Synopsys and Cadence both said that they were working on doing the same. The U.S. Commerce Department did not immediately respond to a request for comment from CNBC.
The U.S. had informed the chip design software companies on May 23 that they were required to obtain licenses before exporting software and other technology for semiconductors to China. It followed an earlier tightening of export controls on other semiconductor products, which restricted the sales of advanced AI processors from Nvidia and AMD to China.
Shares of Synopsys and Cadence each climbed about 3% Thursday.