The Silicon Valley firm swallowed up Sourcefire for $2.7 billion in October, closing a deal announced in July.
Cisco wasn't Sourcefire's first suitor — an anti-spam firm offered $206 million in 2008 for the then-struggling Sourcefire — not even a tenth of what Cisco later paid.
Tech entrepreneur Martin Roesch started Sourcefire in 2001, building it around a free network security program he'd developed three years earlier.
"I had ideas of how to monetize an open-source project, so I took the ball and ran with it," Roesch said in July. "And it worked. Not too many people thought it would."
—Jamie Smith HopkinsLloyd Fox, Baltimore Sun