Transdigm Group is trading 4.95% up at $1,147.00 after hours, with the move’s cause unclear. - Shares closed at $1,092.93 on October 5, after the regular session rose 0.23%. - Search results found no confirmed October 5 after-hours company announcement explaining the jump. - An October 5 report covered BMO’s price-target cut, dated September 28, so it was not a new catalyst.