![Former 'Shark Tank' contestant Jamie Siminoff turns into Guest Shark in 10th season premiere - ABC7 San Francisco Former 'Shark Tank' contestant Jamie Siminoff turns into Guest Shark in 10th season premiere - ABC7 San Francisco](https://cdn.abcotvs.com/dip/images/4419307_100518-wabc-jamie-siminoff-shark-tank-img.jpg?w=1600)
Former 'Shark Tank' contestant Jamie Siminoff turns into Guest Shark in 10th season premiere - ABC7 San Francisco
![Watch: “Shark Tank” judges reject Jamie Siminoff's idea for Ring that Amazon spent $1 billion on — Quartz Watch: “Shark Tank” judges reject Jamie Siminoff's idea for Ring that Amazon spent $1 billion on — Quartz](https://cms.qz.com/wp-content/uploads/2018/02/screen-shot-2018-02-28-at-3-18-35-pm-e1519806328910.png?quality=75&strip=all&w=1200&h=630&crop=1)
Watch: “Shark Tank” judges reject Jamie Siminoff's idea for Ring that Amazon spent $1 billion on — Quartz
![Shark Tank's billion-dollar blunder: How startup Ring went from TV rejection to Amazon acquisition – GeekWire Shark Tank's billion-dollar blunder: How startup Ring went from TV rejection to Amazon acquisition – GeekWire](https://cdn.geekwire.com/wp-content/uploads/2019/04/1123-Summit-Day-1-2018-630x420.jpg)
Shark Tank's billion-dollar blunder: How startup Ring went from TV rejection to Amazon acquisition – GeekWire
Shark Tank's billion-dollar blunder: How startup Ring went from TV rejection to Amazon acquisition – GeekWire
![Shark Tank's billion-dollar blunder: How startup Ring went from TV rejection to Amazon acquisition – GeekWire Shark Tank's billion-dollar blunder: How startup Ring went from TV rejection to Amazon acquisition – GeekWire](https://i0.wp.com/cdn.geekwire.com/wp-content/uploads/2018/02/ring-amazon.png?resize=350%2C200&ssl=1)