While the S&P 500 includes industry leaders, not every stock in the index is a winner. Some companies are past their prime, weighed down by poor execution, weak financials, or structural headwinds.

Even among blue-chip stocks, not all investments are created equal - which is why we built StockStory to help you navigate the market. That said, here are three S&P 500 stocks that don’t make the cut and some better choices instead.

Microchip Technology (MCHP)

Market Cap: $20.49 billion

Spun out from General Instrument in 1987, Microchip Technology (NASDAQ: MCHP) is a leading provider of microcontrollers and integrated circuits used mainly in the automotive world, especially in electric vehicles and their charging devices.

Why Is MCHP Risky?

1. Annual sales declines of 2.1% for the past five years show its products and services struggled to connect with the market during this cycle

2. Projected sales decline of 9% over the next 12 months indicates demand will continue deteriorating

3. Capital intensity has ramped up over the last five years as its free cash flow margin decreased by 13.4 percentage points

At $38.86 per share, Microchip Technology trades at 20.6x forward price-to-earnings. If you’re considering MCHP for your portfolio, see our FREE research report to learn more .

Campbell's (CPB)

Market Cap: $11.36 billion

With its iconic canned soup as its cornerstone product, Campbell's (NASDAQ:CPB) is a packaged food company with an illustrious portfolio of brands.

Why Are We Hesitant About CPB?

1. Declining unit sales over the past two years show it’s struggled to move its products and had to rely on price increases

2. Estimated sales growth of 1.4% for the next 12 months implies demand will slow from its three-year trend

3. Day-to-day expenses have swelled relative to revenue over the last year as its operating margin fell by 2.9 percentage points

Campbell's is trading at $38 per share, or 11.9x forward price-to-earnings. Check out our free in-depth research report to learn more about why CPB doesn’t pass our bar .

Union Pacific (UNP)

Market Cap: $126.9 billion

Part of the transcontinental railroad project, Union Pacific (NYSE:UNP) is a freight transportation company that operates a major railroad network.

Why Do We Avoid UNP?

1. Underwhelming unit sales over the past two years indicate demand is soft and that the company may need to revise its strategy

2. Falling earnings per share over the last two years has some investors worried as stock prices ultimately follow EPS over the long term

3. Capital intensity has ramped up over the last five years as its free cash flow margin decreased by 5 percentage points