The S&P 500 closed slightly higher on Friday. Investors, meanwhile, focused on some notable insider trades.

When insiders sell shares, it indicates their concern in the company's prospects or that they view the stock as being overpriced. Either way, this signals an opportunity to go short on the stock. Insider sales should not be taken as the only indicator for making an investment or trading decision. At best, it can lend conviction to a selling decision.

Below is a look at a few recent notable insider sales. For more, check out Benzinga's insider transactions platform.

NVIDIA

• The Trade: NVIDIA Corporation (NASDAQ:NVDA) EVP and CFO Colette Kress sold a total of 10,741 shares at an average price of $200.00. The insider received around $2.15 million from selling those shares.
• What's Happening: Keybanc recently maintained NVIDIA with an Overweight and lowered the price target from $230 to $220.
• What NVIDIA Does: Nvidia is the top designer of discrete graphics processing units that enhance the experience on computing platforms.

Check This Out: 'I Say, Thumbs Up': Jim Cramer On This Stock Up 25% Over Last Month

Wynn Resorts

• The Trade: Wynn Resorts, Limited (NASDAQ:WYNN) CEO Craig Scott Billings sold a total of 10,310 shares at an average price of $102.35. The insider received around $1.06 million as a result of the transaction.
• What's Happening: Wells Fargo recently maintained an Overweight rating on the stock and raised its price target from $101 to $125.
• What Wynn Resorts Does: Wynn Resorts operates luxury casinos and resorts.

Have a look at our premarket coverage here

Morgan Stanley

• The Trade: Morgan Stanley (NYSE:MS) Director Alistair Darling sold a total of 2,000 shares at an average price of $94.70. The insider received around $189.41 thousand from selling those shares.
• What's Happening: Morgan Stanley recently reported better-than-expected Q4 EPS and sales results.
• What Morgan Stanley Does: Morgan Stanley is a global investment bank whose history, through its legacy firms, can be traced back to 1924.

Micron Technology

• The Trade: Micron Technology, Inc. (NASDAQ:MU) EVP, Technology & Products Scott Deboer sold a total of 20,000 shares at an average price of $62.23. The insider received around $1.24 million from selling those shares.
• What's Happening: The company, last month, posted downbeat quarterly results.
• What Micron Technology Does: Micron historically focused on designing and manufacturing DRAM for PCs.