The Swig Company Secures 33,000 SF in Leases at 501 Second Street, Bringing San Francisco Office Building to 98% Occupancy

The Swig Company has announced the signing of three leases totaling 33,000 square feet at 501 Second Street in San Francisco, bringing the building to 98% leased. The new tenants are SignalFire, Alkeon Capital, and Contentful, Inc.

Mike McCarthy, Maddie Meyersieck and Brian McCarthy of Transwestern represented The Swig Company in all three transactions.

New Tenants at 501 Second Street

SignalFire, an AI-native venture capital firm that serves early-stage startups from pre-seed to Series B, was represented by Carter Beim and Michaela LaLanne of Colliers in the transaction.

Alkeon Capital, a privately owned SEC-registered investment advisor, was represented by Blake Walker of CBRE.

Contentful, Inc., a digital experience platform that lets teams create, manage, and deliver personalized content at scale across any digital channel, was represented by Peter Hamann of Cushman & Wakefield.

"We're proud to have SignalFire, Alkeon Capital and Contentful as tenants of our building. Their continued presence speaks to the momentum at 501 Second and the growing concentration of innovative businesses here," said Stacia Keisner, Senior Vice President, Asset Management, The Swig Company. "These leases, together with other recent activity, have brought the building to near full occupancy, highlighting the strength of our location, amenities, and long-term investment in a well-designed space that resonates with leading companies."

Strong Leasing Activity in 2025

In 2025, The Swig Company signed over 91,000 square feet of space at 501 Second Street.

The building, originally constructed in 1925 and renovated in 1985, is LEED Platinum Certified, Energy Star rated, and WELL Health-Safety Rated.

Building Amenities and Features

501 Second Street offers onsite parking, a Mothers' Room, bicycle storage rooms, tenant storage, and showers. Tenants also have access to The Terrace at 501, an outdoor gathering space.

About The Swig Company

The Swig Company, LLC is a privately owned, San Francisco-based real estate operator with an 89-year history of investment, development, partnership, and management of commercial real estate properties in major U.S. markets. Founded by Benjamin H. Swig in 1936, The Swig Company is guided by a long-term investment perspective that has proven adept at stewarding investors safely through multiple market cycles.

The company's vertically integrated operational platform includes investment, asset and property management, and leasing expertise. The firm uses flexibility, generational thinking, and sensitivity to sustainable practices to stay at the forefront of emerging trends in the commercial real estate industry.

Sources

The Swig Company