Scare yourself

Greg Murtagh is one of the Tampa region's most heralded entrepreneurs, best known for building Triad Retail Media into a digital advertising giant with nearly $300 million in annual sales.

The St. Petersburg-based firm, beyond fast growth, helped corporate giants such as eBay and Wal-Mart discover new ways to create targeted Web ads. Murtagh, the Business Observer's 2014 Entrepreneur of the Year, led the company from startup in 2004 to 12 offices worldwide and more than 540 employees in a decade. He left Triad in October, both to step back and find new challenges.

Now Murtagh is back in startup mode, with two companies: One is an investment vehicle for up-and-coming digital marketing firms called Dorsal Ventures, and the other, Seismic, provides consulting services.