Fal, the San Francisco-based generative media infrastructure startup, has locked in a lease for an entire floor at 300 Mission Street in downtown San Francisco. The expansion follows a late-2025 funding round that tripled the company’s valuation and comes as Fal accelerates hiring and builds out its engineering and commercial teams. The full-floor deal is yet another signal this year that well-funded AI firms are taking sizable chunks of office space in the Financial District.
According to the San Francisco Business Times, Fal signed for a full floor at 300 Mission Street in the South Financial District. The building’s efficient, column-free floors generally run in the high 20,000s of square feet, which suggests a single-floor commitment would be roughly 29,000 square feet, per Realmo. The company did not immediately disclose the exact square footage or a move-in schedule.
Fal’s funding-fueled growth has pushed its valuation sharply higher. The company tripled its valuation to about $4.5 billion after a $140 million Series D led by Sequoia, according to TechCrunch. That capital has underwritten the expansion of product operations and sales teams, which helps explain why Fal is now locking in more prominent office space.
Inside 300 Mission
300 Mission is a 24-story Class A tower with center-core floor plates and direct access to the Salesforce Transit Center, features that tend to appeal to fast-growing tenants. The property is listed among Paramount Group’s San Francisco holdings, which highlight the building’s large, efficient floors and downtown location. Brokers and owners have been active in the building this year as demand for high-quality downtown space shows signs of rebounding.
Industry data indicate that AI and technology tenants are driving much of that recent leasing activity. As outlined by Newmark, AI and tech companies represented just over half of current demand and helped power some of the largest lease transactions recorded in the first quarter of 2026. That wave of demand has pushed sizable blocks of Class A space back into positive absorption after several slow years.
Fal’s local hiring push helps explain the need for more room: job listings aggregated by AI Dev Jobs show dozens of open roles based in San Francisco for engineering and commercial teams. Requests for comment sent to Fal and the building’s landlord were not immediately returned.
