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, Feb. 17, 2015, 76 U.S. common stocks issued filings of shares being bought or sold by insiders. The transactions ranged in value from $32.20 to $7,735,729,234.17.

Highlighted Stocks Traded by Insiders:

Proto Labs (PRLB) - FREE Research Report

Tumelty John B., who is VP/GM & Managing Director-EMEA at Proto Labs, sold 364 shares at $71.67 on Feb. 17, 2015. Following this transaction, the VP/GM & Managing Director-EMEA owned 4,221 shares meaning that the stake was reduced by 7.94% with the 364-share transaction.

The shares most recently traded at $73.10, up $1.43, or 1.96% since the insider transaction. Historical insider transactions for Proto Labs go as follows:

  • 4-Week # shares bought: 3,200
  • 4-Week # shares sold: 1.0 million
  • 12-Week # shares bought: 3,200
  • 12-Week # shares sold: 1.0 million
  • 24-Week # shares bought: 3,200
  • 24-Week # shares sold: 1.0 million

The average volume for Proto Labs has been 301,500 shares per day over the past 30 days. Proto Labs has a market cap of $1.9 billion and is part of the industrial goods sector and industrial industry. Shares are up 9.46% year-to-date as of the close of trading on Tuesday.

Proto Labs, Inc., together with its subsidiaries, manufactures computer numerical control (CNC) machined and injection molded custom parts for prototyping and short-run production. The company has a P/E ratio of 42.8. Currently, there are 6 analysts who rate Proto Labs a buy, no analysts rate it a sell, and 2 rate it a hold.

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

TheStreet Quant Ratings rates Proto Labs as a hold. 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 and growth in earnings per share. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, premium valuation and disappointing return on equity. Get the full Proto Labs 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.

Gevo (GEVO) - FREE Research Report

Lund Brett, who is EVP, GC and Secretary at Gevo, sold 619 shares at $0.22 on Feb. 17, 2015. Following this transaction, the EVP, GC and Secretary owned 76,260 shares meaning that the stake was reduced by 0.81% with the 619-share transaction.

Ryan Christopher Michael, who is President and COO at Gevo, sold 1,809 shares at $0.22 on Feb. 17, 2015. Following this transaction, the President and COO owned 332,901 shares meaning that the stake was reduced by 0.54% with the 1,809-share transaction.

Roda Gregory, who is Chief Commercial Officer at Gevo, sold 238 shares at $0.22 on Feb. 17, 2015. Following this transaction, the Chief Commercial Officer owned 34,332 shares meaning that the stake was reduced by 0.69% with the 238-share transaction.

Willis Mike, who is Cfo at Gevo, sold 306 shares at $0.22 on Feb. 17, 2015. Following this transaction, the Cfo owned 114,222 shares meaning that the stake was reduced by 0.27% with the 306-share transaction.

The shares most recently traded at $0.26, up $0.04, or 13.65% since the insider transaction. Historical insider transactions for Gevo go as follows:

  • 4-Week # shares bought: 181,484
  • 4-Week # shares sold: 1,755
  • 12-Week # shares bought: 181,484
  • 12-Week # shares sold: 46,718
  • 24-Week # shares bought: 181,484
  • 24-Week # shares sold: 95,677

The average volume for Gevo has been 2.4 million shares per day over the past 30 days. Gevo has a market cap of $22.8 million and is part of the basic materials sector and chemicals industry. Shares are down 12.5% year-to-date as of the close of trading on Tuesday.

Gevo, Inc., a renewable chemicals and biofuels company, focuses primarily on the production and sale of isobutanol and related products from renewable feedstocks. Currently, there are 2 analysts who rate Gevo a buy, no analysts rate it a sell, and none rate it a hold.

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

TheStreet Quant Ratings rates Gevo 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 Gevo 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.

Orbitz Worldwide (OWW) - FREE Research Report

Par Investment Partners Lp, who is 10% Owner at Orbitz Worldwide, sold 16.5 million shares at $11.67 on Feb. 17, 2015. Following this transaction, the 10% Owner owned 0 shares meaning that the stake was reduced by 100% with the 16.5 million-share transaction.

Rogers James F, who is SVP, GC and Secretary at Orbitz Worldwide, sold 8,624 shares at $11.69 on Feb. 17, 2015. Following this transaction, the SVP, GC and Secretary owned 24,912 shares meaning that the stake was reduced by 25.72% with the 8,624-share transaction.

The shares most recently traded at $11.64, down $0.05, or 0.43% since the insider transaction. Historical insider transactions for Orbitz Worldwide go as follows:

  • 4-Week # shares sold: 13,064
  • 12-Week # shares sold: 313,844
  • 24-Week # shares sold: 335,202

The average volume for Orbitz Worldwide has been 4.1 million shares per day over the past 30 days. Orbitz Worldwide has a market cap of $1.3 billion and is part of the services sector and leisure industry. Shares are up 41.43% year-to-date as of the close of trading on Tuesday.

Orbitz Worldwide, Inc. operates as an online travel company worldwide. It enables leisure and business travelers to research, plan, and book a range of travel products and services. The company has a P/E ratio of 83.4. Currently, there are 2 analysts who rate Orbitz Worldwide a buy, no analysts rate it a sell, and 5 rate it a hold.

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

TheStreet Quant Ratings rates Orbitz Worldwide as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, notable return on equity and solid stock price performance. However, as a counter to these strengths, we also find weaknesses including unimpressive growth in net income, generally higher debt management risk and feeble growth in the company's earnings per share. Get the full Orbitz Worldwide 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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