No Dragon invested in Tangle Teezer after its founder Shaun Pulfrey appeared on Dragon's Den.
Pulfrey's appearance is remembered because the product later became highly successful despite failing to secure the investment sought in the pitch. The brush, first presented under the name Hair Organizer, was developed and commercialised outside the deal-making outcome shown on screen.
This is not a claim that the product lacked commercial support altogether. Tangle Teezer later grew into a recognised haircare brand through its own business development and sales. The important distinction is between later success and an investment from one of the programme's Dragons.
Viewers sometimes attach the story to a familiar investor, especially because many successful pitches did receive backing. In this case, however, the correct investor outcome is that none of the Dragons invested in the business during the programme.