Reported Sep 29, 2026 · Source: Bisnow
135 Madison Ave is an office lease in Midtown South / Flatiron / Chelsea / SoHo, New York. Other details we have: tenant Distyl AI (expanding by 15K SF); landlord Rosen family; size 30K SF total. Bisnow reports: “Hedge fund Castle Hook Partners signed a lease for the 52nd and 53rd floors of the under-construction, 53-story 625 Madison Ave. office building, according to a document filed with the city.” Bisnow reports: “Distyl AI expanded by 15K SF at the Rosen family’s 135 Madison Ave., taking up 30K SF across the entire ninth and 10th floors of the 175K SF property.”
Quoted from the article; the other facts come from our own deal listing.
Read the full report at Bisnow. What the article says:
Hedge fund Castle Hook Partners signed a lease for the 52nd and 53rd floors of the under-construction, 53-story 625 Madison Ave. office building, according to a document filed with the city.
Distyl AI expanded by 15K SF at the Rosen family’s 135 Madison Ave., taking up 30K SF across the entire ninth and 10th floors of the 175K SF property.
Article date: 2026-09-29T15:56:46-04:00
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