Tenax Therapeutics is trading 10.43% higher at $1.80 on October 22, 2026, with no verified company announcement explaining the gain. - A report published October 22 disclosed that major shareholder Adar1 Capital Management bought 331,979 shares on October 21; the filing does not establish this as the cause. - The Nasdaq Composite was down 2.39% and the S&P 500 down 1.26% in the supplied market context. - Available reports do not establish trading volume or unusual activity.