Actually amazing part of this is MPLS phenomenon...

Mario Mazzola, Prem Jain, Luca Cafiero, and Soni Jiandani (long known collectively at and around Cisco as MPLS) have played key roles in Cisco’s “spin in” strategy under former CEO John Chambers.

while John Chambers was the CEO he I think bought four (!) companies that these folks had created.

https://www.businessinsider.in/enterprise/mobile/why-cisco-h...

They beat most of 'serial entrepreneurs' hands down.