Willdan Group is trading 8.11% higher at $78.36 in pre-market on October 26 versus its October 23 close of $72.48, with no fresh announcement identified to explain the move. - The Mantis Innovation acquisition was announced September 22 and does not establish a direct cause. - Q3 results are scheduled for November 5. - Supplied broad-market indicators are mixed and modest, offering no clear explanation.