There are four main publicly-traded quantum computing companies, and they all have one thing in common: In the last 14 months, all of them have been the target of activist investors shorting their stock.This isn’t totally surprising. All four companies—D-Wave Quantum, IonQ, Rigetti Computing, and Quantum Computing Inc.—have market caps in the billions of dollars, which in no way reflect the modest revenues generated by their day-to-day businesses.Alan Baratz, CEO of the 27-year-old Palo Alto, California-bas ...