Shares in Deliveroo plummeted by as much as 30% as it made its highly-anticipated launch on the London Stock Exchange.
Around £2 billion was wiped off the value of takeaway delivery firm as City traders balked at the flotation.
The company opened trading below 270p per share, having said it would launch its shares as a publicly-listed firm at 390p earlier on Wednesday morning.
Prior to trading, Deliveroo had also confirmed that it would be valued at around £7.6 billion, at the bottom of its previously announced range of between £7.6 billion and £8.8 billion.
However, this sank sharply from 8am as City analysts raised further concerns about the business.
The cold opening to trading came after a number of leading UK fund managers said they would reject the listing amid concerns over workers’ rights issues and its shareholder structure.
The company said it would raise around £1 billion through selling shares to new investors, with a further £500 million worth of shares to be sold to existing backers.
Deliveroo said it plans to invest the funds into continuing its growth trajectory and fuelling its innovation efforts.
Will Shu, founder and chief executive, said: “I am very proud that Deliveroo is going public in London – our home.
“As we reach this milestone I want to thank everyone who has helped to build Deliveroo into the company it is today – in particular our restaurants and grocers, riders and customers.
“In this next phase of our journey as a public company we will continue to invest in the innovations that help restaurants and grocers to grow their businesses, to bring customers more choice than ever before, and to provide riders with more work.
“Our aim is to build the definitive online food company and we’re very excited about the future ahead.”
Firms have also raised concerns over the share structure, which will see Mr Shu have 20 votes per share, compared with one per share for other investors, giving him a majority position at shareholder votes.
Shares in the company had rebounded marginally to 302.4p at 9.15am.