Mark Hallum

Mark Hallum covers leasing, sales and everything in between for Commercial Observer with a focus on New York City. In the past, he has covered transportation, politics and crime on the local level.

Mark Hallum @markuusan
Rockefeller Group's Daniel Moore (top), Atlas Capital Group's Jeffrey Goldberger (center) and Andrew Cohen, and 200 West 97th Street.
Special Purpose · Investments & Sales
New York City

Catholic Church Sells 200 West 97th Street to Housing Developers for $96M

By Mark Hallum
CBRE's Cassie Durand.
Retail · Leases
New York City

Cassie Durand of CBRE: 5 Questions

By Mark Hallum
Chairman and CEO Marc Holliday and the SL Green logo displayed on a mobile phone.
Office · Capital Markets
New York City

SL Green Reports Q4 Earnings With Strong NYC Economic Outlook

By Mark Hallum
Carlyle Group CEO Harvey Schwartz and a Manhattan Mini Storage location.
Industrial · Investments & Sales
New York City

StorageMart Builds on Expanding NYC Portfolio With $1B Acquisition

By Mark Hallum
President and COO Jonathan Gray and the Blackstone logo displayed on a mobile phone.
Industry · Capital Markets
National

Blackstone Earnings Continue to Grow With $2.2B in Q4 2025

By Mark Hallum
Avison Young's Michael Gottlieb (top), Joel Wechsler (center) and Patrick Steffens (bottom), and 220 West 19th Street.
Office · Leases
New York City

E-Payment Platform Flowglad Makes NYC Office Debut in Chelsea

By Mark Hallum
CEO Peter Moglia and Alexandria Real Estate's Center for Life Sciences in Manhattan.
Life Sciences · Capital Markets
National

Alexandria Plans $581M in Dispositions as Leasing Struggles Persist

By Mark Hallum
GFP Real Estate's Jeffrey Gural and 675 Avenue of the Americas.
Office · Leases
New York City

Billing Platform Candid Health Signs 29K-SF Lease at 675 Avenue of the Americas

By Mark Hallum
The Domino Sugar Refinery Building in Brooklyn.
Office · Leases
New York City

Brooklyn’s Office Market Is Mirroring Trends in Manhattan

By Mark Hallum
Matthew Weir, president of Elevate Research Properties, and Hudson Research Center.
Life Sciences · Leases
New York City

Jackson Laboratory Takes 41K SF at Hudson Research Center

By Mark Hallum
RTL's Thomas Galo and 686 Grand Street, Brooklyn.
Retail · Leases
New York City

United Xtreme Martial Arts Signs 2,400-SF Lease in Williamsburg

By Mark Hallum
RIPCO's Andrew Mandell. 2475 Broadway.
Retail · Leases
New York City

Petco Signs 10-Year Renewal at 2475 Broadway on the Upper West Side

By Mark Hallum
R. Stokes Moore (left) and Marisa Gadlin.
Office · Players
New York City

Rockefeller Group Names New Investment and Administrative Leaders

By Mark Hallum
888 Seventh Avenue.
Office · Leases
New York City

Sessa Capital Expands to 10K SF at Vornado’s 888 Seventh Avenue

By Mark Hallum
Bradford Allen's Glenn Isaacson and 805 Third Avenue.
Office · Leases
New York City

South African Consulate Signs 31K-SF Lease at 805 Third Avenue

By Mark Hallum
Cushman & Wakefield's Josh Kuriloff (top), Matthias Li (center) and Heather Thomas (bottom), and 1411 Broadway.
Office · Leases
New York City

United Hospital Fund Renews Lease at 1411 Broadway

By Mark Hallum
Ryan Simonetti, president and CEO of Convene Hospitality Group, and a rendering of The Aperture.
Office · Leases
New York City

Convene Parent to Bring 1,000-Capacity Events Venue to Flatiron District

By Mark Hallum