Financial Trading Firm Optiver Doubles Down on Midtown South with Major Expansion at BXP Tower

In a significant vote of confidence for Midtown South's office market, global market maker Optiver has dramatically expanded its footprint at 360 Park Avenue South, signaling that demand for quality office space remains robust among financial services firms.

The trading firm, which has maintained a presence at the BXP-owned tower, tacked on an additional 92,000 square feet, effectively doubling down on its commitment to the location. With this expansion, Optiver now controls approximately 115,000 square feet within the building, establishing itself as one of the property's anchor tenants.

According to Commercial Observer, the Optiver expansion is part of a larger wave of leasing activity at the property, with four tenants combining to cover 184,000 square feet of space.

Key Details

The expansion deal underscores several important specifics:

• Tenant: Optiver, a leading electronic market maker headquartered in Amsterdam with significant U.S. operations
• Landlord: BXP (formerly Boston Properties), one of the largest office REITs in the United States
• Property: 360 Park Avenue South, a premier office tower in Manhattan's coveted Midtown South submarket
• Expansion Size: 92,000 square feet added
• Total Footprint: Approximately 115,000 square feet post-expansion
• Total Building Activity: 184,000 square feet across four tenants

Market Impact

This expansion carries several implications for commercial real estate professionals tracking Manhattan's recovery trajectory.

First, the deal reinforces the "flight to quality" trend that has defined post-pandemic office leasing. BXP's well-managed, amenity-rich properties continue to attract tenants willing to commit to substantial footprints, even as older Class B and C buildings struggle with elevated vacancy rates.

Second, the financial services sector—particularly trading and fintech firms—continues to prioritize physical office presence. Unlike some technology companies that have embraced remote work policies, market makers like Optiver often require collaborative environments and sophisticated trading infrastructure that favor in-person operations.

Third, Midtown South's appeal endures. The submarket has historically commanded premium rents due to its tech-friendly culture and transit accessibility, and deals of this magnitude suggest that institutional tenants remain committed to the area's long-term viability.

For landlords and brokers, the message is clear: well-positioned assets with strong ownership will continue to capture tenant demand, particularly from financial services firms seeking stable, professional environments. The challenge remains for older stock to compete in an increasingly bifurcated market.

Related coverage: Midtown Apparel Tenant Jack Victor Nearly Doubles Footprint at 8 West 40th Street · Top-Tier Offices Drive Washington Leasing as Broader Market Stays Under Pressure · Billion-Dollar Deals and Leasing Gains Mark a Busy Week for Commercial Real Estate

What the Expansion Signals

Trading firms can have unusually demanding requirements for power, connectivity, security, and business continuity. An expansion therefore speaks to the building's ability to support a specialized user, not only to the appeal of its address. Details on the term, improvement package, and commencement date would help quantify the landlord's economics.

The deal is also one piece of a highly segmented office market. A large commitment from a growing financial firm can improve absorption at the property while older or less connected buildings continue to struggle. Market participants should compare Optiver's lease with sublease availability, renewal activity, and effective rents in Midtown South before extending the result to the broader office inventory.