[
 {
  "company": "OpenAI",
  "company_id": "openai",
  "tier": "T1",
  "address": "575 Florida Street",
  "bldg_id": "B4017005",
  "sf": 100000,
  "month": "2020-12",
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  "event": "signed",
  "prior": null,
  "source": "https://missionlocal.org/2023/04/mission-office-vacancy-is-second-lowest-in-san-francisco/"
 },
 {
  "company": "Databricks",
  "company_id": "databricks",
  "tier": "T2",
  "address": "160 Spear Street",
  "bldg_id": "B3717005",
  "sf": 70000,
  "month": "2022-11",
  "semantics": "lease_signed_rsf",
  "event": "renewal",
  "prior": null,
  "source": "https://therealdeal.com/san-francisco/2022/11/21/databricks-inks-rare-office-expansion-in-san-francisco/"
 },
 {
  "company": "Hayden AI",
  "company_id": "hayden-ai",
  "tier": "T3",
  "address": "460 Bryant Street",
  "bldg_id": "B3763015",
  "sf": 41000,
  "month": "2023-06",
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  "event": "signed",
  "prior": null,
  "source": "https://www.sfexaminer.com/news/technology/ai-firms-gobbling-up-sf-space-outside-cerebral-valley/article_0aa610de-d82e-11ee-82b7-27b605ae6f40.html"
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 {
  "company": "Anthropic",
  "company_id": "anthropic",
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  "address": "394 Pacific Avenue",
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  "event": "signed",
  "prior": null,
  "source": "https://www.sfchronicle.com/sf/article/s-f-ai-expand-office-real-estate-market-18263127.php"
 },
 {
  "company": "Hex",
  "company_id": "hex",
  "tier": "T3",
  "address": "330 Jackson Street",
  "bldg_id": null,
  "sf": 8500,
  "month": "2023-08",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.jll.com/en-us/newsroom/ai-start-up-doubles-office-footprint-in-san-francisco"
 },
 {
  "company": "MindsDB",
  "company_id": "mindsdb",
  "tier": "T2",
  "address": "3154 17th Street",
  "bldg_id": null,
  "sf": 11000,
  "month": "2023-08",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.sfexaminer.com/news/technology/ai-companies-flocking-to-sf-mission-district-worry-neighbors/article_94eb416a-4201-11ee-800b-2f7470d883d4.html"
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 {
  "company": "Anthropic",
  "company_id": "anthropic",
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  "address": "500 Howard Street",
  "bldg_id": "B3721119",
  "sf": 230325,
  "month": "2023-09",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": "Slack",
  "source": "https://news.theregistrysf.com/ai-firm-anthropic-to-lease-230000-sqft-at-former-slack-hq-in-san-francisco/"
 },
 {
  "company": "OpenAI",
  "company_id": "openai",
  "tier": "T1",
  "address": "1455 3rd Street",
  "bldg_id": "B8721035",
  "sf": 486600,
  "month": "2023-10",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": "Uber",
  "source": "https://sfstandard.com/2023/10/27/openai-uber-headquarters-mission-bay/"
 },
 {
  "company": "Hive",
  "company_id": "hive",
  "tier": "T2",
  "address": "100 1st Street",
  "bldg_id": "B3721001",
  "sf": 57000,
  "month": "2023-12",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": "Okta",
  "source": "https://propmodo.com/ai-companies-are-looking-to-lease-office-space-in-san-francisco/"
 },
 {
  "company": "Unlearn.AI",
  "company_id": "unlearn-ai",
  "tier": "T3",
  "address": "303 2nd Street",
  "bldg_id": "B3749062",
  "sf": 17200,
  "month": "2024-02",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.costar.com/article/1165601565/this-data-healthcare-startup-becomes-latest-ai-firm-to-expand-in-san-francisco"
 },
 {
  "company": "OpenAI",
  "company_id": "openai",
  "tier": "T1",
  "address": "1455 3rd Street",
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  "sf": 486600,
  "month": "2024-03",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.sec.gov/Archives/edgar/data/1547361/000153949724002067/n4513_x14-424b2.htm"
 },
 {
  "company": "Sierra",
  "company_id": "sierra",
  "tier": "T3",
  "address": "235 2nd Street",
  "bldg_id": "B3736123",
  "sf": 41104,
  "month": "2024-07",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://news.theregistrysf.com/ai-startup-sierra-leases-41000-sqft-space-in-san-franciscos-soma-neighborhood/"
 },
 {
  "company": "OpenAI",
  "company_id": "openai",
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  "address": "550 Terry A Francois Boulevard",
