European defence technology start-up Helsing is in talks to raise almost $500mn from Silicon Valley investors including Accel and Lightspeed Venture Partners at a valuation of $4.5bn, tripling its price tag in less than a year, as global conflicts stoke a wave of private investment in military suppliers.
Accel and Lightspeed will be new investors in Helsing, said people familiar with the discussions, and are likely to be joined in the round by General Catalyst, an existing backer.
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