The manufacturer is apparently intends to hit a target value of between $2.5bn and $3bn (£1.8bn - £2.16bn).
The decision to file confidentially is one other large tech companies, like Twitter and Snap (formerly Snapchat), have taken - it's an option for businesses that generate less than $1bn in revenue yearly.
Sonos' major competitors are many and various. While the company has a loyal user base thanks to its reliability and range of speakers, it's attacked by premium manufacturers like Denon (with its HEOS system) as well as Bluesound's multiroom products, while also contending with challenges from the likes of Amazon.
It also needs to differentiate itself from Apple and its sonically impressive HomePod, another factor future investors will have to take into consideration.
Sonos has yet to comment on the news.