FiEE (MINM) shares were up 37% in recent Thursday premarket activity, after the company said Wednesday it signed an asset purchase deal with Suzhou Yixuntong Network Technology to buy intellectual property and fixed assets for $1.4 million.

Xponential Fitness (XPOF) stock rose 21%, a day after the company said in a regulatory filing that the US Securities and Exchange Commission concluded its probe in the company "without action."

Mira Pharmaceuticals (MIRA) shares climbed 18%, a day after the company said in a regulatory filing that preclinical results for its Mira-55 drug candidate demonstrated morphine-comparable pain relief in a validated animal model of inflammatory pain.

Datadog (DDOG) stock was 9% higher after S&P Dow Jones Indices said overnight that the company will join the S&P 500, effective July 9.

Synopsys (SNPS) shares were up 4.5% after the company said late Wednesday that the Bureau of Industry and Security of the US Department of Commerce notified it that export restrictions related to China have been "rescinded," effective immediately.