Tenax Therapeutics is trading at $1.75, up 7.36% after hours; no verified company-specific announcement dated October 21, 2026 explains the rise.
- Reported trial-enrollment news was announced October 8.
- The positive U.S. session saw the S&P 500 gain 0.52% and the Nasdaq Composite 1.07%; this backdrop does not establish the cause of the after-hours move.
- Shares rose in regular sessions October 19 and 20, then closed October 21 at $1.63.