Positron AI, the premier company for American-made semiconductors and inference hardware, announced the close of a $51.6 million oversubscribed Series A funding round, bringing its total capital raised this year to over $75 million. The round was led by Valor Equity Partners, Atreides Management and DFJ Growth. Additional investment came from Flume Ventures, which includes tech icon Scott McNealy, Resilience Reserve, 1517 Fund and Unless.