  "bldg_id": "B8721011",
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  "event": "signed",
  "prior": "Old Navy",
  "source": "https://hoodline.com/2024/09/openai-bolsters-san-francisco-footprint-with-major-315k-square-foot-mission-bay-lease/"
 },
 {
  "company": "xAI",
  "company_id": "xai",
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  "address": "3180 18th Street",
  "bldg_id": "B3573003",
  "sf": 37000,
  "month": "2024-10",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": "OpenAI",
  "source": "https://traded.co/deals/california/office/lease/3180-18th-street/"
 },
 {
  "company": "Lambda",
  "company_id": "lambda",
  "tier": "T2",
  "address": "45 Fremont Street",
  "bldg_id": "B3710019",
  "sf": 20000,
  "month": "2024-12",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://news.theregistrysf.com/ai-company-lambda-takes-20000-sqft-in-san-francisco-at-shorensteins-45-fremont/"
 },
 {
  "company": "Scale AI",
  "company_id": "scale-ai",
  "tier": "T2",
  "address": "650 Townsend Street",
  "bldg_id": "B3784182",
  "sf": 180000,
  "month": "2024-12",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": "Airbnb",
  "source": "https://sfstandard.com/2026/04/07/i-leaderboard-san-francisco-office/"
 },
 {
  "company": "Databricks",
  "company_id": "databricks",
  "tier": "T2",
  "address": "1 Sansome Street",
  "bldg_id": "B0289003",
  "sf": 150000,
  "month": "2025-03",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.databricks.com/company/newsroom/press-releases/databricks-deepens-san-francisco-investment-new-office-and-multi"
 },
 {
  "company": "Truewind",
  "company_id": "truewind",
  "tier": "T3",
  "address": "577 2nd Street",
  "bldg_id": "B3774031",
  "sf": 5500,
  "month": "2025-04",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.truewind.ai/blog/our-new-sf-office-and-in-person-vs-remote"
 },
 {
  "company": "Salient",
  "company_id": "salient",
  "tier": "T3",
  "address": "1700 Montgomery Street",
  "bldg_id": "B0057001",
  "sf": 12600,
  "month": "2025-05",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.jamestownlp.com/news/san-franciscos-northern-waterfront-solidifies-position-as-emerging-ai-hub-with-over-43000-sf-in-new-office-leases"
 },
 {
  "company": "Glean",
  "company_id": "glean",
  "tier": "T3",
  "address": "634 2nd Street",
  "bldg_id": "B3788038",
  "sf": 30000,
  "month": "2025-06",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": "Cloudflare",
  "source": "https://news.theregistrysf.com/ai-firm-glean-takes-30000-sqft-in-san-francisco-in-sublease-deal-from-cloudflare/"
 },
 {
  "company": "EvenUp",
  "company_id": "evenup",
  "tier": "T3",
  "address": "353 Sacramento Street",
  "bldg_id": "B0237014",
  "sf": 10300,
  "month": "2025-07",
  "semantics": "lease_signed_rsf",
  "event": "move_in",
  "prior": null,
  "source": "https://news.theregistrysf.com/evenup-opens-new-10300-sqft-san-francisco-hq-at-353-sacramento/"
 },
 {
  "company": "Harvey",
  "company_id": "harvey",
  "tier": "T3",
  "address": "201 3rd Street",
  "bldg_id": "B3735059",
  "sf": 92814,
  "month": "2025-07",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://traded.co/deals/california/office/lease/201-3rd-street-1/"
 },
 {
  "company": "Greenlite AI",
  "company_id": "greenlite-ai",
  "tier": "T3",
  "address": "612 Howard Street",
  "bldg_id": "B3722020",
  "sf": 10000,
  "month": "2025-08",
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  "event": "signed",
  "prior": null,
  "source": "https://news.theregistrysf.com/greenlite-ai-signs-10000-sqft-lease-at-612-howard-in-san-francisco/"
 },
 {
  "company": "Resolve AI",
  "company_id": "resolve-ai",
  "tier": "T3",
  "address": "350 Rhode Island Street",
  "bldg_id": "B3957002",
  "sf": 37000,
  "month": "2025-08",
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  "prior": null,
  "source": "https://news.theregistrysf.com/resolve-ai-leases-37000-sqft-office-space-in-san-francisco/"
 },
 {
  "company": "Distyl AI",
  "company_id": "distyl-ai",
  "tier": "T3",
  "address": "55 Hawthorne Street",
  "bldg_id": "B3735046",
  "sf": 17511,
  "month": "2025-09",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://news.theregistrysf.com/distyl-ai-leases-17500-sqft-for-new-headquarters-in-san-franciscos-soma-district/"
 },
 {
  "company": "Anthropic",
  "company_id": "anthropic",
