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Sigma Computing Joins Tenant Roster at SL Green’s One Madison Ave.
SL Green Realty Corp. has signed a new 64,077-square-foot lease with Sigma Computing, Inc. for a portion of the third floor at One Madison Ave., bringing the property to 78.1% leased. To date in 2025, SL Green has signed Manhattan office leases totaling 1,260,707 square feet, while maintaining a current pipeline of approximately 1.0 million square feet.
“We’re excited to welcome Sigma Computing to One Madison Avenue where they join a sterling tenant roster that includes IBM, Franklin Templeton, Coinbase, Flutter Entertainment and Palo Alto Networks,” said Steven Durels, EVP and director of leasing and real property at SL Green. “Midtown South leasing momentum has accelerated and we are encouraged by advanced discussions covering a significant portion of the remaining available space at the property.”
The tenant was represented by Brent Ozarowski, Jeff Rodgers and Stephen Cisarik of Newmark. The landlord was represented by Paul Glickman, Alex Chudnoff, Ben Bass and Diana Biasotti of JLL.
- ◦Lease
