The Swig Company Signs up New Tenants at 501 Second Street in San Francisco

March 19, 2025

The Swig Company has announced leases with two new tenants at 501 Second Street, a premier Class A office property in SOMA.

The tenants are LangChain, an open-source software framework that facilitates the integration of large language models into applications, and unitQ, an AI-enabled product quality monitoring platform.

  • LangChain signed a lease for 11,800 square feet and was represented by Blake Walker and Caroline O’Loughlin Livermore of CBRE.
  • unitQ signed a lease for 7,500 square feet and was represented by Will Cassriel and Grant Dettmer of JLL.
  • Mike McCarthy, Brian McCarthy, and Maddie Meyersieck of Transwestern represented The Swig Company in both transactions. 

“We’re happy to welcome LangChain and unitQ, two San Francisco-based enterprises advancing the application of artificial intelligence in business, to our diverse tenant community at 501 Second Street and look forward to supporting their future growth,” said Cory Kristoff, Director of Leasing, The Swig Company.

501 Second Street is a seven-story creative office building originally built as a warehouse in 1925. The building is LEED Platinum, WELL, and Energy Star rated. It features high ceilings, expansive views, onsite parking, upgraded common areas, bike rooms, and showers. It also has a large terrace which serves as an outdoor gathering space for tenants.

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About The Swig Company The Swig Company, LLC is a privately owned, San Francisco-based real estate operator with an 87-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, which includes investment, asset and property management, and leasing expertise, uses flexibility, generational thinking, and sensitivity to sustainable practices to stay at the forefront of emerging trends in the commercial real estate industry.  For more information, visit: www.swigco.com.