 K Street LLC holds the full city block in the Mount Vernon Triangle district of Washington, DC bounded by K Street, New York Avenue and Fifth and Sixth Streets NW, one block east of Mount Vernon Square, and is developing it as an office building of roughly 500,000 to 520,000 square feet. The scheme designed by Shalom Baranes Associates pairs Class A offices with about 29,000 square feet of ground floor retail and three levels of underground parking, and is organised around a central atrium under a 3,000 square foot skylight, with rooftop terraces, about 30,000 square feet of green roof, a fitness centre and bicycle facilities, targeting LEED Gold. The venture pairs BXP, which leads the development, with the Steuart Investment Company, and it chose to market the building as 1001 6th Street NW rather than by its 501 K Street address because the main entrance faces Sixth Street.
Source
501 K Street LLC (1001 6th 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 Address Formerly Known as 501 K (Bisnow), 1001 6th Street, NW (Shalom Baranes Associates) and BXP, Inc. Form 10-K for FY2025 (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 entity that owns 1001 6th Street. Carrying value $45,798 thousand at 6/30/2026 vs $45,724 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 501 K Street LLC (1001 6th Street) where a holder stated one, and are missing where no holder did.