South of Market · Building 4 of 52 by AI share
AI tenants hold 98% of 550 3rd Street by observed square feet
Cognition holds 25,000 square feet on record. DataSF lists the building at 25,610. It is one of 15 San Francisco buildings that are at least half AI.
- AI share of building SF
- 98%
- AI square feet observed
- 25,000
- Building square feet (DataSF)
- 25,610
- AI tenants, October 2026
- 1
Tenants
AI tenants at 550 3rd Street, October 2026
| Company | Tier | Recorded from | Observed SF | Type | Sources |
|---|---|---|---|---|---|
| Cognition | AI infrastructure and tooling | December 2025 | 25,000 | Lease signed | Link |
Source: DataSF business registrations and DBI permits, SEC filings, press. Observed square feet only. Building square feet from the DataSF property record. "Recorded from" is the date of the registration or the press report of a signing, not a move-in date. See the building on the map.
Deals
Leases and subleases reported here
| Reported | Company | Type | SF | Source |
|---|---|---|---|---|
| August 2026 | Cognition | Lease signed | 25,000 | Link |
Nearby
Other measured buildings in South of Market
- 808 Brannan Street: Physical Intelligence, 98% AI
- 650 Townsend Street: Scale AI, 57% AI
- 850 Brannan Street: Physical Intelligence, 54% AI
- 475 Brannan Street: Recall.ai, 5% AI
Part of San Francisco AI tenants, a register of 223 AI companies at 271 locations built from public records. See all majority-AI buildings and the methodology.
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