Datavault AI (DVLT) stock was down 40% in Tuesday's premarket activity after the company announced in a US Securities and Exchange Commission filing that over a year's worth of its financial statements can no longer be relied upon due to an accounting error involving a $150 million Bitcoin-backed equity deal.

SunScout (SNSC) shares were 20% lower, extending the 13% loss at Monday's close. A waiver of lock-up restrictions announced on Oct. 23 is slated to take effect on Tuesday.

RedCloud (RCT) stock was down 12% after an 8.7% rise in the prior session, when the company said it has fully repaid its outstanding senior convertible notes using a non-dilutive shareholder loan.

Masonglory (MSGY) shares were 11% lower, partially reversing the previous session's 28% rise.

Azitra (AZTR) stock was down 10%, a day after the company announced trial results for its cosmetic product candidate, ATR-COSF, and said it has suspended its at-the-market offering program for the foreseeable future.