Artisan Partners Asset Management (NYSE: APAM) has announced that Jason White will join Matt Kamm as Co-Lead Portfolio Manager of the U.S. Mid-Cap Growth Strategy, effective January 1, 2025. White will maintain his existing role as Lead Portfolio Manager of the Global Discovery Strategy and Portfolio Manager of Global Opportunities and U.S. Small-Cap Growth strategies. Kamm will continue as Portfolio Manager of the Growth team's other three strategies. The Growth team will maintain its collaborative approach, with all key decision-makers having over 20 years of experience within this structure.