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-d-2024-10-16,2024-10-16,day,Closed round,primary_equity,Series D,400000000,400000000,T. Rowe Price Associates,,4400000000,4400000000,Stated by Lightmatter,,,,,,,,"SiliconANGLE, 16 Oct 2024",https://siliconangle.com/2024/10/16/lightmatter-raises-400m-4-4b-valuation-next-gen-photonic-data-center-networking/,https://techcrunch.com/2024/10/16/lightmatters-400m-d-round-has-ai-hyperscalers-hyped-for-photonic-datacenters/ https://lightmatter.com/press-release/lightmatter-raises-400m-series-d-quadruples-valuation-to-4-4b-as-photonics-leader-for-next-gen-ai-data-centers/,Existing investors Fidelity Management & Research and GV joined (SiliconANGLE).,2026-11-14
series-c2-2023-12-19,2023-12-19,day,Closed round,primary_equity,Series C-2,155000000,155000000,,,1200000000,1200000000,Stated (Lightmatter; Gunderson Dettmer),,,,,,,,"Lightmatter, 19 Dec 2023",https://lightmatter.com/press-release/lightmatter-accelerates-growth-and-expands-photonic-chip-deployments-with-155m-in-new-funding-now-valued-at-1-2b/,https://www.gunder.com/en/news-insights/client-news/lightmatter-announces-155m-series-c-2-and-new-1-2b-valuation,,2026-11-14
series-b-2021-05-06,2021-05-06,day,Closed round,primary_equity,Series B,80000000,80000000,Viking Global Investors,,,,,,,,,,,,"TechCrunch, 6 May 2021",https://techcrunch.com/2021/05/06/lightmatters-photonic-ai-ambitions-light-up-an-80m-b-round/,,"With HP Enterprise, Lockheed Martin, SIP Global Partners, GV, Matrix Partners and Spark Capital (TechCrunch).",2026-11-14