  "tier": "T1",
  "address": "505 Howard Street",
  "bldg_id": "B3736183",
  "sf": 100000,
  "month": "2025-09",
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  "event": "signed",
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  "source": "https://sfstandard.com/2025/09/23/anthropic-san-francisco-office-lease/"
 },
 {
  "company": "Anthropic",
  "company_id": "anthropic",
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  "address": "505 Howard Street",
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  "month": "2025-09",
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  "source": "https://news.theregistrysf.com/ai-giant-anthropic-doubles-down-on-san-francisco-with-104000-sqft-lease-as-office-market-shows-signs-of-life/"
 },
 {
  "company": "Abridge",
  "company_id": "abridge",
  "tier": "T3",
  "address": "450 Alabama Street",
  "bldg_id": null,
  "sf": 14000,
  "month": "2025-10",
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  "event": "signed",
  "prior": null,
  "source": "https://sfstandard.com/2025/10/07/abridge-ai-san-francisco-office-leasing/"
 },
 {
  "company": "Together AI",
  "company_id": "together-ai",
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  "address": "251 Rhode Island Street",
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  "source": "https://therealdeal.com/san-francisco/2025/10/28/together-ai-searches-for-more-office-space-in-san-francisco/"
 },
 {
  "company": "Vercel",
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  "address": "201 Mission Street",
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  "source": "https://news.theregistrysf.com/vercel-subleases-42000-sqft-at-201-mission-as-ai-boom-fuels-san-francisco-office-demand/"
 },
 {
  "company": "Chalk",
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  "address": "55 Stockton Street",
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  "source": "https://news.theregistrysf.com/ai-firm-chalk-leases-nearly-15000-sqft-at-55-stockton-in-san-francisco/"
 },
 {
  "company": "Recall.ai",
  "company_id": "recall-ai",
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  "address": "475 Brannan Street",
  "bldg_id": "B3787031",
  "sf": 14969,
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  "event": "signed",
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  "source": "https://news.theregistrysf.com/recall-ai-leases-15000-sqft-headquarters-at-475-brannan-in-san-francisco/"
 },
 {
  "company": "Abridge",
  "company_id": "abridge",
  "tier": "T3",
  "address": "208 Utah Street",
  "bldg_id": "B3932017",
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  "source": "https://sfstandard.com/2026/04/07/i-leaderboard-san-francisco-office/"
 },
 {
  "company": "Giga",
  "company_id": "giga",
  "tier": "T3",
  "address": "555 19th Street",
  "bldg_id": null,
  "sf": 25000,
  "month": "2026-02",
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  "prior": null,
  "source": "https://www.linkedin.com/feed/update/urn:li:activity:7424111921655754753"
 },
 {
  "company": "Baseten",
  "company_id": "baseten",
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  "address": "560 Davis Street",
  "bldg_id": "B0171068",
  "sf": 26000,
  "month": "2026-02",
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  "source": "https://news.theregistrysf.com/ai-inference-unicorn-baseten-signs-26000-sqft-lease-at-gaw-capitals-560-davis-in-san-francisco/"
 },
 {
  "company": "Medra",
  "company_id": "medra",
  "tier": "T3",
  "address": "1301 Folsom Street",
  "bldg_id": null,
  "sf": 38042,
  "month": "2026-02",
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  "event": "signed",
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  "source": "https://news.theregistrysf.com/medra-signs-38000-sqft-lease-at-1301-folsom-in-san-francisco-to-build-physical-ai-scientists/"
 },
 {
  "company": "Anthropic",
  "company_id": "anthropic",
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  "address": "300 Howard Street",
  "bldg_id": "B3719018",
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  "source": "https://compstak.com/blog/q1-2026-office-lease-deals-the-comps-that-set-the-national-bar"
 },
 {
  "company": "Hex",
  "company_id": "hex",
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  "address": "100 Montgomery Street",
  "bldg_id": "B0289005",
  "sf": 20000,
