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
talks-2026-09-30,2026-09-30,day,Reported talks,primary_equity,Reported raise at $25B–$26B (TWG-led),,,,,,,Reported talks (Axios Pro); CSV cells empty,,,,,,,,"Axios Pro, 30 Sep 2026",https://www.axios.com/pro/all-deals/2026/09/30/walter-twg-colossal-investment,,Narrows the July 2026 reported range; not closed.,2026-11-13
talks-2026-07-20,2026-07-20,day,Reported talks,primary_equity,Reported raise at $20B–$30B,,,,,,,Reported talks (Axios via TechCrunch); CSV cells empty,,,,,,,,"TechCrunch, 20 Jul 2026",https://techcrunch.com/2026/07/20/colossal-biosciences-reportedly-in-talks-to-raise-new-capital-at-20b-30b-valuation/,,Axios later reported (30 Sep 2026) that TWG is expected to lead the round; not closed in the sources read.,2026-11-13
series-c-ext-2025-09-17,2025-09-17,day,Closed round,primary_equity,Series C extension,120000000,120000000,,"With: U.S. Innovative Technology Fund, Peter Jackson, Bob Nelson and others",10300000000,10300000000,Lower bound (Observer: valuation “now tops $10.3 billion”),,,,,,,,"Observer, 17 Sep 2025",https://observer.com/2025/09/colossal-biosciences-raises-120m-revive-dodo-bird/,,"Extension of the Jan 2025 Series C, announced with Colossal’s dodo research update.",2026-11-13
series-c-2025-01-15,2025-01-15,day,Closed round,primary_equity,Series C,200000000,200000000,TWG Global,,10200000000,10200000000,Valuation stated by Colossal,,,,6.8,,,,"Colossal, Jan 2025",https://colossal.com/colossal-biosciences-raises-200-million-series-c/,https://techcrunch.com/2025/01/15/colossal-biosciences-raises-200m-at-10-2b-valuation-to-bring-back-woolly-mammoths/ https://news.crunchbase.com/venture/de-extinction-startup-colossal-decacorn-twg-walter-tull/,"Total raised $435M after this round (Colossal). A $120M extension (Sep 2025) was announced via Business Wire but could not be fetched for verification, so it is not a row.",2026-11-13
series-b-2023-01,2023-01,month,Closed round,primary_equity,Series B,150000000,150000000,US Innovative Technology Fund,,1500000000,1500000000,"Reported valuation (TechCrunch, 2025)",,,,,,,,"Crunchbase News, 15 Jan 2025",https://news.crunchbase.com/venture/de-extinction-startup-colossal-decacorn-twg-walter-tull/,https://techcrunch.com/2025/01/15/colossal-biosciences-raises-200m-at-10-2b-valuation-to-bring-back-woolly-mammoths/,Month only. Led by Thomas Tull’s US Innovative Technology Fund (Crunchbase News).,2026-11-13
series-a-2022-03-09,2022-03-09,day,Closed round,primary_equity,Series A,60000000,60000000,,,,,,,,,,,,,"TechCrunch, 9 Mar 2022",https://techcrunch.com/2022/03/09/colossal-grabs-60-million-series-a-for-moonshot-mammoth-project/,,,2026-11-13