The shares of AAON Inc. AAON -1.12% rose 3.1% on Friday in premarket trade after the HVAC company announced a split of its common stock three for two. On August 16, shareholders who were registered on July 28th will receive an extra share for every two shares that they hold. The split will reduce the stock price by one third, but increase the number of outstanding shares to 81.6 millions from 54.4million. A 3-for-2 stock split would reduce the closing price on Thursday to $61.53 based on the $92.29 price. The last time the company split its stock was in July 2014, which was also a 3-for-2. AAON stock, which reached a record closing price of $103.26 on 5 May, has risen 65.5% in the last 12 months, while the S&P500 SPX, -0.79% is up 13.0%.