The Morningstar US Large-Mid Cap Index experienced a 17.71% increase in 2025. This index represents the performance of the largest 90% of the US investable market by market capitalization, and each year, we evaluate stocks within this index to identify the top and bottom performers. The data referenced in this article comes from Morningstar Direct.
Top Performing Stocks of 2025
Bottom Performing Stocks of 2025
Best Performing Stocks Metrics
Western Digital
- Sector: Technology
- Industry: Computer Hardware
- Economic Moat: None
Western Digital’s stock rose 5.56% in December, contributing to a total increase of 306.42% over the past year. It holds a Morningstar Rating of 3 stars, trading near its estimated fair value of $165.00.
Micron Technology
- Sector: Technology
- Industry: Semiconductors
- Economic Moat: None
Micron Technology gained 20.74% in December, achieving a yearly growth of 240.24%. The stock has a Morningstar Rating of 2 stars, trading at a 27% premium over its $225.00 fair value estimate.
Metrics for the Bottom Performing Stocks
The Trade Desk
- Sector: Communication Services
- Industry: Advertising Agencies
- Economic Moat: Narrow
The Trade Desk experienced a 4.04% decrease in December, resulting in a 67.70% decline over the year. Shares were 70.25% down from their peak on January 6, 2025. The stock holds a Morningstar Rating of 4 stars and trades at a 37% discount to its estimated fair value of $60.00.
