Bruce R. Hazelgrove III), EVP & CAO at NewMarket (NYSE:NEU), reported an insider sell on August 13, according to a new SEC filing. What Happened: III) opted to sell 1,270 shares of NewMarket, according to a Form 4 filing with the U.S. Securities and Exchange Commission on Tuesday. The transaction’s total worth stands at $691,271. Monitoring the market, NewMarket’s shares down by 0.0% at $547.92 during Wednesday’s morning. Delving into NewMarket’s BackgroundNewMarket Corp is a holding company that, through its subsidiaries, manufactures and sells petroleum additives. Petroleum additives are use…