https://arstechnica.com/gadgets/2018/07/sonos-is-going-public-but-dependence-on-amazon-and-google-is-a-risk/

Smart audio company Sonos has filed with the US Securities and Exchange Commission to go public. In doing so, the company warned investors of potential risk factors, such as Sonos' dependence on competitors like Amazon, and US President Donald Trump's trade tariffs, which might increase costs for companies like Sonos that depend on imports from China.