Shares of Synopsys and Cadence Design Systems jumped on Thursday after the U.S. lifted export curbs on chip design software to China, easing uncertainty around access to the crucial market.

The U.S. Department of Commerce has lifted the export restrictions on chip design technology destined for China, according to company disclosures released Wednesday evening. This development is part of ongoing trade negotiations between Washington and Beijing.

Siemens, Synopsys, and Cadence are key players in the electronic design automation (EDA) sector, which provides critical software and tools for developing semiconductors. The space is largely dominated by U.S.-based firms.