Former ASML worker accused of selling secrets

Dutch court to hear IP theft case.
ASML’s downgraded sales forecast has sent semiconductor stocks tumbling amid concerns of oversupply.

A Rotterdam court is set to hold a pretrial hearing on Monday concerning a former Russian employee of ASML accused of stealing intellectual property from the Dutch semiconductor equipment maker. The suspect, a 43-year-old Russian national, allegedly profited by selling company manuals, including those of ASML’s Mapper subsidiary, to Russian buyers, according to Dutch media reports.

ASML, which acquired Mapper in 2019, confirmed its awareness of the case and said it had filed a formal complaint, declining further comment during ongoing legal proceedings. The suspect is reportedly in custody, though details of the arrest remain unclear.

Mapper, a Dutch firm focused on developing E-beam lithography technology, was integrated into ASML following its 2019 bankruptcy. While Mapper’s product did not succeed, its engineers joined ASML’s chip-measuring business, helping to bolster the company’s capabilities. This acquisition eased concerns about sensitive technology falling into foreign hands, a priority for both the Dutch government and the US military.