Fortinet Inc. /zigman2/quotes/205733290/composite FTNT +0.65% said Thursday that it plans to implement the previously disclosed five-for-one stock split on June 22. The split is contingent on shareholders approving at the June 17 annual meeting a proposal to increase the number of shares outstanding so the split could take effect. The plans for the stock split were first disclosed in an 8-K filing with the Securities and Exchange Commission after the April 22 close. If the stock split takes effect, it would be the first since a 2-for-1 split in June 2011, and the second since the cybersecurity company went public in November 2009. Based on Wednesday's stock closing price of $300.53, a split would reduce the price to $60.11. The stock, which rallied 1.2% in premarket trading, has lost 1.2% since April 22 through Wednesday, while the S&P 500 /zigman2/quotes/210599714/realtime SPX +0.23% has lost 3.7% over the same time.