Slice of Stock

Private company

Who owns Safeco Plaza REIT LLC (Safeco Plaza)

One company in the researched set discloses a stake in Safeco Plaza REIT LLC (Safeco Plaza), worth -$685,000 between them. Safeco Plaza REIT LLC (Safeco Plaza) 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.

Safeco Plaza REIT LLC (Safeco Plaza) - Profile

Type
joint venture
Based in
United States

Safeco Plaza REIT LLC is the venture that owns Safeco Plaza, a 50 storey office tower at 1001 Fourth Avenue in downtown Seattle carrying about 762,000 rentable square feet. Completed in 1969 to a design by NBBJ, the 630 foot building was the tallest in the Pacific Northwest until Columbia Center opened in 1985 and was the first skyscraper to use a Vierendeel space frame, and it includes a two storey lobby, underground parking, ground floor retail and a plaza holding a Henry Moore bronze installed in 1971. The tower was bought in 2021 and its tenants include law, banking and professional services firms, but Seattle's weak office market has told on it: the building was 77.5 percent leased at the end of 2025, it carries a 250 million dollar mortgage maturing in September 2026, and the venture wrote down the property by about 319.5 million dollars during 2025.

Source

Safeco Plaza REIT LLC (Safeco Plaza) 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 BXP, Inc. Form 10-K for 2025 (SEC EDGAR) and Safeco Plaza (Seattle) (Wikipedia). The ownership figures below come from the holders' filings instead, and are sourced row by row.

Disclosed holders1in the researched set
Disclosed value-$685,0001 of 1 positions carry a figure
Most recent measurement30 Jun 2026as of, not as reported
Visible to a 13FNoprivate company

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.

BXP, Inc. (formerly Boston Properties)BXP10-Qnot sized-$685,00033.7%

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.

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 Safeco Plaza REIT LLC (Safeco Plaza) where a holder stated one, and are missing where no holder did.