Private company
Who owns 360 PAS Holdco LLC (360 Park Avenue South)
One company in the researched set discloses a stake in 360 PAS Holdco LLC (360 Park Avenue South), worth $107m between them. 360 PAS Holdco LLC (360 Park Avenue South) 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.
360 PAS Holdco LLC (360 Park Avenue South) - Profile
- Type
- joint venture
- Based in
- United States
- Founded
- 2021
360 PAS Holdco LLC is the venture that owns 360 Park Avenue South, a 20 storey office building of roughly 450,000 square feet at the southwest corner of Park Avenue South and 26th Street in the Midtown South district of Manhattan. It was assembled in December 2021, when BXP bought the building for about 300 million dollars from Enterprise Asset Management and brought in the Canada Pension Plan Investment Board as its partner, with the property vacant after its single tenant left. The venture then gutted and rebuilt it, replacing building systems and adding collaborative lounges, conference facilities and a rooftop terrace, and it has since leased the tower to tenants including the trading firm Optiver, Grammarly, Marriott International, Ziff Davis, Iconiq and Hunter Point Capital. BXP bought out its partner's interest in early 2024 for one dollar plus a share of the venture's cash and mortgage debt.
Source
360 PAS Holdco LLC (360 Park Avenue South) 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 Extends Into Midtown South with 360 Park Avenue South Acquisition (BXP), BXP Announces Fourth Quarter and Full Year 2023 Results (BXP), Grammarly Inks 23K-SF Lease at BXP's 360 Park Avenue South (Commercial Observer) and Boston Properties Takes 360 Park Avenue South Stake for $1 (The Real Deal). 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. 71.11% joint venture interest in 360 Park Avenue South, Manhattan; despite the majority stake this venture is still treated as unconsolidated equity-method (BXP does not have unilateral control under the venture agreement). Carrying value $107,038 thousand at 6/30/2026 vs $104,778 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 360 PAS Holdco LLC (360 Park Avenue South) where a holder stated one, and are missing where no holder did.