Founders Fund, the venture capital firm led by Peter Thiel, has invested $624 million in Anduril's latest $4 billion funding round. This significant investment positions Founders Fund as one of the largest contributors in the round, which is spearheaded by Andreessen Horowitz and Thrive Capital. Anduril, an AI defense startup founded by Palmer Luckey, is expected to reach a valuation of $60 billion following this funding round.