New York City Office Investment
We buy Manhattan office buildings with strong bones and real upside.
Vertex Properties owns five office buildings in Manhattan and Long Island City. Four transactions closed since November 2025, representing approximately $460 million of total capitalization. Olmstead Properties is our exclusive operator and our partner, investing its own capital alongside ours in every building we buy in New York City.
The Platform
Capital that can close. An operator that can execute.
Vertex Properties is a New York City–based investment platform actively expanding its office portfolio, targeting assets with strong fundamentals and clear repositioning upside.
Olmstead Properties is our exclusive operator and our partner. Olmstead makes a meaningful investment in every building Vertex buys in New York City, so its capital sits alongside ours in each deal. Separately, and on its own account, Olmstead owns, manages and leases a 4.5 million square foot Manhattan portfolio — which is what gives Vertex an operating engine most buyers of this size do not have.
Sellers and brokers deal with one decision-maker, not a committee. That combination is why the platform has closed four transactions in eight months, including an all-cash purchase and a recapitalization. We underwrite fast, we do not retrade, and we put a full-time operating team behind every building on day one.
Vertex is backed by two New York real estate families, the Arnows and the Rosenblatts. The Arnow family has developed more than 10 million square feet of office and residential property since the 1930s. The Rosenblatt family has owned and run Olmstead Properties since its founding in 1930, now in its fourth generation under Samuel W. Rosenblatt.
Our own money is in every deal.
The sponsorship invests significant equity in every acquisition we make — at least 10 percent of the capitalization, and typically well in excess of 20 percent. We believe that creates proper alignment and gives our investors the comfort of knowing the sponsorship group has real, significant money at risk beside theirs.
Olmstead Properties
Our exclusive operator, and a partner that invests alongside Vertex in every building we buy in New York City. One of New York City’s longest-standing real estate firms, in business since 1930.
- Olmstead’s own Manhattan portfolio4.5M SF
- Olmstead’s income-producing properties30+
- Olmstead’s portfolio leased~95%
- Owned in whole or part by partners70%+
- In business since1930
Current Portfolio
Five buildings. Four transactions in eight months.
A demonstrated ability to perform and close — in cash, through a recapitalization, and off-market.
373 & 381 Park Avenue South
- Combined size
- 356,740 SF
- 381 Park Avenue South
- 244,546 SF · 17 storeys · built 1910
- 373 Park Avenue South
- 112,194 SF · 12 storeys · built 1911
- Floor plates
- 14,531–14,710 RSF (381) · 9,029–9,171 RSF (373)
- Purchase price
- $104,000,000
- Seller
- ATCO Properties & Management
- Leased since closing
- 95,000 SF
- Leasing agent
- Olmstead Properties, Inc.
Two boutique prewar buildings delivering immediate scale on Park Avenue South — 381 on the southeast corner of 27th Street with an ornate terracotta facade and light and air on all four sides; 373 between 26th and 27th with highly desirable full-floor plates. Repositioning underway with COOKFOX Architects.
61 Crosby Street
- Size
- 32,400 SF
- Composition
- 24,300 SF office · 8,100 SF retail
- Storeys
- 5
- Floor plates
- 5,250–6,350 SF
- Built / redeveloped
- 1900 · 2018
- Purchase price
- $53,000,000, all cash
- Leasing agent
- Olmstead Properties, Inc.
A boutique SoHo loft building between Spring and Broome, in the SoHo–Cast Iron Historic District. The 2018 redevelopment restored the historic facade, added a penthouse with terrace, and upgraded all building systems and interiors — oversized operable windows, wood floors, exposed brick and open ceilings throughout.
114 Crosby Street
- Size
- 143,523 SF
- Structure
- Recapitalization
- Total deal size
- $121,000,000
- Status
- Fully leased
A full-block SoHo loft building with entrances on both Crosby Street and Broadway, recapitalized in March 2026 with a repositioned lobby, amenity floor and rooftop.
19 West 44th Street
- Size
- 302,000 SF
- Built
- 1916
- Purchase price
- $108,000,000
- Seller
- Savanna
- Certification
- LEED Gold
- Leasing agent
- Olmstead Properties, Inc.
A landmark-quality Midtown tower between Fifth and Sixth Avenues, purchased at a substantial discount to prior basis, with roughly 23,000 SF of new prebuilt suites.
43-01 22nd Street
- Size
- 215,000 SF
- Built
- 1925
- Acquired
- 2016
- Leasing agent
- Rhonda Singer, GFP
A full-block loft building at the centre of Long Island City’s creative and office district, minutes from Midtown on seven subway lines.
The Vertex Strategy
We don’t race to the bottom on rent.
The office is not dead. The status quo is dead. Cutting rents to fill space is the one move every owner in this market can make, which is exactly why it creates no advantage. We take a deliberate, multi-pronged approach tailored to the needs of each individual asset, designed to make the building itself the reason a tenant signs — and to position it to outperform its submarket.
Life-enriching amenities
Childcare, food and beverage, fitness, and genuine third places built into the building — amenities that change how a workday feels, not a lounge nobody uses.
Diversified tenancy
Artists, non-profits and early-stage companies alongside established tenants. A deliberately mixed rent roll fills space faster, keeps downtime short, and makes a building interesting.
Sustainability, early
We upgrade ahead of climate legislation rather than behind it. Buildings that already meet what is coming avoid the penalties and the capital shock that catch everyone else.
Timing — nine years on the sidelines
Our previous New York acquisition was in 2016. Stepping back was deliberate: we thought the market had become too expensive. We spent those years backing multifamily developers in Boston and Pittsburgh and building our Irish projects. We are now solely focused on New York.
Alignment — our own money first
The sponsorship puts significant equity into every deal — at least 10 percent, typically well over 20 percent. Our investors know the people making the decisions have real money at risk beside theirs.
Basis, then exit
Acquire at a discount to replacement cost, differentiate the asset, stabilise the rent roll, then refinance or sell into a recovered market. The discount going in is what makes everything after it work.
In the Press
19 West 44th Street
Coverage of the platform’s most recent acquisition — a 302,000 square foot, LEED Gold building between Fifth and Sixth Avenues, purchased from Savanna for $108 million in June 2026.
“We are continuing to execute on the strategy we laid out with the launch of Vertex — targeting well-located Manhattan office buildings where active ownership and thoughtful leasing can unlock value.”
Track Record
Two New York families behind one platform.
Vertex is backed by the Arnow and Rosenblatt families — one that built a substantial share of the modern Manhattan skyline, one that has owned and operated New York buildings for four generations.
Generations of building in New York.
Over multiple generations the Arnow family has developed more than 10 million square feet of office and residential property across the United States, with a primary focus on New York City. A significant portion of the family’s holdings was sold in 1997; the family continues to own a portfolio of legacy assets.
Generations of ownership in New York.
The Rosenblatt family has owned and run Olmstead Properties since its founding in 1930 and is now in its fourth generation under Samuel W. Rosenblatt, a partner in Vertex. Across those generations the family has owned, repositioned and operated some of Manhattan’s best-known loft and office buildings.
Bring Us a Deal
If you have a Manhattan office building, we would like to see it.
We look at everything in Manhattan between $50 and $350 million. We move quickly, we underwrite in-house, and we do not retrade. Off-market introductions are welcome and treated in confidence.