  "month": "2026-03",
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  "event": "expansion",
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  "source": "https://downtownsf.org/post/capital-concentration-downtown-san-francisco-and-the-physical-footprint-of-the-ai-boom"
 },
 {
  "company": "Zyphra",
  "company_id": "zyphra",
  "tier": "T1",
  "address": "415 Mission Street",
  "bldg_id": "B3720009",
  "sf": 25000,
  "month": "2026-03",
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  "event": "signed",
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  "source": "https://therealdeal.com/san-francisco/2026/03/24/flux-zyphra-the-latest-ai-firms-to-lease-in-san-francisco/"
 },
 {
  "company": "Reflection AI",
  "company_id": "reflection-ai",
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  "address": "140 New Montgomery Street",
  "bldg_id": "B3722080",
  "sf": 25000,
  "month": "2026-03",
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  "source": "https://therealdeal.com/san-francisco/2026/03/10/more-san-francisco-offices-leased-by-ai/"
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 {
  "company": "Flux",
  "company_id": "flux",
  "tier": "T3",
  "address": "340 Bryant Street",
  "bldg_id": "B3764061",
  "sf": 38000,
  "month": "2026-03",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://news.theregistrysf.com/flux-leases-38000-sqft-in-san-francisco-reviving-long-vacant-soma-office-building/"
 },
 {
  "company": "Physical Intelligence",
  "company_id": "physical-intelligence",
  "tier": "T1",
  "address": "808 Brannan Street",
  "bldg_id": "B3780004D",
  "sf": 60000,
  "month": "2026-03",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": "Airbnb",
  "source": "https://hoodline.com/2026/01/ai-upstarts-gobble-up-block-size-offices-in-showplace-square/"
 },
 {
  "company": "Decagon",
  "company_id": "decagon",
  "tier": "T3",
  "address": "680 Folsom Street",
  "bldg_id": "B3735013",
  "sf": 69358,
  "month": "2026-03",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://news.theregistrysf.com/decagon-ai-leases-69000-sqft-at-bxps-680-folsom-in-san-francisco-following-250mm-series-d-raise/"
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 {
  "company": "Perplexity",
  "company_id": "perplexity",
  "tier": "T3",
  "address": "181 Fremont Street",
  "bldg_id": "B3719450",
  "sf": 80561,
  "month": "2026-03",
  "semantics": "sublease_in_rsf",
  "event": "signed",
  "prior": "Meta Platforms",
  "source": "https://traded.co/deals/california/office/lease/181-fremont-street-3/"
 },
 {
  "company": "Anthropic",
  "company_id": "anthropic",
  "tier": "T1",
  "address": "400 Howard Street",
  "bldg_id": "B3720008",
  "sf": 100000,
  "month": "2026-03",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.connectcre.com/stories/anthropic-grows-san-francisco-footprint-yet-again/"
 },
 {
  "company": "Crusoe",
  "company_id": "crusoe",
  "tier": "T2",
  "address": "225 Bush Street",
  "bldg_id": "B0289001",
  "sf": 130234,
  "month": "2026-03",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://news.theregistrysf.com/crusoe-leases-130234-sqft-at-san-franciscos-iconic-225-bush-street-as-ai-infrastructure-firm-scales-bay-area-operations/"
 },
 {
  "company": "Anthropic",
  "company_id": "anthropic",
  "tier": "T1",
  "address": "500 Howard Street",
  "bldg_id": "B3721119",
  "sf": 240000,
  "month": "2026-03",
  "semantics": "lease_signed_rsf",
  "event": "signed",
  "prior": null,
  "source": "https://www.bisnow.com/news/san-francisco/office/anthropic-cements-240k-sf-lease-howard-street-133989"
 },
 {
  "company": "Databricks",
  "company_id": "databricks",
  "tier": "T2",
  "address": "1 Sansome Street",
  "bldg_id": "B0289003",
  "sf": 240000,
  "month": "2026-03",
  "semantics": "lease_signed_rsf",
  "event": "expansion",
  "prior": null,
  "source": "https://news.theregistrysf.com/databricks-expands-to-240000-sqft-at-one-sansome-as-ai-fueled-leasing-drives-record-absorption-in-downtown-san-francisco/"
 },
 {
  "company": "OpenAI",
  "company_id": "openai",
  "tier": "T1",
  "address": "1800 Owens Street",
  "bldg_id": "B8727007",
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 {
  "company": "Physical Intelligence",
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  "source": "https://traded.co/deals/california/office/lease/405-howard-street/"
 }
]