4DMedical is trading at A$2.41, up 12.09%, with no clear company-specific catalyst confirmed. - A “Becoming a substantial holder” announcement was listed for November 5, but available details do not identify the holder or explain the rise. - 4DMedical previously said it knew of no undisclosed information and cited increased short interest as a possible explanation for earlier volatility. - That earlier comment does not confirm the cause of the November 5 move.