STX is trading at $751 (-4.5%) amid a pullback from its recent all-time high, with recent insider sales and valuation concerns contributing to the decline. - An executive vice president and a director sold shares on May 4 and May 5, respectively, under pre-arranged trading plans. - Analysts also note valuation concerns and technical indicators suggesting the stock was in "overbought" territory after a rapid ~70% gain over the past month. - The stock is retreating from its all-time high close of $786.42 set on May 6.