Tenable is trading 10.6% down at $43.56 before the October 29, 2026 open, amid a broad software-sector selloff; available company news does not explain the decline as a negative earnings reaction. - Q3 results beat expectations, with revenue of $276.4 million; management raised 2026 revenue guidance to $1.084B–$1.087B. - Reuters reported software shares fell pre-market after disappointing Fortinet and ServiceNow results, while Alphabet’s results also pressured the sector. No source directly linked Tenable’s decline to those events.