L3Harris Technologies is trading 17.02% up at $280 in after-hours trading after announcing new U.S. Navy defense agreements. - Received a $139 million award for submarine low-profile masts. - Signed a multi-year agreement to manufacture Tomahawk missile components. - These awards were the clearest catalyst for the sharp after-hours rally despite the broader market decline on September 23, 2026; trading-volume details were unavailable in the provided data.