The S&P Mid-Cap 400 serves as the barometer for the "Goldilocks" sector of the American economy. It tracks 400 medium-sized companies with market capitalizations generally ranging from $5 billion to $16 billion. These aren't the experimental startups found in small-cap indexes, nor are these the saturated giants of the S&P 500. Instead, mid-caps represent established businesses that have moved past their initial survival phase and are now focused on scaling operations. These companies are often in their "prime growth" years, so the index has historically outperformed its small and large-cap counterparts over long-term horizons.
For private investors in 2026, the S&P Mid-Cap 400 has become increasingly relevant as a diversification tool against concentration risk. The S&P 500 is currently dominated by a handful of massive technology firms, meaning a standard index fund leaves investors heavily exposed to just one or two sectors. The mid-cap space includes more industrials, consumer discretionary, and financials which are not dependent on the largest tech players.
Selecting stocks from this index requires more than just looking at stock prices. Obermatt uses a purely data-driven 360° View to rank stocks against their industry peers across four financial and non-financial pillars: Value (pricing), Growth (expansion), Safety (debt levels), and Sentiment (market confidence). The Top 10 list below includes the quiet winners, those companies that excel in financial discipline and steady market-share gains rather than media hype. Because we filter out the noise in the market, a household name may be absent from the list if the stock isn’t a strong performer by our standards.
Even if we know that the most famous stocks aren't always the best investments, investors need to know which other stocks to consider. The Top 10 list below gives you the best performing stocks in the S&P Mid-Cap 400 for your consideration.
Name | 360° View | Sentiment | Combined | Value | Growth | Safety |
|---|---|---|---|---|---|---|
1. X-Large • Pharmaceuticals | 100 | 100 | 82 | 47 | 88 | 60 |
2. X-Large • Oil & Gas Equipment | 100 | 69 | 100 | 100 | 66 | 94 |
3. Large • Gas Utilities | 100 | 99 | 92 | 97 | 63 | 57 |
4. Large • Industrial Machinery | 100 | 67 | 100 | 50 | 83 | 100 |
5. Large • Aerospace & Defense | 100 | 99 | 94 | 48 | 83 | 90 |
6. X-Large • Automotive Retail | 100 | 99 | 88 | 97 | 33 | 68 |
7. Large • Biotechnology | 100 | 71 | 100 | 89 | 85 | 100 |
8. X-Large • Restaurants | 100 | 94 | 100 | 90 | 94 | 91 |
9. Large • Electr. Manufacturing Services | 100 | 46 | 89 | 1 | 99 | 98 |
10. Large • Application Software | 100 | 67 | 100 | 62 | 91 | 98 |
- Elanco Animal Health (ELAN)
A global leader in animal health, Elanco develops and markets products and services to prevent and treat disease in farm animals and pets. The company is a key player in the pharmaceutical space, focusing on innovation that improves animal well-being and food supply chain efficiency. - NOV Inc. (NOV)
NOV is a leading provider of equipment and technology to the global energy industry, specifically focusing on oil and gas drilling and production. They are renowned for their technical expertise in hardware and digital solutions that optimize field operations. - UGI Corporation (UGI)
UGI is a diversified energy distribution company that operates a massive network of gas utilities and propane distribution across the U.S. and Europe. The firm provides essential energy infrastructure, focusing on reliable delivery and storage services. - Mueller Industries (MLI)
This company is a leading manufacturer of copper, brass, aluminum, and plastic products, primarily serving the plumbing, HVAC, and industrial markets. Mueller is a staple of the industrial machinery sector, providing the foundational components used in residential and commercial construction. - Carpenter Technology (CRS)
A specialized leader in the aerospace and defense sector, Carpenter Technology manufactures high-performance specialty alloys and stainless steels. Their materials are critical for extreme environments, such as jet engines and medical implants. - Lithia Motors (LAD)
Lithia Motors is one of the largest automotive retailers in the U.S., scaling through a massive network of physical stores and advanced e-commerce platforms. The company excels at acquiring underperforming dealerships and applying a highly efficient, data-driven operating model. - BioMarin Pharmaceutical (BMRN)
BioMarin is a high-growth biotechnology company that develops and commercializes innovative therapies for people with serious and life-threatening rare genetic diseases. They are leaders in enzyme replacement therapies and gene therapy research. - Aramark (ARMK)
Aramark is a global provider of food, facilities, and uniform services to clients in education, healthcare, and business. The company manages complex service environments, focusing on operational scale and consumer experience in the restaurant and hospitality sectors. - Fabrinet (FN)
Fabrinet provides precision optical, electro-mechanical, and electronic manufacturing services to original equipment manufacturers (OEMs). They specialize in complex, high-mix production for industries like telecommunications, automotive, and industrial lasers. - Pegasystems (PEGA)
A leader in application software, Pegasystems provides a powerful platform for AI-powered customer engagement and operational excellence. Their low-code platform helps many of the world’s largest brands automate complex business processes and personalize customer interactions.