Defense tech investment boom sparks bubble warning as private equity pours in

Private equity firms are pouring billions into defense technology as rising military spending and geopolitical tensions fuel an investment boom. Traditional buyout investors are increasingly backing younger, high-growth firms in the sector, according to PitchBook data, with private equity growth investments in defense reaching $4 billion in the first nine months of 2026, up from $500 million in 2024. As defense tech companies mature, analysts say private equity, debt and other forms of financing are expected to become more important in bridging the gap between innovation and industrial-scale production, as venture capital alone may not be enough to finance companies' expansion.