The Nasdaq 100 closed lower by around 1% during Monday's session. Investors, meanwhile, focused on some notable insider trades.

When insiders sell shares, it could be a preplanned sale, or could indicate their concern in the company's prospects or that they view the stock as being overpriced. 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.

Microsoft

• The Trade: Microsoft Corporation (NASDAQ:MSFT) CEO Satya Nadella sold a total of 14,398 shares at an average price of $417.41. The insider received around $6 million from selling those shares.
• What's Happening: Microsoft recently disclosed segment restructuring and revised guidance.
• What Microsoft Does: Microsoft develops and licenses consumer and enterprise software. It is known for its Windows operating systems and Office productivity suite.
• Benzinga Pro's real-time newsfeed alerted to latest MSFT news.

Synaptics

• The Trade: Synaptics Incorporated (NASDAQ:SYNA) Vikram Gupta sold a total of 1,870 shares at an average price of $80.00. The insider received around $149,600 from selling those shares.
• What's Happening: On Aug. 8, Synaptics posted better-than-expected quarterly earnings.
• What Synaptics Does: Synaptics Inc is a producer of semiconductor solutions for the mobile, PC, and Internet of Things markets.
• Benzinga Pro’s earnings calendar was used to track upcoming SYNA’s earnings reports.

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