Krystal Biotech is trading 4.1% higher at $335.50 on October 5, 2026; no company-specific explanation is confirmed. - Its investor-relations news page lists no October 5 announcement; its latest release is dated September 3. - The S&P 500 is up 0.71% and Nasdaq is up 1.06%. These broader gains may be supportive context, but available reporting does not establish they caused Krystal Biotech’s move.