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-b-extension-2026-04-09,2026-04-09,day,Closed round,primary_equity,Series B extension,,,,"With: New investors include Google, Factorial, Macquarie Capital, Mouro Capital (Santander), In-Q-Tel",,,No valuation stated for the extension,,,,,,,,"Sakana AI, 17 Nov 2025 (updated 9 Apr 2026)",https://sakana.ai/series-b/,,"Sakana updated its Series B announcement on 9 Apr 2026: the round now totals ¥32B (about $200M by Sakana’s own figure), up from ¥20B. The amount added is not shown as a separate figure, so this row is not summed.",2026-11-13
series-b-2025-11-17,2025-11-17,day,Closed round,primary_equity,Series B (first close),135000000,135000000,,"With: MUFG, Khosla Ventures, NEA, Lux Capital and others",2650000000,2650000000,"Post-money, CEO David Ha to TechCrunch",,,,,,,,"TechCrunch, 17 Nov 2025",https://techcrunch.com/2025/11/17/sakana-ai-raises-135m-series-b-at-a-2-65b-valuation-to-continue-building-ai-models-for-japan/,https://sakana.ai/series-b/,Raised in yen; ~$135M is TechCrunch’s figure. Japanese press reported the post-money as about ¥400B.,2026-11-13
series-a-2024-09-04,2024-09-04,day,Closed round,primary_equity,Series A,200000000,200000000,"New Enterprise Associates, Khosla Ventures, Lux Capital","With: NVIDIA, Translink Capital and Japanese corporates (MUFG, SMBC, Mizuho, KDDI and others)",,,,,,,,,,,"Sakana AI, 4 Sep 2024",https://sakana.ai/series-a/,,,2026-11-13
seed-2024-01-16,2024-01-16,day,Closed round,primary_equity,Seed,30000000,30000000,Lux Capital,With: Khosla Ventures,,,,,,,,,,,"Sakana AI, 16 Jan 2024",https://sakana.ai/seed-round/,,,2026-11-13