Subex Systems used to be an investor darling during the last Nasdaq tech boom but like many midcap IT companies, it fell out of favour. What distinguished founder Subash Menon from the rest of the pack was his aggressive acquisition streak. After resigning from Subex in September 2012 under pressure from a new board of directors, Menon is now looking to exit Subex altogether as can be seen from his recent selling bout on the bourses.