Group 1 - ATI's shares increased by as much as 12.9% in early trading due to strong third-quarter earnings and an increase in full-year guidance, indicating positive momentum heading into 2026 [1] - The company generates approximately 86% of its revenue from the aerospace and defense sectors, with 60% specifically from commercial jet engine products [2] - The aerospace market is characterized by a limited number of customers, primarily driven by aircraft production from Boeing and Airbus, as well as engine manufacturing from GE Aerospace, RTX's Pratt & Whitney, and Rolls-Royce [3] Group 2 - Several competitors in the aerospace sector, including GE and RTX, have reported accelerating growth and raised their full-year guidance, reflecting a positive trend in the industry [4] - The aerospace supply chain is recovering, leading to improved availability of parts, which enhances growth outlooks for both ATI and its competitors [6] - ATI raised its full-year earnings per share guidance to $3.15-$3.21 from $2.90-$3.07, indicating strong expectations for 2026 [7]