id,date,date_precision,status,transaction_type,round,amount_usd_low,amount_usd_high,lead_or_buyer,co_leads,valuation_usd_low,valuation_usd_high,valuation_basis,valuation_to_run_rate_multiple,multiple_bound,multiple_basis,step_up_vs_prior_closed,price_per_share_usd_low,price_per_share_usd_high,shares,source,source_url,other_source_urls,notes,last_updated
series-e-2026-05-04,2026-05-04,day,Closed round,primary_equity,Series E,950000000,950000000,Tiger Global,With: GV,15800000000,15800000000,"Post-money, reported (CNBC)",,,,1.58,,,,"CNBC, 4 May 2026",https://www.cnbc.com/2026/05/04/bret-taylor-sierra-fundraise-openai.html,https://techcrunch.com/2026/05/04/sierra-raises-950m-as-the-race-to-own-enterprise-ai-gets-serious/,"Benchmark, Sequoia, Greenoaks and other existing investors participated (CNBC).",2026-11-14
round-2025-09-04,2025-09-04,day,Closed round,primary_equity,Growth round (Sep 2025),350000000,350000000,Greenoaks,,10000000000,10000000000,Stated by Sierra,,,,2.22,,,,"Sierra, 4 Sep 2025",https://sierra.ai/blog/theres-an-agent-for-that-and-it-runs-on-sierra,https://www.cnbc.com/2025/09/04/bret-taylor-sierra-ai-startup-salesforce-openai.html https://techcrunch.com/2025/09/04/bret-taylors-sierra-raises-350m-at-a-10b-valuation/,,2026-11-14
round-2024-10-28,2024-10-28,day,Closed round,primary_equity,Growth round (Oct 2024),175000000,175000000,Greenoaks,,4500000000,4500000000,Reported (TechCrunch),,,,,,,,"TechCrunch, 28 Oct 2024",https://techcrunch.com/2024/10/28/bret-taylors-customer-service-ai-startup-just-raised-175m/,https://techcrunch.com/2025/09/04/bret-taylors-sierra-raises-350m-at-a-10b-valuation/,,2026-11-14
round-2024-02-13,2024-02,month,Closed round,primary_equity,"Early funding (Sequoia, Benchmark)",110000000,110000000,Sequoia Capital,With: Benchmark,,,,,,,,,,,"Fortune, 13 Feb 2024",https://fortune.com/2024/02/13/bret-taylor-clay-bavor-ai-startup-sierra-110-million-funding-sequoia-benchmark/,https://techcrunch.com/2025/09/04/bret-taylors-sierra-raises-350m-at-a-10b-valuation/,Disclosed at launch in February 2024 as a cumulative total (Fortune).,2026-11-14