Flagship office bet, Kilroy Realty’s 100 First Street targets AI tenants

San Francisco landlord Kilroy Realty is doubling down on premium office with 100 First Street, a LEED Platinum tower positioned for AI and tech tenants in the city’s SoMa district. The flagship property combines high-spec workspace, sustainability credentials and transit access.

Edited by ad hoc news Flagship & Bestseller Desk. Reviewed before publication on 06/15/2026 at 2:25 PM ET. Details in the imprint.

San Francisco’s premium office market remains under pressure, but Kilroy Realty’s flagship tower at 100 First Street is designed to compete for the city’s AI and tech tenants with high-spec space, sustainability credentials and direct transit access.

What 100 First Street offers prospective tenants

100 First Street is a roughly 27-story, Class A office tower in San Francisco’s South of Market area, offering modern floor plates suited to technology, legal and financial services firms.

The property is marketed with LEED Platinum certification, reflecting upgrades to building systems, energy efficiency and environmental performance that align with large corporate tenants’ ESG requirements.

Located two blocks from the Salesforce Transit Center and close to multiple BART and Muni lines, the tower emphasizes transit-oriented access for workforces commuting from across the Bay Area.

Within Kilroy’s West Coast portfolio, 100 First Street sits alongside other high-profile office assets in San Francisco, Seattle, San Diego and Los Angeles, forming part of the landlord’s focus on modern, amenity-rich workplaces.

For investors, the tower underscores Kilroy’s ongoing bet on high-quality urban office despite sector headwinds, while shares of Kilroy Realty (US49427R1086) traded on the NYSE at $34.88 on 06/14/2026.

Kilroy’s 100 First Street in brief

• Product: 100 First Street, San Francisco office tower
• Manufacturer: Kilroy Realty Corp.
• Category: Flagship / Class A office property
• Launch date: Original construction in the late 1980s; subsequently renovated and upgraded
• MSRP / Price: Not applicable (leased office space; rents negotiated with tenants)
• Availability: Office space marketed for lease in San Francisco’s South of Market district
• Target audience: Technology, professional services and financial firms seeking modern, transit-accessible Class A office space
• Key differentiator / USP: Combination of LEED Platinum sustainability, central SoMa location and integration into Kilroy’s broader West Coast office portfolio

This article was a.i.-assisted and editorially reviewed. Product information without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Trading involves risk up to and including the total loss of invested capital.