Editor's Note: Any reference to TheStreet Ratings and its underlying recommendation does not reflect the opinion of TheStreet, Inc. or any of its contributors including Jim Cramer or Stephanie Link.

Yesterday, Nov. 12, 2014, 173 U.S. common stocks issued filings of shares being bought or sold by insiders. The transactions ranged in value from $57.29 to $21,893,760.00.

Highlighted Stocks Traded by Insiders:

American Tower (AMT) - FREE Research Report

Katz Carolyn, who is Director at American Tower, sold 3,750 shares at $99.06 on Nov. 12, 2014. Following this transaction, the Director owned 5,427 shares meaning that the stake was reduced by 40.86% with the 3,750-share transaction.

The shares most recently traded at $100.40, up $1.34, or 1.33% since the insider transaction. Historical insider transactions for American Tower go as follows:

  • 4-Week # shares bought: 2,900
  • 4-Week # shares sold: 5,000
  • 12-Week # shares bought: 2,900
  • 12-Week # shares sold: 10,000
  • 24-Week # shares bought: 2,900
  • 24-Week # shares sold: 23,000

The average volume for American Tower has been 2.1 million shares per day over the past 30 days. American Tower has a market cap of $39.4 billion and is part of the financial sector and real estate industry. Shares are up 24.96% year-to-date as of the close of trading on Wednesday.

American Tower Corporation is a real estate investment trust. It invests in the real estate markets across the globe. The firm through its subsidiaries owns, operates and develops wireless and broadcast communications real estate. The stock currently has a dividend yield of 1.45%. The company has a P/E ratio of 54.4. Currently, there are 10 analysts who rate American Tower a buy, no analysts rate it a sell, and 2 rate it a hold.

Exclusive Offer: Get the latest Stock Analysis on AMT - FREE

TheStreet Quant Ratings rates American Tower as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, notable return on equity, solid stock price performance, good cash flow from operations and growth in earnings per share. Although the company may harbor some minor weaknesses, we feel they are unlikely to have a significant impact on results. Get the full American Tower Ratings Report from TheStreet Quant Ratings now.

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Palo Alto Networks (PANW) - FREE Research Report

Zuk Nir, who is Cto at Palo Alto Networks, sold 30,000 shares at $106.49 on Nov. 12, 2014. Following this transaction, the Cto owned 2.7 million shares meaning that the stake was reduced by 1.1% with the 30,000-share transaction.

The shares most recently traded at $110.45, up $3.96, or 3.59% since the insider transaction. Historical insider transactions for Palo Alto Networks go as follows:

  • 4-Week # shares sold: 614
  • 12-Week # shares sold: 175,810
  • 24-Week # shares sold: 275,515

The average volume for Palo Alto Networks has been 2.1 million shares per day over the past 30 days. Palo Alto Networks has a market cap of $8.7 billion and is part of the technology sector and computer hardware industry. Shares are up 89.47% year-to-date as of the close of trading on Wednesday.

Palo Alto Networks, Inc. provides enterprise security platform to enterprises, service providers, and government entities worldwide. Currently, there are 20 analysts who rate Palo Alto Networks a buy, no analysts rate it a sell, and 4 rate it a hold.

Exclusive Offer: Get the latest Stock Analysis on PANW - FREE

TheStreet Quant Ratings rates Palo Alto Networks as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, solid stock price performance and expanding profit margins. However, as a counter to these strengths, we also find weaknesses including deteriorating net income, disappointing return on equity and weak operating cash flow. Get the full Palo Alto Networks Ratings Report from TheStreet Quant Ratings now.

STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more.

MKS Instruments (MKSI) - FREE Research Report

Abrams John R, who is Sr. VP, Global Sales at MKS Instruments, sold 2,058 shares at $36.58 on Nov. 12, 2014. Following this transaction, the Sr. VP, Global Sales owned 1 shares meaning that the stake was reduced by 99.97% with the 2,058-share transaction.

The shares most recently traded at $36.44, down $0.14, or 0.38% since the insider transaction. Historical insider transactions for MKS Instruments go as follows:

  • 4-Week # shares bought: 1,161
  • 4-Week # shares sold: 12,556
  • 12-Week # shares bought: 1,161
  • 12-Week # shares sold: 18,656
  • 24-Week # shares bought: 1,161
  • 24-Week # shares sold: 52,602

The average volume for MKS Instruments has been 292,200 shares per day over the past 30 days. MKS Instruments has a market cap of $1.9 billion and is part of the technology sector and electronics industry. Shares are up 23.46% year-to-date as of the close of trading on Wednesday.

MKS Instruments, Inc. operates as a provider of instruments, subsystems, and process control solutions that measure, control, power, monitor, and analyze critical parameters of manufacturing processes in the United States and internationally. The stock currently has a dividend yield of 1.8%. The company has a P/E ratio of 19.3. Currently, there are 4 analysts who rate MKS Instruments a buy, no analysts rate it a sell, and none rate it a hold.

Exclusive Offer: Get the latest Stock Analysis on MKSI - FREE

TheStreet Quant Ratings rates MKS Instruments as a buy. The company's strengths can be seen in multiple areas, such as its compelling growth in net income, revenue growth, largely solid financial position with reasonable debt levels by most measures, solid stock price performance and reasonable valuation levels. Although no company is perfect, currently we do not see any significant weaknesses which are likely to detract from the generally positive outlook. Get the full MKS Instruments Ratings Report from TheStreet Quant Ratings now.

STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more.

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