Pershing Square Foundation paid $188M for the roughly 400000-SF 125 West End Ave known as West End Labs and largely vacant buying from Taconic Partners and Nuveen Real Estate. It has contracted for the adjacent 320 West 66th St at $70M for a combined ~700000 SF to become the Ackman-Oxman Institute for brain research with Mount Sinai.
A philanthropic buyer cleared a vacant lab asset the institutional market had passed on. It is not underwriting IRR it is underwriting mission and that changes the comp.
The deal reframes adaptive reuse. Everyone watches office-to-resi; this is office and lab to institution anchored by a hospital systems demand. Taconic and Silverstein had bought the 3.4-acre campus for $230M in 2019.
Implications: Expect more institution- and mission-anchored acquisitions of stranded office and lab. Pricing reflects utility to a specific occupier not market cap rates.
Key Takeaways
- When the return buyer disappears the mission buyer sets the floor
- Stranded lab and office prices to use not to yield
Commercial Observer Jul 2026 Bill Ackman Buys 125 West End Avenue for Brain Research Center · The Real Deal Jul 28 2026 Bill Ackman locks down first site for brain research campus · Crains New York Jul 28 2026 Bill Ackmans Pershing Square Foundation buys UWS building
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