Corteva (CTVA) shares were down 79% in Thursday premarket activity after the company said that a US District Court denied California's request to temporarily block the planned separation of its seed business into a new publicly traded company called Vylor.

NFT (MI) stock was 62% lower, extending a 3.6% decline in the Wednesday session.

Vivakor (VIVK) shares were down 23% after the company said it will conduct a 1-for-15 reverse stock split to increase its share price and support continued listing on the Nasdaq Capital Market.

Scienture (SCNX) stock was 22% lower after the company said it will effect a 1-for-25 reverse stock split of its outstanding common shares.

Grande Group (GRAN) shares were down 17%, reversing a 24% rise in the previous session.