Jack Welch led GE from 1981-2001, transforming it into the world's largest and most valuable company. He focused on restructuring, downsizing, and acquisitions. Under Jeff Immelt from 2001 onward, GE shifted from a performance-driven culture to prioritizing customer satisfaction and diversity. While continuing Welch's focus on growth, Immelt emphasized external recruitment, social responsibility, and innovation through new research initiatives. Overall, Welch and Immelt both grew GE substantially through different strategic approaches and leadership styles.