Jamie Siminoff says break to Kevin O’Leary! Jamie received a “sharky” offer from Mr. Wonderful during his time in the tank but turned it down. Years later, Kevin himself admitted that not investing in ring was the biggest mistake in Shark Tank history. Listen to the full conversation on buildorbreak, on YouTube or wherever you get your podcasts. #BuildOrBreak #DanielLubetzky #JamieSiminoff