Senti Biosciences is trading 42.78% higher at $0.25, with no confirmed company-specific announcement explaining the after-hours move. - The price is versus the $0.18 October 26 regular-session close. - The company’s investor-relations releases page lists no October 26 announcement; no confirmed company-specific explanation surfaced in the sources reviewed. - At the October 15 meeting, shareholders approved the merger agreement and authorized a possible 1-for-20 to 1-for-50 reverse split. That earlier news does not establish the reason for the move; provided market indicators were mixed, leaving a broad-market explanation unconfirmed.