Filtronic is trading 5.66% down at $3.50 on October 13, 2026, amid weakness across semiconductor stocks. - Investors reacted to reported memory-chip advances by Chinese chipmaker CXMT and concerns about AI investment and financing; this is sector context, not a confirmed company-specific catalyst. - No company-specific announcement explaining the decline surfaced. Filtronic’s latest disclosed SpaceX order was announced October 1, not today.