Tanium expands Durham office presence at 555 Mangum

RALEIGH, N.C. (September 11, 2025) — JLL today announced that Tanium, a leader in Autonomous Endpoint Management (AEM), has expanded its footprint at 555 Mangum in Downtown Durham. After initially leasing 25,000 square feet in 2024, Tanium has signed an additional full-floor lease, bringing its total occupancy to 48,000 square feet. Tanium will take occupancy of its additional floor in early 2026. JLL Managing Directors Matt Winters and Kimarie Ankenbrand represented Tanium in both the initial lease and the most recent expansion.

Founded in 2007, Tanium provides endpoint management and security solutions to global organizations. With offices across North America, Europe and Asia, the company continues to grow its presence in the Triangle, where Durham offers access to a skilled talent pool and a thriving innovation ecosystem. The expansion at 555 Mangum, a modern, amenity-rich environment, allows Tanium to continue their growth by attracting top talent and strengthening its foothold in one of the Southeast’s most dynamic tech hubs.

“Tanium’s expansion supports its growing business and reflects the mounting demand for high-quality office space in Durham’s downtown,” said JLL’s Winters. “Buildings like 555 Mangum provide the location, amenities and flexibility that companies need to enable continued growth, foster employee satisfaction and attract top talent in an increasingly competitive market.”

Located at 555 Mangum Street, the 234,000-square-foot, Class-A office building is owned by Northwood Ravin and overlooks the Durham Bulls Athletic Park. Tenants enjoy premium amenities including a rooftop lounge, outdoor courtyard, state-of-the-art fitness facility, bike storage and The Lenny, a rooftop restaurant concept from Raleigh’s acclaimed Ibarra brothers. The property also offers immediate access to Durham’s thriving dining, retail and entertainment scene, with connectivity to major highways, public transit and Raleigh-Durham International Airport.

“Durham offers the talent, infrastructure and energy that make it an ideal location for our continued growth,” said Jake Semones, Director of Global Real Estate and Workplace at Tanium. “Adding a full floor at 555 Mangum strengthens our long-term presence in the market and supports our teams with the space and resources they need to excel.”

According to JLL’s Q2 Raleigh-Durham Office Report, demand continues to rise for modern, well-located workplaces that combine quality with functionality. With no new office deliveries expected until 2029, competition for high-quality space is expected to intensify, a trend that underscores why tenants like Tanium are acting now to secure additional space in amenity-rich buildings such as 555 Mangum.

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