FireEye Inc. general counsel Alexa King just had the biggest year of her life.

In August 2013, King brought home twin daughters Anya and Katya. A month later, King helped lead her company through its $303 million initial public offering, only to follow up the deal with the purchase of computer forensics company Mandiant Corp. in a $1.05 billion cash-and-stock deal. In March 2014, the company held a follow-on offering.