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.

Yesterday, April 21, 2015, 38 U.S. common stocks issued filings of shares being bought or sold by insiders. The transactions ranged in value from $259.00 to $5,226,379.88.

Highlighted Stocks Traded by Insiders:

Griffin Land & Nurseries (GRIF) - FREE Research Report

Churchill Winston J, who is Director at Griffin Land & Nurseries, sold 14,224 shares at $31.80 on April 21, 2015. Following this transaction, the Director owned 2,429 shares meaning that the stake was reduced by 85.41% with the 14,224-share transaction.

The shares most recently traded at $31.40, down $0.40, or 1.27% since the insider transaction. Historical insider transactions for Griffin Land & Nurseries go as follows:

  • 4-Week # shares sold: 35,000
  • 12-Week # shares sold: 35,000
  • 24-Week # shares sold: 35,000

The average volume for Griffin Land & Nurseries has been 4,800 shares per day over the past 30 days. Griffin Land & Nurseries has a market cap of $164.3 million and is part of the financial sector and real estate industry. Shares are up 4.38% year-to-date as of the close of trading on Thursday.

Griffin Land & Nurseries, Inc., through its subsidiary, Griffin Land, LLC, operates in the real estate business in the United States. The company develops, manages, and leases industrial and commercial properties. The stock currently has a dividend yield of 0.63%.

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TheStreet Quant Ratings rates Griffin Land & Nurseries as a hold. The company's strengths can be seen in multiple areas, such as its compelling growth in net income, largely solid financial position with reasonable debt levels by most measures and good cash flow from operations. However, as a counter to these strengths, we also find weaknesses including feeble growth in the company's earnings per share and disappointing return on equity. Get the full Griffin Land & Nurseries Ratings Report from TheStreet Quant Ratings now.

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Amtech Systems (ASYS) - FREE Research Report

Schreyer Leslie J, who is 10% Owner at Amtech Systems, bought 25,000 shares at $11.09 on April 21, 2015. Following this transaction, the 10% Owner owned 1.3 million shares meaning that the stake was boosted by 1.91% with the 25,000-share transaction.

The shares most recently traded at $11.53, up $0.44, or 3.83% since the insider transaction. Historical insider transactions for Amtech Systems go as follows:

  • 4-Week # shares bought: 150,000
  • 4-Week # shares sold: 2,000
  • 12-Week # shares bought: 345,000
  • 12-Week # shares sold: 2,000
  • 24-Week # shares bought: 470,000
  • 24-Week # shares sold: 2,000

The average volume for Amtech Systems has been 59,300 shares per day over the past 30 days. Amtech Systems has a market cap of $151.2 million and is part of the technology sector and electronics industry. Shares are up 13.82% year-to-date as of the close of trading on Tuesday.

Amtech Systems, Inc. designs, assembles, sells, and installs capital equipment and related consumables used in the manufacture of wafers, primarily for the solar and semiconductor industries worldwide. Currently, there are 4 analysts who rate Amtech Systems a buy, no analysts rate it a sell, and none rate it a hold.

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TheStreet Quant Ratings rates Amtech Systems as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, disappointing return on equity and poor profit margins. Get the full Amtech Systems Ratings Report from TheStreet Quant Ratings now.

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Applied Optoelectronics (AAOI) - FREE Research Report

Yeh Shu-Hua (Joshua), who is Officer at Applied Optoelectronics, sold 3,000 shares at $15.03 on April 21, 2015. Following this transaction, the Officer owned 69,741 shares meaning that the stake was reduced by 4.12% with the 3,000-share transaction.

The shares most recently traded at $14.80, down $0.22, or 1.52% since the insider transaction. Historical insider transactions for Applied Optoelectronics go as follows:

  • 4-Week # shares sold: 11,787
  • 12-Week # shares sold: 11,787
  • 24-Week # shares sold: 15,193

The average volume for Applied Optoelectronics has been 248,200 shares per day over the past 30 days. Applied Optoelectronics has a market cap of $220.1 million and is part of the technology sector and electronics industry. Shares are up 33.42% year-to-date as of the close of trading on Tuesday.

Applied Optoelectronics, Inc. designs and manufactures optical communications products for Internet data center, cable television (CATV), and fiber-to-the-home markets. The company has a P/E ratio of 52.7. Currently, there are 6 analysts who rate Applied Optoelectronics a buy, no analysts rate it a sell, and none rate it a hold.

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TheStreet Quant Ratings rates Applied Optoelectronics as a sell. Among the areas we feel are negative, one of the most important has been a generally disappointing historical performance in the stock itself. Get the full Applied Optoelectronics Ratings Report from TheStreet Quant Ratings now.

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