The stock has already soared, the numbers keep accelerating, and one concentrated fund just made it a core holding anyway.London-based Sand Grove Capital Management initiated a new position in CyberArk Software Ltd. (CYBR 0.62%), adding 39,121 shares worth an estimated $18.90 million, per a November 14 SEC filing.What HappenedAccording to a filing with the Securities and Exchange Commission dated November 14, Sand Grove Capital Management LLP reported a new position in CyberArk Software Ltd. (CYBR 0.62%), b ...