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, March 23, 2015, 74 U.S. common stocks issued filings of shares being bought or sold by insiders. The transactions ranged in value from $987.00 to $64,149,572.70.

Highlighted Stocks Traded by Insiders:

PharmAthene (PIP) - FREE Research Report

St Peter Steven, who is Director at PharmAthene, bought 25,000 shares at $1.65 on March 23, 2015. Following this transaction, the Director owned 25,000 shares meaning that the stake was boosted by 100% with the 25,000-share transaction.

The shares most recently traded at $1.70, up $0.05, or 3.03% since the insider transaction.

The average volume for PharmAthene has been 158,200 shares per day over the past 30 days. PharmAthene has a market cap of $101.2 million and is part of the health care sector and drugs industry. Shares are down 9.39% year-to-date as of the close of trading on Monday.

PharmAthene, Inc., a biodefense company, develops and commercializes medical countermeasures against biological and chemical threats in the United States. Currently, there is 1 analyst who rates PharmAthene a buy, no analysts rate it a sell, and none rate it a hold.

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TheStreet Quant Ratings rates PharmAthene 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 PharmAthene Ratings Report from TheStreet Quant Ratings now.

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Teradyne (TER) - FREE Research Report

Bradley Michael A, who is Director at Teradyne, sold 5,000 shares at $20.08 on March 23, 2015. Following this transaction, the Director owned 130,956 shares meaning that the stake was reduced by 3.68% with the 5,000-share transaction.

The shares most recently traded at $19.99, down $0.09, or 0.45% since the insider transaction. Historical insider transactions for Teradyne go as follows:

  • 4-Week # shares sold: 21,877
  • 12-Week # shares sold: 41,877
  • 24-Week # shares sold: 105,839

The average volume for Teradyne has been 1.6 million shares per day over the past 30 days. Teradyne has a market cap of $4.4 billion and is part of the technology sector and electronics industry. Shares are up 1.11% year-to-date as of the close of trading on Monday.

Teradyne, Inc. provides automatic test equipment worldwide. The stock currently has a dividend yield of 1.19%. The company has a P/E ratio of 54.3. Currently, there are 6 analysts who rate Teradyne a buy, no analysts rate it a sell, and 1 rates it a hold.

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

TheStreet Quant Ratings rates Teradyne as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures, good cash flow from operations and expanding profit margins. We feel these strengths outweigh the fact that the company has had sub par growth in net income. Get the full Teradyne Ratings Report from TheStreet Quant Ratings now.

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Ambarella (AMBA) - FREE Research Report

Day Christopher, who is VP of Marketing at Ambarella, sold 2,500 shares at $71.02 on March 23, 2015. Following this transaction, the VP of Marketing owned 11,756 shares meaning that the stake was reduced by 17.54% with the 2,500-share transaction.

The shares most recently traded at $73.32, up $2.30, or 3.14% since the insider transaction. Historical insider transactions for Ambarella go as follows:

  • 4-Week # shares sold: 46,787
  • 12-Week # shares sold: 46,787
  • 24-Week # shares sold: 130,543

The average volume for Ambarella has been 2.0 million shares per day over the past 30 days. Ambarella has a market cap of $2.2 billion and is part of the technology sector and electronics industry. Shares are up 42.45% year-to-date as of the close of trading on Monday.

Ambarella, Inc. develops semiconductor processing solutions for video that enable high-definition (HD) video capture, sharing, and display worldwide. The company has a P/E ratio of 36.2. Currently, there are 5 analysts who rate Ambarella a buy, 1 analyst rates it a sell, and 4 rate it a hold.

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

TheStreet Quant Ratings rates Ambarella as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures, notable return on equity, impressive record of earnings per share growth and compelling growth in net income. We feel these strengths outweigh the fact that the company is trading at a premium valuation based on our review of its current price compared to such things as earnings and book value. Get the full Ambarella Ratings Report from TheStreet Quant Ratings now.

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