Lam Research Corp is trading 3.4% up at $386.79 in after-hours trading, extending gains fueled by strong catalysts. * The company received significant analyst endorsements on June 17, with Citi raising its price target to $450 from $315, and Rothschild & Co Redburn increasing its target to $420 from $305. * The broader semiconductor sector experienced a rally, partly driven by Intel's announcement that its 18A-P manufacturing process entered risk production. * June 17 also marked Lam Research's ex-dividend date.