Jaguar Health (JAGX) shares were down 28% in premarket activity Friday, partially reversing the 9.8% rise in the previous session.

Nuburu (BURU) stock was 20% lower after a US Securities and Exchange Commission filing showed that selling stockholders may resell up to 20 million of the company's common shares.

MDxHealth (MDXH) shares were down 17%, a day after the company said it suspended its fiscal 2026 revenue guidance.

Orangekloud Technology (ORKT) stock was 15% lower, extending the 0.9% loss at the prior close.

Stardust Power (SDST) shares were down 15% after rising 55% at Thursday's close.