 Shares of Concert Pharmaceuticals Inc NASDAQ:CNCE fell by 1.8 from the previous closing price. Stuart Nancy filed a Form 4 with the SEC on Wednesday, June 24. The insider sold 10,295 shares at an average price of 11.34. After the transaction, the executives stake in Concert Pharmaceuticals Inc. moved to 157,629 shares.Why Insider Transactions Are Important? While transactions from an insider shouldnt be used as the sole item to make an investment or trading decision, an insider buying or selling stock in their company can be a good added factor that leads to more conviction in a decision.Insiders buying stock after a notable sell off can indicate an insiders long-term belief in the success of the company; insiders buying stock at new highs can be an indication the exec doesnt feel the stock is overvalued. Insiders who sell stock at new lows could be anticipating some capitulation moment. If the insider sells at new highs, it could point to the intention to take some profit and lock in a gain.Transaction Codes To Focus On Investors prefer focusing on transactions which take place in the open market, indicated in the Form 4 with codes P for purchase and S for sale. If the transaction was an open-market transaction, that means that the insider made a concious decision for the companys stock moving forward.Transaction codes besides P or S arent relatively important as they are seldom tied to a decision by the executive. For example, transaction code A is indicative of an insider being forced to sell shares to attain compensation. Moreover, transaction code C indicates the conversion of an option.See more from Benzinga A Look Into Dells Price Over Earnings Price Over Earnings Overview: Renewable Energy Group Price Over Earnings Overview: AeroVironmentC 2020 Benzinga.com. Benzinga does not provide investment advice. All rights reserved. 