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Sigma Computing

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One Madison Avenue in Manhattan NYC, SL Green’s Marc Holliday
New York
Mar 9, 2026

SL Green’s One Madison is fully occupied

AI firm doubled footprint to 185K sf in Midtown South
SL Green Embraces AI Tenant at One Madison
New York
Oct 17, 2025

SL Green embraces AI tenant at One Madison

Tech company Harvey leases 93K sf at Midtown South tower
Sigma Computing inks 64k sf lease at SL Green’s One Madison
New York
Jul 16, 2025

Sigma Computing inks 64k sf lease at SL Green’s One Madison

Tech company joins IBM, Coinbase at Midtown South tower

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