Harvey AI signs last available space at 1 Madison, signaling AI’s role in Manhattan flagship deals

Harvey AI has signed the final available lease at 1 Madison, pushing the building to full occupancy, according to a weekly market report published by FNYR.

The deal is notable because it leaves a prominent Midtown property fully leased and underscores that AI tenants have moved from niche occupiers to relevant actors in high‑profile Manhattan office repositionings.

Broader market coverage shows leasing momentum in the first quarter of 2026. The Real Deal reported that Manhattan office leasing rallied to a strong quarter, and market notes from FNYR referenced AI‑related demand as part of that activity.

Public reporting on the Harvey AI lease is thin: the available sources do not disclose lease terms, square footage, or the landlord’s repositioning strategy, so the long‑term effects on rents, tenant mixes or future flagship deals remain unclear.

Even so, filling the last available block at 1 Madison provides a concrete example that AI companies are now a factor in Manhattan leasing discussions; further disclosed transactions will be needed to gauge whether this is an isolated win or part of a broader trend.